在PGE2诱导的miR365/IL-6/STAT3信号传导中介于癌症中的树突细胞功能障碍
Vipul K Pandey1, Kavitha Premkumar1, Priya Kundu1
1Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India.
Life sciences
|May 26, 2024
概括
前列腺素E2 (PGE2) 通过IL-6/pSTAT3信号传递在树突细胞 (DCs) 中引起免疫抑制. 抑制EP4受体或STAT3可以恢复抗癌免疫力.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 分子生物学分子生物学
背景情况:
- 前列腺素E2 (PGE2) 是瘤微环境中免疫抑制的关键媒介.
- 树突细胞 (DCs) 在启动抗瘤免疫反应方面发挥着关键作用.
- 了解PGE2介导的DC功能障碍的机制对于开发有效的癌症免疫疗法至关重要.
研究的目的:
- 阐明PGE2抑制树突细胞 (DC) 功能的分子机制.
- 研究EP4受体和下游信号通路在PGE2诱导的免疫抑制中的作用.
- 探索针对PGE2通路的治疗策略,以恢复抗瘤免疫力.
主要方法:
- 使用4T1瘤携带小鼠的体内研究和用骨髓衍生DCs (BMDCs) 的体内实验.
- 对细胞因子产生 (ELISA/ELIspot) 和基因表达 (RT-PCR/流细胞计) 的分析.
- 对人类乳腺癌数据集的生物信息分析和微RNA (miR-365) 表达的操纵.
主要成果:
- PGE2通过EP4受体诱导IL-6的产生和pSTAT3信号在DC中,导致免疫抑制.
- EP4受体阻塞,STAT3抑制或miR-365模仿逆转PGE2诱导的免疫抑制.
- 向循环氧化酶-2 (COX-2) 或EP4受体减少了瘤负担,EP4抗效应取决于DCs.
- 在人类乳腺癌中观察到PGE2和IL-6之间的强烈相关性.
结论:
- 状细胞是癌症中PGE2诱导的免疫抑制的中心媒介.
- EP4或STAT3的抑制剂,或miR-365模仿剂,代表了增强抗瘤免疫力的有希望的治疗策略.
- 在DC中准PGE2通路可以有效地减少瘤的进展并恢复免疫功能.
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