干预性水凝微球疫苗作为一种免疫放大剂,用于在废除疗法后激活抗瘤免疫力
Xiaoyu Liu1, Yaping Zhuang2, Wei Huang1
1Department of Radiology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No.197, Ruijin 2nd Road, 200025, Shanghai, P. R. China.
Nature communications
|July 11, 2023
概括
一种新的水凝微球疫苗在胰腺癌切除后增强了抗癌免疫力. 这种方法有效地改变了瘤微环境,改善了临床前模型中的生存率和减少了转移.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物材料科学 生物材料科学
背景情况:
- 胰腺癌对化学疗法和免疫疗法等常规疗法的反应率较低.
- 虽然不可逆转的电穿孔 (IRE) 切除对不可切除的胰腺癌有希望,但由于免疫抑制性瘤微环境,瘤复发很常见.
- 增强内源性适应性抗癌免疫力对于改善除和随后的免疫疗法的结果至关重要.
研究的目的:
- 开发一种基于疫苗的策略,在胰腺瘤切除后放大抗癌免疫反应.
- 研究一种新型水凝微球疫苗克服免疫抑制瘤微环境的潜力.
- 在临床前的胰腺癌模型中,评估疫苗与废弃疗法结合的疗效.
主要方法:
- 开发一种装有FLT3L和CD40L的水凝微球疫苗.
- 在 орто托普胰腺癌小鼠模型中,给瘤床进行除后的疫苗.
- 评估免疫细胞迁移 (特别是1型常规树突细胞-cDC1) 到瘤排水淋巴结 (TdLN).
- 评估抗原交叉呈现,CD8+T细胞反应,瘤微环境调节,存活率和远程转移抑制.
主要成果:
- 水凝微球疫苗有效地释放了瘤床中的载荷 (FLT3L和CD40L).
- 接种疫苗促进了瘤寄存cDC1s向TdLNs的迁移,从而启动了cDC1介导的抗原交叉呈现级联.
- 观察到内源性CD8+T细胞反应显著增强.
- 该疫苗成功地将免疫学上"冷"的瘤微环境转化为"热"的微环境.
- 组合疗法导致显著增加生存率,并抑制了小鼠远程转移的生长.
结论:
- 水凝微球疫苗是一种安全有效的策略,可以加强胰腺癌的抗癌免疫力.
- 这种方法在通过克服免疫抑制瘤微环境来改善治疗结果方面具有显著的前景.
- 对这种组合疗法的进一步研究可能会为胰腺癌患者改善临床策略.
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