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MicroRNA - Wikipedia

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class="vector-toc-numb">1</span> <span>Storia</span> </div> </a> <ul id="toc-Storia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Nomenclatura" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Nomenclatura"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Nomenclatura</span> </div> </a> <ul id="toc-Nomenclatura-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Biogenesi_e_maturazione" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Biogenesi_e_maturazione"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Biogenesi e maturazione</span> </div> </a> <button aria-controls="toc-Biogenesi_e_maturazione-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Attiva/disattiva la sottosezione Biogenesi e maturazione</span> </button> <ul id="toc-Biogenesi_e_maturazione-sublist" class="vector-toc-list"> <li id="toc-Trascrizione" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Trascrizione"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.1</span> <span>Trascrizione</span> </div> </a> <ul id="toc-Trascrizione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Processamento" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Processamento"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.2</span> <span>Processamento</span> </div> </a> <ul id="toc-Processamento-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Esportazione_dal_nucleo" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Esportazione_dal_nucleo"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.3</span> <span>Esportazione dal nucleo</span> </div> </a> <ul id="toc-Esportazione_dal_nucleo-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Processamento_nel_citoplasma" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Processamento_nel_citoplasma"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.4</span> <span>Processamento nel citoplasma</span> </div> </a> <ul id="toc-Processamento_nel_citoplasma-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Turnover" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Turnover"> <div class="vector-toc-text"> <span class="vector-toc-numb">3.5</span> <span>Turnover</span> </div> </a> <ul id="toc-Turnover-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Il_complesso_di_silenziamento_indotto_da_RNA" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Il_complesso_di_silenziamento_indotto_da_RNA"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Il complesso di silenziamento indotto da RNA</span> </div> </a> <button aria-controls="toc-Il_complesso_di_silenziamento_indotto_da_RNA-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Attiva/disattiva la sottosezione Il complesso di silenziamento indotto da RNA</span> </button> <ul id="toc-Il_complesso_di_silenziamento_indotto_da_RNA-sublist" class="vector-toc-list"> <li id="toc-Modalità_di_silenziamento" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Modalità_di_silenziamento"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Modalità di silenziamento</span> </div> </a> <ul id="toc-Modalità_di_silenziamento-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Evoluzione" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Evoluzione"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Evoluzione</span> </div> </a> <ul id="toc-Evoluzione-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Funzioni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Funzioni"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Funzioni</span> </div> </a> <ul id="toc-Funzioni-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Patologie_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Patologie_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>Patologie correlate</span> </div> </a> <button aria-controls="toc-Patologie_correlate-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Attiva/disattiva la sottosezione Patologie correlate</span> </button> <ul id="toc-Patologie_correlate-sublist" class="vector-toc-list"> <li id="toc-Neoplasie" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Neoplasie"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.1</span> <span>Neoplasie</span> </div> </a> <ul id="toc-Neoplasie-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Malattie_cardiache" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Malattie_cardiache"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.2</span> <span>Malattie cardiache</span> </div> </a> <ul id="toc-Malattie_cardiache-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Sistema_nervoso" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Sistema_nervoso"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.3</span> <span>Sistema nervoso</span> </div> </a> <ul id="toc-Sistema_nervoso-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Diabete" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Diabete"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.4</span> <span>Diabete</span> </div> </a> <ul id="toc-Diabete-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Danno_d&#039;organo" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Danno_d&#039;organo"> <div class="vector-toc-text"> <span class="vector-toc-numb">7.5</span> <span>Danno d'organo</span> </div> </a> <ul id="toc-Danno_d&#039;organo-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Note" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Note"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>Note</span> </div> </a> <ul id="toc-Note-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bibliografia" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bibliografia"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>Bibliografia</span> </div> </a> <ul id="toc-Bibliografia-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Voci_correlate" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Voci_correlate"> <div class="vector-toc-text"> <span class="vector-toc-numb">10</span> <span>Voci correlate</span> </div> </a> <ul id="toc-Voci_correlate-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Altri_progetti" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Altri_progetti"> <div class="vector-toc-text"> <span class="vector-toc-numb">11</span> <span>Altri progetti</span> </div> </a> <ul id="toc-Altri_progetti-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Collegamenti_esterni" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collegamenti_esterni"> <div class="vector-toc-text"> <span class="vector-toc-numb">12</span> <span>Collegamenti esterni</span> </div> </a> <ul id="toc-Collegamenti_esterni-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Indice" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Indice" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Mostra/Nascondi l&#039;indice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Mostra/Nascondi l&#039;indice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">MicroRNA</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Vai a una voce in un&#039;altra lingua. Disponibile in 37 lingue" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-37" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">37 lingue</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AD%D9%85%D8%B6_%D8%B1%D9%8A%D8%A8%D9%88%D8%B2%D9%8A_%D9%86%D9%88%D9%88%D9%8A_%D9%85%D9%8A%D9%83%D8%B1%D9%88%D9%8A" title="حمض ريبوزي نووي ميكروي - arabo" lang="ar" hreflang="ar" data-title="حمض ريبوزي نووي ميكروي" data-language-autonym="العربية" data-language-local-name="arabo" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%AE%E0%A6%BE%E0%A6%87%E0%A6%95%E0%A7%8D%E0%A6%B0%E0%A7%8B-%E0%A6%86%E0%A6%B0%E0%A6%8F%E0%A6%A8%E0%A6%8F" title="মাইক্রো-আরএনএ - bengalese" lang="bn" hreflang="bn" data-title="মাইক্রো-আরএনএ" data-language-autonym="বাংলা" data-language-local-name="bengalese" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Mikro_RNK" title="Mikro RNK - bosniaco" lang="bs" hreflang="bs" data-title="Mikro RNK" data-language-autonym="Bosanski" data-language-local-name="bosniaco" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/MicroARN" title="MicroARN - catalano" lang="ca" hreflang="ca" data-title="MicroARN" data-language-autonym="Català" data-language-local-name="catalano" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/MiRNA" title="MiRNA - ceco" lang="cs" hreflang="cs" data-title="MiRNA" data-language-autonym="Čeština" data-language-local-name="ceco" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/MikroRNA" title="MikroRNA - danese" lang="da" hreflang="da" data-title="MikroRNA" data-language-autonym="Dansk" data-language-local-name="danese" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/MicroRNA" title="MicroRNA - tedesco" lang="de" hreflang="de" data-title="MicroRNA" data-language-autonym="Deutsch" data-language-local-name="tedesco" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/MicroRNA" title="MicroRNA - inglese" lang="en" hreflang="en" data-title="MicroRNA" data-language-autonym="English" data-language-local-name="inglese" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Micro-ARN" title="Micro-ARN - spagnolo" lang="es" hreflang="es" data-title="Micro-ARN" data-language-autonym="Español" data-language-local-name="spagnolo" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Mikro-RNA" title="Mikro-RNA - estone" lang="et" hreflang="et" data-title="Mikro-RNA" data-language-autonym="Eesti" data-language-local-name="estone" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/MicroRNA" title="MicroRNA - basco" lang="eu" hreflang="eu" data-title="MicroRNA" data-language-autonym="Euskara" data-language-local-name="basco" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B1%DB%8C%D8%B2%D8%A2%D8%B1%D8%A7%D9%86%E2%80%8C%D8%A7%DB%8C" title="ریزآران‌ای - persiano" lang="fa" hreflang="fa" data-title="ریزآران‌ای" data-language-autonym="فارسی" data-language-local-name="persiano" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Mikro-RNA" title="Mikro-RNA - finlandese" lang="fi" hreflang="fi" data-title="Mikro-RNA" data-language-autonym="Suomi" data-language-local-name="finlandese" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Micro-ARN" title="Micro-ARN - francese" lang="fr" hreflang="fr" data-title="Micro-ARN" data-language-autonym="Français" data-language-local-name="francese" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/MicroARN" title="MicroARN - galiziano" lang="gl" hreflang="gl" data-title="MicroARN" data-language-autonym="Galego" data-language-local-name="galiziano" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/MicroRNA" title="MicroRNA - ebraico" lang="he" hreflang="he" data-title="MicroRNA" data-language-autonym="עברית" data-language-local-name="ebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/MikroRNK" title="MikroRNK - croato" lang="hr" hreflang="hr" data-title="MikroRNK" data-language-autonym="Hrvatski" data-language-local-name="croato" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Mikro-RNS" title="Mikro-RNS - ungherese" lang="hu" hreflang="hu" data-title="Mikro-RNS" data-language-autonym="Magyar" data-language-local-name="ungherese" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%84%D5%AB%D5%AF%D6%80%D5%B8%D5%8C%D5%86%D4%B9" title="ՄիկրոՌՆԹ - armeno" lang="hy" hreflang="hy" data-title="ՄիկրոՌՆԹ" data-language-autonym="Հայերեն" data-language-local-name="armeno" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/RNA-mikro" title="RNA-mikro - indonesiano" lang="id" hreflang="id" data-title="RNA-mikro" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonesiano" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/MiRNA" title="MiRNA - islandese" lang="is" hreflang="is" data-title="MiRNA" data-language-autonym="Íslenska" data-language-local-name="islandese" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/MiRNA" title="MiRNA - giapponese" lang="ja" hreflang="ja" data-title="MiRNA" data-language-autonym="日本語" data-language-local-name="giapponese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/MicroRNA" title="MicroRNA - coreano" lang="ko" hreflang="ko" data-title="MicroRNA" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/MiRNR" title="MiRNR - lituano" lang="lt" hreflang="lt" data-title="MiRNR" data-language-autonym="Lietuvių" data-language-local-name="lituano" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/MicroRNA" title="MicroRNA - olandese" lang="nl" hreflang="nl" data-title="MicroRNA" data-language-autonym="Nederlands" data-language-local-name="olandese" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/MiRNA" title="MiRNA - polacco" lang="pl" hreflang="pl" data-title="MiRNA" data-language-autonym="Polski" data-language-local-name="polacco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Micro-ARN" title="Micro-ARN - portoghese" lang="pt" hreflang="pt" data-title="Micro-ARN" data-language-autonym="Português" data-language-local-name="portoghese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Micro-ARN" title="Micro-ARN - rumeno" lang="ro" hreflang="ro" data-title="Micro-ARN" data-language-autonym="Română" data-language-local-name="rumeno" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru badge-Q17437798 badge-goodarticle mw-list-item" title="voce di qualità"><a href="https://ru.wikipedia.org/wiki/%D0%9C%D0%B8%D0%BA%D1%80%D0%BE%D0%A0%D0%9D%D0%9A" title="МикроРНК - russo" lang="ru" hreflang="ru" data-title="МикроРНК" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%B8%E0%B6%BA%E0%B7%92%E0%B6%9A%E0%B7%8A%E2%80%8D%E0%B6%BB%E0%B7%9D-%E0%B6%86%E0%B6%BB%E0%B7%8A.%E0%B6%91%E0%B6%B1%E0%B7%8A.%E0%B6%92." title="මයික්‍රෝ-ආර්.එන්.ඒ. - singalese" lang="si" hreflang="si" data-title="මයික්‍රෝ-ආර්.එන්.ඒ." data-language-autonym="සිංහල" data-language-local-name="singalese" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/MikroRNA" title="MikroRNA - slovacco" lang="sk" hreflang="sk" data-title="MikroRNA" data-language-autonym="Slovenčina" data-language-local-name="slovacco" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sv 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</nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Strumenti pagine"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspetto"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspetto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" 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src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Microrna_secondary_structure.png/240px-Microrna_secondary_structure.png" decoding="async" width="240" height="151" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Microrna_secondary_structure.png/360px-Microrna_secondary_structure.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a7/Microrna_secondary_structure.png/480px-Microrna_secondary_structure.png 2x" data-file-width="684" data-file-height="429" /></a><figcaption>Struttura secondaria di un precursore miRNA di <i><a href="/wiki/Brassica_oleracea" title="Brassica oleracea">Brassica oleracea</a></i>, modellato digitalmente</figcaption></figure> <p>I <b>microRNA</b> (<b>miRNA</b>) sono piccole <a href="/wiki/Molecola" title="Molecola">molecole</a> endogene di <a href="/wiki/RNA_non_codificante" title="RNA non codificante">RNA non codificante</a> riscontrate nel <a href="/wiki/Trascrittoma" title="Trascrittoma">trascrittoma</a> di piante, animali e alcuni virus a <a href="/wiki/DNA" title="DNA">DNA</a>. Sono lunghi circa 20-22 <a href="/wiki/Nucleotide" title="Nucleotide">nucleotidi</a> e principalmente attivi nella <a href="/wiki/Regolazione_dell%27espressione_genica" class="mw-redirect" title="Regolazione dell&#39;espressione genica">regolazione dell'espressione genica</a> a livello <a href="/wiki/Trascrizione_(biologia)" title="Trascrizione (biologia)">trascrizionale</a> e post-trascrizionale. I miRNA vengono inglobati nel <a href="/wiki/RNA-induced_silencing_complex" class="mw-redirect" title="RNA-induced silencing complex">complesso di silenziamento indotto da RNA</a> (RISC) e inducono il <a href="/wiki/RNA_interference#Silenziamento_genico" title="RNA interference">silenziamento genico</a> tramite sovrapposizione con sequenze complementari presenti su molecole di <a href="/wiki/RNA_messaggero" title="RNA messaggero">RNA messaggero</a> (mRNA) bersaglio. Tale legame comporta una repressione della <a href="/wiki/Sintesi_proteica" title="Sintesi proteica">traduzione</a> o la degradazione della molecola bersaglio.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">&#91;</span>1<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid14744438_2-0" class="reference"><a href="#cite_note-pmid14744438-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19167326_3-0" class="reference"><a href="#cite_note-pmid19167326-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> </p><p>Il silenziamento può avvenire secondo i seguenti meccanismi: </p> <ol><li>taglio della molecola di mRNA;</li> <li>destabilizzazione della molecola di mRNA tramite accorciamento della coda di poli(A);</li> <li>diminuzione dell'efficienza di traduzione del messaggero;<sup id="cite_ref-pmid19167326_3-1" class="reference"><a href="#cite_note-pmid19167326-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">&#91;</span>4<span class="cite-bracket">&#93;</span></a></sup></li></ol> <p>Sono presenti in abbondanza in tutti i tipi cellulari dei mammiferi e il <a href="/wiki/Genoma_umano" title="Genoma umano">genoma umano</a> in particolare codifica centinaia di miRNA<sup id="cite_ref-pmid15965474_5-0" class="reference"><a href="#cite_note-pmid15965474-5"><span class="cite-bracket">&#91;</span>5<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-&#39;&#39;&#39;&#39;&#39;&#39;_6-0" class="reference"><a href="#cite_note-&#39;&#39;&#39;&#39;&#39;&#39;-6"><span class="cite-bracket">&#91;</span>6<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid12007417_7-0" class="reference"><a href="#cite_note-pmid12007417-7"><span class="cite-bracket">&#91;</span>7<span class="cite-bracket">&#93;</span></a></sup> Svolgono la loro attività di silenziamento su un'ampia gamma di trascritti derivanti dall'espressione di migliaia di geni.<sup id="cite_ref-Lewis_BP,_Burge_CB,_Bartel_DP_2005_15–20_8-0" class="reference"><a href="#cite_note-Lewis_BP,_Burge_CB,_Bartel_DP_2005_15–20-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid18955434_9-0" class="reference"><a href="#cite_note-pmid18955434-9"><span class="cite-bracket">&#91;</span>9<span class="cite-bracket">&#93;</span></a></sup> L'espressione aberrante dei miRNA è implicata nell'insorgenza di numerose patologie<sup id="cite_ref-pmid19956180_10-0" class="reference"><a href="#cite_note-pmid19956180-10"><span class="cite-bracket">&#91;</span>10<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19876744_11-0" class="reference"><a href="#cite_note-pmid19876744-11"><span class="cite-bracket">&#91;</span>11<span class="cite-bracket">&#93;</span></a></sup> ed essi possono essere utilizzati a scopi terapeutici.<sup id="cite_ref-pmid19896977_12-0" class="reference"><a href="#cite_note-pmid19896977-12"><span class="cite-bracket">&#91;</span>12<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">&#91;</span>13<span class="cite-bracket">&#93;</span></a></sup> </p><p>I miRNA ricordano gli <a href="/wiki/SiRNA" class="mw-redirect" title="SiRNA">siRNA</a> (small interfering RNAs) del pathway biologico dell'interferenza a RNA (<a href="/wiki/RNA_interference" title="RNA interference">RNAi</a>), ma ne differiscono perché derivano da regioni di RNA che si ripiegano autonomamente a formare corte forcine, mentre i siRNA derivano da sequenze di dsRNA più lunghe.<sup id="cite_ref-pmid14744438_2-1" class="reference"><a href="#cite_note-pmid14744438-2"><span class="cite-bracket">&#91;</span>2<span class="cite-bracket">&#93;</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Storia">Storia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=1" title="Modifica la sezione Storia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=1" title="Edit section&#039;s source code: Storia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il primo miRNA fu scoperto nel 1993 da <a href="/wiki/Victor_Ambros" title="Victor Ambros">Victor Ambros</a>, Rosalind Lee e Rhonda Feinbaum in uno studio condotto su lin-4, un gene noto per il controllo esercitato sui tempi di sviluppo larvale di “<a href="/wiki/Caenorhabditis_elegans" title="Caenorhabditis elegans">C. elegans</a>”.<sup id="cite_ref-ref_B_14-0" class="reference"><a href="#cite_note-ref_B-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> Quando isolarono il gene si accorsero che invece di produrre un RNA messaggero generava piccoli filamenti di RNA, uno dei quali era lungo 22 nucleotidi e parzialmente simile a sequenze multiple presenti nella regione 3'UTR dell'mRNA del gene lin-14.<sup id="cite_ref-ref_B_14-1" class="reference"><a href="#cite_note-ref_B-14"><span class="cite-bracket">&#91;</span>14<span class="cite-bracket">&#93;</span></a></sup> Fu proposto per queste molecole appena scoperte un ruolo nel silenziamento dell'espressione genica di lin-14, ma si pensò fosse un prodotto genico caratteristico di “C.elegans”. Nel 2000 fu individuata una seconda piccola molecola di RNA codificata dal gene lin-7 con azione repressiva sull'mRNA del gene lin-41.<sup id="cite_ref-pmid10706289_15-0" class="reference"><a href="#cite_note-pmid10706289-15"><span class="cite-bracket">&#91;</span>15<span class="cite-bracket">&#93;</span></a></sup> Nel corso degli anni furono individuati altri composti simili in numerose specie.<sup id="cite_ref-pmid11081512_16-0" class="reference"><a href="#cite_note-pmid11081512-16"><span class="cite-bracket">&#91;</span>16<span class="cite-bracket">&#93;</span></a></sup> Un anno dopo si riscontrò che gli RNA lin-4 e lin-7 sono parte di una grande classe di piccole molecole di RNA presenti nelle cellule di C.elegans, <i><a href="/wiki/Drosophila" title="Drosophila">Drosophila</a></i> ed “Homo Sapiens”.<sup id="cite_ref-ref_C_17-0" class="reference"><a href="#cite_note-ref_C-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">&#91;</span>18<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ref_A_19-0" class="reference"><a href="#cite_note-ref_A-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup> Inizialmente si pensava che tali molecole fossero coinvolte in processi cellulari specifici inerenti alla regolazione dello sviluppo, ma ne furono scoperti di nuovi tipi. Queste piccole molecole di RNA vennero denominate microRNA.