骨髓细胞的TREM1激活促进了抗瘤免疫力
Vladislava Juric1, Erin Mayes1, Mikhail Binnewies1
1Pionyr Immunotherapeutics, 2 Tower Place, Suite 800, South San Francisco, CA 94080, USA.
Science translational medicine
|August 30, 2023
概括
阻断PY159在髓状细胞-1 (TREM1) 上表达的触发受体可以增强抗瘤免疫力. 这种新的免疫疗法策略通过激活髓状细胞来促进促炎性瘤微环境 (TME),为癌症治疗提供了一种有前途的方法.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 分子生物学分子生物学
背景情况:
- 瘤微环境 (TME) 中的髓状细胞极大地影响抗瘤免疫力,存在于免疫抑制或免疫刺激状态.
- 在髓状细胞-1表达的触发受体 (TREM1) 是一种在各种髓状细胞表达的促炎受体,包括在TME中发现的受体.
- 在TME中调节髓状细胞功能是增强抗癌免疫反应的关键治疗策略.
研究的目的:
- 调查针对TREM1作为促进免疫刺激TME的治疗策略的潜力.
- 开发和表征PY159,一个afucosylated人性化抗TREM1单克隆抗体,作为TREM1激动剂.
主要方法:
- 开发PY159,一种具有增强的FcγR结合的afucosylated人性化抗TREM1单克隆抗体.
- 在体外评估PY159的激素活性,包括其对单细胞/巨细胞共刺激分子和细胞因子生产的影响.
- 在体外对PY159对T细胞激活的影响的评估.
- 在生体内使用反小鼠TREM1抗体 (PY159m) 在同基因小鼠瘤模型中的疗效研究.
主要成果:
- PY159作为TREM1激动剂起作用,诱导信号通路,这些信号通路可在单细胞和巨细胞上调节共刺激分子.
- PY159促进了促炎性细胞因子和化学因子的产生,促进了更具免疫刺激的环境.
- 在体外研究表明,在PY159.9的存在下,T细胞激活的强化.
- 在临床前的小鼠瘤模型中,PY159m表现出显著的抗瘤疗效.
结论:
- 在瘤髓状细胞上,TREM1的PY159介导的激动作用有效地促进了一种主导炎症的TME.
- 用PY159准TREM1代表了一种有希望的新型免疫疗法策略,用于增强抗瘤免疫力.
- 这种方法有可能在癌症治疗中得到更广泛的应用.
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