脂质封装的mRNA编码复杂的融合蛋白 潜在的抗瘤免疫反应
Casey W Shuptrine1, Yuhui Chen1, Jayalakshmi Miriyala1
1Shattuck Labs Inc., Austin, Texas.
Cancer research
|February 21, 2024
概括
脂质纳米颗粒封装的mRNA使得体内能够产生功能性复杂的融合蛋白. 这种方法增强了治疗性蛋白质暴露和抗瘤反应,优于传统的蛋白质疗法.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
背景情况:
- 脂质纳米颗粒 (LNP) 封装的mRNA技术在体内蛋白质生产中取得了进步,用于疫苗和治疗药物.
- 提供复杂的,多种类型的,具有更高阶结构的生物质对于扩展mRNA/LNP应用至关重要.
- 之前的研究集中在更简单的分泌蛋白质上,如IgG.
研究的目的:
- 评估使用mRNA/LNP配方在体内生产复杂的小分子融合蛋白 (SIRPα-Fc-CD40L和TIGIT-Fc-LIGHT) 的可行性.
- 评估这些mRNA/LNP配方是否实现功能性寡合化,延长暴露,以及与重组蛋白相比较的强有力的抗瘤活性.
主要方法:
- 静脉注射的mRNA/LNP配方编码为SIRPα-Fc-CD40L和TIGIT-Fc-LIGHT. 这两种类型.
- 在体内测量蛋白质的生产,寡合化,药理动力学和生物分布.
- 评估了免疫细胞透 (CD8+ T细胞),细胞因子水平 (IL2),瘤生长,存活率和与抗PD-L1.1联合治疗的疗效.
主要成果:
- 在体内实现了功能性六体融合蛋白的快速和持续的生产.
- 与重组蛋白相比,明显增加了蛋白质暴露 (28-140倍) 和瘤度 (高达134倍).
- 观察到瘤中增强的CD8+ T细胞透,增加IL2水平,延迟瘤生长,延长存活时间.
- 在与抗PD-L1疗法结合使用时,表现出更好的疗效.
结论:
- mRNA/LNP配方可以成功地为体内生产提供复杂的寡合生物制剂.
- 这种方法导致了优越的治疗性蛋白质暴露,目标活性和抗瘤免疫反应.
- 复杂生物制剂的mRNA/LNP输送具有在瘤学中改善患者结果的潜力.
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