<sup id="cite_ref-ref_A_19-1" class="reference"><a href="#cite_note-ref_A-19"><span class="cite-bracket">&#91;</span>19<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-ref_C_17-1" class="reference"><a href="#cite_note-ref_C-17"><span class="cite-bracket">&#91;</span>17<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">&#91;</span>20<span class="cite-bracket">&#93;</span></a></sup> </p><p>Nel 2024 <a href="/wiki/Victor_Ambros" title="Victor Ambros">Victor Ambros</a> e <a href="/wiki/Gary_Ruvkun" title="Gary Ruvkun">Gary Ruvkun</a> vinsero il <a href="/wiki/Premio_Nobel_per_la_medicina" title="Premio Nobel per la medicina">premio Nobel per la Medicina</a> per la scoperta dei microRNA e la loro funzione cruciale nella regolazione della crescita degli organismi pluricellulari.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">&#91;</span>21<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Nomenclatura">Nomenclatura</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=2" title="Modifica la sezione Nomenclatura" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=2" title="Edit section&#039;s source code: Nomenclatura"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Esiste un sistema di denominazione standard ben preciso per i miRNA. </p><p>I nomi dei miRNA sono rappresentati da un prefisso “miR” seguito da un trattino e un numero, che indica l'ordine di denominazione. Per esempio miR-124 è stato scoperto e denominato prima di miR-456.<sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">&#91;</span>22<span class="cite-bracket">&#93;</span></a></sup> </p><p>I miRNA con sequenze quasi identiche ad eccezione di uno o due nucleotidi sono annotati con un'ulteriore lettera minuscola. Ad esempio, miR-124a è strettamente legato al miR-124b. </p><p>Inoltre miRNA appartenenti a determinate specie sono indicati con un ulteriore prefisso a tre lettere: per esempio hsa-miR-124 è un miRNA appartenente alla specie umana (hsa sta per Homo sapiens),e oar-miR-124 è un miRNA appartenente alla pecora (Ovis aries). Altri prefissi comuni sono 'v' per miRNA virale (miRNA codificati da un genoma virale) e 'D' per miRNA di Drosophila (una mosca della frutta comunemente studiata nella ricerca genetica). </p> <div class="mw-heading mw-heading2"><h2 id="Biogenesi_e_maturazione">Biogenesi e maturazione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=3" title="Modifica la sezione Biogenesi e maturazione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=3" title="Edit section&#039;s source code: Biogenesi e maturazione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Trascrizione">Trascrizione</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=4" title="Modifica la sezione Trascrizione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=4" title="Edit section&#039;s source code: Trascrizione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I miRNA derivano da trascritti di sequenze codificate da geni autonomi oppure inclusi in introni di altri geni. Le sequenze nucleotidiche codificanti i miRNA sono trascritti dalla RNA polimerasi II<sup id="cite_ref-LeeEMBO_23-0" class="reference"><a href="#cite_note-LeeEMBO-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Zhou_2007_24-0" class="reference"><a href="#cite_note-Zhou_2007-24"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> e, in misura minore, dalla RNA polimerasi III. Queste legano un promotore localizzato in prossimità della sequenza codificante. Il trascritto subisce poi un processo di capping al 5', di poliadenilazione al 3' e di splicing.<sup id="cite_ref-LeeEMBO_23-1" class="reference"><a href="#cite_note-LeeEMBO-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Cai_2004_25-0" class="reference"><a href="#cite_note-Cai_2004-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> Negli animali i miRNA sono trascritti come una sequenza stem-loop lunga circa 80 nucleotidi facente parte di una sequenza più lunga denominata pri-miRNA.<sup id="cite_ref-LeeEMBO_23-2" class="reference"><a href="#cite_note-LeeEMBO-23"><span class="cite-bracket">&#91;</span>23<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Zhou_2007_24-1" class="reference"><a href="#cite_note-Zhou_2007-24"><span class="cite-bracket">&#91;</span>24<span class="cite-bracket">&#93;</span></a></sup> Se lo stem-loop precursore è localizzato nella 3'-UTR, il trascritto potrebbe avere sia funzione di pre-RNA, sia di mRNA.<sup id="cite_ref-Cai_2004_25-1" class="reference"><a href="#cite_note-Cai_2004-25"><span class="cite-bracket">&#91;</span>25<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Processamento">Processamento</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=5" title="Modifica la sezione Processamento" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=5" title="Edit section&#039;s source code: Processamento"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Un singolo pri-miRNA può contenere da uno a 6 precursori per miRNA con struttura ad hairpin-loop ognuna delle quali è fiancheggiata da sequenze nucleotidiche necessarie ai fini della maturazione della molecola. Il pri-RNA ha una struttura a doppio filamento riconosciuta dalla proteina del nucleo nota come DiGeorge Syndrome Critical Region 8 (DGCR8 o "Pasha" negli invertebrati) che si associa alla RNAasi di tipo III <a href="/wiki/Drosha" title="Drosha">Drosha</a> a formare il cosiddetto complesso microprocessore.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">&#91;</span>26<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid16957365_27-0" class="reference"><a href="#cite_note-pmid16957365-27"><span class="cite-bracket">&#91;</span>27<span class="cite-bracket">&#93;</span></a></sup> DGCR8 orienta il dominio catalitico di Drosha in modo da consentire all'enzima di tagliare l'RNA a circa 11 residui dall'inizio della forcina. Una delle due eliche del dsRNA andrà a costituire la forcina.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">&#91;</span>28<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">&#91;</span>29<span class="cite-bracket">&#93;</span></a></sup> Il prodotto risultante reca un'estremità sporgente al 3' recante un gruppo idrossile. Al 5' è invece presente un gruppo fosfato. Tale molecola è anche detta miRNA precursore (pre-miRNA). Tali molecole possono derivare dallo splicing diretto degli introni, in maniera indipendente dal complesso microprocessore e prendono il nome di Mirtrons. Tali molecole furono osservate per la prima volta in Drosophila e C.elegans e sono state osservate anche nei mammiferi.<sup id="cite_ref-pmid17964270_30-0" class="reference"><a href="#cite_note-pmid17964270-30"><span class="cite-bracket">&#91;</span>30<span class="cite-bracket">&#93;</span></a></sup> I pre-miRNA possono inoltre subire ulteriori processi di maturazione all'interno del nucleo.<sup id="cite_ref-pmid18684997_31-0" class="reference"><a href="#cite_note-pmid18684997-31"><span class="cite-bracket">&#91;</span>31<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19255566_32-0" class="reference"><a href="#cite_note-pmid19255566-32"><span class="cite-bracket">&#91;</span>32<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17628290_33-0" class="reference"><a href="#cite_note-pmid17628290-33"><span class="cite-bracket">&#91;</span>33<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Esportazione_dal_nucleo">Esportazione dal nucleo</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=6" title="Modifica la sezione Esportazione dal nucleo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=6" title="Edit section&#039;s source code: Esportazione dal nucleo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Al termine del processamento nucleare i pre-miRNA sono esportati nel citoplasma in un processo che coinvolge il trasportatore nucleo-citoplasmatico Esportina-5, il quale riconosce i due nucleotidi sporgenti al 3' lasciati dall'enzima Drosha. Il trasporto del trascritto è attivo e usa quale fonte di energia GTP legato alla proteina Ran.<sup id="cite_ref-pmid15145345_34-0" class="reference"><a href="#cite_note-pmid15145345-34"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Processamento_nel_citoplasma">Processamento nel citoplasma</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=7" title="Modifica la sezione Processamento nel citoplasma" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=7" title="Edit section&#039;s source code: Processamento nel citoplasma"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nel citoplasma i pre-miRNA sono tagliati dalla RNAasi di tipo III Dicer.<sup id="cite_ref-pmid17381281_35-0" class="reference"><a href="#cite_note-pmid17381281-35"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup> L'enzima interagisce con le estremità 5' e 3' delle forcine costituenti i pre-miRNA<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">&#91;</span>36<span class="cite-bracket">&#93;</span></a></sup> tramite il dominio Paz. Il taglio genera molecole di RNA a doppio filamento lunghe circa 22 basi.<sup id="cite_ref-pmid17381281_35-1" class="reference"><a href="#cite_note-pmid17381281-35"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup> La lunghezza dei loop costituenti le forcine influenza l'efficienza di taglio di Dicer.<sup id="cite_ref-pmid17381281_35-2" class="reference"><a href="#cite_note-pmid17381281-35"><span class="cite-bracket">&#91;</span>35<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid18268841_37-0" class="reference"><a href="#cite_note-pmid18268841-37"><span class="cite-bracket">&#91;</span>37<span class="cite-bracket">&#93;</span></a></sup> Successivamente, i miRNA interagiscono in maniera specifica con le proteine <a href="/wiki/Argonaute" title="Argonaute">Argonaute</a> della sottofamiglia Ago e sono incorporati in grandi complessi di ribonucleoproteine effettrici chiamati RISC (<i>RNA-induced silencing complex,</i> complesso di silenziamento indotto da RNA) all'interno dei quali avviene l'interazione tra miRNA ed RNA bersaglio. </p> <div class="mw-heading mw-heading3"><h3 id="Turnover">Turnover</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=8" title="Modifica la sezione Turnover" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=8" title="Edit section&#039;s source code: Turnover"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il turnover del miRNA maturo è necessario al fine di garantire un eventuale rapido cambiamento nei profili di espressione di tali molecole. Durante la maturazione nel citoplasma, il legame con la proteina Argonauta stabilizza il filamento che diventerà funzionale, mentre il filamento opposto viene degradato. Le proteine Ago possono utilizzare o trattenere i miRNA con molti bersagli e mantenere quelli con pochi o nessun bersaglio.<sup id="cite_ref-Assassins_38-0" class="reference"><a href="#cite_note-Assassins-38"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup> In C.elegans la degradazione dei miRNA è mediata dall'esoribonucleasi XRN2.<sup id="cite_ref-Chatterjee_39-0" class="reference"><a href="#cite_note-Chatterjee-39"><span class="cite-bracket">&#91;</span>39<span class="cite-bracket">&#93;</span></a></sup> Nelle piante i membri della famiglia di proteine SDN (small RNA degrading nuclease) degradano i miRNA in direzione 3'- 5'. Proteine simili sono sintetizzate anche nei genomi di animali, ma il loro ruolo non è stato ancora descritto.