德克萨米他通过TGFβ/Smad3-NOX4轴增加ROS水平,诱导缩相关的肌网细胞的变化
Haijun Li1, Jing Ren1, Huiling Cui1
1Henan Provincial People's Hospital, Henan Eye Institute, Henan Eye Hospital, Zhengzhou University People's Hospital, Henan University People's Hospital, Zhengzhou, China.
Cell transplantation
|June 2, 2023
概括
葡萄糖皮质类药物治疗可以通过诱导眼睛的状眼网中的细胞衰老来引起青光眼. 这项研究显示,德克萨米他通过TGFβ/Smad3/NOX4通路触发衰老,增加眼内压力.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 玻璃眼瘤是葡萄糖皮质醇 (GC) 治疗的严重并发症,通常与眼内压力 (IOP) 升高有关.
- 像德甲 (DEX) 一样,GCs引发青光眼的确切机制,特别是通过细胞衰老,仍然不清楚.
- 德克斯会影响尾管网,但它在通过衰老促进青光眼的作用需要进一步的研究.
研究的目的:
- 调查德克萨米他 (DEX) 是否会诱导人类带网状细胞 (HTMCs) 中的细胞衰老.
- 阐明涉及DEX诱导衰老和升高内压的分子途径.
- 探索针对这一途径的潜在治疗干预措施.
主要方法:
- 在用DEX.治疗的HTMC上进行了RNA测序 (RNA-seq) 和生物信息分析.
- 用SA-β-gal染色,IL-6分泌,SAHF形成,p15表达和ROS水平来评估细胞衰老.
- 在体内研究中使用了小鼠模型来评估DEX对IOP和状网基因表达的影响.
主要成果:
- DEX治疗显著改变了HTMC中的基因表达,显著丰富了转化生长因子β (TGFβ) 信号和细胞衰老途径.
- DEX诱导了细胞衰老的明显迹象,包括增加的SA-β-gal阳性,IL-6,SAHF,p15和ROS水平.
- 抑制TGFβ/Smad3通路 (使用SIS3),NADPH氧化酶4 (NOX4) (使用GLX351322) 或ROS (使用NAC) 有效地阻止了DEX诱导的衰老. 在小鼠中,GLX351322减轻了DEX诱导的IOP升高.
结论:
- 德克萨米他通过TGFβ/Smad3/NOX4信号轴上调ROS,诱导人体脊髓网细胞中的细胞衰老.
- 这种DEX诱导的衰老有助于增加IOP和青光眼的发展.
- 准TGFβ/Smad3/NOX4通路为预防GC诱导的玻璃眼炎提供了一个潜在的治疗策略.
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