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Chromium-51 Radionuclide

铬-51放射性核素

Company: PerkinElmer
Catalog#: NEZ030S002MC
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Chromium-51 (51Cr) Release Assay to Assess Human T Cells for Functional Avidity and Tumor Cell Recognition
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2016-08-20
[Abstract]  Cytotoxic CD8+ T cells are able to specifically recognize and kill target cells through specific interaction between their T cell receptors (TCRs) and small immunogenic peptides (antigens) presented by major histocompatibility complex (MHC) molecules. The antigen recognition capacity and in vitro lytic activity of antigen-specific cytotoxic T cells can be assessed functionally in the so-called chromium 51 (51Cr) release assay, which was developed almost 50 years ago in our institution (Brunner et al., 1968). Radioactively-labelled cells deficient for endogenous antigen presentation [e.g., transporter for antigen presentation (TAP)-deficient T2 cells] and stably transfected with the MHC of interest (e.g., HLA-A2+) are ... [摘要]  细胞毒性CD8 + T细胞能够通过其T细胞受体(TCR)与主要组织相容性复合物(MHC)分子呈递的小免疫原性肽(抗原)之间的特异性相互作用特异性识别和杀死靶细胞。抗原特异性细胞毒性T细胞的抗原识别能力和体外裂解活性可以在所谓的铬51(<51> Cr)释放测定中功能性评估,其是几乎50年前在我们的机构中​​发展起来的(Brunner等人,1968年)。放射性标记的内源性抗原呈递缺陷的细胞[例如,用于抗原呈递(TAP)缺陷型T2细胞的转运蛋白],并用感兴趣的MHC稳定转染(例如 ,HLA-A2 sup + +)通常在这个4小时测定期间用作靶标。或者,内源性呈递免疫原性抗原的Cr标记的病毒感染或肿瘤细胞系可以作为靶细胞(例如,用于评估肿瘤识别)。  在肽滴定测定(部分A)中,用抗原性肽的系列稀释物对放射性标记的靶细胞进行脉冲,并在效应物(例如,CD8 + T细胞克隆)与靶细胞( Cr-T2细胞)比(E:T)为10:1的混合物在96孔V型底板中37℃温育4小时。在肿瘤杀伤试验(B部分)中,将细胞毒性CD8 ...

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