ECIA™ T Cell ELISpot Service

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A highly selective antigen-specific cells lineage involves and activates that process. The goal of immune diagnosis is to reliably identify a little part of responders and confirm their mode of action as well as the degree of response. The individual antigen is difficult to be recognized by T cells in most cases. Hence, the techniques of measuring T cell immune responses must be sensitive, high-throughput, and widely adopted. </p> <p> The Enzyme-Linked ImmunoSpot (ELISpot) assay not only measures the magnitude and quality of T cells immunity through detecting antigen-specific T cells that involve in the secretion of cytokines and other utility but also detects the protein secretion from the single cell. Compared to other assays, the ELISpot assay can be utilized to detect the population and frequency of specific proteins such as cytokines and antigen-specific antibodies. T cells ELISpot is much more reproducible and sensitive than other measurements like cytokine measurements in detecting low-frequency antigen-specific CD4<sup>+</sup> and CD8<sup>+</sup> T cells. More than that, this accurate assay can also validate new T cell epitopes. </p> <h2 class="h2_tit page_tab_margin" id="tab2"> ECIA™ T Cells ELISpot Assay Platform </h2> <p> <strong>Creative Biolabs</strong> has developed and optimized the ECIA™ T Cells ELISpot Assay platform. Relying on the excellent sensitivity and resolution, ECIA™ T cells ELISpot assay is able to provide a multidimensional, quantitative assessment of effector function at the single cell level. And it is the first choice for the development of multifunctional T cell analysis in the areas of drug research and preclinical trials. </p> <p> The ELISpot assay is a kind of technique convergence based on ELISA and Western blotting. The cells are stimulated to produce local cytokines that are captured by specific monoclonal antibody coated onto a PVDF-backed microplate. After the cells are disintegrated, a biotin-labeled antibody specific for the chosen cytokine is added to bind the captured cytokines. Following a wash to remove any unbound biotinylated antibody, the detected cytokine is then visualized using streptavidin conjugated to alkaline phosphatase and a precipitating substrate (e.g., BCIP/NBT). Purple spots will emerge in the PVDF plate. Once the signal is developed, the number of spots can be calculated manually, or by using an image-based spot reader and the accompanying analysis software. By comparing the number of the control wells, the frequency and the total number of responding cells can be determined. </p> <h2 class="h2_tit page_tab_margin" id="tab3"> General steps of the ECIA™ T cells ELISpot assay </h2> <ul class="ullist disc"> <li> According to the customers’ project plan, the samples will be collected by Creative Biolabs. </li> <li> Creative Biolabs carries out the standard operating procedure of ECIA™ T cells ELISpot assay step-by-step. The experimental protocol could be adjusted according to the customs’ requirements. </li> <li> Analysis report will be available in approximate one month. </li> </ul> <h2 class="h2_tit page_tab_margin" id="tab4"> Service projects: </h2> <ul class="ullist disc"> <li> Human IFN gamma, IL-2, -4, -7, Granzyme B, TNT alpha and others </li> <li> CD8<sup>+</sup> and CD4<sup>+</sup> T cell responses </li> <li> Immune monitoring </li> <li> T cell epitope discovery and validation </li> <li> HLA tissue typing of donor </li> </ul> <br /> <p> Other optional <a href="/ECIA.html">ECIA™ cellular analysis services</a>: </p> <ul class="ullist"> <li> <a href="/HLA-Tissue-Typing.html">ECIA™ HLA Tissue Typing Service</a> </li> <li> <a href="/ECIA-B-Cell-ELISpot-Assay.html">ECIA™ B Cell ELISpot Assay</a> </li> <li> <a