通过p53突变量身定制的免疫疗法使免疫阻断性卵巢瘤敏感
Rishita Chatterjee1, Arturo Simoni-Nieves1, An Truong2
1Department of Immunology and Regenerative Biology, Systems immunology, Weizmann Institute of Science, Rehovot, 76100, Israel.
bioRxiv : the preprint server for biology
|July 16, 2025
概括
卵巢癌中特定的p53突变会产生免疫抑制的环境. 用双抗体准调节性T细胞和PD-1/PD-L1通路,有效抑制了p53-R273H突变的瘤.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 高度血清性卵巢癌 (HGSOC) 对免疫检查点抑制剂 (ICI) 的反应不佳.
- 这种有限的疗效部分是由于由p53突变驱动的免疫抑制性瘤微环境.
- 在HGSOC中,p53异常几乎是普遍存在的,这凸显了它们的关键作用.
研究的目的:
- 研究特定的p53突变在HGSOC中塑造瘤免疫微环境中的作用.
- 确定针对不同p53突变配置文件的潜在治疗策略.
- 以特定突变的方式评估向调节性T细胞 (Tregs) 和PD-1/PD-L1轴的疗效.
主要方法:
- 使用具有特定p53突变 (p53-R270H和p53-R172H) 的免疫能力较强的小鼠模型.
- 分析了患者数据集,以将p53突变与免疫标记物 (PD-L1,amphiregulin) 相关联.
- 在小鼠模型和患者衍生器官中使用针对安菲雷古林 (AREG) 和PD-L1的双抗体疗法.
主要成果:
- 这种p53-R270H突变 (人体R273H等效) 显示出对Tregs和PD-1/PD-L1轴的依赖.
- 患者的PD-L1和AREG水平升高与R273H突变有关.
- 针对AREG和PD-L1的双抗体疗法选择性地抑制了R270H瘤,导致M1巨分化,CD8+T细胞透和中性粒细胞减少.
- 组合治疗降低了患者衍生的R273C有机体中的CD4/CD8比率.
结论:
- 建立了针对HGSOC.的突变量身定制的治疗方法.
- 证明了向AREG和PD-L1对p53-R273H突变瘤是有效的.
- 利用p53在调节针对性癌症治疗的免疫抑制机制中的作用.
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