可编程的工程细菌作为持续释放抗体的工厂 in situ 增强瘤免疫检查点治疗
Xiao-Ting Xie1, Meng Guan1, Kai Cheng1
1Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics-Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, P. R. China.
Science advances
|March 26, 2025
概括
这项研究引入了一种新的纳米脂质体-细菌混合系统,用于癌症治疗. 这种创新方法增强了巨细胞激活和T细胞反应,改善了抗瘤免疫力和肠道健康.
科学领域:
- 生物医学工程 生物医学工程
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
背景情况:
- 瘤免疫检查点疗法 (ICT) 面临的挑战包括免疫检查点抑制剂 (ICI) 的低传递效率,有限的向和减少的响应能力.
- 开发新的策略来克服这些局限性对于推动ICT至关重要.
研究的目的:
- 开发一种纳米脂质体-细菌混合系统,以在低氧环境中增强瘤向和巨细胞激活.
- 为了使细菌在现场产生对CD47 (aCD47) 的抗体,阻止免疫逃生信号并增强抗瘤免疫力.
主要方法:
- 重编程减弱的 * Escherichia coli * MG1655 合成aCD47 作为对低氧的反应.
- 表面结合细菌与载有巨细胞殖民地刺激因子的氧化还原反应性脂质体.
- 利用细菌的热带性来增强巨细胞的透和两极化.
主要成果:
- 该系统展示了精确的瘤向,并在缺氧条件下在现场触发CD47表达,阻止"不要吃我"信号.
- 增强巨细胞的抗瘤活性,随后激活CD8+CD3+T细胞,从而增强全身抗瘤免疫力.
- 改善了肠道耐受性,增加了益生菌和减少了肠道微生物组的致病性.
结论:
- 纳米脂质体-细菌混合系统提供了一个有前途的战略,通过实现向抗体生产和免疫细胞激活来克服ICT的局限性.
- 这种方法有可能提高癌症治疗的疗效,同时对肠道健康产生积极影响.
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