<sup id="cite_ref-Assassins_38-1" class="reference"><a href="#cite_note-Assassins-38"><span class="cite-bracket">&#91;</span>38<span class="cite-bracket">&#93;</span></a></sup> Molte modifiche chimiche ai miRNA hanno effetto sulla loro stabilità, tuttavia i meccanismi molecolari in gioco non sono ancora del tutto noti. In particolare sono stati identificati miRNA contenenti residui di uracile e miRNA contenenti gruppi metilici legati al 2' ossidrile. La presenza di residui di uracile potrebbe rappresentare un segnale che promuove la degradazione, mentre la metilazione impedirebbe l'aggiunta di uracile e quindi avrebbe un effetto protettivo nei confronti della degradazione. </p> <div class="mw-heading mw-heading2"><h2 id="Il_complesso_di_silenziamento_indotto_da_RNA">Il complesso di silenziamento indotto da RNA</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=9" title="Modifica la sezione Il complesso di silenziamento indotto da RNA" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=9" title="Edit section&#039;s source code: Il complesso di silenziamento indotto da RNA"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I miRNA maturi costituiscono, insieme all'enzima Dicer e altre proteine, l'RNA-induced silencing complex (RISC).<sup id="cite_ref-Rana_40-0" class="reference"><a href="#cite_note-Rana-40"><span class="cite-bracket">&#91;</span>40<span class="cite-bracket">&#93;</span></a></sup> RISC è noto anche come miRNA ribonucleoproteincomplesso (miRNP).<sup id="cite_ref-pmid12000786_41-0" class="reference"><a href="#cite_note-pmid12000786-41"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup> Solo uno dei due filamenti viene incorporato nel complesso di silenziamento all'interno del quale avviene l'interazione tra miRNA ed RNA bersaglio.<sup id="cite_ref-pmid15292246_42-0" class="reference"><a href="#cite_note-pmid15292246-42"><span class="cite-bracket">&#91;</span>42<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid14567918_43-0" class="reference"><a href="#cite_note-pmid14567918-43"><span class="cite-bracket">&#91;</span>43<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid14567917_44-0" class="reference"><a href="#cite_note-pmid14567917-44"><span class="cite-bracket">&#91;</span>44<span class="cite-bracket">&#93;</span></a></sup> La posizione dello stem loop potrebbe influenzare la scelta del filamento funzionale.<sup id="cite_ref-pmid16005165_45-0" class="reference"><a href="#cite_note-pmid16005165-45"><span class="cite-bracket">&#91;</span>45<span class="cite-bracket">&#93;</span></a></sup> L'altro filamento è indicato con un asterisco (*) e, in alcune circostanze, agisce anch'esso da miRNA funzionale su altri RNA bersaglio.<sup id="cite_ref-pmid18769156_46-0" class="reference"><a href="#cite_note-pmid18769156-46"><span class="cite-bracket">&#91;</span>46<span class="cite-bracket">&#93;</span></a></sup> Il ruolo catalitico svolto dalle proteine <a href="/wiki/Argonaute" title="Argonaute">Argonauta</a> è di importanza fondamentale per la normale fisiologia del RISC. Sono proteine del peso di circa 100 kDa contenenti due domini di legame all'RNA altamente conservati (PAZ e PIWI) necessarie per la formazione del complesso di silenziamento indotto da miRNA. Il dominio PAZ lega l'estremità 3' a singolo filamento del miRNA maturo, mentre il dominio PIWI lega l'estremità 5'. Tali interazioni forniscono al miRNA l'orientazione corretta ai fini dell'interazione con la molecola di mRNA bersaglio. Alcune Argonauta, come la proteina umana Ago2, possono tagliare il trascritto bersaglio direttamente.<sup id="cite_ref-Pratt_47-0" class="reference"><a href="#cite_note-Pratt-47"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup> Il genoma umano codifica per 8 proteine Argonauta divise in base alla similarità di sequenza in due famiglie: AGO (4 membri presenti in tutte le cellule di mammifero e denominate E1F2C/hAgo in Homo Sapiens) e PIWI (presenti nelle cellule della linea germinale e nelle cellule staminali emopoietiche).<sup id="cite_ref-pmid12000786_41-1" class="reference"><a href="#cite_note-pmid12000786-41"><span class="cite-bracket">&#91;</span>41<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Pratt_47-1" class="reference"><a href="#cite_note-Pratt-47"><span class="cite-bracket">&#91;</span>47<span class="cite-bracket">&#93;</span></a></sup> Altri componenti del RISC sono TRBP (human immunodeficiency virus (HIV) transactivating response RNA (TAR) binding protein)<sup id="cite_ref-pmid18178619_48-0" class="reference"><a href="#cite_note-pmid18178619-48"><span class="cite-bracket">&#91;</span>48<span class="cite-bracket">&#93;</span></a></sup>, PACT (protein activator of the interferon induced protein kinase), il complesso SMN, FMRP (fragile X mental retardation protein), Tudor-SN (Tudor staphylococcal nuclease-domain-containing protein), la DNA elicasi MOV10 e la proteina contenente motivi di legame all'RNA TNRC6B.<sup id="cite_ref-pmid15145345_34-1" class="reference"><a href="#cite_note-pmid15145345-34"><span class="cite-bracket">&#91;</span>34<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid11914277_49-0" class="reference"><a href="#cite_note-pmid11914277-49"><span class="cite-bracket">&#91;</span>49<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-50" class="reference"><a href="#cite_note-50"><span class="cite-bracket">&#91;</span>50<span class="cite-bracket">&#93;</span></a></sup> Nelle piante il complesso costituito da miRNA e RISC si associa per complementarità perfetta alla CDS degli mRNA bersaglio causandone il taglio, mentre negli animali l'associazione avviene in maniera imperfetta a livello della regione 3'UTR causando un blocco della traduzione dell'mRNA messaggero e successiva degradazione. </p> <div class="mw-heading mw-heading3"><h3 id="Modalità_di_silenziamento"><span id="Modalit.C3.A0_di_silenziamento"></span>Modalità di silenziamento</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=10" title="Modifica la sezione Modalità di silenziamento" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=10" title="Edit section&#039;s source code: Modalità di silenziamento"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Il silenziamento genico può avvenire sia tramite degradazione dell'mRNA sia tramite blocco della traduzione. Ad esempio, miR16 contiene una sequenza complementare ricca in AU riscontrata in molti mRNA funzionali.<sup id="cite_ref-Jing_Q,_Huang_S,_Guth_S,_Zarubin_T,_Motoyama_A,_Chen_J,_Di_Padova_F,_Lin_SC,_Gram_H,_Han_J_2005_623-34_51-0" class="reference"><a href="#cite_note-Jing_Q,_Huang_S,_Guth_S,_Zarubin_T,_Motoyama_A,_Chen_J,_Di_Padova_F,_Lin_SC,_Gram_H,_Han_J_2005_623-34-51"><span class="cite-bracket">&#91;</span>51<span class="cite-bracket">&#93;</span></a></sup> È stato dimostrato che se c'è sovrapposizione completa tra il miRNA e il messaggero bersaglio, la proteina Ago2 può tagliare l'mRNA e portare alla sua degradazione. Se invece non c'è una sovrapposizione completa il silenziamento avviene tramite blocco della traduzione.<sup id="cite_ref-pmid15685193_52-0" class="reference"><a href="#cite_note-pmid15685193-52"><span class="cite-bracket">&#91;</span>52<span class="cite-bracket">&#93;</span></a></sup> La relazione tra miRNA e messaggero target può essere basata sulla semplice regolazione negativa, ma sembra che siano possibili altri meccanismi.<sup id="cite_ref-Musilova_K,_Mraz_M_2014_53-0" class="reference"><a href="#cite_note-Musilova_K,_Mraz_M_2014-53"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> È stato inoltre dimostrato che alcuni miRNA lavorano quali regolatori della corretta espressione genica in risposta all'eventuale espressione casuale di geni dovuta a ad eventi stocastici di trascrizione e traduzione.<sup id="cite_ref-Musilova_K,_Mraz_M_2014_53-1" class="reference"><a href="#cite_note-Musilova_K,_Mraz_M_2014-53"><span class="cite-bracket">&#91;</span>53<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Evoluzione">Evoluzione</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=11" title="Modifica la sezione Evoluzione" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=11" title="Edit section&#039;s source code: Evoluzione"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I miRNA risultano essere evolutivamente molto conservati e si pensa siano elementi molto antichi dei meccanismi di regolazione dell'espressione genica. Le molecole costituenti i loro sistemi di espressione risultano essere simili nelle piante e negli animali, ma vi sono delle differenze inerenti ai loro meccanismi di espressione.<sup id="cite_ref-pmid18715673_54-0" class="reference"><a href="#cite_note-pmid18715673-54"><span class="cite-bracket">&#91;</span>54<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-55" class="reference"><a href="#cite_note-55"><span class="cite-bracket">&#91;</span>55<span class="cite-bracket">&#93;</span></a></sup> I miRNA delle piante presentano sequenze perfettamente complementari all'RNA bersaglio e inducono il silenziamento genico tramite taglio di quest'ultimo.<sup id="cite_ref-ReferenceA_56-0" class="reference"><a href="#cite_note-ReferenceA-56"><span class="cite-bracket">&#91;</span>56<span class="cite-bracket">&#93;</span></a></sup> I miRNA animali, invece, sono in grado di riconoscere il messaggero bersaglio tramite 6-8 nucleotidi localizzati al 5' della sequenza.<sup id="cite_ref-Lewis_BP,_Burge_CB,_Bartel_DP_2005_15–20_8-1" class="reference"><a href="#cite_note-Lewis_BP,_Burge_CB,_Bartel_DP_2005_15–20-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Lewis_BP,_Shih_IH,_Jones-Rhoades_M,_Bartel_DP,_Burge_CB_2003_787–798_57-0" class="reference"><a href="#cite_note-Lewis_BP,_Shih_IH,_Jones-Rhoades_M,_Bartel_DP,_Burge_CB_2003_787–798-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup> La similarità di struttura non è sufficiente ad innescare il taglio della molecola di mRNA.<sup id="cite_ref-pmid19167326_3-2" class="reference"><a href="#cite_note-pmid19167326-3"><span class="cite-bracket">&#91;</span>3<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Funzioni">Funzioni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=12" title="Modifica la sezione Funzioni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=12" title="Edit section&#039;s source code: Funzioni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I miRNA regolano l'espressione genica secondo meccanismi diversi nelle piante e negli animali. Nelle piante i miRNA si appaiano in maniera perfetta all'mRNA bersaglio, provocando il taglio di quest'ultimo. L'appaiamento perfetto tra miRNA ed mRNA promuove la degradazione del messaggero. Questa è la principale modalità di silenziamento nelle piante.<sup id="cite_ref-58" class="reference"><a href="#cite_note-58"><span class="cite-bracket">&#91;</span>58<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-59" class="reference"><a href="#cite_note-59"><span class="cite-bracket">&#91;</span>59<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Moxon2008_60-0" class="reference"><a href="#cite_note-Moxon2008-60"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> Negli animali i miRNA hanno solo una parziale similarità di sequenza con il trascritto bersaglio. L'appaiamento è dunque imperfetto e coinvolge pochi nucleotidi.