通过调节 miR-93-5p/VEGFA 的作用加剧了糖尿病视网膜病的视网膜内皮细胞功能障碍

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Updated: Jun 21, 2026

05:51

Characterization of a Novel Human Organotypic Retinal Culture Technique

Published on: June 9, 2021

Tian-Ran Chen^1,2,3,4, Jia-Xing Zhou^1,2,4, Ya-Ru Hou^1,2,3,4

¹Department of Ophthalmology, Qilu Hospital of Shandong University, Shandong University, Jinan, Shandong Province, China.

Investigative ophthalmology & visual science

|March 3, 2026

概括

高葡萄糖降解hNRNPA2B1,使糖尿病视网膜病变恶化. 恢复hnRNPA2B1或miR-93-5p水平可能会在糖尿病中保护视网膜血管.

科学领域:

眼科医生眼科眼科
分子生物学分子生物学
内分泌学在内分泌学.

背景情况:

糖尿病视网膜病变 (DR) 涉及针对视网膜内皮细胞 (RECs) 的微血管并发症.
已知肝炎核核核糖核蛋白A2B1 (hnRNPA2B1) 抑制了DR的病态新血管化.
在高葡萄糖诱导的REC功能障碍中,hnRNPA2B1的特定作用尚未完全理解.

研究的目的:

为了研究hnnRNPA2B1在高血糖引起的视网膜内皮细胞 (REC) 功能障碍中的作用.
在糖尿病疾病的背景下阐明 hnRNPA2B1 调节的分子机制.
探索潜在的治疗目标,以保护糖尿病患者视网膜血管完整性.

主要方法:

使用初级小鼠视网膜血管内皮细胞 (mRVEC) 和链毒素诱导的糖尿病小鼠.
进行了定量实时PCR,西部涂抹,RNA免疫沉和免疫光染色.
功能性检测,共免疫沉和组织学分析评估了REC功能和视网膜完整性.

主要成果:

高葡萄糖诱导的缩,导致hnRNPA2B1降解和加剧REC功能障碍.
hnRNPA2B1通过招募DGCR8,抑制VEGFA表达,促进了miR-93-5p的成熟.
在糖尿病小鼠中,静脉内输送AAV2-hnRNPA2B1或miR-93-5p改善了视网膜血管标志物.

结论:

高葡萄糖诱导的缩通路有助于 hnRNPA2B1 降解,恶化 REC 功能障碍.
hnRNPA2B1在miR-93-5p成熟和VEGFA调节中起着至关重要的作用.
针对 hnRNPA2B1 或 miR-93-5p 是糖尿病视网膜血管恒温的潜在治疗策略.

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