相关实验视频
Updated: Jul 16, 2026

10:28
Body Composition and Metabolic Caging Analysis in High Fat Fed Mice
Published on: May 24, 2018
在缺乏脂肪甘油三酸脂酶的小鼠中,缺陷的脂解和改变的能量代谢
Guenter Haemmerle1, Achim Lass, Robert Zimmermann
1Institute of Molecular Biosciences, University of Graz, Austria.
概括
在小鼠中,脂肪甘油三酸脂酶 (ATGL) 的遗传失活化会增加脂肪的储存,并导致器官损伤. 这突出了ATGL的ATGL.
科学领域:
- 代谢过程中的代谢.
- 生物化学 生物化学
- 生理学 生理学 生理学
背景情况:
- 脂肪组织是脊椎动物的主要能量储备.
- 脂酶是从储存的脂肪中释放自由脂肪酸 (FFAs) 的关键酶.
- 脂肪三甘油脂酶 (ATGL) 在脂肪调动中起着关键作用.
研究的目的:
- 在小鼠中研究ATGL缺乏的生理后果.
- 确定ATGL在能量稳态,脂肪代谢和组织特异性脂质沉积中的作用.
主要方法:
- 在小鼠中ATGL基因的遗传失活化.
- 脂肪质量,组织三糖醇含量和脂质沉积的分析.
- 评估心脏功能,适应寒冷,葡萄糖代谢和胰岛素敏感性.
主要成果:
- 缺乏ATGL导致脂肪质量增加和多种组织 (包括心脏) 中的三糖醇积累.
- 缺乏ATGL的小鼠表现出心脏功能障碍,过早死亡和寒冷适应能力受损.
- 降低ATGL活性导致葡萄糖利用率增加,葡萄糖耐受性增强,胰岛素敏感性改善.
结论:
- ATGL 是细胞脂肪储存的分解速度限制酶.
- ATGL对于提供FFAs来推动热生成和保持能量平衡至关重要.
- 缺乏ATGL显著影响能量平衡,导致代谢和心脏并发症.
相关概念视频
Fats as Energy Storage Molecules
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 directly...
Fats as Energy Storage Molecules
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 directly...
Overview of Lipid Metabolism
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...
Inborn Errors of Metabolism
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
Lipid Catabolism
Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...

