瘤微环境的差异 指示 T 助手血统 两极化和对免疫检查点治疗的反应
Shiping Jiao1, Sumit K Subudhi2, Ana Aparicio2
1Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center UTHealth, Houston, TX 77030, USA.
免疫检查点治疗 (ICT) 对骨转移的前列腺癌效果较差. 阻断TGF-β增强了Th1反应,改善了骨转移性前列腺癌 (mCRPC) 模型的存活率.
科学领域:
- 癌症学
- 免疫学
- 癌症研究
背景情况:
- 免疫检查点治疗 (ICT) 对转移性抵抗割的前列腺癌 (mCRPC) 是有希望的.
- 然而,在骨转移患者中,ICT的疗效有限.
- 骨髓分析显示,在ICT后,Th1细胞转向Th17细胞.
研究的目的:
- 研究瘤微环境对mCRPCICT反应的影响.
- 阐明阻碍ICT在骨转移中的疗效机制.
- 确定改善骨mCRPC的ICT成果的策略.
主要方法:
- 在小鼠中比较皮下和骨内前列腺瘤模型.
- 在ICT后对瘤内T细胞子集 (Th1,Th17,CD8) 的分析.
- 研究骨质细胞介导的骨质再吸收和TGF-β信号.
- 对结合ICT和TGF-β阻断疗法的评估.
主要成果:
- 通过增加Th1细胞,ICT提高了皮下模型的生存率.
- 在Th17偏振的骨模型中,ICT未能诱导抗瘤反应.
- 瘤诱导的骨质细胞活动释放TGF-β,抑制骨中的Th1发育.
- 与ICT一起阻断TGF-β促进了Th1和CD8T细胞的扩张,导致瘤回归和改善存活率.
结论:
- 骨瘤微环境促进Th17极化,并通过TGF-β阻碍ICT的有效性.
- 针对TGF-β与ICT结合,代表了对骨mCRPC的有希望的治疗策略.
- 这种方法增强了抗瘤T细胞反应,并改善了临床前模型的存活率.
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