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促进急性髓系白血病细胞抗原呈递功能的药物筛选
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作者 杨晓颖 唐博 +6 位作者 刘绘绘 解伟伟 谢双莲 王文琼 王津 赵珊 董玉君 《中国实验血液学杂志》 北大核心 2025年第5期1305-1311,共7页
目的:筛选有促进急性髓系白血病(AML)细胞抗原加工呈递作用的抗血液肿瘤药物。方法:合成能特异性识别由HLA-A2呈递的WT1抗原肽复合物HLA-A 0201:WT1126-134(RMFPNAPYL)(下文简称HLA-A2:WT1)的TCR样流式抗体,作为检测抗原加工呈递复合体(... 目的:筛选有促进急性髓系白血病(AML)细胞抗原加工呈递作用的抗血液肿瘤药物。方法:合成能特异性识别由HLA-A2呈递的WT1抗原肽复合物HLA-A 0201:WT1126-134(RMFPNAPYL)(下文简称HLA-A2:WT1)的TCR样流式抗体,作为检测抗原加工呈递复合体(APM)功能的方法。分别使用不同浓度的IFN-γ、去甲基化药物、免疫调节剂、蛋白酶体抑制剂和γ分泌酶抑制剂处理AML细胞系THP1,并在不同的药物作用时间点使用流式细胞术检测HLA-ABC、HLA-A2和HLA-A2:WT1复合物的表达变化。结果:合成的TCR样抗体只与HLA-A 0201+WT1+细胞结合,证明了该抗体的特异性。用TCR样抗体检测IFN-γ处理后的肿瘤细胞作为阳性对照,结果显示,HLA-A2:WT1表达增加,验证了该抗体反映APM功能的可靠性。本研究筛选的一系列抗肿瘤药物中,能显著上调HLA-A 0201限制性WT1抗原肽表达的有γ分泌酶(LY-411575)和去甲基化药物(地西他滨和阿扎胞苷)。免疫调节剂来那度胺和泊马度胺在一定的药物浓度和作用时间条件下也能上调HLA-A2:WT1复合物的表达。同样是蛋白酶体抑制剂,卡非佐米能下调HLA-A2:WT1,但硼替佐米对HLA-A2:WT1表达没有明显作用。结论:TCR样抗体能有效地反映肿瘤细胞APM功能,抗血液肿瘤药物可以影响肿瘤细胞抗原加工呈递功能,改变肿瘤免疫原性。 展开更多
关键词 急性髓系白血病 抗原加工呈递复合体(APM) TCR样抗体
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职业性三氯乙烯药疹样皮炎患者周围血T细胞抗原受体Vβ谱系多样性初探 被引量:2
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作者 左璨粲 梁赵佳 +7 位作者 孙润陆 李萡 刘薇薇 陈少华 杨力健 陈嘉榆 余卫 李扬秋 《中国职业医学》 CAS 北大核心 2011年第1期24-27,共4页
目的了解职业性三氯乙烯(TCE)药疹样皮炎(OMLDT)患者周围血T细胞抗原受体(TCR)Vβ亚家族基因谱系及其克隆性增殖情况。方法利用逆转录-聚合酶链反应(RT-PCR)分别检测10名健康人和5例OMLDT患者周围血中24个TCR Vβ基因的互补决定... 目的了解职业性三氯乙烯(TCE)药疹样皮炎(OMLDT)患者周围血T细胞抗原受体(TCR)Vβ亚家族基因谱系及其克隆性增殖情况。方法利用逆转录-聚合酶链反应(RT-PCR)分别检测10名健康人和5例OMLDT患者周围血中24个TCR Vβ基因的互补决定区3(CDR3)。PCR产物进一步经荧光标记和基因扫描分析CDR3长度而确定T细胞的克隆性。结果 10名健康人可检出所有24个TCR Vβ亚家族,5例OMLDT患者周围血仅检出1~6个Vβ亚家族阳性产物,平均表达(2.8±1.9)个Vβ亚家族,β亚家族检出数显著少于健康人(P〈0.01)。OMLDT患者周围血中存在克隆性增殖T细胞,其中以Vβ16亚家族出现克隆性增殖的频率较高。结论 OMLDT患者周围血中TCR Vβ谱系发生改变,这可能是接触TCE后机体细胞免疫功能的异常变化。 展开更多
关键词 职业性三氯乙烯药疹样皮炎(OMLDT) TCRVΒ基因 T细胞亚家族 克隆性T细胞
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Transitioning from native to synthetic receptors:broadening T-cell engineering and beyond
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作者 Li Yu Yue Liu Xin Lin 《Cellular & Molecular Immunology》 2025年第7期712-729,共18页
T-cell immunotherapy has progressed rapidly,evolving from native T-cell receptor biology to the development of innovative synthetic receptors that extend therapeutic applications beyond cancer.This review explores eng... T-cell immunotherapy has progressed rapidly,evolving from native T-cell receptor biology to the development of innovative synthetic receptors that extend therapeutic applications beyond cancer.This review explores engineering strategies,ranging from natural TCRs to synthetic receptors,that increase T-cell activation and therapeutic potential.We begin by highlighting the foundational role of native receptors in the T-cell response,emphasizing how these structural and functional insights inform the design of next-generation synthetic receptors.Comparisons between CAR and TCR-like synthetic receptors underscore their respective advantages in specificity,efficacy,and safety,as well as potential areas for further improvement.In addition,gene editing technologies such as CRISPR-Cas9 enable precise modifications to the T-cell genome,enhancing receptor performance and minimizing immunogenic risks.In addition to tumors,these engineered T cells can be directed against viral infections,autoimmune disorders,and other diseases.We also explore advanced strategies that engage multiple immune cell types to achieve synergistic,durable responses.By demonstrating how native and synthetic receptors collectively drive innovation,this review aims to inspire new research directions and ultimately expand the scope of T-cell engineering for universal therapeutic applications. 展开更多
关键词 T-cell receptor CAR tcr-like receptors IMMUNOTHERAPY
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Novel chimeric antigen receptor T cells based on T-cell receptor-like antibodies
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作者 Qi Zhao 《Blood Science》 2019年第2期144-147,共4页
The need for novel therapeutics against human cancers such as leukemias and solid tumors is well recognized.Human T cells are poised to make a fundamental change in the therapeutic approach.T-cell interaction with a t... The need for novel therapeutics against human cancers such as leukemias and solid tumors is well recognized.Human T cells are poised to make a fundamental change in the therapeutic approach.T-cell interaction with a tumor cell is a critical event and primarily driven by T-cell receptor(TCR)recognition of peptide in the pocket HLA.However,among TCR-based T-cell therapies,either TCR mismatching or the low density of major histocompatibility complex causes tumor cells to escape from the immune response.TCR molecules have low binding affinities,preventing their recognitions.Undoubtedly,antibody therapeutics is an effective treatment for cancer.As the new generation of monoclonal antibodies,TCR-like antibodies can mimic TCR recognition but are not susceptible for mechanisms of tumor evasion from the immune response.As chimeric antigen receptor(CAR)structure expressed on the surface of T cells,TCR-like antibodies can confer antigen specificity to T cells.The new TCR-like CAR may be important to drive new technologies of adoptive cell therapy,in particular,T-cell therapy,and open possibilities to target endogenous tumor-specific antigens. 展开更多
关键词 ANTIBODY CAR T cell tcr-like antibody
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