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<!DOCTYPE html> <html lang="en" dir="ltr"> <head>  <script async src="https://www.googletagmanager.com/gtag/js?id=G-P63WKM1TM1"></script> <script> window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-P63WKM1TM1'); </script>  <script type="text/javascript" > (function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)}; m[i].l=1*new Date(); for (var j = 0; j < document.scripts.length; j++) {if (document.scripts[j].src === r) { return; }} k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)}) (window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym"); ym(55165297, "init", { clickmap:false, trackLinks:true, accurateTrackBounce:true, webvisor:false }); </script> <noscript><div><img src="https://mc.yandex.ru/watch/55165297" style="position:absolute; left:-9999px;" alt="" /></div></noscript>    <title>Search results for: Howaida M. Abd El-Salam</title> <meta name="description" content="Search results for: Howaida M. Abd El-Salam"> <meta name="keywords" content="Howaida M. Abd El-Salam"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" href="https://waset.org"> <img src="https://cdn.waset.org/static/images/wasetc.png" alt="Open Science Research Excellence" title="Open Science Research Excellence" /> </a> <button class="d-block d-lg-none navbar-toggler ml-auto" type="button" data-toggle="collapse" data-target="#navbarMenu" aria-controls="navbarMenu" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="w-100"> <div class="d-none d-lg-flex flex-row-reverse"> <form method="get" action="https://waset.org/search" class="form-inline my-2 my-lg-0"> <input class="form-control mr-sm-2" type="search" placeholder="Search Conferences" value="Howaida M. 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Abd El-Salam"> <input type="submit" class="btn_search" value="Search"> </div> </div> </form> </div> </div> <div class="row mt-3"> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Commenced</strong> in January 2007</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Frequency:</strong> Monthly</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Edition:</strong> International</div> </div> </div> <div class="col-sm-3"> <div class="card"> <div class="card-body"><strong>Paper Count:</strong> 12</div> </div> </div> </div> <h1 class="mt-3 mb-3 text-center" style="font-size:1.6rem;">Search results for: Howaida M. Abd El-Salam</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">12</span> Study the Performance of Metal-Organic Framework in Adsorptive Desulfurization for Gas Oil</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hoda%20A.%20Mohammed">Hoda A. Mohammed</a>, <a href="https://publications.waset.org/abstracts/search?q=Esraa%20M.%20El-Fawal"> Esraa M. El-Fawal</a>, <a href="https://publications.waset.org/abstracts/search?q=Howaida%20M.%20Abd%20El-Salam"> Howaida M. Abd El-Salam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Organic sulfurs in fuel oil cause serious environmental pollution and health problems. The important future direction for liquid fuel desulfurization is adsorptive desulfurization technology due to its simplicity, mild operating condition, and low cost. In this work, the well-prepared Nickel NPs were incorporated in a highly porous metal-organic framework MIL-101(Cr)) to produce Ni/Cr-MOF composite. Besides, the synthesis of Ni/Cr-MOF in the presence of Bi₂MoO₆/AC to prepare Bi₂MoO₆/AC@Ni/Cr-MOF. All the prepared composites were synthesized via a facile technique under ambient conditions to remove organosulfur compounds. The XRD, FT-IR, SEM, and BET techniques were used to characterize the prepared composites. The desulfurization performance of real gas oil by Bi₂MoO₆/AC, Ni/Cr-MOF, and Bi₂MoO₆/AC@Ni/Cr-MOF was investigated at different adsorbent doses and contact times. Bi₂MoO₆/AC@Ni/Cr-MOF shows the highest desulfurization performance, with removal efficiency reached to 80% at optimum conditions for a contact time of 4 hours. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=desulfurization" title="desulfurization">desulfurization</a>, <a href="https://publications.waset.org/abstracts/search?q=gas%20oil" title=" gas oil"> gas oil</a>, <a href="https://publications.waset.org/abstracts/search?q=metal-organic%20framework" title=" metal-organic framework"> metal-organic framework</a>, <a href="https://publications.waset.org/abstracts/search?q=sorption%20characteristics" title=" sorption characteristics"> sorption characteristics</a> </p> <a href="https://publications.waset.org/abstracts/171501/study-the-performance-of-metal-organic-framework-in-adsorptive-desulfurization-for-gas-oil" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/171501.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">80</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">11</span> A Survey on Countermeasures of Cache-Timing Attack on AES Systems</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Settana%20M.