DHHC5通过维持VEGFR2局部化在脂质中来调节乳汁功能和肠道脂质吸收
Yin-Yue Zhao1, Yi-Fan Li1,2, Jian-Wei Hao2
1State Key Laboratory of Genetic Engineering, Shanghai Key Laboratory of Metabolic Remodeling and Health, Institute of Metabolism and Integrative Biology, Zhongshan Hospital, Fudan University, Shanghai 200438, China.
Life metabolism
|July 1, 2025
概括
研究人员发现DHHC5调节肠道淋巴功能和脂质吸收. 在小鼠中淘汰DHHC5损害了脂质吸收,揭示了饮食脂肪代谢的新途径.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 生理学 生理学 生理学
背景情况:
- 肠道淋巴系统对于吸收食脂肪至关重要,但其调节尚未完全理解.
- 了解这些机制是解决与脂质吸收相关的代谢障碍的关键.
研究的目的:
- 为了确定肠道淋巴管完整性和功能的关键调节者.
- 阐明了脂质吸收和运输背后的分子机制.
主要方法:
- 生成全身可诱导的Dhhc5淘汰赛 (Dhhc5-IKO) 鼠和淋巴内皮细胞 (LEC) 特定的淘汰赛鼠.
- 在淘汰赛模型中评估肠道脂质吸收和淋巴功能.
- 使用分子生物学技术研究了DHHC5在血管内皮生长因子受体2 (VEGFR2) 信号传递中的作用及其与CRYBG1的相互作用.
主要成果:
- 由于淋巴功能障碍,Dhhc5-IKO小鼠对饮食诱导的肥胖和肠道脂质吸收受损产生了抵抗力.
- 在LEC中,DHHC5的淘汰会重现这些淋巴缺陷,表明细胞自主作用.
- DHHC5通过增强其局部化到LEC中的脂质来促进VEGFR2信号传递.
- CRYBG1被确定为DHHC5基质;其棕化对VEGFR2脂质局部化至关重要.
结论:
- DHHC5是肠道淋巴完整性和脂质吸收的关键调节者.
- 一个新的DHHC5-CRYBG1-VEGFR2信号轴控制肠道淋巴功能.
- 这些发现为管理脂质代谢和肥胖提供了新的治疗点.
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