向CREB重塑免疫微环境,以增强胰腺癌的免疫治疗反应
bioRxiv : the preprint server for biology
|December 15, 2025
概括
准CREB (循环腺单酸反应元结合蛋白1) 信号,通过重编程瘤相关的巨细胞来抑制胰腺癌的生长. 这种方法提高了免疫治疗的有效性,为胰腺管道腺癌 (PDAC) 治疗提供了新的希望.
科学领域:
- 在瘤学瘤学.
- 癌症免疫学 癌症免疫学
- 分子生物学分子生物学
背景情况:
- 胰腺管腺癌 (PDAC) 提出了重大的治疗挑战.
- 循环腺单反应元结合蛋白1 (CREB) 涉及PDAC病变发生,特别是通过其与瘤性Kras和慢性炎症的相互作用.
- 瘤相关巨细胞 (TAMs) 在瘤微环境和PDAC中的免疫抑制中发挥着至关重要的作用.
研究的目的:
- 研究CREB在PDAC生长和免疫抑制中的作用.
- 阐明CREB影响TAM极化和T细胞透的分子机制.
- 评估针对PDAC中的CREB-LIF信号轴的治疗潜力.
主要方法:
- 使用基因工程小鼠模型 (KPC) 进行PDAC.
- 在KPC小鼠 (KPCC-/-) 中采用了CREB的选择性删除,以评估其对疾病进展的影响.
- 进行了无偏见的转录基因分析,分子,遗传和药理学方法在体外和体内.
- 研究了白血病抑制因子 (LIF) 在调解CREB对TAMs的影响中的作用.
- 用一种CREB特异性抑制剂 (CREBi) 向CREB-LIF轴.
主要成果:
- 在KPC小鼠中,CREB激活促进PDAC生长和TAM介导的免疫抑制.
- 在KPCC-/-小鼠中选择性删除CREB减弱了原发性瘤负担.
- 通过CREB介导的LIF的转录调节被确定为瘤细胞-巨细胞交叉的关键媒介,促进瘤前TAM两极分化.
- 来自癌细胞的LIF促进了免疫抑制的,亲瘤的微环境,减少了T细胞透.
- 对CREB-LIF轴的药理抑制显著抑制了瘤生长,并使PDAC对免疫治疗敏感.
结论:
- CREB信号传递是PDAC生长和通过LIF介导的巨细胞重编程的免疫抑制的关键驱动因素.
- 针对CREB-LIF轴是PDAC的一种有前途的治疗策略.
- 涉及CREB抑制和免疫疗法的组合疗法具有显著的潜力,可以改善PDAC患者的治疗结果.
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