CELL INTELLIGENCE · 肿瘤细胞治疗研究
肿瘤细胞治疗研究
英文原题:Polymerised superparamagnetic antigen presenting cell lymphocyte capture for enriching tumour reactive T-cells and neoantigen identification.
Polymerised superparamagnetic antigen presenting cell lymphocyte capture for enriching tumour reactive T-cells and neoantigen identification.
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T 淋巴细胞与同源靶标之间通过免疫突触(IS)形成实现的超灵敏抗原识别,使基于活细胞的抗原特异性 T 细胞检测成为可能。
然而,不可预测的抗原加工和主要组织相容性复合体(MHC)周转限制了特异性。在此,我们开发了胞内聚合的抗原呈递细胞(pAPC),通过动力学驱动的加载实现模块化、持久的抗原展示。尽管 pAPC 无生命,但其模拟细胞相互作用,诱导 IS 标志性特征,如超分子活化簇形成、细胞骨架收缩和胞吐作用。掺入超顺磁性纳米颗粒可实现抗原特异性 T 细胞的无标记磁性分离,在灵敏度和特异性上超越 MHC 偶联磁珠。在荷瘤宿主中,pAPC 富集肿瘤反应性淋巴细胞,增强过继性 T 细胞治疗和新抗原特异性 T 细胞鉴定。
此外,来自表达单价人 MHC 的工程化细胞的 pAPC 可从人外周血单个核细胞和人白细胞抗原转基因小鼠中富集病毒特异性和肿瘤特异性 CD8 T 细胞,证明这种细胞-凝胶混合平台在精确抗原特异性 T 细胞捕获方面的潜力。
Ultrasensitive antigen recognition between T lymphocytes and cognate targets via immunological synapse (IS) formation enables live cell-based antigen-specific T cell detection.
However, unpredictable antigen processing and major histocompatibility complex (MHC) turnover limit specificity.
Here, intracellularly polymerized antigen-presenting cells (pAPCs) are developed for modular, persistent antigen display via kinetically driven loading. Although inanimate, pAPCs mimic cellular interactions, inducing IS hallmarks such as supramolecular activation cluster formation, cytoskeletal contraction, and trogocytosis.
Incorporation of superparamagnetic nanoparticles allows label-free magnetic isolation of antigen-specific T cells, surpassing MHC-conjugated beads in sensitivity and specificity. In tumor-bearing hosts, pAPCs enrich tumor-reactive lymphocytes, enhancing adoptive T cell therapy and neoantigen-specific T cell identification.
Additionally, pAPCs from engineered cells expressing monovalent human MHC enrich virus- and tumor-specific CD8 T cells from human peripheral blood mononuclear cells and human leukocyte antigen-transgenic mice, demonstrating the potential of this cell-gel hybrid platform for precise antigen-specific T cell capture.
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