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通过miR-568/PRG4路径抑制circRNA_0030042减轻心力衰竭
Li-Li Wang1, Hong-Mei Yao1, Xing-Xing Zhao1
1Department of Cardiovascular Medicine, The First Hospital of Shanxi Medical University, Taiyuan, P.R. China.
Journal of biochemical and molecular toxicology
|April 28, 2025
概括
这项研究揭示,循环RNA circRNA_0030042通过促进铁亡,加剧心力衰竭. 击倒circRNA_0030042可以通过miR-568/PRG4通路缓解心力衰竭的进展和心脏功能障碍.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 心脏病学 心脏病学
背景情况:
- 心力衰竭是全球主要的死亡原因,其特点是心脏结构和功能异常.
- 循环RNAs (circRNAs) 正在成为各种疾病的关键调节者,但它们在心力衰竭中的作用仍然在很大程度上未被探索.
- 由FOXO1基因衍生的circRNA_0030042是一种新发现的circRNA,在心力衰竭中具有未知的功能.
研究的目的:
- 调查circRNA_0030042在心力衰竭进展中的作用和潜在机制.
- 探索向circRNA_0030042作为心力衰竭治疗策略的潜力.
主要方法:
- 使用H2O2诱导的AC16细胞建立了体外心力衰竭模型,并在小鼠体内使用横向大动脉收缩 (TAC) 建立了体内模型.
- 在患者血液样本和细胞/动物模型中评估circRNA_0030042的表达水平.
- 利用了circRNA_0030042的淘汰技术,并分析了它对细胞活力,细胞亡,铁亡标志物 (ROS,MDA,GSH,铁含量) 和关键蛋白质 (SLC7A11,GPX4) 的影响.
- 使用分子生物学技术研究circRNA_0030042,miR-568和PRG4之间的相互作用.
- 在TAC小鼠中评估心脏功能,心肌损伤标志物 (cTnI,CK-MB,BNP) 和心脏组织病理学.
主要成果:
- 在心力衰竭患者和H2O2诱导的AC16细胞中,circRNA_0030042的表达显著上调.
- 在受H2O2治疗的AC16细胞中,击败circRNA_0030042抑制了亡,增强了活力,减少了ferroptosis,并增加了保护性蛋白质表达.
- circRNA_0030042通过海绵化miR-568来积极调节PRG4表达,形成circRNA_0030042/miR-568/PRG4通路.
- 在体内,circRNA_0030042 knockdown改善了心脏功能,减少了心肌损伤,缓解了组织病理损伤,并恢复了TAC小鼠的保护性蛋白质水平.
结论:
- circRNA_0030042通过通过miR-568/PRG4通路促进铁亡,在心力衰竭的进展中起着有害的作用.
- 向circRNA_0030042提供了一种潜在的治疗方法,可以减轻心力衰竭并改善心脏功能.
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