Blood:TIGIT阻滞可恢复CD8+T细胞功能,抑制多发性骨髓瘤进展

2018-07-10 MedSci MedSci原创

中心点:多发性骨髓瘤(MM)进展时,CD8+T细胞的TIGIT表达上调,与其效应功能受损相关。TIGIT缺陷或阻滞可保护小鼠免受多发性骨髓瘤侵害,并可增强骨髓瘤患者CD8+T细胞的效应功能。摘要:免疫疗法为治疗多发性骨髓瘤(MM)带来新的希望,但迄今为止,尚未证实单独应用靶向程序性细胞死亡蛋白1(PD-1)的免疫检查点阻滞可有效治疗该疾病。T细胞免疫球蛋白和ITIM结构域(TIGIT)是目前所知道

中心点:

多发性骨髓瘤(MM)进展时,CD8+T细胞的TIGIT表达上调,与其效应功能受损相关。

TIGIT缺陷或阻滞可保护小鼠免受多发性骨髓瘤侵害,并可增强骨髓瘤患者CD8+T细胞的效应功能。

摘要:

免疫疗法为治疗多发性骨髓瘤(MM)带来新的希望,但迄今为止,尚未证实单独应用靶向程序性细胞死亡蛋白1(PD-1)的免疫检查点阻滞可有效治疗该疾病。T细胞免疫球蛋白和ITIM结构域(TIGIT)是目前所知道的另外一种负性调节T细胞功能的免疫检查点受体。

Camille Guillerey等人对TIGIT阻滞释放免疫反应抗MM的治疗潜能进行深入研究。研究结果发现,在小鼠和人类中,MM进展均与CD8+T细胞上的TIGIT表达水平高相关。MM患者来源的TIGIT+CD8+T细胞功能异常,特点是在炕CD3/CD28/CD2或骨髓瘤抗原刺激下,细胞增殖减少、不能产生细胞因子。

而且,TIGIT缺陷小鼠受Vk*MYC小鼠的MM细胞刺激时,其与降低肿瘤负担和延长存活期相关的血清M蛋白水平降低,提示TIGIT可限制抗骨髓瘤的免疫反应。更重要的是, 用单克隆抗体(mAbs)阻滞TIGIT可增强MM患者的CD8+T细胞的效应功能、抑制MM进展。

总而言之,本研究揭示了TIGIT在MM中的免疫抑制作用,支持开发TIGIT阻滞疗法用于治疗MM患者。

原始出处:

Camille Guillerey,et al.TIGIT immune checkpoint blockade restores CD8+ T cell immunity against multiple myeloma.Blood  2018  :blood-2018-01-825265;  doi: https://doi.org/10.1182/blood-2018-01-825265

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    2018-10-31 gds2009
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    2019-02-28 jml2009
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