%20Abdulh">Settana M. Abdulh</a>, <a href="https://publications.waset.org/abstracts/search?q=Naila%20A.%20Sadalla"> Naila A. Sadalla</a>, <a href="https://publications.waset.org/abstracts/search?q=Yaseen%20H.%20Taha"> Yaseen H. Taha</a>, <a href="https://publications.waset.org/abstracts/search?q=Howaida%20Elshoush"> Howaida Elshoush</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Side channel attacks are based on side channel information, which is information that is leaked from encryption systems. This includes timing information, power consumption as well as electromagnetic or even sound leaking which can exploited by an attacker. Implementing side channel attacks are possible if and only if an attacker has access to a cryptosystem. In this case, the attacker can exploit bad implementation in software or hardware which is not controlled by encryption implementer. Thus, he/she will represent a real threat to the security system. Several countermeasures have been proposed to eliminate side channel information vulnerability.Cache timing attack is a special type of side channel attack. Here, timing information is collected and analyzed by an attacker to guess sensitive information such as encryption key or plaintext. This paper reviews the technique applied in this attack and surveys the countermeasures against it, evaluating the feasibility and usability of each. Based on this evaluation, finally we pose several recommendations about using these countermeasures. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=AES%20algorithm" title="AES algorithm">AES algorithm</a>, <a href="https://publications.waset.org/abstracts/search?q=side%20channel%20attack" title=" side channel attack"> side channel attack</a>, <a href="https://publications.waset.org/abstracts/search?q=cache%20timing%20attack" title=" cache timing attack"> cache timing attack</a>, <a href="https://publications.waset.org/abstracts/search?q=cache%20timing%20countermeasure" title=" cache timing countermeasure"> cache timing countermeasure</a> </p> <a href="https://publications.waset.org/abstracts/17652/a-survey-on-countermeasures-of-cache-timing-attack-on-aes-systems" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/17652.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">299</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">10</span> Cardenolides from the Egyptian Cultivar: Acokanthera spectabilis Leaves Inducing Apoptosis through Arresting Hepatocellular Carcinoma Growth at G2/M</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Maha%20Soltan">Maha Soltan</a>, <a href="https://publications.waset.org/abstracts/search?q=Amal%20Z.%20Hassan"> Amal Z. Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Howaida%20I.%20Abd-Alla"> Howaida I. Abd-Alla</a>, <a href="https://publications.waset.org/abstracts/search?q=Atef%20G.%20Hanna"> Atef G. Hanna</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Two naturally known cardenolides; acovenoside A and acobioside A were isolated from the Egyptian cultivar; Acokanthera spectabilis leaves. It is an ornamental and poisonous plant that has been traditionally claimed for their medicinal properties against infectious microbes, killing worms and curing some inflammations at little amounts. We examined the growth inhibition effects of both cardenolides against four types of human cancer cell lines using Sulphorhodamine B assay. In addition, the clonogenic assay was also performed for testing the growth inhibiting power of the isolated compounds. An in vitro mechanistic investigation was further accomplished against hepatocellular carcinoma HepG2 cell line. Microscopic examination, colorimetric ELISA and flow cytometry techniques were our tools of proving at least part of the anticancer pathway of the tested compounds. Both compounds were able to inhibit the growth of 4 human cancer cell lines at less than 100 nM. In addition, they were able to activate the executioner Caspase-3 and apoptosis was then induced as a consequence of cell growth arrest at G2/M. An attention must be payed to those bioactive agents particularly when giving their activity against cancer cells at considerable small values while presenting safe therapeutic margins as indicated by literature. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=anticancer" title="anticancer">anticancer</a>, <a href="https://publications.waset.org/abstracts/search?q=cardenolides" title=" cardenolides"> cardenolides</a>, <a href="https://publications.waset.org/abstracts/search?q=Caspase-3" title=" Caspase-3"> Caspase-3</a>, <a href="https://publications.waset.org/abstracts/search?q=apoptosis" title=" apoptosis"> apoptosis</a> </p> <a href="https://publications.waset.org/abstracts/101830/cardenolides-from-the-egyptian-cultivar-acokanthera-spectabilis-leaves-inducing-apoptosis-through-arresting-hepatocellular-carcinoma-growth-at-g2m" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/101830.