改造的细菌外膜囊泡增强了瘤免疫疗法,通过重塑瘤层和针对性地输送CD73siRNA
Lili Cheng1, Dan Peng1, Zhuoyin Liu1
1School of Biomedical Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen, Guangdong, 518107, PR China.
Biomaterials
|September 26, 2025
概括
工程化细菌外膜囊泡 (OMVs) 降解瘤细胞外基质,并提供siRNA来抑制CD73,增强免疫疗法并减少瘤生长和转移.
科学领域:
- 生物技术是生物技术.
- 癌症研究 癌症研究
- 免疫治疗是一种免疫疗法.
背景情况:
- 瘤微环境 (TME) 细胞外基质 (ECM) 阻碍药物输送和免疫透.
- 瘤缺氧激活CD73-腺酸轴,促进血管生成和转移.
研究的目的:
- 开发一个工程外膜囊泡 (OMV) 平台,用于针对性地传递CD73siRNA (siCD73).
- 重新编程免疫抑制TME并增强抗瘤免疫疗法.
主要方法:
- 基因和化学工程的细菌OMV表达氨基酶 (HAase) 进行ECM降解.
- 用3 - 氨基基酸 (PBA) 修改OMV的表面,以向瘤和溶酶体逃逸.
- 传递siCD73以抑制CD73表达和相关的信号通路.
主要成果:
- 工程OMV降解了富含HA的ECM,增强了瘤透和药物保留.
- siCD73的输送导致了4.6倍的CD73抑制,抑制了瘤细胞和癌症相关纤维细胞 (CAF) 迁移,入侵和粘附.
- ECM降解缓解了瘤缺氧,抑制了CAFs, stromal沉积和血管生成.
- OMVs表现出内在的免疫刺激性质,促进M1巨细胞的两极化,树突细胞的成熟和细胞毒性T细胞的透.
结论:
- 设计的OMV平台有效地重新编程了免疫抑制TME.
- 这一策略在对抗原发性,复发性和转移性瘤方面表现出显著的治疗疗效.
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