带有DR5主导性scFvs的工程外细胞囊同时向瘤和免疫抑制性树皮细胞
Yeye Guo1,2, Huaishan Wang1, Shujing Liu1
1Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
Science advances
|January 15, 2025
概括
由自然杀手细胞衍生的小型细胞外囊泡 (sEVs),表达死亡受体5 (DR5) 激动性抗体,在DR5阳性瘤和免疫抑制细胞中诱导亡,具有显著的抗癌效果,具有低毒性.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
背景情况:
- 小细胞外囊泡 (sEVs) 是具有治疗潜力的纳米级囊泡.
- 死亡受体5 (DR5) 是外部亡的关键媒介,使其成为癌症治疗的目标.
- 瘤微环境 (TME) 往往含有免疫抑制细胞,如髓质衍生抑制细胞 (MDSC) 和与癌症相关的纤维细胞 (CAF),这些细胞阻碍了抗瘤免疫力.
研究的目的:
- 为向癌症治疗设计DR5激动性单链可变片段 (scFv),表达sEVs.
- 在各种癌症模型中评估这些工程SEVs在诱导亡和抑制瘤生长方面的有效性.
- 评估DR5-scFv sEVs的体内生物分布,治疗效果和毒性.
主要方法:
- 设计了天然杀手细胞衍生的sEVs,以使用PDGFR跨膜域在它们的表面表达DR5-scFvs.
- 在实验室中测试了DR5-scFv sEVs在DR5-阳性癌细胞,MDSC和CAF中诱导亡的能力.
- 在体内使用黑色素瘤,肝脏和乳腺癌模型评估DR5-scFv sEVs的瘤向能力和抗瘤疗效.
- 将DR5-scFv sEV与传统的DR5抗体的疗效进行比较.
- 评估了DR5-scFv sEVs在器官型患者衍生的黑色素瘤切片培养中的影响.
主要成果:
- 在各种DR5阳性癌细胞,MDSC和CAF中,DR5-scFv sEVs迅速诱导了亡.
- 工程 sEV 在体外和体内都显示了对 DR5 阳性瘤的特定迁移.
- 在黑色素瘤,肝癌和乳腺癌模型中,DR5-scFv sEVs的系统输送显著抑制了瘤生长,在最小的毒性下延长了小鼠的生存时间.
- 与DR5抗体相比,DR5-scFv sEVs在体内表现出更高的疗效.
- 在患者衍生的黑色素瘤模型中,DR5-scFv sEVs有效地抑制了黑色素瘤细胞和MDSC,同时激活了CD8+ T细胞.
结论:
- 工程DR5-scFv sEVs是一个有希望的向癌症治疗方法.
- 这些sEV有效地向和消除瘤微环境中的癌细胞和免疫抑制细胞.
- DR5-scFv sEVs提供了一种强效和安全的治疗策略,具有临床转化潜力.
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