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">147</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">9</span> Nanoderma: Ecofriendly Nano Biofungicides for Controlling Plant Pathogenic Fungi</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Kamel%20A.%20Abd-Elsalam">Kamel A. Abd-Elsalam</a>, <a href="https://publications.waset.org/abstracts/search?q=Alexei%20R.%20Khokhlov"> Alexei R. Khokhlov</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Studies on bioefficacy (in vitro and in vivo) and mode of action of the nanocides against the most important plant diseases in Egypt and Russia might assist in the goal of sustainable agriculture. To our knowledge, few researchers have evaluated the combined antimicrobial effect of inorganic nanoparticles (NPs) with bioorganic pesticides for controlling plant pathogens in the greenhouse and open field, decontrol investigated synergistic effect. In the current project, we will develop eco-friendly alternative management strategies including the use of heavy nanometal-tolerant Trichoderma strains and the main effective material in conventional fungicides (curpic, sulfur, phosphorus and zinc) for controlling plant diseases. Studies on bioefficacy and the mechanism of the nanocides against the most important plant diseases in Egypt were evaluated. There is a growing need to establish mechanisms of action for nano bio and/or fungicides to assist the design of new compounds or combinations of compounds, in order to understand resistance mechanisms and to provide a focus for toxicological attention. Nanofungicides represent an emerging technological development that could oﬀer a range of beneﬁts including increased eﬃcacy, durability, and a reduction in the amounts of active ingredients that need to be used. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biohybrids" title="biohybrids">biohybrids</a>, <a href="https://publications.waset.org/abstracts/search?q=biocides" title=" biocides"> biocides</a>, <a href="https://publications.waset.org/abstracts/search?q=bioagent" title=" bioagent"> bioagent</a>, <a href="https://publications.waset.org/abstracts/search?q=plant%20pathogenic%20fungi" title=" plant pathogenic fungi"> plant pathogenic fungi</a> </p> <a href="https://publications.waset.org/abstracts/70903/nanoderma-ecofriendly-nano-biofungicides-for-controlling-plant-pathogenic-fungi" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/70903.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">255</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">8</span> Trehalose-Based Nanocarriers for Alleviation of Inflammation in Colitis</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Wessam%20H.%20Abd-Elsalam">Wessam H. Abd-Elsalam</a>, <a href="https://publications.waset.org/abstracts/search?q=Mona%20M.%20Saber"> Mona M. Saber</a>, <a href="https://publications.waset.org/abstracts/search?q=Samar%20M.%20Abouelatta"> Samar M. Abouelatta</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Non-steroidal anti-inflammatory drugs (NSAIDs) are considered a double edged sword in inflammatory bowel diseases (IBDs). Some studies reported their advantageous effect in decreasing inflammation, and other studies reported that their use is associated with colitis aggravation. This study aimed to use specifically formulated trehalose-based nano-carriers that targets the colon in an attempt to alleviate inflammation caused by NSAIDs. L-α-phosphatidylcholine (PL), trehalose, and transcutol were used to prepare the trehalosomes (THs), which were also loaded with Tenoxicam(TXM) as a model NSAID. To optimize the formulation variables, a full 23 factorial design, using Design-Expert® software, was performed. The optimized formulation composed of trehalose: PL at a weight ratio of 1:1, 377.72 mg transcutol, and sonicated for 4 min, possessed a spherical shape with a size of 268.61 nm and EE% of 97.83% and released 70.22% of its drug content over 24 h. The superior protective action of TXM loaded THs compared to TXM suspension and drug-free THs was shown by the inhibition of the inflammatory biomarkers, namely; IL-1ß, IL-6, and TNF-alpha levels, as well as oxidative stress markers, measured as GSH and MDA. Improved histopathology of the colonic tissue in male New Zealand rabbits also confirmed the superiority of the TXM loaded THs compared to the unformulated drug or the drug free nano-carriers. Our findings highlight the prosperous role of THs in colon targeting and its anti-inflammatory characteristics in guarding against possible NSAIDs-driven exacerbation of colitis. