补充铁和铁积累促进脂肪细胞热生成通过PGC1α-ATGL介导的脂解
Xudong Mai1, Yifan Liu2, Jigang Fan3
1Department of Endocrinology and Metabolism, Zhujiang Hospital, Southern Medical University, Guangzhou, China; State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China.
The Journal of biological chemistry
|August 19, 2024
概括
由Hfe缺乏引起的铁积累,通过增强线粒体功能来增强脂肪组织热生成. 这表明铁平衡在调节能量消耗和代谢健康方面发挥着关键作用.
科学领域:
- 代谢健康 代谢健康
- 脂肪组织生物学 脂肪组织生物学
- 线粒体功能的功能
背景情况:
- 铁的平衡对于代谢健康至关重要,其失调与慢性代谢疾病有关.
- 脂肪组织热生成是能源消耗的关键调节者.
- 铁积累和脂肪热生成之间的关系尚不清楚.
研究的目的:
- 为了研究铁在脂肪组织热生成中的铁平衡的作用.
- 探索铁积累对脂肪细胞线粒体功能和能量消耗的影响.
主要方法:
- 皮下脂肪组织的RNA测序和生物信息分析.
- 使用缺乏Hfe的小鼠 (Hfe-/-) 来研究铁过载.
- 在体内和体外研究中,使用初级脂肪细胞和脑管血管分离物.
主要成果:
- 铁的恒温标志物参与了冷诱导的热生成.
- Hfe 缺乏导致铁的积累,增强线粒体呼吸链表达和白色脂肪组织的热生成.
- 铁的积累上调了PGC-1α,脂肪甘油三酸脂酶,线粒体生物发生和脂解.
- 在体外,Hfe-/-脂肪细胞显示氧气消耗和线粒体蛋白质表达增加.
- 在野生型脂肪细胞中补充铁的效果模仿了这些发热效应.
结论:
- 由Hfe缺乏或补充引起的铁积累增强了脂肪细胞的热能能力.
- 铁平衡在调节脂肪组织功能和能量消耗方面发挥着重要作用.
相关概念视频
01:24Overview of Lipid Metabolism
1.2K
Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
1.2K
01:06Fats as Energy Storage Molecules
24.8K
Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis...
24.8K