在ADAR1-HNRNPL中介的CircCANX下降促进了慢性阻塞性肺病的自
Ting-Ting Chen1,2, Yuan-Yuan Wei1,2, Jia-Ying Kang1,2
1Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, 230022, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|March 17, 2025
概括
这项研究确定了circCANX,一种循环RNA,在慢性阻塞性肺病 (COPD) 中减少. 较低的circCANX水平通过增加炎症使COPD恶化,这表明circCANX是潜在的治疗点.
科学领域:
- 分子生物学分子生物学
- 肺部病理学 肺部病理学
- 生物化学 生物化学
背景情况:
- 慢性阻塞性肺病 (COPD) 是一种进展性炎症性呼吸道疾病,治疗选择有限.
- 循环RNAs (circRNAs) 正在成为包括COPD在内的疾病的关键调节者,提供潜在的治疗点.
- 识别COPD的新型分子机制对于开发有效干预措施至关重要.
研究的目的:
- 识别和描述参与COPD病变的新型循环RNA.
- 调查circCANX在COPD进展和炎症中的作用.
- 探索circCANX作为COPD生物标志物和治疗点的潜力.
主要方法:
- 在COPD患者样本和细胞/动物模型中识别和量化circRNAs.
- 研究控制cirCANX表达的调控机制,包括mRNA前剪接因子.
- 使用体外和体内模型的功能性研究来评估circCANX对COPD相关炎症,自和压力颗粒形成的影响.
- 机制研究以阐明 circCANX 如何通过无意中介 mRNA 衰变 (NMD) 途径调节基因表达.
主要成果:
- 一个核circRNA,circCANX,被确定并发现在COPD显著下降.
- cirCANX的下降归因于CANX前mRNA的增强线性剪接,由ADAR1-HNRNPL相互作用介导.
- 在COPD患者中,更高的circCANX表达与更好的肺功能相关 (FEV1/FVC).
- 证明CircCANX可以抑制自和压力颗粒的形成,从而减轻COPD的炎症.
- 在机械上,cirCANX与P53mRNA和UPF1形成复合体,通过NMD促进P53mRNA降解.
结论:
- CircCANX通过调节自和压力颗粒形成来抑制炎症,在COPD中起着保护作用.
- 环CANX-P53 mRNA-UPF1-NMD轴代表了COPD病变发生的新型调节途径.
- 作为一种潜在的诊断生物标志物和COPD药物开发的治疗点,CircCANX具有前景.
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