代谢性压力诱导的胆激酶α (CHKA) 在内皮亚群中的激活有助于糖尿病相关的微血管功能障碍
Ling Ren1,2, Linyu Zhang3, Yun Bai4
1Department of Ophthalmology, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, 200080, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|June 23, 2025
概括
这项研究表明,胆激酶α (CHKA) 驱动糖尿病中异常的血管生长. 针对CHKA可能为糖尿病微血管并发症提供新的治疗方法.
科学领域:
- 内分泌学和新陈代谢学
- 血管生物学 血管生物学
- 分子医学是分子医学.
背景情况:
- 糖尿病是微血管功能障碍的主要原因,导致视网膜病变和病变等严重并发症.
- 内皮功能障碍背后的确切机制及其在糖尿病中的异质性仍然不清楚.
- 内皮细胞 (ECs) 表现出功能多样性,影响糖尿病血管疾病中的病理过程.
研究的目的:
- 为了研究代谢压力诱导的胆激酶α (CHKA) 激活在内皮细胞亚群中的作用.
- 阐明CHKA对糖尿病诱导的微血管功能障碍和病态血管生成的贡献.
- 确定CHKA作为糖尿病血管并发症的潜在治疗点.
主要方法:
- 单细胞RNA测序 (scRNA-seq) 用于在视网膜血管中识别不同的内皮细胞子集群.
- 在内皮细胞 (ECs) 中进行CHKA沉默,以评估其对糖尿病模型中的血管活性和血管功能的影响.
- 对NAD+代谢,尼古丁胺胺单核酸 (NMN) 补充和信号通路 (NAD+-SIRT1-Notch) 的分析.
- 临床样本分析和门德尔随机化研究,以验证CHKA和糖尿病并发症之间的联系.
主要成果:
- 确定了三个不同的EC子集群,其中一个显示CHKA表达升高和增强的血管新生活性.
- 在糖尿病小鼠中,CHKA沉默抑制了血管生成,减少了视网膜血管功能障碍,并破坏了NAD+代谢.
- 补充NMN部分扭转了CHKA沉默的抗血管原效应.
- 发现CHKA通过NAD+-SIRT1-Notch信号通路来调节内皮功能障碍.
- 在临床和遗传研究中,增加CHKA表达与糖尿病微血管并发症有很强的相关性.
结论:
- 这项研究确定CHKA是糖尿病病理血管生成的关键调节者.
- 通过NAD+-SIRT1-Notch通路,CHKA激活有助于内皮功能障碍和微血管并发症.
- CHKA代表了减轻糖尿病血管并发症的有希望的治疗标.
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