骨转移减少了对检查点阻断免疫疗法的骨外反应,通过产生骨质的骨质细胞
Jia-Nan Cheng1, Zheng Jin2, Chunxia Su3
1Institute of Cancer, Xinqiao Hospital, Third Military Medical University, Chongqing 400037, China; Chongqing Key Laboratory of Immunotherapy, Chongqing 400037, China.
Cancer cell
|April 25, 2025
概括
骨转移导致对由骨质细胞产生的骨质质素 (OPN) 阻断免疫检查点 (ICB) 的抵抗. 阻断骨质细胞活动或OPN恢复了ICB的疗效,为癌症患者提供了新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 癌症转移 癌症转移
背景情况:
- 免疫检查点阻塞 (ICB) 疗法在患有骨转移性病变的患者中显示出有限的疗效.
- 骨转移影响全身抗瘤免疫力的机制尚不清楚.
研究的目的:
- 为了研究骨转移对免疫检查点阻塞 (ICB) 在骨外瘤中的疗效的影响.
- 阐明由骨转移引起的ICB耐药性的潜在机制.
- 确定潜在的治疗点,以克服骨转移患者的ICB抵抗.
主要方法:
- 对多个临床队列和各种癌症转移的小鼠模型的分析.
- 研究骨质细胞和骨质素 (OPN) 在骨转移和骨外瘤之间调解沟通中的作用.
- 在临床前模型中评估治疗策略,包括α-RANKL (αRANKL) 阻断,OPN中和骨质细胞特异性OPN枯竭.
- 在接受αRANKL和ICB联合治疗的临床队列中验证治疗策略.
主要成果:
- 发现骨转移的存在会在体内其他部位的瘤中诱导对ICB的抵抗.
- 骨转移中的骨质细胞被确定为关键介导体,产生骨质素 (OPN),它循环并重编程瘤微环境.
- OPN 损害了T细胞招募和重要的CD8+TCF1+前体细胞的分化,从而降低了ICB的疗效.
- 在小鼠中通过αRANKL阻塞,OPN中和或骨质细胞特异性OPN枯竭恢复了ICB反应.
- 与αRANKL和ICB的联合治疗在临床研究中显示出治疗效益.
结论:
- 骨转移会产生一种免疫抑制环境,通过调节骨质细胞活性和骨质素生产来赋予对ICB的抵抗力.
- 骨质细胞生成被确定为改善骨转移患者ICB结果的关键目标.
- 针对骨微环境提供了一个有希望的策略,以提高癌症免疫治疗的有效性.
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