<sup id="cite_ref-Lewis_BP,_Burge_CB,_Bartel_DP_2005_15–20_8-2" class="reference"><a href="#cite_note-Lewis_BP,_Burge_CB,_Bartel_DP_2005_15–20-8"><span class="cite-bracket">&#91;</span>8<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-Lewis_BP,_Shih_IH,_Jones-Rhoades_M,_Bartel_DP,_Burge_CB_2003_787–798_57-1" class="reference"><a href="#cite_note-Lewis_BP,_Shih_IH,_Jones-Rhoades_M,_Bartel_DP,_Burge_CB_2003_787–798-57"><span class="cite-bracket">&#91;</span>57<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-61" class="reference"><a href="#cite_note-61"><span class="cite-bracket">&#91;</span>61<span class="cite-bracket">&#93;</span></a></sup> Il silenziamento dell'espressione genica avviene per inibizione della sintesi proteica.<sup id="cite_ref-62" class="reference"><a href="#cite_note-62"><span class="cite-bracket">&#91;</span>62<span class="cite-bracket">&#93;</span></a></sup> Questo meccanismo esiste anche nelle piante, ma è meno comune.<sup id="cite_ref-Moxon2008_60-1" class="reference"><a href="#cite_note-Moxon2008-60"><span class="cite-bracket">&#91;</span>60<span class="cite-bracket">&#93;</span></a></sup> I miRNA parzialmente complementari ad un bersaglio possono inoltre aumentare la velocità di deadenilazione dello stesso provocando una più rapida degradazione del trascritto.<sup id="cite_ref-63" class="reference"><a href="#cite_note-63"><span class="cite-bracket">&#91;</span>63<span class="cite-bracket">&#93;</span></a></sup> Il meccanismo di taglio dell'miRNA è ben documentato, mentre vi sono pochissimi dati inerenti al silenziamento per repressione della traduzione, per aumentata degradazione e per loro combinazione.<sup id="cite_ref-pmid22422859_64-0" class="reference"><a href="#cite_note-pmid22422859-64"><span class="cite-bracket">&#91;</span>64<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid22499947_65-0" class="reference"><a href="#cite_note-pmid22499947-65"><span class="cite-bracket">&#91;</span>65<span class="cite-bracket">&#93;</span></a></sup> I miRNA possono raramente essere causa di modifiche agli istoni e di metilazione del DNA a livello di specifici siti di promozione dell'espressione genica.<sup id="cite_ref-pmid19232136_66-0" class="reference"><a href="#cite_note-pmid19232136-66"><span class="cite-bracket">&#91;</span>66<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid18256543_67-0" class="reference"><a href="#cite_note-pmid18256543-67"><span class="cite-bracket">&#91;</span>67<span class="cite-bracket">&#93;</span></a></sup> </p><p>Sono stati descritti 9 meccanismi di silenziamento indotti da miRNA<sup id="cite_ref-Zinovyev_2012_68-0" class="reference"><a href="#cite_note-Zinovyev_2012-68"><span class="cite-bracket">&#91;</span>68<span class="cite-bracket">&#93;</span></a></sup>: </p> <ol><li>Inibizione della formazione del Cap-40S;</li> <li>Inibizione dell'unione della subunità 60S al ribosoma;</li> <li>Inibizione dell'allungamento della sequenza;</li> <li>Terminazione prematura della traduzione (Ribosome drop-off);</li> <li>Degradazione proteica in fase di traduzione;</li> <li>Sequestro nei P-bodies;</li> <li>Destabilizzazione dell'mRNA bersaglio;</li> <li>Taglio dell'mRNA bersaglio;</li> <li>Inibizione della trascrizione tramite rimodellamento della cromatina indotta da miRNA;</li></ol> <p>Tali meccanismi presentano dinamiche e cinetiche caratteristiche.<sup id="cite_ref-Zinovyev_2012_68-1" class="reference"><a href="#cite_note-Zinovyev_2012-68"><span class="cite-bracket">&#91;</span>68<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Patologie_correlate">Patologie correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=13" title="Modifica la sezione Patologie correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=13" title="Edit section&#039;s source code: Patologie correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Le alterazioni del normale pathway di espressione dei miRNA possono avere conseguenze sulla normale fisiologia cellulare e portare a diversi tipi di patologie. Molti miRNA sono stai associati a varie forme di cancro (si fa riferimento a queste molecole come oncomiR).<sup id="cite_ref-pmid17426780_69-0" class="reference"><a href="#cite_note-pmid17426780-69"><span class="cite-bracket">&#91;</span>69<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19347736_70-0" class="reference"><a href="#cite_note-pmid19347736-70"><span class="cite-bracket">&#91;</span>70<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Neoplasie">Neoplasie</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=14" title="Modifica la sezione Neoplasie" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=14" title="Edit section&#039;s source code: Neoplasie"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>La prima patologia umana associata ad alterazioni dei pathway dei miRNA è stata la leucemia linfatica cronica.<sup id="cite_ref-pmid17426780_69-1" class="reference"><a href="#cite_note-pmid17426780-69"><span class="cite-bracket">&#91;</span>69<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid23216588_71-0" class="reference"><a href="#cite_note-pmid23216588-71"><span class="cite-bracket">&#91;</span>71<span class="cite-bracket">&#93;</span></a></sup> Quest'ultima potrebbe essere causata dall'inserzione di un tratto di sequenza di genoma virale nei miRNA con conseguente aumento della sua espressione.<sup id="cite_ref-72" class="reference"><a href="#cite_note-72"><span class="cite-bracket">&#91;</span>72<span class="cite-bracket">&#93;</span></a></sup> Un altro studio ha riscontrato che due tipi di miRNA inibiscono la proteina E2F1, la quale regola la proliferazione cellulare. Sembra che il messaggero venga silenziato prima della traduzione.<sup id="cite_ref-73" class="reference"><a href="#cite_note-73"><span class="cite-bracket">&#91;</span>73<span class="cite-bracket">&#93;</span></a></sup> Misurando l'attività dei geni codificanti per i miRNA è possibile distinguere tra i diversi tipi di cancro.<sup id="cite_ref-pmid15944708_74-0" class="reference"><a href="#cite_note-pmid15944708-74"><span class="cite-bracket">&#91;</span>74<span class="cite-bracket">&#93;</span></a></sup> Il profilo di espressione dei miRNA permette di diagnosticare la leucemia linfatica cronica.<sup id="cite_ref-pmid19347736_70-1" class="reference"><a href="#cite_note-pmid19347736-70"><span class="cite-bracket">&#91;</span>70<span class="cite-bracket">&#93;</span></a></sup> Studi condotti su topi transgenici che sovraesprimono o mancano di specifici miRNA hanno consentito di determinare il ruolo di queste piccole molecole di RNA in varie forme di neoplasia.<sup id="cite_ref-pmid21666870_75-0" class="reference"><a href="#cite_note-pmid21666870-75"><span class="cite-bracket">&#91;</span>75<span class="cite-bracket">&#93;</span></a></sup> È possibile utilizzare i livelli di espressione di specifici miRNA per scopi prognostici. Ad esempio, uno studio condotto su un campione di cellule affetto da carcinoma polmonare non microcitico ha riscontrato che bassi livelli di miR-324a sono indice di scarsa sopravvivenza.<sup id="cite_ref-pmid21748820_76-0" class="reference"><a href="#cite_note-pmid21748820-76"><span class="cite-bracket">&#91;</span>76<span class="cite-bracket">&#93;</span></a></sup> Invece, alti livelli di miR-185 o bassi livelli di miR-133B sono indice di metastasi e scarsa sopravvivenza in cellule neoplastiche di colon e retto.<sup id="cite_ref-pmid21573504_77-0" class="reference"><a href="#cite_note-pmid21573504-77"><span class="cite-bracket">&#91;</span>77<span class="cite-bracket">&#93;</span></a></sup> La proliferazione delle cellule tumorali epatiche può aumentare per interazione di miR-21 con MAP2K3, un gene in grado di reprimere lo sviluppo neoplastico. miR-205, invece, è in grado di inibire la tendenza allo sviluppo di metastasi del tumore della mammella.<sup id="cite_ref-pmid19839716_78-0" class="reference"><a href="#cite_note-pmid19839716-78"><span class="cite-bracket">&#91;</span>78<span class="cite-bracket">&#93;</span></a></sup> In questo tipo di neoplasia è stato riscontrato un calo dei livelli di espressione di cinque membri della famiglia miRNA-200.<sup id="cite_ref-pmid18376396_79-0" class="reference"><a href="#cite_note-pmid18376396-79"><span class="cite-bracket">&#91;</span>79<span class="cite-bracket">&#93;</span></a></sup> Il MicroRNA-197-3p è un potenziale biomarcatore dell'esposizione all'amianto<sup id="cite_ref-80" class="reference"><a href="#cite_note-80"><span class="cite-bracket">&#91;</span>80<span class="cite-bracket">&#93;</span></a></sup>. </p> <div class="mw-heading mw-heading3"><h3 id="Malattie_cardiache">Malattie cardiache</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=15" title="Modifica la sezione Malattie cardiache" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=15" title="Edit section&#039;s source code: Malattie cardiache"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Studi condotti sul cuore di topi, nei quali era stata indotta l'inibizione della maturazione dei miRNA, hanno rivelato il ruolo essenziale svolto da queste molecole nello sviluppo dell'organo.<sup id="cite_ref-pmid18256189_81-0" class="reference"><a href="#cite_note-pmid18256189-81"><span class="cite-bracket">&#91;</span>81<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-2007-Zhao_82-0" class="reference"><a href="#cite_note-2007-Zhao-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup> I livelli di espressione di determinati miRNA subiscono delle modifiche nelle cardiomiopatie.<sup id="cite_ref-pmid17606841_83-0" class="reference"><a href="#cite_note-pmid17606841-83"><span class="cite-bracket">&#91;</span>83<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17108080_84-0" class="reference"><a href="#cite_note-pmid17108080-84"><span class="cite-bracket">&#91;</span>84<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17498736_85-0" class="reference"><a href="#cite_note-pmid17498736-85"><span class="cite-bracket">&#91;</span>85<span class="cite-bracket">&#93;</span></a></sup> Vi sono specifici miRNA con ruoli diversi in vari processi dello sviluppo e della fisiologia della cellula.<sup id="cite_ref-2007-Zhao_82-1" class="reference"><a href="#cite_note-2007-Zhao-82"><span class="cite-bracket">&#91;</span>82<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-86" class="reference"><a href="#cite_note-86"><span class="cite-bracket">&#91;</span>86<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17344217_87-0" class="reference"><a href="#cite_note-pmid17344217-87"><span class="cite-bracket">&#91;</span>87<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17401374_88-0" class="reference"><a href="#cite_note-pmid17401374-88"><span class="cite-bracket">&#91;</span>88<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17468766_89-0" class="reference"><a href="#cite_note-pmid17468766-89"><span class="cite-bracket">&#91;</span>89<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid17379774_90-0" class="reference"><a href="#cite_note-pmid17379774-90"><span class="cite-bracket">&#91;</span>90<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Sistema_nervoso">Sistema nervoso</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=16" title="Modifica la sezione Sistema nervoso" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=16" title="Edit section&#039;s source code: Sistema nervoso"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>I miRNA potrebbero essere implicati nei processi regolativi dello sviluppo del sistema nervoso.