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工程CRISPR基于系统的细菌外膜囊泡增强T细胞免疫力,增强癌症免疫疗法
Hongjin Wang1, Hengji Zhan1, Bolin Pan1
1Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Department of Urology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, Guangdong, 510120, China.
Advanced materials (Deerfield Beach, Fla.)
|June 11, 2025
概括
工程化细菌外膜囊泡 (OMVs) 提供基因来增强T细胞对抗癌症的反应. 这种新型免疫治疗方法改善了瘤抑制,并与现有治疗方法协同作用,克服了对免疫检查点阻塞的抵抗力.
科学领域:
- 生物技术和纳米医学
- 癌症免疫疗法癌症免疫疗法
- 分子生物学分子生物学
背景情况:
- 免疫检查点阻塞 (ICB) 疗法在癌症治疗中表现有前途,但由于T细胞透和活性较差,其疗效有限.
- 细菌外膜囊泡 (OMVs) 在免疫治疗中受到研究,因为它们具有免疫激活特性,并有可能用于治疗.
- 在有效地准和加载治疗分子到OMV中,以改善癌症治疗存在挑战.
研究的目的:
- 设计细菌外膜囊泡 (OMVs) 以实现癌症免疫治疗中高效的基因包装和传递.
- 评估编码CXCL9和IL12 (OMV-C9I12) 的工程OMV在增强抗瘤免疫力的治疗潜力.
- 在临床前癌症模型中研究OMV-C9I12与抗PD-1/PD-L1疗法的协同效应.
主要方法:
- 工程化大肠杆菌BL21衍生的OMV用于增强DNA丰富和基因沉默能力.
- 通过包装CXCL9和IL12的基因来构建OMV-C9I12,以促进T细胞的招募和激活.
- 在小鼠MB49和B16F10瘤模型中评估瘤抑制,生存率和免疫反应,包括单细胞RNA测序 (scRNA-seq) 和人性化小鼠模型.
主要成果:
- 工程OMV在体外显示了7倍的DNA丰富效率和有效的基因沉默.
- OMV-C9I12治疗重新编程瘤细胞分泌CXCL9和IL12,显著增强T细胞化学反应和激活.
- 在临床前模型中,OMV-C9I12显著抑制了瘤生长,延长了生存期,并与抗PD-1/PD-L1疗法进行了协同作用,包括人性化小鼠的膀和乳腺癌.
结论:
- 工程OMV为癌症基因治疗提供了一个强大的平台,克服了当前免疫疗法的局限性.
- OMV-C9I12系统有效地增强T细胞介导的抗瘤免疫力,克服对免疫检查点阻塞的抵抗力.
- 这种工程OMV平台为开发新型癌症治疗和改善治疗结果提供了一个有前途的战略.
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