在TRPV4中介调节miR-146a表达的基础机制
bioRxiv : the preprint server for biology
|April 15, 2024
概括
暂时受体潜在化物4 (TRPV4) 在巨细胞中负面调节微RNA-146a (miR-146a). 这种TRPV4-miR-146a相互作用会影响诸如动脉样硬化等炎症性疾病.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 持续的炎症是诸如动脉样硬化等炎症性疾病的关键因素.
- 微RNA,包括miR-146a,调节基因表达,并具有抗炎性质.
- TRPV4是一种机械敏感的离子通道,与炎症反应有关.
研究的目的:
- 在炎症和动脉样硬化背景下研究TRPV4和miR-146a之间的相互作用.
- 通过TRPV4.4阐明miR-146a表达的调节机制.
主要方法:
- 评估TRPV4在各种刺激下 (脂多糖,矩阵刚性) 在巨细胞中对miR-146a表达的影响.
- 从动脉样硬化模型分析TRPV4在大动脉组织巨细胞中的作用.
- 研究涉及的信号通路 (NFκB,Stat1,P38,AKT) 和表观遗传机制 (基因组脱乙烯化,DNA甲基化).
- 确定 miR-146a 规则的基本 TRPV4 N-终端残留物.
主要成果:
- 在巨细胞中,TRPV4负面调节miR-146a的表达,特别是在脂多糖刺激或改变矩阵度时.
- 在动脉样硬化中,TRPV4减少了大动脉巨细胞中miR-146a的表达.
- TRPV4对miR-146a的调节独立于NFκB,Stat1,P38和AKT通路.
- 该机制涉及在miR-146a促进体的基因组脱甲基化,而不是DNA甲基化.
- 在LPS刺激的巨细胞中,TRPV4 N-终端残留物1-130对于抑制miR-146a至关重要.
结论:
- 在巨细胞中,TRPV4作为miR-146a表达的负调节剂.
- 这个调节轴在动脉样硬化病变发生过程中很重要.
- 这些发现揭示了一个新的TRPV4介导的表观遗传机制控制miR-146a.
- 这项研究为炎症性疾病提供了潜在的治疗点.
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