<sup id="cite_ref-91" class="reference"><a href="#cite_note-91"><span class="cite-bracket">&#91;</span>91<span class="cite-bracket">&#93;</span></a></sup> Si pensa che miR-132, miR-134 e miR-124 siano coinvolti nei meccanismi di sviluppo dei dendriti, mentre miR-134 e miR-138 sarebbero implicati nei processi di maturazione delle sinapsi.<sup id="cite_ref-pmid19888283_92-0" class="reference"><a href="#cite_note-pmid19888283-92"><span class="cite-bracket">&#91;</span>92<span class="cite-bracket">&#93;</span></a></sup> Alcuni studi hanno riscontrato delle alterazioni nei livelli di espressione di specifici miRNA in patologie quali la schizofrenia, il disturbo bipolare e il disturbo depressivo.<sup id="cite_ref-Hommers_LG,_Domschke_K,_Deckert_J_2015_79-97_93-0" class="reference"><a href="#cite_note-Hommers_LG,_Domschke_K,_Deckert_J_2015_79-97-93"><span class="cite-bracket">&#91;</span>93<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19568434_94-0" class="reference"><a href="#cite_note-pmid19568434-94"><span class="cite-bracket">&#91;</span>94<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-pmid19721432_95-0" class="reference"><a href="#cite_note-pmid19721432-95"><span class="cite-bracket">&#91;</span>95<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Diabete">Diabete</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=17" title="Modifica la sezione Diabete" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=17" title="Edit section&#039;s source code: Diabete"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Recenti ricerche in ambito biomedico hanno evidenziato che miR-375, espresso in maniera specifica nelle cellule pancreatiche, è essenziale per la sopravvivenza, la crescita e la divisione delle <a href="/wiki/Cellule_%CE%B2" title="Cellule β">cellule β</a>, mentre induce un aumento della massa delle cellule&#160;α. miR-375 inoltre influenza i processi di regolazione della secrezione di insulina influenzando l'espressione dei geni Mtpn e Pdk1. miR-375 gioca un ruolo importante nel complesso meccanismo di regolazione dello sviluppo pancreatico. Si pensa possa regolare l'espressione di geni quali NeuroD1, Ngn3, Pdx1 e Hnf6.<sup id="cite_ref-pmid24120394_96-0" class="reference"><a href="#cite_note-pmid24120394-96"><span class="cite-bracket">&#91;</span>96<span class="cite-bracket">&#93;</span></a></sup> È stato inoltre scoperto un legame tra il trascritto in questione e il diabete mellito di tipo 2<sup id="cite_ref-97" class="reference"><a href="#cite_note-97"><span class="cite-bracket">&#91;</span>97<span class="cite-bracket">&#93;</span></a></sup>. La sua espressione nelle cellule di topi obesi è maggiore rispetto a topi normali. La rimozione del gene codificante per miR-375 dal genoma delle cellule pancreatiche dei topi obesi causa una diminuzione della massa di cellule β e lo sviluppo della malattia.<sup id="cite_ref-pmid19289822_98-0" class="reference"><a href="#cite_note-pmid19289822-98"><span class="cite-bracket">&#91;</span>98<span class="cite-bracket">&#93;</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Danno_d'organo"><span id="Danno_d.27organo"></span>Danno d'organo</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=18" title="Modifica la sezione Danno d&#039;organo" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=18" title="Edit section&#039;s source code: Danno d&#039;organo"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Varie ricerche<sup id="cite_ref-99" class="reference"><a href="#cite_note-99"><span class="cite-bracket">&#91;</span>99<span class="cite-bracket">&#93;</span></a></sup><sup id="cite_ref-:0_100-0" class="reference"><a href="#cite_note-:0-100"><span class="cite-bracket">&#91;</span>100<span class="cite-bracket">&#93;</span></a></sup> hanno dimostrato il coinvolgimento di alcuni microRNA in vari processi legati al danno d'organo, come la regolazione della risposta cellulare al danno e la rigenerazione tissutale. Alcuni studi hanno successivamente valutato in maniera positiva un utilizzo dei miRNA sia a scopo diagnostico<sup id="cite_ref-101" class="reference"><a href="#cite_note-101"><span class="cite-bracket">&#91;</span>101<span class="cite-bracket">&#93;</span></a></sup> che terapeutico<sup id="cite_ref-:0_100-1" class="reference"><a href="#cite_note-:0-100"><span class="cite-bracket">&#91;</span>100<span class="cite-bracket">&#93;</span></a></sup>. </p> <div class="mw-heading mw-heading2"><h2 id="Note">Note</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=19" title="Modifica la sezione Note" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=19" title="Edit section&#039;s source code: Note"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Ambros V, <a rel="nofollow" class="external text" href="https://oadoi.org/10.1038/nature02871"><span style="font-style:italic;">The functions of animal microRNAs</span></a>, in <span style="font-style:italic;">Nature</span>, vol.&#160;431, n.&#160;7006, Settembre 2004, pp.&#160;350–5, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1038%2Fnature02871">10.1038/nature02871</a>, <a href="/wiki/PMID" title="PMID">PMID</a>&#160;<a rel="nofollow" class="external text" href="//www.ncbi.nlm.nih.gov/pubmed/15372042">15372042</a>.</cite></span> </li> <li id="cite_note-pmid14744438-2"><span 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href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2612969"><span style="font-style:italic;">Most mammalian mRNAs are conserved targets of microRNAs</span></a>, in <span style="font-style:italic;">Genome Res.</span>, vol.&#160;19, n.&#160;1, Gennaio 2009, pp.&#160;92–105, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1101%2Fgr.082701.108">10.1101/gr.082701.108</a>, <a href="/wiki/PubMed" title="PubMed">PMC</a>&#160;<a rel="nofollow" class="external text" href="//www.ncbi.nlm.nih.gov/pmc/articles/PMC2612969">2612969</a>, <a href="/wiki/PMID" title="PMID">PMID</a>&#160;<a rel="nofollow" class="external text" href="//www.ncbi.nlm.nih.gov/pubmed/18955434">18955434</a>.</cite></span> </li> <li id="cite_note-pmid19956180-10"><a href="#cite_ref-pmid19956180_10-0"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Trang P, Weidhaas JB, 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Heggermont e Stephane Heymans, <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pubmed/22987922"><span style="font-style:italic;">MicroRNAs are involved in end-organ damage during hypertension</span></a>, in <span style="font-style:italic;">Hypertension (Dallas, Tex.: 1979)</span>, vol.&#160;60, n.&#160;5, 2012-11, pp.&#160;1088–1093, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1161%2FHYPERTENSIONAHA.111.187104">10.1161/HYPERTENSIONAHA.111.187104</a>. <small>URL consultato il 16 luglio 2018</small>.</cite></span> </li> <li id="cite_note-101"><a href="#cite_ref-101"><b>^</b></a> <span class="reference-text"><cite class="citation pubblicazione" style="font-style:normal"> Francis S. Wolenski, Pooja Shah e Tomoya Sano, <a rel="nofollow" class="external text" href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5298042/"><span style="font-style:italic;">Identification of microRNA biomarker candidates in urine and plasma from rats with kidney or liver damage</span></a>, in <span style="font-style:italic;">Journal of Applied Toxicology</span>, vol.&#160;37, n.&#160;3, 2017-3, pp.&#160;278–286, <a href="/wiki/Digital_object_identifier" title="Digital object identifier">DOI</a>:<a rel="nofollow" class="external text" href="https://dx.doi.org/10.1002%2Fjat.3358">10.1002/jat.3358</a>. <small>URL consultato il 16 luglio 2018</small>.</cite></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="Bibliografia">Bibliografia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=20" title="Modifica la sezione Bibliografia" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=20" title="Edit section&#039;s source code: Bibliografia"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>Bartel, D.P. (2004). MicroRNAs: genomics, biogenesis, mechanism, and function. Cell 116, 281-297</li> <li>Shyu, AB et All. (2008). Messenger RNA regulation: to translate or to degrade. Embo J. 27, 471-481t</li> <li>NCBI, Biosystem, MicroRNA (miRNA) biogenesis, <a rel="nofollow" class="external free" href="https://www.ncbi.nlm.nih.gov/biosystems/106335">https://www.ncbi.nlm.nih.gov/biosystems/106335</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Voci_correlate">Voci correlate</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=21" title="Modifica la sezione Voci correlate" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=21" title="Edit section&#039;s source code: Voci correlate"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Dicer" class="mw-redirect" title="Dicer">Dicer</a></li> <li><a href="/wiki/RNA_interference" title="RNA interference">RNA interference</a></li> <li><a href="/wiki/ShRNA" class="mw-redirect" title="ShRNA">shRNA</a></li> <li><a href="/wiki/SiRNA" class="mw-redirect" title="SiRNA">siRNA</a></li> <li><a href="/wiki/MRNA" class="mw-redirect" title="MRNA">mRNA</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Altri_progetti">Altri progetti</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=22" title="Modifica la sezione Altri progetti" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=22" title="Edit section&#039;s source code: Altri progetti"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <div id="interProject" class="toccolours" style="display: none; clear: both; margin-top: 2em"><p id="sisterProjects" style="background-color: #efefef; color: black; font-weight: bold; margin: 0"><span>Altri progetti</span></p><ul title="Collegamenti verso gli altri progetti Wikimedia"> <li class="" title=""><span class="plainlinks" title="commons:Category:MicroRNAs"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:MicroRNAs?uselang=it">Wikimedia Commons</a></span></li></ul></div> <ul><li><span typeof="mw:File"><a href="https://commons.wikimedia.org/wiki/?uselang=it" title="Collabora a Wikimedia Commons"><img alt="Collabora a Wikimedia Commons" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png" decoding="async" width="18" height="24" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/27px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/36px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/?uselang=it">Wikimedia Commons</a></span> contiene immagini o altri file su <b><span class="plainlinks"><a class="external text" href="https://commons.wikimedia.org/wiki/Category:MicroRNAs?uselang=it">MicroRNA</a></span></b></li></ul> <div class="mw-heading mw-heading2"><h2 id="Collegamenti_esterni">Collegamenti esterni</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=MicroRNA&amp;veaction=edit&amp;section=23" title="Modifica la sezione Collegamenti esterni" class="mw-editsection-visualeditor"><span>modifica</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=MicroRNA&amp;action=edit&amp;section=23" title="Edit section&#039;s source code: Collegamenti esterni"><span>modifica wikitesto</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li class="mw-empty-elt"></li> <li><cite id="CITEREFBritannica.com" class="citation web" style="font-style:normal">(<span style="font-weight:bolder; font-size:80%"><abbr title="inglese">EN</abbr></span>) <a rel="nofollow" class="external text" href="https://www.britannica.com/topic/microRNA"><span style="font-style:italic;">microRNA</span></a>, su <span style="font-style:italic;"><a href="/wiki/Enciclopedia_Britannica" title="Enciclopedia Britannica">Enciclopedia Britannica</a></span>, Encyclopædia Britannica, Inc.