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通过Dnmt3a介导的FoxO3高甲基化促进了骨质细胞生成期间的氧化还原失衡

Wei Zhang¹, Wenming Li¹, Jun Du¹

¹Department of Orthopaedics, The First Affiliated Hospital of Soochow University, Suzhou 215006, Jiangsu, China.

Proceedings of the National Academy of Sciences of the United States of America

|March 19, 2025

概括

减少叉头盒蛋白O3 (FoxO3) 水平,通过增加氧化应激和骨质细胞活性,恶化骨质疏松症. 向DNA甲基转移酶3a (Dnmt3a) 可以恢复FoxO3,为骨质疏松症提供潜在的表观遗传疗法.

科学领域:

分子生物学分子生物学
细胞生物学细胞生物学
生物化学生物化学

背景情况:

氧化还原失衡与异常的骨质细胞形成和骨质疏松症的骨损失有关.
叉头盒蛋白O3 (FoxO3),一种与氧化应激相关的转录因子,在骨质疏松症中发现的水平较低.

研究的目的:

调查FoxO3在骨质细胞形成和骨质疏松症中的作用和机制.
为了确定骨质疏松症治疗的潜在表观遗传点.

主要方法:

人类股骨头样本的单细胞RNA测序 (scRNA-seq).
对Lysm-Cre;FoxO3^f/f OVX小鼠进行分析,以评估活性氧物种 (ROS),骨质细胞生成和骨质损失.
调查FoxO3促进物甲基化和DNA甲基转移酶3a (Dnmt3a) 的作用.

主要成果:

FoxO3在巨细胞中表达,其缺乏会加剧小鼠的骨质损失和骨质细胞形成.
通过Dnmt3a调节的FoxO3促进物甲基化,降低了FoxO3的表达.
Dnmt3a knockdown增加了FoxO3,抑制了骨质细胞形成,并减少了ROS,从而减轻了骨质疏松症.

结论:

富士O3在调节骨质细胞形成和骨代谢方面发挥着至关重要的作用.
通过Dnmt3a介导的FoxO3促进物的甲基化是导致骨质疏松症的关键机制.
向Dnmt3a恢复FoxO3表达是一种有希望的骨质疏松症表观遗传治疗策略.

关键词:

通过DNA甲基化.在 Dnmt3a 中使用.在FoxO3中,FoxO3是什么?骨质细胞生成 (osteoclastogenesis) 是一个过程.氧化还原失衡氧化还原失衡

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