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在糖尿病中,LDHA通过代谢和表观遗传重编程诱导β细胞脱差

Xirui Li^1,2, Haoqiang Gong², Can Xiong²

¹Department of Cardiovascular Surgery, The Second Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.

|December 11, 2025

概括

乳酸脱酶A (LDHA) 抑制可保持胰腺β细胞的身份和功能,为糖尿病提供潜在的新疗法. 这项研究揭示了LDHA.

科学领域:

糖尿病中的代谢和表观遗传调节
胰腺β细胞生物学
糖尿病的分子机制

背景情况:

胰腺β细胞脱差是糖尿病的关键因素,减少β细胞质量和功能.
了解β细胞脱差的分子机制对于开发有效的糖尿病治疗至关重要.
需要干预目标来预防或逆转β细胞脱差.

研究的目的:

研究乳酸脱酶A (LDHA) 在胰腺β细胞脱差中的作用.
探索LDHA抑制作为糖尿病潜在的治疗策略.
阐明连接LDHA,表观遗传修饰和β细胞功能障碍的分子机制.

主要方法:

在人类糖尿病小岛和小鼠模型 (db/db和HFD诱导) 中分析LDHA表达和活性.
评估LDHA抑制对糖尿病小鼠β细胞功能和身份的影响.
染色体免疫沉测序 (ChIP-seq) 和RNA测序 (RNA-seq) 研究LDHA对基因母乳和基因表达的影响.

主要成果:

在糖尿病模型中,LDHA抑制保留了β细胞的身份,延迟了快食葡萄糖受损的疾病进展,并改善了糖尿病模型中的葡萄糖平衡.
在关键的β细胞分离标记基因 (Sox9,Hes1,Aldh1a3) 中,LDHA激活增加了组分离体H3氨酸9乳酸化 (H3K9la).
增加的H3K9la促进了脱差标记的转录,导致β细胞功能受损和葡萄糖平衡.

结论:

在代谢和表观遗传重编程中,LDHA起着至关重要的作用,在糖尿病中驱动β细胞脱差.
通过LDHA介导的基因素乳化是将代谢变化与β细胞功能障碍联系起来的关键机制.
抑制LDHA是一种有前途的新型治疗策略,用于管理和治疗糖尿病.

关键词:

贝塔细胞脱差分化的过程糖尿病糖尿病糖尿病表观遗传重编程是一种表观遗传重编程.希斯的乳酸化希斯的乳酸化拉达 (LDHA) 是一个

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