</cite> <span class="mw-valign-text-top noprint" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q310899#P1417" title="Modifica su Wikidata"><img alt="Modifica su Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/10px-Blue_pencil.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/15px-Blue_pencil.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/73/Blue_pencil.svg/20px-Blue_pencil.svg.png 2x" data-file-width="600" data-file-height="600" /></a></span></li></ul> <style data-mw-deduplicate="TemplateStyles:r141815314">.mw-parser-output .navbox{border:1px solid #aaa;clear:both;margin:auto;padding:2px;width:100%}.mw-parser-output .navbox th{padding-left:1em;padding-right:1em;text-align:center}.mw-parser-output .navbox>tbody>tr:first-child>th{background:#ccf;font-size:90%;width:100%;color:var(--color-base,black)}.mw-parser-output .navbox_navbar{float:left;margin:0;padding:0 10px 0 0;text-align:left;width:6em}.mw-parser-output .navbox_title{font-size:110%}.mw-parser-output .navbox_abovebelow{background:#ddf;font-size:90%;font-weight:normal}.mw-parser-output .navbox_group{background:#ddf;font-size:90%;padding:0 10px;white-space:nowrap}.mw-parser-output .navbox_list{font-size:90%;width:100%}.mw-parser-output .navbox_list a{white-space:nowrap}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_odd{background:#fdfdfd;color:var(--color-base,black)}html:not(.vector-feature-night-mode-enabled) .mw-parser-output .navbox_even{background:#f7f7f7;color:var(--color-base,black)}.mw-parser-output .navbox a.mw-selflink{color:var(--color-base,black)}.mw-parser-output .navbox_center{text-align:center}.mw-parser-output .navbox .navbox_image{padding-left:7px;vertical-align:middle;width:0}.mw-parser-output .navbox+.navbox{margin-top:-1px}.mw-parser-output .navbox .mw-collapsible-toggle{font-weight:normal;text-align:right;width:7em}body.skin--responsive .mw-parser-output .navbox_image img{max-width:none!important}.mw-parser-output .subnavbox{margin:-3px;width:100%}.mw-parser-output .subnavbox_group{background:#e6e6ff;padding:0 10px}@media screen{html.skin-theme-clientpref-night .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-night .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-night .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-night .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbox>tbody>tr:first-child>th{background:var(--background-color-interactive)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox th{color:var(--color-base)!important}html.skin-theme-clientpref-os .mw-parser-output .navbox_abovebelow,html.skin-theme-clientpref-os .mw-parser-output .navbox_group{background:var(--background-color-interactive-subtle)!important}html.skin-theme-clientpref-os .mw-parser-output .subnavbox_group{background:var(--background-color-neutral-subtle)!important}}</style><table class="navbox mw-collapsible autocollapse noprint metadata" id="navbox-Acidi_nucleiciNucleotide"><tbody><tr><th colspan="2"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/w/index.php?title=Template:Acidi_nucleiciNucleotide&amp;action=edit&amp;redlink=1" class="new" title="Template:Acidi nucleiciNucleotide (la pagina non esiste)"><span title="Vai alla pagina del template">V</span></a>&#160;·&#160;<a href="/w/index.php?title=Discussioni_template:Acidi_nucleiciNucleotide&amp;action=edit&amp;redlink=1" class="new" title="Discussioni template:Acidi nucleiciNucleotide (la pagina non esiste)"><span title="Discuti del template">D</span></a>&#160;·&#160;<a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Acidi_nucleiciNucleotide&amp;action=edit"><span title="Modifica il template. Usa l&#39;anteprima prima di salvare">M</span></a></div></div><span class="navbox_title"><a href="/wiki/Basi_azotate" class="mw-redirect" title="Basi azotate">Basi azotate</a>, <a href="/wiki/Acidi_nucleici" title="Acidi nucleici">acidi nucleici</a>, <a href="/wiki/Oligonucleotide" title="Oligonucleotide">oligonucleotidi</a> e <a href="/wiki/Nucleotide" title="Nucleotide">nucleotidi</a></span></th></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Basi_azotate" class="mw-redirect" title="Basi azotate">Basi azotate</a></th><td colspan="1" class="navbox_list navbox_odd" style="text-align:left;"><a href="/wiki/Adenina" title="Adenina">Adenina</a> • <a href="/wiki/Timina" title="Timina">Timina</a> • <a href="/wiki/Uracile" title="Uracile">Uracile</a> • <a href="/wiki/Guanina" title="Guanina">Guanina</a> • <a href="/wiki/Citosina" title="Citosina">Citosina</a> • <a href="/wiki/Purina" title="Purina">Purina</a> • <a href="/wiki/Pirimidina" title="Pirimidina">Pirimidina</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Nucleosidi" class="mw-redirect" title="Nucleosidi">Nucleosidi</a></th><td colspan="1" class="navbox_list navbox_even" style="text-align:left;"><a href="/wiki/Adenosina" title="Adenosina">Adenosina</a> • <a href="/wiki/Timidina" title="Timidina">Timidina</a> • <a href="/wiki/Uridina" title="Uridina">Uridina</a> • <a href="/wiki/Guanosina" title="Guanosina">Guanosina</a> • <a href="/wiki/Citidina" title="Citidina">Citidina</a> • <a href="/w/index.php?title=Ribonucleoside&amp;action=edit&amp;redlink=1" class="new" title="Ribonucleoside (la pagina non esiste)">Ribonucleoside</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Deossinucleosidi" class="mw-redirect" title="Deossinucleosidi">Deossinucleosidi</a></th><td colspan="1" class="navbox_list navbox_odd" style="text-align:left;"><a href="/wiki/Deossiadenosina" title="Deossiadenosina">Deossiadenosina</a> • <a href="/wiki/Deossitimidina" class="mw-redirect" title="Deossitimidina">Deossitimidina</a> • <a href="/wiki/Deossiuridina" title="Deossiuridina">Deossiuridina</a> • <a href="/wiki/Deossiguanosina" title="Deossiguanosina">Deossiguanosina</a> • <a href="/wiki/Deossicitidina" title="Deossicitidina">Deossicitidina</a> • <a href="/w/index.php?title=Deossiribonucleoside&amp;action=edit&amp;redlink=1" class="new" title="Deossiribonucleoside (la pagina non esiste)">Deossiribonucleoside</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Nucleotidi" class="mw-redirect" title="Nucleotidi">Nucleotidi</a></th><td colspan="1" class="navbox_list navbox_even" style="text-align:left;"><a href="/wiki/Adenosinmonofosfato" class="mw-redirect" title="Adenosinmonofosfato">AMP</a> • <a href="/wiki/Uridinmonofosfato" class="mw-redirect" title="Uridinmonofosfato">UMP</a> • <a href="/wiki/Guanosinmonofosfato" class="mw-redirect" title="Guanosinmonofosfato">GMP</a> • <a href="/wiki/Citidinmonofosfato" title="Citidinmonofosfato">CMP</a> • <a href="/wiki/Adenosindifosfato" class="mw-redirect" title="Adenosindifosfato">ADP</a> • <a href="/wiki/Uridindifosfato" class="mw-redirect" title="Uridindifosfato">UDP</a> • <a href="/wiki/Guanosindifosfato" title="Guanosindifosfato">GDP</a> • <a href="/wiki/Citidindifosfato" title="Citidindifosfato">CDP</a> • <a href="/wiki/Adenosintrifosfato" class="mw-redirect" title="Adenosintrifosfato">ATP</a> • <a href="/wiki/Uridintrifosfato" title="Uridintrifosfato">UTP</a> • <a href="/wiki/Guanosintrifosfato" title="Guanosintrifosfato">GTP</a> • <a href="/wiki/Citidintrifosfato" title="Citidintrifosfato">CTP</a> • <a href="/wiki/Adenosina_monofosfato_ciclico" title="Adenosina monofosfato ciclico">cAMP</a> • <a href="/wiki/Guanosina_monofosfato_ciclico" title="Guanosina monofosfato ciclico">cGMP</a> • <a href="/w/index.php?title=ADP_riboso_ciclico&amp;action=edit&amp;redlink=1" class="new" title="ADP riboso ciclico (la pagina non esiste)">cADPR</a> • <a href="/wiki/Ribonucleotide" title="Ribonucleotide">Ribonucleotide</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/w/index.php?title=Deossinucleotidi&amp;action=edit&amp;redlink=1" class="new" title="Deossinucleotidi (la pagina non esiste)">Deossinucleotidi</a></th><td colspan="1" class="navbox_list navbox_odd" style="text-align:left;"><a href="/w/index.php?title=DAMP&amp;action=edit&amp;redlink=1" class="new" title="DAMP (la pagina non esiste)">dAMP</a> • <a href="/w/index.php?title=DTMP&amp;action=edit&amp;redlink=1" class="new" title="DTMP (la pagina non esiste)">dTMP</a> • <a href="/w/index.php?title=DGMP&amp;action=edit&amp;redlink=1" class="new" title="DGMP (la pagina non esiste)">dGMP</a> • <a href="/w/index.php?title=DCMP&amp;action=edit&amp;redlink=1" class="new" title="DCMP (la pagina non esiste)">dCMP</a> • <a href="/w/index.php?title=DADP&amp;action=edit&amp;redlink=1" class="new" title="DADP (la pagina non esiste)">dADP</a> • <a href="/w/index.php?title=DTDP&amp;action=edit&amp;redlink=1" class="new" title="DTDP (la pagina non esiste)">dTDP</a> • <a href="/w/index.php?title=DGDP&amp;action=edit&amp;redlink=1" class="new" title="DGDP (la pagina non esiste)">dGDP</a> • <a href="/w/index.php?title=DCDP&amp;action=edit&amp;redlink=1" class="new" title="DCDP (la pagina non esiste)">dCDP</a> • <a href="/w/index.php?title=DATP&amp;action=edit&amp;redlink=1" class="new" title="DATP (la pagina non esiste)">dATP</a> • <a href="/w/index.php?title=DTTP&amp;action=edit&amp;redlink=1" class="new" title="DTTP (la pagina non esiste)">dTTP</a> • <a href="/w/index.php?title=DGTP&amp;action=edit&amp;redlink=1" class="new" title="DGTP (la pagina non esiste)">dGTP</a> • <a href="/w/index.php?title=DCTP&amp;action=edit&amp;redlink=1" class="new" title="DCTP (la pagina non esiste)">dCTP</a> • <a href="/wiki/DNTP" title="DNTP">DNTP</a> • <a href="/wiki/Deossiribonucleotide" title="Deossiribonucleotide">Deossiribonucleotide</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/w/index.php?title=Acidi_deossinucleici&amp;action=edit&amp;redlink=1" class="new" title="Acidi deossinucleici (la pagina non esiste)">Acidi deossinucleici</a></th><td colspan="1" class="navbox_list navbox_even" style="text-align:left;"><a href="/wiki/Acido_deossiribonucleico" class="mw-redirect" title="Acido deossiribonucleico">DNA</a> • <a href="/wiki/DNA_mitocondriale" title="DNA mitocondriale">mtDNA</a> • <a href="/wiki/DNA_complementare" title="DNA complementare">cDNA</a> • <a href="/wiki/Plasmide" title="Plasmide">plasmide</a> • <a href="/wiki/Cosmide" title="Cosmide">cosmide</a> • <a href="/wiki/Bacterial_artificial_chromosome" title="Bacterial artificial chromosome">BAC</a> • <a href="/wiki/Yeast_artificial_chromosome" title="Yeast artificial chromosome">YAC</a> • <a href="/w/index.php?title=Human_artificial_chromosome&amp;action=edit&amp;redlink=1" class="new" title="Human artificial chromosome (la pagina non esiste)">HAC</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;"><a href="/wiki/Acidi_nucleici" title="Acidi nucleici">Acidi nucleici</a></th><td colspan="1" class="navbox_list navbox_odd" style="text-align:left;"><a href="/wiki/Acido_ribonucleico" class="mw-redirect" title="Acido ribonucleico">RNA</a> • <a href="/wiki/Pre-mRNA" title="Pre-mRNA">pre-mRNA</a> • <a href="/wiki/RNA_eterogeneo_nucleare" title="RNA eterogeneo nucleare">hnRNA</a> • <a href="/wiki/Small_nuclear_RNA" title="Small nuclear RNA">snRNA</a> • <a href="/wiki/RNA_messaggero" title="RNA messaggero">mRNA</a> • <a