结合免疫疗法与激进的CD40激活树突细胞表达IL12和克服PD-1抵抗
Irina Krykbaeva1, Kate Bridges2, William Damsky1,3
1Department of Pathology, Yale School of Medicine, New Haven, Connecticut.
Cancer immunology research
|July 21, 2023
概括
结合骨髓细胞激活和检查点阻塞,可以克服癌症抵抗力. 这种新的策略,涉及CD40激活和CSF1R阻塞与抗PD-1一起,在耐药模型中触发强大的抗瘤免疫力和完整的瘤回归.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 癌症研究 癌症研究
背景情况:
- 检查点抑制剂 (例如,抗PD-1) 已经改变了癌症治疗,但面临着显著的抗药性.
- 瘤微环境中的髓状细胞对检查点抑制剂的反应具有关键影响.
- 了解髓状细胞的作用是克服治疗耐药性的关键.
研究的目的:
- 研究一种向髓质细胞的组合疗法,以克服黑色素瘤中抗PD-1抵抗.
- 确定这种三重疗法的有效性背后的免疫机制.
- 评估基于IL12的疗法在克服PD-1耐药性的潜力.
主要方法:
- 利用一种抗PD-1耐药的小鼠黑色素瘤模型.
- 进行的组合疗法:抗PD-1,CD40激动剂和CSF1R阻断.
- 进行了树突细胞 (DC) 的单细胞细胞因子分泌概况和单细胞RNA测序.
- 评估T细胞反应和瘤回归.
- 测试了一种新的IL12 mRNA治疗方法.
主要成果:
- 在大多数小鼠中,三重疗法 (抗PD-1,CD40激活,CSF1R阻断) 诱导了瘤的完全回归.
- 早期的治疗效应是CD40激动剂驱动的,在人类和小鼠中具有可比的全身细胞因子概况.
- 一个分泌CCL22,CCL5和IL12的特定树突细胞子集被确定为关键.
- CD4+和CD8+T细胞对于治疗疗效至关重要,IL12是T细胞激活的原始.
- 单独的IL12 mRNA疗法克服了PD-1抵抗,并导致瘤回归.
结论:
- 结合基于骨髓细胞的先天性免疫激活与适应性免疫增强是对抗抗PD-1-耐药癌症的有希望的策略.
- 准髓状细胞,特别是通过CD40激动性和IL12的向,可以使瘤重新敏感到检查点抑制.
- IL12 mRNA疗法代表了一种潜在的独立方法来克服PD-1耐药性.
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