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=inflammatory%20bowel%20disease" title="inflammatory bowel disease">inflammatory bowel disease</a>, <a href="https://publications.waset.org/abstracts/search?q=trehalose" title=" trehalose"> trehalose</a>, <a href="https://publications.waset.org/abstracts/search?q=trehalosomes" title=" trehalosomes"> trehalosomes</a>, <a href="https://publications.waset.org/abstracts/search?q=colon%20targeting" title=" colon targeting"> colon targeting</a> </p> <a href="https://publications.waset.org/abstracts/149309/trehalose-based-nanocarriers-for-alleviation-of-inflammation-in-colitis" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/149309.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">138</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">7</span> Nagami Kumkuat: A Source of Antiviral and Antimicrobial Bioactive Compounds</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Howaida%20I.%20Abd-Alla">Howaida I. Abd-Alla</a>, <a href="https://publications.waset.org/abstracts/search?q=Nagwa%20M.%20M.%20Shalaby"> Nagwa M. M. Shalaby</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The fruit rind of Fortunella margarita (Nagami Kumkuat) was investigated for its chemical constituents. Thirteen metabolites were obtained and classified into, a sterol; β-sitosterol (1) and twelve phenolic compounds, three coumarins; xanthotoxin (2), isopimpinellin (3), umbelliferone (4), nine flavonoids of O-glycosides of flavone; apigenin-7-O-β-D-glucopyranoside (5), apigenin-7-O-rhamnoglucoside (rhoifolin) (6), C-glycosides; vitexin (7), vicenin II (8), and the methoxylated; 6-methoxyapigenin-7-methyl ether (9) and tangeretin (10) as well as flavanones class; naringenin (11), liquiritigenin (12), hesperdin (hesperetin-7-rhamnoglucoside) (13). All compounds were identified for the first time in F. margarita except compound (8). The major glycosides 5, 6, and 13 and total crude extract showed potential antiviral activity against live Newcastle disease virus vaccine strains (Komarov and LaSota) and live infectious bursitis viruses vaccine strain D78 replication in VERO cell cultures and on specific pathogen-free embryonated chicken eggs. Antiviral inhibitory concentration fifty (IC50), cytotoxic concentration fifty (CC50), and therapeutic index (TI) were calculated. In addition, the extract and compounds 7 and 13 showed marked antimicrobial activity against different strains of fungi, Gram-positive and negative bacteria, including some foodborne pathogens of animal origin, caused human disease. These results suggested that the extract of F. margarita may be considered potentially useful as a source of natural antiviral and antimicrobial agents. It can be used as an ingredient for functional food and/or pharmaceuticals. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=antimicrobial" title="antimicrobial">antimicrobial</a>, <a href="https://publications.waset.org/abstracts/search?q=antiviral" title=" antiviral"> antiviral</a>, <a href="https://publications.waset.org/abstracts/search?q=Fortunella%20margarita" title=" Fortunella margarita"> Fortunella margarita</a>, <a href="https://publications.waset.org/abstracts/search?q=Nagami%20Kumkuat" title=" Nagami Kumkuat"> Nagami Kumkuat</a>, <a href="https://publications.waset.org/abstracts/search?q=phenolic%20secondary%20metabolites" title=" phenolic secondary metabolites"> phenolic secondary metabolites</a> </p> <a href="https://publications.waset.org/abstracts/140746/nagami-kumkuat-a-source-of-antiviral-and-antimicrobial-bioactive-compounds" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140746.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">206</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Cytotoxic, Antimicrobial and Antiviral Activities of Acovenoside A: A Cardenolide Isolated from an Egyptian Cultivar of Acokanthera spectabilis Leaves</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Howaida%20I.%20Abd-Alla">Howaida I. Abd-Alla</a>, <a href="https://publications.waset.org/abstracts/search?q=Amal%20Z.%20Hassan"> Amal Z. Hassan</a>, <a href="https://publications.waset.org/abstracts/search?q=Maha%20Soltan"> Maha Soltan</a>, <a href="https://publications.waset.org/abstracts/search?q=Atef%20G.%20Hanna"> Atef G. Hanna</a>, <a href="https://publications.waset.org/abstracts/search?q=Mounir%20M.%20El-Safty"> Mounir M. El-Safty</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Acokanthera oblongifolia (Apocynaceae) is used for treatment of several infection diseases and is a well-known cardiac glycoside-containing plant. The infusion of their leaves is gargled to treat tonsillitis and is used medicinally to treat snakebites. The total cardiac glycosides content in the leaves was determined by referring to gitoxigenin as a reference compound. Two triterpenes, lup-20(29)-en-3β-ol (1) and oleanolic acid (2); two cardenolides, acovenoside A (3) and acobioside A (4) were isolated from the ethyl acetate extract. Their structures were determined on the basis of spectral analysis. Major constituents isolated from this species were evaluated for cytotoxicity against normal lung cell line (Wi38) and antimicrobial activities against Gram-positive (two strains) and Gram-negative bacteria (four strains), yeast-like fungi (two strains) and fungi (five strains). The minimum inhibitory concentration (MIC) of the compounds was determined using broth microdilution method. Their viral inhibitory effects against avian influenza virus type A (AI-H5N1) and Newcastle disease virus (NDV) in specific pathogen free (SPF) embryonated chicken eggs (ECE), chicken embryo fibroblasts (CEF) and Vero cells were evaluated. The cardenolide (3) showed viral inhibitory effects against AI-H5N1 and NDV in SPF ECE. The two cardenolides isolated have shown potent cytotoxicity against Vero cells. Compound (3) showed potent anti-Gram-negative bacteria activity. These results suggested that acovenoside A might be promising for future antiviral and antimicrobial drug design. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Acokanthera" title="Acokanthera">Acokanthera</a>, <a href="https://publications.waset.org/abstracts/search?q=AI-H5N1" title=" AI-H5N1"> AI-H5N1</a>, <a href="https://publications.waset.org/abstracts/search?q=Cardenolides" title=" Cardenolides"> Cardenolides</a>, <a href="https://publications.waset.org/abstracts/search?q=NDV" title=" NDV"> NDV</a>, <a href="https://publications.waset.org/abstracts/search?q=SPF-ECE" title=" SPF-ECE"> SPF-ECE</a>, <a href="https://publications.waset.org/abstracts/search?q=VERO" title=" VERO"> VERO</a>, <a href="https://publications.waset.org/abstracts/search?q=Wi38" title=" Wi38 "> Wi38 </a>, <a href="https://publications.waset.org/abstracts/search?q=Microbe" title=" Microbe "> Microbe </a> </p> <a href="https://publications.waset.org/abstracts/93780/cytotoxic-antimicrobial-and-antiviral-activities-of-acovenoside-a-a-cardenolide-isolated-from-an-egyptian-cultivar-of-acokanthera-spectabilis-leaves" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/93780.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">178</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Beta-Carotene Attenuates Cognitive and Hepatic Impairment in Thioacetamide-Induced Rat Model of Hepatic Encephalopathy via Mitigation of MAPK/NF-κB Signaling Pathway</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Marawan%20Abd%20Elbaset%20Mohamed">Marawan Abd Elbaset Mohamed</a>, <a href="https://publications.waset.org/abstracts/search?q=Hanan%20A.%20Ogaly"> Hanan A. Ogaly</a>, <a href="https://publications.waset.org/abstracts/search?q=Rehab%20F.%20Abdel-Rahman"> Rehab F. Abdel-Rahman</a>, <a href="https://publications.waset.org/abstracts/search?q=Ahmed-Farid%20O.A."> Ahmed-Farid O.A.</a>, <a href="https://publications.waset.org/abstracts/search?q=Marwa%20S.%20Khattab"> Marwa S. Khattab</a>, <a href="https://publications.waset.org/abstracts/search?q=Reham%20M.%20Abd-Elsalam"> Reham M. Abd-Elsalam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Liver fibrosis is a severe worldwide health concern due to various chronic liver disorders. Hepatic encephalopathy (HE) is one of its most common complications affecting liver and brain cognitive function. Beta-Carotene (B-Car) is an organic, strongly colored red-orange pigment abundant in fungi, plants, and fruits. The study attempted to know B-Car neuroprotective potential against thioacetamide (TAA)-induced neurotoxicity and cognitive decline in HE in rats. Hepatic encephalopathy was induced by TAA (100 mg/kg, i.p.) three times per week for two weeks. B-Car was given orally (10 or 20 mg/kg) daily for two weeks after TAA injections. Organ body weight ratio, Serum transaminase activities, liver’s antioxidant parameters, ammonia, and liver histopathology were assessed. Also, the brain’s mitogen-activated protein kinase (MAPK), nuclear factor kappa B (NF-κB), antioxidant parameters, adenosine triphosphate (ATP), adenosine monophosphate (AMP), norepinephrine (NE), dopamine (DA), serotonin (5-HT), 5-hydroxyindoleacetic acid (5-HIAA) cAMP response element-binding protein (CREB) expression and B-cell lymphoma 2 (Bcl-2) expression were measured. The brain’s cognitive functions (Spontaneous locomotor activity, Rotarod performance test, Object recognition test) were assessed. B-Car prevented alteration of the brain’s cognitive function in a dose-dependent manner. The histopathological outcomes supported these biochemical evidences. Based on these results, it could be established that B-Car could be assigned to treat the brain’s neurotoxicity consequences of HE via downregualtion of MAPK/NF-κB signaling pathways. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=beta-carotene" title="beta-carotene">beta-carotene</a>, <a href="https://publications.waset.org/abstracts/search?q=liver%20injury" title=" liver injury"> liver injury</a>, <a href="https://publications.waset.org/abstracts/search?q=MAPK" title=" MAPK"> MAPK</a>, <a href="https://publications.waset.org/abstracts/search?q=NF-%CE%BAB" title="NF-κB">NF-κB</a>, <a href="https://publications.waset.org/abstracts/search?q=rat" title=" rat"> rat</a>, <a href="https://publications.waset.org/abstracts/search?q=thioacetamide" title=" thioacetamide"> thioacetamide</a> </p> <a href="https://publications.waset.org/abstracts/148316/beta-carotene-attenuates-cognitive-and-hepatic-impairment-in-thioacetamide-induced-rat-model-of-hepatic-encephalopathy-via-mitigation-of-mapknf-kb-signaling-pathway" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/148316.