href="/wiki/RNA_transfer" title="RNA transfer">tRNA</a> • <a href="/wiki/RNA_ribosomiale" title="RNA ribosomiale">rRNA</a> • <a href="/wiki/RNA_guida" title="RNA guida">gRNA</a> • <a href="/wiki/RNA_non_codificante" title="RNA non codificante">ncRNA</a> • <a href="/w/index.php?title=SgRNA&amp;action=edit&amp;redlink=1" class="new" title="SgRNA (la pagina non esiste)">sgRNA</a> • <a href="/wiki/Short_hairpin_RNA" title="Short hairpin RNA">shRNA</a> • <a href="/wiki/Short_interfering_RNA" title="Short interfering RNA">siRNA</a> • <a class="mw-selflink selflink">miRNA</a> • <a href="/wiki/Piwi-interacting_RNA" title="Piwi-interacting RNA">piRNA</a> • <a href="/wiki/Small_nucleolar_RNA" title="Small nucleolar RNA">snoRNA</a> • <a href="/wiki/RNA_catalitico" class="mw-redirect" title="RNA catalitico">RNA catalitico</a></td></tr><tr><th colspan="1" class="navbox_group" style="text-align:right;">Analoghi degli acidi nucleici</th><td colspan="1" class="navbox_list navbox_even" style="text-align:left;"><a href="/w/index.php?title=Acido_gliconucleico&amp;action=edit&amp;redlink=1" class="new" title="Acido gliconucleico (la pagina non esiste)">GNA</a> • <a href="/w/index.php?title=Acido_nucleico_bloccato&amp;action=edit&amp;redlink=1" class="new" title="Acido nucleico bloccato (la pagina non esiste)">LNA</a> • <a href="/wiki/Acido_peptidonucleico" title="Acido peptidonucleico">PNA</a> • <a href="/wiki/Acido_treonucleico" title="Acido treonucleico">TNA</a> • <a href="/w/index.php?title=Morfolino&amp;action=edit&amp;redlink=1" class="new" title="Morfolino (la pagina non esiste)">Morfolino</a></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r141815314"><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Biologia_molecolare"><tbody><tr><th colspan="3"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Biologia_molecolare" title="Template:Biologia molecolare"><span title="Vai alla pagina del template">V</span></a>&#160;·&#160;<a href="/w/index.php?title=Discussioni_template:Biologia_molecolare&amp;action=edit&amp;redlink=1" class="new" title="Discussioni template:Biologia molecolare (la pagina non esiste)"><span title="Discuti del template">D</span></a>&#160;·&#160;<a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Biologia_molecolare&amp;action=edit"><span title="Modifica il template. Usa l&#39;anteprima prima di salvare">M</span></a></div></div><span class="navbox_title"><a href="/wiki/Biologia_molecolare" title="Biologia molecolare">Biologia molecolare</a></span></th></tr><tr><th colspan="3" class="navbox_abovebelow"><a href="/wiki/Dogma_centrale_della_biologia_molecolare" title="Dogma centrale della biologia molecolare">Dogma centrale della biologia molecolare</a></th></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Espressione_genica" title="Espressione genica">Espressione genica</a></th><td colspan="1" class="navbox_list navbox_odd"><table class="subnavbox"><tbody><tr><th class="subnavbox_group">Processi</th><td colspan="1"><a href="/wiki/Replicazione_del_DNA" title="Replicazione del DNA">Replicazione</a><b>&#160;·</b> <a href="/wiki/Trascrizione_(biologia)" title="Trascrizione (biologia)">Trascrizione</a><b>&#160;·</b> <a href="/wiki/Traduzione_(biologia)" class="mw-redirect" title="Traduzione (biologia)">Traduzione</a></td></tr><tr><th class="subnavbox_group">Elementi</th><td colspan="1"><a href="/wiki/Polimerasi" title="Polimerasi">Polimerasi</a> (<a href="/wiki/DNA_polimerasi" class="mw-redirect" title="DNA polimerasi">DNA polimerasi</a><b>&#160;·</b> <a href="/wiki/RNA_polimerasi" title="RNA polimerasi">RNA polimerasi</a>)<b>&#160;·</b> <a href="/wiki/Promotore_(biologia)" title="Promotore (biologia)">Promotore</a><b>&#160;·</b> <a href="/wiki/Introne" title="Introne">Introne</a><b>&#160;·</b> <a href="/wiki/Esone" title="Esone">Esone</a><b>&#160;·</b> <a href="/wiki/Terminatore_(biologia)" title="Terminatore (biologia)">Terminatore</a></td></tr><tr><th class="subnavbox_group"><a href="/wiki/Regolazione_genica" title="Regolazione genica">Regolazione genica</a></th><td colspan="1"><a href="/wiki/Enhancer" title="Enhancer">Enhancer</a><b>&#160;·</b> <a href="/wiki/TATA_box" title="TATA box">TATA box</a><b>&#160;·</b> <a href="/wiki/Repressore" title="Repressore">Repressore</a><b>&#160;·</b> <a href="/wiki/Operone" title="Operone">Operone</a><b>&#160;·</b> <a href="/wiki/Regulone" title="Regulone">Regulone</a></td></tr></tbody></table></td><td rowspan="3" class="navbox_image"><span typeof="mw:File"><a href="/wiki/File:Crystal_structure_1E3P.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Crystal_structure_1E3P.jpg/150px-Crystal_structure_1E3P.jpg" decoding="async" width="150" height="150" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Crystal_structure_1E3P.jpg/225px-Crystal_structure_1E3P.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/Crystal_structure_1E3P.jpg/300px-Crystal_structure_1E3P.jpg 2x" data-file-width="500" data-file-height="500" /></a></span></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Sintesi_proteica" title="Sintesi proteica">Sintesi proteica</a></th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/MRNA" class="mw-redirect" title="MRNA">mRNA</a><b>&#160;·</b> <a href="/wiki/TRNA" class="mw-redirect" title="TRNA">tRNA</a><b>&#160;·</b> <a href="/wiki/Ribosoma" title="Ribosoma">Ribosoma</a><b>&#160;·</b> <a href="/wiki/Splicing" title="Splicing">Splicing</a><b>&#160;·</b> <a href="/wiki/Modificazione_post_traduzionale" title="Modificazione post traduzionale">Modificazione post traduzionale</a></td></tr><tr><th colspan="1" class="navbox_group"><a href="/wiki/Categoria:Tecniche_di_laboratorio" title="Categoria:Tecniche di laboratorio">Tecniche</a></th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/BioBrick" title="BioBrick">BioBrick</a><b>&#160;·</b> <a href="/wiki/Clonaggio" title="Clonaggio">Clonaggio</a><b>&#160;·</b> <a href="/wiki/Reazione_a_catena_della_polimerasi" title="Reazione a catena della polimerasi">PCR</a><b>&#160;·</b> <a href="/wiki/Elettroforesi_su_gel_di_agarosio" title="Elettroforesi su gel di agarosio">Elettroforesi su gel di agarosio</a><b>&#160;·</b> <a href="/wiki/Elettroforesi_su_gel_di_poliacrilammide" title="Elettroforesi su gel di poliacrilammide">Elettroforesi su gel di poliacrilammide</a><b>&#160;·</b> <a href="/wiki/Southern_blot" title="Southern blot">Southern blot</a><b>&#160;·</b> <a href="/wiki/Northern_blot" title="Northern blot">Northern blot</a><b>&#160;·</b> <a href="/wiki/Western_blot" title="Western blot">Western blot</a><b>&#160;·</b> <a href="/wiki/Sequenziamento" title="Sequenziamento">Sequenziamento</a><b>&#160;·</b> <a href="/wiki/Sequenziamento_del_DNA" title="Sequenziamento del DNA">Sequenziamento del DNA</a></td></tr></tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r141815314"><table class="navbox mw-collapsible mw-collapsed noprint metadata" id="navbox-Genetica"><tbody><tr><th colspan="3"><div class="navbox_navbar"><div class="noprint plainlinks" style="background-color:transparent; padding:0; font-size:xx-small; color:var(--color-base, #000000); white-space:nowrap;"><a href="/wiki/Template:Genetica" title="Template:Genetica"><span title="Vai alla pagina del template">V</span></a>&#160;·&#160;<a href="/wiki/Discussioni_template:Genetica" title="Discussioni template:Genetica"><span title="Discuti del template">D</span></a>&#160;·&#160;<a class="external text" href="https://it.wikipedia.org/w/index.php?title=Template:Genetica&amp;action=edit"><span title="Modifica il template. Usa l&#39;anteprima prima di salvare">M</span></a></div></div><span class="navbox_title"><a href="/wiki/Genetica" title="Genetica">Genetica</a></span></th></tr><tr><th colspan="1" class="navbox_group">Materiale genetico</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Nucleotide" title="Nucleotide">Nucleotidi</a><b>&#160;·</b> <a href="/wiki/Base_azotata" title="Base azotata">Basi azotate</a><b>&#160;·</b> <a href="/wiki/Acidi_nucleici" title="Acidi nucleici">Acidi nucleici</a> <small>(<a href="/wiki/DNA" title="DNA">DNA</a><b>&#160;·</b> <a href="/wiki/RNA" title="RNA">RNA</a>)</small><b>&#160;·</b> <a href="/wiki/Cromosoma" title="Cromosoma">Cromosomi</a><b>&#160;·</b> <a href="/wiki/Genoma" title="Genoma">Genoma</a></td><td rowspan="4" class="navbox_image"><span typeof="mw:File"><a href="/wiki/File:ChromosomeArt.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d5/ChromosomeArt.jpg/60px-ChromosomeArt.jpg" decoding="async" width="60" height="104" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d5/ChromosomeArt.jpg/90px-ChromosomeArt.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d5/ChromosomeArt.jpg/120px-ChromosomeArt.jpg 2x" data-file-width="135" data-file-height="235" /></a></span></td></tr><tr><th colspan="1" class="navbox_group">Concetti chiave</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Gene" title="Gene">Gene</a><b>&#160;·</b> <a href="/wiki/Codice_genetico" title="Codice genetico">Codice genetico</a><b>&#160;·</b> <a href="/wiki/Allele" title="Allele">Allele</a><b>&#160;·</b> <a href="/wiki/Locus_genico" title="Locus genico">Locus</a><b>&#160;·</b> <a href="/wiki/Ereditariet%C3%A0_genetica" title="Ereditarietà genetica">Ereditarietà genetica</a><b>&#160;·</b> <a href="/wiki/Diversit%C3%A0_genetica" title="Diversità genetica">Diversità genetica</a><b>&#160;·</b> <a href="/wiki/Mutazione_genetica" title="Mutazione genetica">Mutazione genetica</a><b>&#160;·</b> <a href="/wiki/Variabilit%C3%A0_genetica" class="mw-redirect" title="Variabilità genetica">Variabilità genetica</a></td></tr><tr><th colspan="1" class="navbox_group">Campi della genetica</th><td colspan="1" class="navbox_list navbox_odd"><a href="/wiki/Genetica_formale" title="Genetica formale">Genetica formale</a><b>&#160;·</b> <a href="/wiki/Genetica_molecolare" title="Genetica molecolare">Genetica molecolare</a><b>&#160;·</b> <a href="/wiki/Genetica_delle_popolazioni" title="Genetica delle popolazioni">Genetica delle popolazioni</a><b>&#160;·</b> <a href="/wiki/Genomica" title="Genomica">Genomica</a><b>&#160;·</b> <a href="/wiki/Genetica_umana" title="Genetica umana">Genetica umana</a><b>&#160;·</b> <a href="/wiki/Epigenetica" title="Epigenetica">Epigenetica</a></td></tr><tr><th colspan="1" class="navbox_group">Genetisti</th><td colspan="1" class="navbox_list navbox_even"><a href="/wiki/Gregor_Mendel" title="Gregor Mendel">Gregor Mendel</a><b>&#160;·</b> <a href="/wiki/Thomas_Hunt_Morgan" title="Thomas Hunt Morgan">Thomas Hunt Morgan</a><b>&#160;·</b> <a href="/wiki/Ronald_Fisher" title="Ronald Fisher">Ronald Fisher</a><b>&#160;·</b> <a href="/wiki/Frederick_Griffith" title="Frederick Griffith">Frederick Griffith</a><b>&#160;·</b> <a href="/wiki/Erwin_Chargaff" title="Erwin Chargaff">Erwin Chargaff</a><b>&#160;·</b> <a href="/wiki/Barbara_McClintock" title="Barbara McClintock">Barbara McClintock</a><b>&#160;·</b> <a href="/wiki/James_Dewey_Watson" title="James Dewey Watson">James Watson</a><b>&#160;·</b> <a href="/wiki/Francis_Crick" title="Francis Crick">Francis Crick</a><b>&#160;·</b> <a href="/wiki/Rosalind_Franklin" title="Rosalind Franklin">Rosalind Franklin</a><b>&#160;·</b> <a href="/wiki/Alec_Jeffreys" title="Alec Jeffreys">Alec Jeffreys</a></td></tr></tbody></table> <div class="noprint" style="width:100%; 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