miR-205-5p通过向FOXO1来抑制同类氨酸诱导的肺微血管内皮功能障碍
Xiaobo Huang1, Zhen Li2,3, Ling Zhang4
1Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Ningxia Medical University (The First People's Hospital of Yinchuan), Yinchuan 750001, China.
Acta biochimica et biophysica Sinica
|July 26, 2023
概括
同类氨酸 (Hcy) 提高了肺内皮功能障碍. 这项研究揭示了miR-205-5p通过向FOXO1来保护Hcy损伤,为Hcy诱导的肺损伤提供了潜在的治疗策略.
科学领域:
- 心血管生物学 心血管生物学
- 分子生物学分子生物学
- 肺部医学 肺部医学
背景情况:
- 同型氨酸 (Hcy) 是慢性疾病的危险因素,血管内皮细胞损伤是早期事件.
- 微RNAs (miRNAs) 涉及Hcy诱导的内皮功能障碍,但它们在肺内皮中的特定作用尚不清楚.
研究的目的:
- 调查miRNAs在同类氨酸诱导的肺内皮功能障碍中的作用和机制.
- 确定特定的miRNA及其参与保护Hcy诱导的肺损伤的点.
主要方法:
- 利用CBS+/‒小鼠来建模Hcy诱导的肺内皮功能障碍.
- 研究了miR-205-5p表达的调节机制,包括DNA甲基化和DNMT1结合.
- 在Hcy暴露的背景下评估了miR-205-5p和FOXO1之间的相互作用.
主要成果:
- 发现miR-205-5p可以缓解暴露于Hcy的小鼠的肺内皮功能障碍.
- 暴露于homocysteine导致miR-205-5p促进体通过增加DNMT1结合的DNA高甲基化,从而减少miR-205-5p的表达.
- 降低miR-205-5p的调节导致其与标FOXO1的结合减少,从而导致内皮功能障碍.
结论:
- miR-205-5p通过准FOXO1.1,起到对同类半素诱导的肺内皮功能障碍的保护作用.
- 促进剂miR-205-5p的高甲基化是推动其在Hcy诱导的肺损伤下调节的关键机制.
- miR-205-5p是缓解Hcy诱导的肺损伤的潜在治疗标.
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