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通过O-GlcNAcylation介导的内皮代谢记忆通过小细胞外囊泡促进心脏损伤

Mingge Ding¹, Rui Shi², Yanyan Du³

¹Department of Geriatrics Cardiology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, Shaanxi, China; Key Laboratory of Surgical Critical Care and Life Support, Xi'an Jiaotong University, Ministry of Education, Xi'an 710004, Shaanxi, China.

Cell metabolism

|April 3, 2025

概括

由于代谢记忆,糖尿病心力衰竭的风险仍然存在. 糖尿病衍生的小细胞外囊泡 (sEV) miR-15-16从内皮细胞引起持久的心脏功能障碍,即使在血糖控制后.

科学领域:

心血管生物学心血管生物学
代谢疾病代谢疾病
分子医学是分子医学.

背景情况:

糖尿病患者面临心力衰竭的风险增加,即使血糖得到控制.
代谢记忆表明高血糖症在正常化后的长期负面影响.

研究的目的:

研究糖尿病衍生的小细胞外囊泡 (sEVs) 和microRNA-15-16 (miR-15-16) 在心脏功能障碍中的作用.
阐明导致心脏损伤的内皮细胞代谢记忆的潜在机制.

主要方法:

在糖尿病模型和患者中分析了血SEV和miR-15-16.
在内皮细胞中研究CaMK2a/O-GlcNAcylation通路.
在暴露于糖尿病衍生的sEVs的健康动物中评估心脏功能.

主要成果:

携带miR-15-16的糖尿病衍生血SEV在健康动物中诱导心脏功能障碍,显示出记忆效应.
内皮细胞被确定为sEV miR-15-16的主要来源.
在内皮细胞中通过CaMK2a/O-GlcNAcylation反循环持续激活CaMK2a驱动持续的sEV miR-15-16释放.
在糖尿病患者中,高血sEV miR-15-16水平与心脏功能障碍相关,独立于血糖控制.

结论:

由O-GlcNAcylation和CaMK2a激活介导的内皮代谢记忆驱动持续的sEV miR-15-16释放.
这种持续释放的sEV miR-15-16有助于糖尿病患者的长期心脏损伤.
sEV miR-15-16 作为糖尿病心脏功能障碍的潜在生物标志物.

关键词:

这就是CaMK2a.在FoxO1中,FoxO1是指FoxO1的类型.这是一种O-GlcNAcylation.统计统计统计心脏功能障碍的心脏功能障碍在这种情况下,胰岛素胰岛素胰岛素.代谢记忆的代谢记忆这就是miRNAs.小小的细胞外囊泡.

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