href="/ECIA-Intracellular-Cytokine-Staining-Assay.html">ECIA™ Intracellular Cytokine Staining Assay</a> </li> <li> <a href="/ECIA-CFSE-T-Cell-Proliferation-Assay.html">ECIA™ CFSE T Cell Proliferation Assay</a> </li> <li> <a href="/ecia-veterinary-cellular-analysis.html">ECIA™ Veterinary Cellular Analysis</a> </li> </ul> <h2 class="h2_tit page_tab_margin" id="tab5"> Published Data </h2> <ul class="ullist"> <li> <strong>Immunological Assessment Using T cell ELISpot Assays</strong> </li> </ul> <p class="show-center"> <img loading="lazy" src="static/img/1-2-8-2-3-t-cell-elispot-assay-1.jpg" width="350" height="171" alt="" />Fig. 1 Frequency of apoptotic cells pre- and post PBMC testing in the ELISPOT assay. (Marie Wunsch, 2015) </p> <p> The article demonstrates the research significance of apoptotic cell numbers in improving Peripheral Blood Mononuclear Cells (PBMC) quality criteria for T cell assays. It highlights that serial measurements of apoptotic cells, both pre and post-T cell assay, provide a more accurate assessment of PBMC quality than a single pre-assay measurement. The results indicate that the presence of apoptotic bystander cells does not impair T cell functionality in the ELISPOT assay, which measures T cell response by counting spot-forming cells that secrete specific cytokines in response to antigens. This finding is critical for clinical settings, suggesting that monitoring apoptotic cells at multiple points can serve as a robust indicator of sample quality, thus ensuring the reliability of immunological assessments using T cell ELISpot assays. </p> <div class="reference"> <strong>Reference</strong> <ol class="ollist decimal"> <li> Wunsch, Marie, et al. "Serial measurements of apoptotic cell numbers provide better acceptance criterion for PBMC quality than a single measurement prior to the T cell assay." <em>Cells</em> 4.1 (2015): 40-55. </li> </ol> </div> <script type="text/javascript"> window.addEventListener('load',function(){ faqlist(4); }); </script> <h2 class="h2_tit page_tab_margin" id="tab6"> FAQ </h2> <ol class="ollist faqlist"> <li> <span class="sFAQTit">What is the T cell ELISpot assay used for?</span> <p> The T cell ELISpot assay is utilized primarily to measure the immune response by detecting and quantifying cytokine-producing cells at the single-cell level. This assay is particularly valuable in vaccine development and immune monitoring, allowing researchers to assess the effectiveness of vaccines and immunotherapies by evaluating T cell activation. </p> </li> <li> <span class="sFAQTit">How does the T cell ELISpot assay work?</span> <p> The T cell ELISpot assay involves isolating peripheral blood mononuclear cells (PBMCs) and stimulating them with specific antigens. Upon activation, T cells release cytokines, which are captured by cytokine-specific antibodies pre-coated on a membrane-based plate. Spots form at the site of cytokine release, each representing a single cytokine-secreting cell. </p> </li> <li> <span class="sFAQTit">What types of cells can be analyzed using the T cell ELISpot assay?</span> <p> The T cell ELISpot assay can analyze any cytokine-secreting cell, but it is most commonly used to assess specific T cell responses. It can evaluate both CD4+ helper T cells and CD8+ cytotoxic T cells, depending on the cytokine being targeted (e.g., IFN-gamma, IL-2, IL-4). </p> </li> <li> <span class="sFAQTit">What are the advantages of using the T cell ELISpot assay over other methods?</span> <p> The T cell ELISpot assay is highly sensitive, capable of detecting low-frequency cytokine-secreting cells. It offers quantitative results and can be used with minimal sample volumes, making it more efficient than methods like flow cytometry or cytokine bead arrays, especially in scenarios where cell numbers are limited. </p> </li> <li> <span class="sFAQTit">What cytokines can be detected with the T cell ELISpot assay?