实用医学杂志 ›› 2026, Vol. 42 ›› Issue (15): 2722-2729.doi: 10.3969/j.issn.1006-5725.2026.15.007

• 肿瘤诊治与预后专栏 • 上一篇    

血小板来源PD-L1在肿瘤血行转移中的免疫抑制效应及其靶向治疗策略

姜佳宬1,2,马洁3,朱伟1()   

  1. 1.江苏大学,临床医学与医学检验学院,(江苏 镇江 212013 )
    3.江苏大学,基础医学与公共卫生学院,(江苏 镇江 212013 )
    2.丹阳市人民医院检验科 (江苏丹阳 212300 )
  • 收稿日期:2026-05-28 修回日期:2026-06-24 接受日期:2026-06-26 出版日期:2026-08-10 发布日期:2026-08-13
  • 通讯作者: 朱伟 E-mail:zhuwei@ujs.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(32270964)

Immunosuppressive effects and targeted therapeutic strategies of platelet-derived PD-L1 in hematogenous tumor metastasis

Jiacheng JIANG1,2,Jie MA3,Wei ZHU1()   

  1. 1.School of Clinical Medicine and Medical Laboratory Science,Jiangsu University,Zhenjiang 212013,Jiangsu,China
    3.Department of Laboratory Medicine,the People's Hospital of Danyang,Danyang 212300,Jiangsu,China
    2.School of Basic Medicine and Public Health,Jiangsu University,Zhenjiang 212013,Jiangsu,China
  • Received:2026-05-28 Revised:2026-06-24 Accepted:2026-06-26 Online:2026-08-10 Published:2026-08-13
  • Contact: Wei ZHU E-mail:zhuwei@ujs.edu.cn

摘要:

血小板是血液中仅次于红细胞的细胞成分,传统上被认为主要是参与止血与血栓形成。血小板表面表达的程序性死亡配体1(PD-L1),可直接抑制T细胞功能;此外,血小板还能通过包裹循环肿瘤细胞(CTCs)形成物理屏障,协同放大免疫抑制信号,构成肿瘤血行转移中的移动免疫屏障。本综述系统总结了血小板PD-L1(pPD-L1)的来源与调控机制,提出pPD-L1介导免疫逃逸的三重抑制模型;继而揭示了pPD-L1作为液体活检标志物,在逆转免疫检查点抑制剂(ICIs)耐药、抑制肿瘤血行转移方面的重要地位,为靶向pPD-L1的精准治疗提供理论依据。

关键词: 血小板, 程序性死亡配体1, 免疫逃逸, 血行转移, 免疫检查点抑制剂, 抗血小板治疗

Abstract:

Platelets are the second most abundant cellular component in blood after erythrocytes and have traditionally been recognized primarily for their roles in hemostasis and thrombosis. The expression of programmed death-ligand 1 (PD-L1) on the platelet surface enables direct inhibition of T cell function. Moreover, platelets can form a physical barrier by surrounding circulating tumor cells (CTCs), thereby amplifying immunosuppressive signals synergistically and establishing a mobile immune barrier during hematogenous tumor metastasis. This review systematically summarizes the origin and regulatory mechanisms of platelet PD-L1 (pPD-L1) and proposes a triple-inhibition model of immune evasion mediated by pPD-L1. Furthermore, it highlights the critical role of pPD-L1 as a liquid biopsy biomarker in reversing resistance to immune checkpoint inhibitors (ICIs) and suppressing hematogenous tumor metastasis, providing a theoretical basis for precision therapies targeting pPD-L1.

Key words: platelets, programmed death-ligand 1, immune evasion, hematogenous metastasis, immune checkpoint inhibitors (ICIs), antiplatelet therapy

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