ca-circSCN8A 通过LLPS启动的R-Loop促进HPASMCs铁
Mengnan Li1,2,3, Yingying Hao1,3, Xinyue Song1,3
1College of Pharmacy, Harbin Medical University, PR China. (M.L., Y.H., X.S., H.L., H.S., L.Z., H.Y., C.M., X. Zhao, D.Z.).
Hypertension (Dallas, Tex. : 1979)
|May 19, 2025
概括
染色体关联RNAcircSCN8A通过与SLC7A11促进物形成R循环,促进肺高血压中的铁亡,提供潜在的治疗标.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 铁亡与肺高血压 (PH) 有关.
- 染色体关联RNAs (ca-RNAs) 调节铁,但机制尚不清楚.
- 这项研究研究了ca-circSCN8A在与PH相关的铁亡中的作用.
研究的目的:
- 确定和描述ca-circSCN8A在肺动脉平滑肌细胞中缺氧诱导的铁亡中的功能.
- 阐明ca-circSCN8A调节PH中的铁亡的分子机制.
- 探索ca-circSCN8A作为PH的潜在治疗点.
主要方法:
- 生物信息学,桑格测序和RNase R消化确定了ca-circSCN8A上调.
- 功能增益和损失试验评估了ca-circSCN8A在体外和体内ferroptosis中的作用.
- RNA免疫沉,拉下测试和各种分子测试探索了与FUS的相互作用和作用机制.
主要成果:
- 在PH中,ca-circSCN8A被上调,并促进了缺氧诱导的铁亡.
- ca-circSCN8A招募了EP300来乳酸FUS,通过液态-液态相分离形成一个复合体.
- 这种复合物与SLC7A11促进体稳定了R循环,抑制了转录并破坏了氧化还原平衡.
结论:
- ca-circSCN8A通过液-液相分离,与非宿主基因促进体形成R环,从而驱动PH中的铁亡.
- 这项研究揭示了循环RNA介导的基因调节的新机制.
- ca-circSCN8A是一种关键的调节剂和潜在的治疗点,用于缺氧PH的铁化.
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