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下调的卡尔莫杜林表达有助于糖尿病患者内皮细胞损伤
Tian-Tian Liu1, Huan-Huan Xu1, Ze-Juan Liu1
1Department of Pharmacology, Beijing Key Laboratory of Cardiovascular Diseases Related to Metabolic Disturbance, Capital Medical University, Beijing, 100069, China.
Acta pharmacologica Sinica
|July 19, 2023
概括
下调的卡尔莫杜林 (CaM) 在糖尿病中损害了内皮氧化合成酶 (eNOS) 功能. 恢复CaM水平可以防止糖尿病内皮功能障碍,并促进血管修复.
科学领域:
- 心血管生物学 心血管生物学
- 内皮细胞生物学 内皮细胞生物学
- 糖尿病的发病因子
背景情况:
- 内皮功能障碍是糖尿病相关心血管疾病的关键因素.
- 缺陷的内皮氧化合成酶 (eNOS) 活性和氧化 (NO) 的生物可用性是这种功能障碍的核心.
- 驱动糖尿病eNOS功能障碍的精确机制尚未完全理解.
研究的目的:
- 研究calmodulin (CaM) 在糖尿病中观察到的内皮氧化合成酶 (eNOS) 功能障碍中的作用.
- 在糖尿病患者中阐明将CaM与内皮健康联系起来的分子机制.
主要方法:
- 使用人类静脉内皮细胞和暴露于高葡萄糖 (HG) 的小鼠内皮细胞 (EPC).
- 评估的CaM,血管内皮生长因子 (VEGF) 和eNOS酸化水平.
- 采用了CALM1基因淘汰和过度表达技术.
- 研究了糖尿病动物模型和人类患者样本,包括基因测序和基因传递干预.
主要成果:
- 高葡萄糖暴露导致CaM和VEGF表达减少,eNOS酸化受损,内皮细胞细胞迁移/管形成减少.
- CALM1的倒置模仿了这些效应,而CALM1的过度表达则拯救了它们.
- 糖尿病动物和患者表现出减少的CaM表达,eNOS酸化和血管功能受损.
- 在糖尿病小鼠模型中,局部CALM1基因传递改善了血液 perfusion,血管生成和伤口愈合.
结论:
- 下调的卡尔莫杜林 (CaM) 表达是糖尿病中内皮功能障碍和血管生成障碍的关键因素.
- 降低的CaM破坏了eNOS酸化和NO的生物可用性,导致糖尿病血管并发症.
- CaM代表了减轻糖尿病内皮损伤及其相关心血管风险的新型治疗标.
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