质子治疗抑制了头部和部状细胞癌中的外体细胞生产
Ameet A Chimote1, Maria A Lehn2, Jay Bhati1
1Division of Nephrology, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45267, USA.
Cancers
|March 13, 2024
概括
质子疗法 (PT) 显著减少了头部和部状细胞癌 (HNSCCs) 的外体细胞生产. 外体的这种减少可能通过限制瘤微环境中的免疫抑制来增强抗瘤免疫反应.
科学领域:
- 在瘤学瘤学.
- 辐射瘤学 辐射瘤学
- 免疫学 免疫学 免疫学
背景情况:
- 质子疗法 (PT) 为头癌提供了光子疗法 (XRT) 的毒性较低的替代方案.
- 有效的癌症治疗需要在瘤微环境 (TME) 内的强有力的抗瘤免疫反应.
- 瘤衍生的外体细胞可以抑制免疫细胞,但PT在HNSCC中对这些外体细胞的作用尚不清楚.
研究的目的:
- 调查质子疗法对头部和部状细胞癌 (HNSCCs) 外体细胞生产的影响.
- 为了比较从质子辐射HNSCC细胞与光子辐射细胞的外体的免疫抑制作用.
主要方法:
- 主要的HNSCC细胞被照射了PT或XRT的5Gy.
- 外体被从细胞培养超级生物中分离出来.
- 分析了外体的数量和免疫抑制潜力 (由PBMCs释放IFN-γ).
主要成果:
- 与XRT和非辐射细胞相比,质子疗法 (PT) 减少了75%的外体细胞生成.
- 外体细胞生产的这种减少在辐射后持续了长达五天.
- 来自PT辐射细胞的外体细胞表现出类似于来自XRT辐射细胞的免疫抑制作用.
结论:
- 质子疗法减少了由HNSCC细胞释放的免疫抑制外体的数量.
- 这种通过PT减少外体细胞的产生可能会增强抗瘤免疫力.
- 通过调节外体介导免疫抑制,PT具有改善癌症免疫监测的潜力.
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