单细胞RNA测序揭示了Granzyme K+ CD8+ T细胞作为减轻辐射后斑块不稳定的目标
Manru Shi1, Quan Lin1, Shaohong Fang2,3
1Department of Radiation Oncology Harbin Medical University Cancer Hospital Harbin Heilongjiang Province China.
Journal of the American Heart Association
|September 6, 2025
概括
放射治疗可以通过激活特定的细胞毒性T细胞来破坏心脏斑块的稳定性. 向格兰酶B (GZMB) 可能会减少辐射引起的心血管损伤.
科学领域:
- 心血管研究
- 免疫学
- 放射治疗 瘤学
背景情况:
- 胸部癌症患者患有冠状动脉疾病后的心脏问题正在增加.
- 放射治疗引起的斑块不稳定性和成像变化的机制尚不清楚.
研究的目的:
- 使用单细胞RNA测序确定放射治疗后易受损伤的斑块的关键特征.
- 研究放射治疗对动脉样硬化病变和免疫细胞动态的影响.
主要方法:
- 在子中进行双模式OCT-IVUS成像,以评估斑块稳定性.
- 在ApoE-/-小鼠的动脉样损伤上进行单细胞RNA测序.
- 生物信息学,病理染色,流细胞测量,基因淘汰和抗体消耗.
主要成果:
- OCT-IVUS精确评估了辐射对斑块稳定的影响.
- 单细胞转录组显示了放射治疗引起的免疫重塑.
- 鉴定了一种表达GZMB的K+CD8+T细胞亚群,使病变恶化.
- 缺少CD8+T细胞或GZMB改善了病变的进展.
结论:
- 鉴定出因辐射损伤造成的典型动脉成像变化.
- 辐射通过GZMK+ CD8+ T细胞激活和GZMB功能影响斑块的稳定性.
- GZMB是放射性心血管损伤的潜在治疗点.
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