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超声波向微气泡化释放的ATP诱导血管炎症,并改善免疫检查点阻塞的有效性
Sepideh Jahangiri1,2,3, Samuel Bourdages1,2,4, Emma Skora2,5
1Microbubble Theranostics Laboratory, Imaging and engineering axis, CHUM Research Center, Montreal, Canada.
Theranostics
|April 30, 2025
概括
超声向微气泡化 (UTMC) 与CD39阻断和免疫检查点阻断相结合,通过增加细胞外ATP (eATP) 和促进T细胞反应,增强抗瘤免疫力. 这种组合疗法显著减少了瘤的生长,并改善了免疫细胞的透.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物医学工程 生物医学工程
背景情况:
- 细胞外ATP (eATP) 作为与损伤相关的分子模式,刺激免疫反应.
- 外核酶CD39和CD73通过将eATP化为免疫抑制分子腺素来调节eATP.
- CD39和CD73在癌症中经常被上调,在免疫瘤学中呈现治疗点.
研究的目的:
- 调查超声向微气泡化 (UTMC) 是否可以调节纯能信号,以增强免疫检查点阻塞 (ICB) 的有效性.
- 在结直肠癌模型中探索UTMC影响ATP释放,炎症和抗瘤免疫力的机制.
主要方法:
- 非废除性UTMC应用于具有或没有CD39抑制的小鼠结直肠瘤模型 (MC38).
- 评估UTMC压力 (400和850kPa) 对瘤血流,eATP释放,血管炎症和癌细胞死亡的影响.
- 评估了UTMC与抗PDL1 (aPDL1) 和CD39阻断对瘤生长,免疫细胞透和免疫细胞排水到瘤排水淋巴结 (TDLNs) 的协同作用.
主要成果:
- 在850kPa的UTMC和CD39淘汰模式中,细胞外ATP (eATP) 度显著增加.
- 这种eATP的增加与加强血管炎症,增加癌细胞死亡和减少瘤细胞增殖相关.
- 结合aPDL1,UTMC和CD39阻断,显著降低了瘤生长,并在瘤和TDLN中改善了抗瘤免疫细胞概况.
结论:
- 通过UTMC调节纯能信号,可以与CD39阻断和ICB协同作用,以增强抗瘤免疫反应.
- 这种综合治疗方法有望提高固体瘤免疫瘤治疗的疗效.
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