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">154</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Silymarin Reverses Scopolamine-Induced Memory Deficit in Object Recognition Test in Rats: A Behavioral, Biochemical, Histopathological and Immunohistochemical Study</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salma%20A.%20El-Marasy">Salma A. El-Marasy</a>, <a href="https://publications.waset.org/abstracts/search?q=Reham%20M.%20Abd-Elsalam"> Reham M. Abd-Elsalam</a>, <a href="https://publications.waset.org/abstracts/search?q=Omar%20A.%20Ahmed-Farid"> Omar A. Ahmed-Farid</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Dementia is characterized by impairments in memory and other cognitive abilities. This study aims to elucidate the possible ameliorative effect of silymarin on scopolamine-induced dementia using the object recognition test (ORT). The study was extended to demonstrate the role of cholinergic activity, oxidative stress, neuroinflammation, brain neurotransmitters and histopathological changes in the anti-amnestic effect of silymarin in demented rats. Wistar rats were pretreated with silymarin (200, 400, 800 mg/kg) or donepezil (10 mg/kg) orally for 14 consecutive days. Dementia was induced after the last drug administration by a single intraperitoneal dose of scopolamine (16 mg/kg). Then behavioral, biochemical, histopathological, and immunohistochemical analyses were then performed. Rats pretreated with silymarin counteracted scopolamine-induced non-spatial working memory impairment in the ORT and decreased acetylcholinesterase (AChE) activity, reduced malondialdehyde (MDA), elevated reduced glutathione (GSH), restored gamma-aminobutyric acid (GABA) and dopamine (DA) contents in the cortical and hippocampal brain homogenates. Silymarin dose-dependently reversed scopolamine-induced histopathological changes. Immunohistochemical analysis showed that silymarin dose-dependently mitigated protein expression of a glial fibrillary acidic protein (GFAP) and nuclear factor kappa-B (NF-κB) in the brain cortex and hippocampus. All these effects of silymarin were similar to that of the standard anti-amnestic drug, donepezil. This study reveals that the ameliorative effect of silymarin on scopolamine-induced dementia in rats using the ORT maybe in part mediated by, enhancement of cholinergic activity, anti-oxidant and anti-inflammatory activities as well as mitigation in brain neurotransmitters and histopathological changes. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=dementia" title="dementia">dementia</a>, <a href="https://publications.waset.org/abstracts/search?q=donepezil" title=" donepezil"> donepezil</a>, <a href="https://publications.waset.org/abstracts/search?q=object%20recognition%20test" title=" object recognition test"> object recognition test</a>, <a href="https://publications.waset.org/abstracts/search?q=rats" title=" rats"> rats</a>, <a href="https://publications.waset.org/abstracts/search?q=silymarin" title=" silymarin"> silymarin</a>, <a href="https://publications.waset.org/abstracts/search?q=scopolamine" title=" scopolamine"> scopolamine</a> </p> <a href="https://publications.waset.org/abstracts/90170/silymarin-reverses-scopolamine-induced-memory-deficit-in-object-recognition-test-in-rats-a-behavioral-biochemical-histopathological-and-immunohistochemical-study" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90170.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">138</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Yellow Necklacepod and Shih-Balady: Possible Promising Sources Against Human Coronaviruses</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Howaida%20I.%20Abd-Alla">Howaida I. Abd-Alla</a>, <a href="https://publications.waset.org/abstracts/search?q=Omnia%20Kutkat"> Omnia Kutkat</a>, <a href="https://publications.waset.org/abstracts/search?q=Yassmin%20Moatasim"> Yassmin Moatasim</a>, <a href="https://publications.waset.org/abstracts/search?q=Magda%20T.%20Ibrahim"> Magda T. Ibrahim</a>, <a href="https://publications.waset.org/abstracts/search?q=Marwa%20A.%20Mostafa"> Marwa A. Mostafa</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20GabAllah"> Mohamed GabAllah</a>, <a href="https://publications.waset.org/abstracts/search?q=Mounir%20M.