</span> <p> The T cell ELISpot assay can detect a wide range of cytokines, including but not limited to IFN-gamma, IL-2, IL-4, IL-5, IL-10, and IL-17. The choice of cytokine depends on the type of immune response being studied, such as Th1, Th2, or Th17 responses. </p> </li> </ol> <h2 class="h2_tit page_tab_margin" id="tab7"> Resources </h2> <p> Use the resources in our library to help you understand your options and make critical decisions for your study. </p> <div class="tab_nav"> <span class="tab_choosebg">Videos</span><span>Articles</span> </div>  <div class="tab_cont" style="display:block;"> <div class="row pagerow_pt"> <div class="col-md-4"> <div class="pagerow_pt_unit"> <img loading="lazy" src="../static/img/immunogenicity-overview-of-therapeutic-biologics.jpg" alt="" /> </div> <a href="https://youtu.be/J430752_dTo" target="_blank">Immunogenicity overview of therapeutic biologics</a> </div> </div> </div>  <div class="tab_cont"> <div class="row pagerow_pt"> <div class="col-md-4"> <div class="pagerow_pt_unit_2"> <img loading="lazy" src="static/img/4-2-14-immune-monitoring-for-immunogenicity-assessment-1.jpg" alt="" /> </div> <a href="/immune-monitoring-for-immunogenicity-assessment.html">Immune Monitoring for Immunogenicity Assessment</a> </div> <div class="col-md-4"> <div class="pagerow_pt_unit_2"> <img loading="lazy" src="static/img/4-2-14-current-immunogenicity-evaluation-systems-a-deep-dive-by-creative-biolabs-1.jpg" alt="" /> </div> <a href="/current-immunogenicity-evaluation-systems.html">Current Immunogenicity Evaluation Systems: A Deep Dive by Creative Biolabs</a> </div> <div class="col-md-4"> <div class="pagerow_pt_unit_2"> <img loading="lazy" src="static/img/4-2-14-1-in-silico-immunogenicity-assessment-the-leading-edge-approach-to-drug-development-1.jpg" alt="" /> </div> <a href="/in-silico-immunogenicity-assessment-the-leading-edge-approach-to-drug-development.html"><i>In Silico</i> Immunogenicity Assessment: The Leading-edge Approach to Drug Development</a> </div> <div class="col-md-4"> <div class="pagerow_pt_unit_2"> <img loading="lazy" src="static/img/4-2-14-4-how-to-evaluate-the-immunogenicity-of-therapeutic-protein-drugs-in-vivo-1.jpg" alt="" /> </div> <a href="/how-to-evaluate-the-immunogenicity-of-therapeutic-protein-drugs-in-vivo.html">How to Evaluate the Immunogenicity of Therapeutic Protein Drugs <i>In Vivo</i></a> </div> <div class="col-md-4"> <div class="pagerow_pt_unit_2"> <img loading="lazy" src="static/img/4-2-14-5-the-origin-and-detection-methods-of-anti-drug-antibodies-1.jpg" alt="" /> </div> <a href="/the-origin-and-detection-methods-of-anti-drug-antibodies.html">The Origin and Detection Methods of Anti-Drug Antibodies</a> </div> <div class="col-md-4"> <div class="pagerow_pt_unit_2"> <img loading="lazy" src="static/img/4-2-14-1-8-immunogenic-risk-assessment-of-therapeutic-proteins-1.jpg" alt="" /> </div> <a href="/immunogenic-risk-assessment-of-therapeutic-proteins.html">Immunogenic Risk Assessment of Therapeutic Proteins</a> </div> <div class="col-md-4"> <div class="pagerow_pt_unit_2"> <img loading="lazy" src="static/img/anti-drug-antibody-introduction-1.jpg" alt="" /> </div> <a href="/anti-drug-antibody-introduction.html">Anti-Drug Antibody Introduction</a> </div> </div> </div> <script> window.addEventListener('load',function(){ // $(function () { $(".tab_nav span").click(function(){ var eqindex=$(this).index(); $(this).addClass("tab_choosebg"); $(this).siblings("span").removeClass("tab_choosebg"); $(".tab_cont").hide().eq(eqindex).show(); }) // }) }); </script><br> <p class="pronote"><i class="fa fa-exclamation-triangle"></i>All listed services and products are For Research Use Only. 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