美国布莱根妇女医院Stephen J. Elledge团队近期取得重要工作进展,他们研究提出了TScan-II,一种用于鉴定CD4+ T细胞表位的基因组规模平台。相关研究成果2023年11月27日在线发表于《细胞》杂志上。
据介绍,CD4+ T细胞在协调免疫反应和组织稳态中发挥着重要作用。然而,由于目前无法将多肽人类白细胞抗原II类(HLA-II)复合物与其同源T细胞受体(TCR)较好的联系起来,从而阻碍了人们对CD4+ T细胞功能和在病理中的功能理解。
研究人员介绍TScan II,一个高度敏感的基因组CD4+抗原发现平台。该平台无缝集成了合成抗原呈递细胞中的内源性HLA-II抗原处理机制和T细胞中的TCR信号,能够同时筛选多种HLA和TCR。TScan II利用基因组规模的人类、病毒组和表位诱变文库,促进了抗原的从头发现和TCR特异性的深入探索。研究人员通过鉴定癌症活性CD4+ T细胞克隆的非经典抗原,证明了TScan-II在基础研究和转化研究中的潜力。
此外,研究人员鉴定了两种用于干燥病(Sjögren’s disease)中克隆扩增的CD4+ T细胞的抗原,它们结合不同的HLA,并在受影响唾液腺内的HLA II阳性导管细胞中表达。
附:英文原文
Title: TScan-II: A genome-scale platform for the de novo identification of CD4+ T cell epitopes
Author: Mohammad H. Dezfulian, Tomasz Kula, Thomas Pranzatelli, Nolan Kamitaki, Qingda Meng, Bhuwan Khatri, Paola Perez, Qikai Xu, Aiquan Chang, Ayano C. Kohlgruber, Yumei Leng, Ananth Aditya Jupudi, Michelle L. Joachims, John A. Chiorini, Christopher J. Lessard, A. Darise Farris, Senthil K. Muthuswamy, Blake M. Warner, Stephen J. Elledge
Issue&Volume: 2023-11-27
Abstract: CD4+ T cells play fundamental roles in orchestrating immune responses and tissue homeostasis. However, our inability to associate peptide human leukocyte antigen class-II (HLA-II) complexes with their cognate T cell receptors (TCRs) in an unbiased manner has hampered our understanding of CD4+ T cell function and role in pathologies. Here, we introduce TScan-II, a highly sensitive genome-scale CD4+ antigen discovery platform. This platform seamlessly integrates the endogenous HLA-II antigen-processing machinery in synthetic antigen-presenting cells and TCR signaling in T cells, enabling the simultaneous screening of multiple HLAs and TCRs. Leveraging genome-scale human, virome, and epitope mutagenesis libraries, TScan-II facilitates de novo antigen discovery and deep exploration of TCR specificity. We demonstrate TScan-II’s potential for basic and translational research by identifying a non-canonical antigen for a cancer-reactive CD4+ T cell clone. Additionally, we identified two antigens for clonally expanded CD4+ T cells in Sjgren’s disease, which bind distinct HLAs and are expressed in HLA-II-positive ductal cells within affected salivary glands.
来源:科学网
原标题:一种用于鉴定CD4+ T细胞表位的基因组规模平台
作者:小柯