%20El-Safty"> Mounir M. El-Safty</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Artemisia judaica (known shih-balady), Azadirachta indica and Sophora tomentosa (known yellow necklace pod) are members of available medicinal plants well-known for their traditional medical use in Egypt which suggests that they probably harbor broad-spectrum antiviral, immunostimulatory and anti-inflammatory functions. Their ethyl acetate-dichloromethane (1:1, v/v) extracts were evaluated for the potential anti-Middle East respiratory syndrome-related coronavirus (anti-MERS-CoV) activity. Their cytotoxic activity was tested in Vero-E6 cells using 3-(4,-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method with minor modification. The plot of percentage cytotoxicity for each extract concentration has calculated the concentration which exhibited 50% cytotoxic concentration (TC50). A plaque reduction assay was employed using safe dose of extract to evaluate its effect on virus propagation. The highest inhibition percentage was recorded for the yellow necklace pod, followed by Shih-balady. The possible mode of action of virus inhibition was studied at three different levels viral replication, viral adsorption and virucidal activity. The necklace pod leaves have induced virucidal effects and direct effects on the replication of virus. Phytochemical investigation of the promising necklace pod led to the isolation and structure determination of nine compounds. The structure of each compound was determined by a variety of spectroscopic methods. Compounds 4-O-methyl sorbitol 1, 8-methoxy daidzin 6 and 6-methoxy apigenin-7-O-β-D-glucopyranoside 8 were isolated for the first time from the Sophora genus and the other six compounds were the first time that they were isolated from this species according to available works of literature. Generally, the highest anti-CoV 2 activity of S. tomentosa was associated with the crude ethanolic extract, indicating the possibility of synergy among the antiviral phytochemical constituents (1-9). <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=coronavirus" title="coronavirus">coronavirus</a>, <a href="https://publications.waset.org/abstracts/search?q=MERS-CoV" title=" MERS-CoV"> MERS-CoV</a>, <a href="https://publications.waset.org/abstracts/search?q=mode%20of%20action" title=" mode of action"> mode of action</a>, <a href="https://publications.waset.org/abstracts/search?q=necklace%20pod" title=" necklace pod"> necklace pod</a>, <a href="https://publications.waset.org/abstracts/search?q=shih-balady" title=" shih-balady"> shih-balady</a> </p> <a href="https://publications.waset.org/abstracts/140747/yellow-necklacepod-and-shih-balady-possible-promising-sources-against-human-coronaviruses" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/140747.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">209</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Neuroprotective Effect of Chrysin on Thioacetamide-Induced Hepatic Encephalopathy in Rats: Role of Oxidative Stress and TLR-4/NF-κB Pathway</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20El-Marasy">S. A. El-Marasy</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20A.%20El%20Awdan"> S. A. El Awdan</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20M.%20Abd-Elsalam"> R. M. Abd-Elsalam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> This study aimed to investigate the possible neuroprotective effect of chrysin on thioacetamide (TAA)-induced hepatic encephalopathy in rats. Also, the effect of chrysin on motor impairment, cognitive deficits, oxidative stress, neuroinflammation, apoptosis and histopathological damage was assessed. Male Wistar rats were randomly allocated into five groups. The first group received the vehicle (distilled water) for 21 days and is considered as normal group. While the second one received intraperitoneal dose of TAA (200 mg/kg) at three alternative days during the third week of the experiment to induce HE and is considered as control group. The other three groups were orally administered chrysin for 21 days (25, 50, 100 mg/kg) and starting from day 17; rats received intraperitoneal dose of TAA (200 mg/kg) at three alternative days. Then behavioral, biochemical, histopathological and immunohistochemical analyses were assessed. Then behavioral, biochemical, histopathological and immunohistochemical analyses were assessed. Chrysin reversed TAA-induced motor coordination in rotarod test, cognitive deficits in object recognition test (ORT) and attenuated serum ammonia, hepatic liver enzymes, reduced malondialdehyde (MDA), elevated reduced glutathione (GSH), reduced nuclear factor kappa B (NF-κB), tumor necrosis factor-alpha (TNF-α) and Interleukin-6 (IL-6) brain contents. Chrysin administration also reduced Toll-4 receptor (TLR-4) gene expression, caspase-3 protein expression, hepatic necrosis and astrocyte swelling. This study depicts that chrysin exerted neuroprotective effect in TAA-induced HE rats, evidenced by improvement of cognitive deficits, motor incoordination and histopathological changes such as astrocyte swelling and vacuolization; hallmarks in HE, via reducing hyperammonemia, ameliorating hepatic function, in addition to its anti-oxidant, inactivation of TLR-4/NF-κB inflammatory pathway, and anti-apoptotic effects. