针对线粒体的纳米辅助剂诱导了多功能免疫微环境重塑,以使瘤敏感,放射免疫治疗
Zaigang Zhou1,2, Cheng Li1, Chao Li1
1Department of Urology, The Third Xiangya Hospital of Central South University, Changsha, 410013, China.
概括
这项研究介绍了IR-LND@Lip纳米辅助剂,通过抑制原,编程死亡配体1 (PD-L1) 和转化生长因子-β (TGF-β) 来克服瘤障碍物. 这种组合疗法显著提高了放射治疗 (RT) 对固体瘤的疗效.
科学领域:
- 生物医学工程 生物医学工程
- 癌症研究 癌症研究
- 免疫治疗是一种免疫疗法.
背景情况:
- 原阻碍了抗瘤免疫力和固体瘤的放射治疗 (RT).
- 放射治疗 (RT) 可以通过编程死亡连接体1 (PD-L1) 和转化生长因子-β (TGF-β) 介导的DNA修复和免疫排除来限制.
- 目前的治疗方法难以同时解决这些多方面的障碍,以实现有效的RT.
研究的目的:
- 通过氧化酸化抑制剂来诱导线粒体功能障碍以共同抑制PD-L1,原和TGF-β的潜力.
- 开发和评估一种新的纳米辅助剂,IR-LND@Lip,用于增强癌症免疫治疗.
- 评估IR-LND@Lip和RT在临床前瘤模型中的联合疗效.
主要方法:
- 通过将线粒体向的IR-68与隆尼达胺 (LND) 结合,合成了IR-LND.
- 将IR-LND封装到脂质体 (Lip) 中,形成IR-LND@Lip纳米辅助剂.
- 在膀和乳腺瘤模型中评估IR-LND@Lip和RT的联合治疗,评估瘤生长,DNA损伤和免疫激活.
主要成果:
- IR-LND@Lip有效诱导线粒体功能障碍,导致PD-L1,原和TGF-β的联合抑制.
- 纳米辅助剂通过增加DNA损伤并通过免疫激活将"冷"瘤转化为"热"瘤来使RT敏感.
- 结合RT和IR-LND@Lip治疗导致膀和乳腺瘤生长的显著抑制.
结论:
- 由LND诱导的线粒体功能障碍提供了一个多免疫通路调节策略.
- IR-LND@Lip纳米辅助剂是克服RT耐药性的有希望的策略.
- 在临床前模型中,RT和IR-LND@Lip的联合治疗显示出强大的抗瘤活性.
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