O-GlcNAc转移酶通过调节Wnt/β-catenin信号传递促进血管光滑肌肉化
Lin Xu1,2, Boao Liu1, Honghui Ma1
1Xinxiang Key Laboratory of Metabolism and Integrative Physiology, School of Forensic Medicine, Xinxiang Medical University, Xinxiang, Henan, China.
概括
慢性病中的血管化通过抑制光滑肌肉细胞中的O-GlcNAc转移酶 (OGT) 来减少. 这一途径涉及β-catenin的O-GlcNAcylation,影响其活性并促进化.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 腎臟病學 (nephrology) 是一種醫學專業.
背景情况:
- 血管化 (VC) 是慢性病 (CKD) 患者心血管疾病的标志.
- 血管光滑肌细胞 (VSMC) 的骨质变异驱动VC.
- 在矿物代谢诱导的VC中O-GlcNAcylation的作用尚未完全理解.
研究的目的:
- 研究O-GlcNAc信号传递在异常矿物代谢诱导的VC中的作用和机制.
- 确定在VC期间在VSMC中O-GlcNAc转移酶 (OGT) 的体内功能.
主要方法:
- 生成的OGT光滑肌肉细胞特异性淘汰小鼠.
- 通过5/6腎切除 (5/6Nx) 或高剂量维生素D3诱导的VC.
- 使用O-GlcNAcylation和Wnt/β-catenin信号传导的药理学调节器评估了VSMC骨质变异.
主要成果:
- 在VC模型和CKD患者中,OGT和全球O-GlcNAcylation被上调.
- 在VSMC中OGT删除减轻了VC.
- 升高的O-GlcNAcylation通过Wnt/β-catenin通路激活促进了VSMC骨质变异,包括β-catenin的O-GlcNAcylation.
结论:
- 滑动肌肉O-GlcNAc信号传递在高酸血症诱导的VC中至关重要.
- β-catenin的O-GlcNAcylation调节其活性,并促进VSMC的骨质转化.
- 针对OGT可能为CKD中VC提供治疗策略.
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