有效的抗瘤免疫力可以通过向VISTA与TLR3-特定辅助剂结合,触发
Bo Wang1,2, Ziwei Ou1,2, Wenlong Zhong1,2
1Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen (Zhongshan) University, Guangzhou, P.R. China.
Cancer immunology research
|October 17, 2023
概括
膀癌中的高VISTA表达预示着生存率不佳. 用TLR3辅助剂向VISTA,通过重编程巨细胞和促进T细胞反应,减少瘤生长,显示出转化潜力.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 癌症研究 癌症研究
背景情况:
- 对抗PD-1/PD-L1疗法的耐药性与免疫抑制性内巨有关.
- 维域免疫球蛋白抑制T细胞激活 (VISTA) 是一个关键的免疫检查点,调节T细胞和髓状细胞的活动.
研究的目的:
- 为了研究VISTA在膀癌的预后作用.
- 评估结合VISTA阻塞与TLR3激动剂的治疗潜力.
主要方法:
- 流细胞计和多重体免疫光学被用来分析患者瘤中的VISTA表达.
- 在体外测试中评估了VISTA特有的mAb 13F3对TLR3辅助剂的巨细胞激活的影响.
- 用MB49同基因小鼠模型来测试组合治疗的疗效.
主要成果:
- 增加的VISTA+免疫细胞,特别是VISTA+CD163+巨细胞,与晚期膀癌和患者生存率低下相关.
- 在小鼠中,抗VISTA mAb 13F3和TLR3辅助剂的联合治疗抑制了瘤生长和延长了生存时间.
- 这种组合降低了抗炎性巨细胞和TGFβ1,同时增加了免疫刺激分子和CD8+T细胞/调节性T细胞比率.
结论:
- 膀癌免疫细胞,特别是巨细胞中的高VISTA表达表明预后不利.
- 将VISTA与TLR3特异性辅助剂结合的向治疗为膀癌提供了一个有前途的治疗策略.
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