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=chrysin" title="chrysin">chrysin</a>, <a href="https://publications.waset.org/abstracts/search?q=hepatic%20encephalopathy" title=" hepatic encephalopathy"> hepatic encephalopathy</a>, <a href="https://publications.waset.org/abstracts/search?q=oxidative%20stress" title=" oxidative stress"> oxidative stress</a>, <a href="https://publications.waset.org/abstracts/search?q=rats" title=" rats"> rats</a>, <a href="https://publications.waset.org/abstracts/search?q=thioacetamide" title=" thioacetamide"> thioacetamide</a>, <a href="https://publications.waset.org/abstracts/search?q=TLR4%2FNF-%CE%BAB%20pathway" title=" TLR4/NF-κB pathway"> TLR4/NF-κB pathway</a> </p> <a href="https://publications.waset.org/abstracts/90165/neuroprotective-effect-of-chrysin-on-thioacetamide-induced-hepatic-encephalopathy-in-rats-role-of-oxidative-stress-and-tlr-4nf-kb-pathway" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90165.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">161</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Neuroprotective Effect of Vildagliptin against Cerebral Ischemia in Rats</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Salma%20A.%20El-Marasy">Salma A. El-Marasy</a>, <a href="https://publications.waset.org/abstracts/search?q=Rehab%20F.%20Abdel-Rahman"> Rehab F. Abdel-Rahman</a>, <a href="https://publications.waset.org/abstracts/search?q=Reham%20M.%20Abd-Elsalam"> Reham M. Abd-Elsalam</a> </p> <p class="card-text"><strong>Abstract:</strong></p> The burden of stroke is intensely increasing worldwide. Brain injury following transient or permanent focal cerebral ischemia develops ischemic stroke as a consequence of a complex series of pathophysiological events. The aim of this study is to evaluate the possible neuroprotective effect of a dipeptidyl peptidase-4 inhibitor, vildagliptin, independent on its insulinotropic properties in non-diabetic rats subjected to cerebral ischemia. Anaesthetized Wistar rats were subjected to either left middle cerebral artery occlusion (MCAO) or sham operation followed by reperfusion after 30 min of MCAO. The other three groups were orally administered vildagliptin at 3 dose levels (2.5, 5, 10 mg/kg) for 3 successive weeks before subjected to left focal cerebral ischemia/reperfusion and till the end of the study. Neurological deficit scores and motor activity were assessed 24h following reperfusion. 48h following reperfusion, rats were euthanized and their left brain hemispheres were harvested and used in the biochemical, histopathological, and immunohistochemical investigations. Vildagliptin pretreatment improved neurological score deficit, locomotor activity and motor coordination in MCAO rats. Moreover, vildagliptin reduced malondialdehyde (MDA), elevated reduced glutathione (GSH), phosphotylinosital 3 kinase (PI3K), phosphorylated of protein kinase B (p-AKT), and mechanistic target of rapamycin (mTOR) brain contents in addition to reducing protein expression of caspase-3. Also, vildagliptin showed a dose-dependent attenuation in neuronal cell loss and histopathological alterations in MCAO rats. This study proves that vildagliptin exerted the neuroprotective effect in a dose-dependent manner as shown in amelioration of neuronal cell loss and histopathological damage in MCAO rats, which may be mediated by attenuating neuronal and motor deficits, it’s anti-oxidant property, activation of PI3K/AKT/mTOR pathway and its anti-apoptotic effect. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=caspase-3" title="caspase-3">caspase-3</a>, <a href="https://publications.waset.org/abstracts/search?q=cerebral%20ischemia" title=" cerebral ischemia"> cerebral ischemia</a>, <a href="https://publications.waset.org/abstracts/search?q=dipeptidyl%20peptidase-4%20inhibitor" title=" dipeptidyl peptidase-4 inhibitor"> dipeptidyl peptidase-4 inhibitor</a>, <a href="https://publications.waset.org/abstracts/search?q=oxidative%20stress" title=" oxidative stress"> oxidative stress</a>, <a href="https://publications.waset.org/abstracts/search?q=PI3K%2FAKT%2FmTOR%20pathway" title=" PI3K/AKT/mTOR pathway"> PI3K/AKT/mTOR pathway</a>, <a href="https://publications.waset.org/abstracts/search?q=rats" title=" rats"> rats</a>, <a href="https://publications.waset.org/abstracts/search?q=vildagliptin" title=" vildagliptin"> vildagliptin</a> </p> <a href="https://publications.waset.org/abstracts/90168/neuroprotective-effect-of-vildagliptin-against-cerebral-ischemia-in-rats" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/90168.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">155</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a 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