微体三糖转移蛋白中的编码变体减少了肝硬化和血脂质的发生
Carolin V Schneider1,2,3, Leonida Hehl1, Kate T Creasy4
1Department of Medicine III, Gastroenterology, Metabolic Diseases and Intensive Care, University Hospital RWTH Aachen, Aachen, Germany.
Alimentary pharmacology & therapeutics
|May 30, 2023
概括
微体三糖转移蛋白 (MTP) 基因的特定变异MTTP I128T与降低肝硬化和降低血液脂质有关. 这一发现表明MTP在脂质代谢中起着复杂的作用.
科学领域:
- 遗传学和分子生物学
- 心血管和代谢疾病 心血管和代谢疾病
- 生物化学 生物化学
背景情况:
- 微体三糖转移蛋白 (MTP) 对VLDL分泌至关重要,影响血清脂质和apoB水平.
- 抑制MTP会减少VLDL的分泌,但可能导致肝硬化.
- 了解MTP的作用是管理脂质疾病的关键.
研究的目的:
- 研究MTTP基因误解变异对肝脏和循环脂质水平的影响.
- 探索MTTP变体与代谢,肝脏和临床表型之间的关联.
主要方法:
- 在大型生物库 (Penn Medicine Biobank和英国生物库) 中分析MTTP误解变体.
- 与活检和成像证明的肝肥胖症的关联研究.
- 检查对等离子体脂质的影响,包括LDL胆固醇和apoB.
主要成果:
- 在这两种生物库中,MTTP I128T变体 (rs3816873-A) 与肝硬化症的减少显著相关.
- 携带MTTP I128T的携带者表现出较低的肝肥胖症的患病率.
- 这种变体也与血LDL胆固醇和apoB水平的降低有意想不到的联系.
结论:
- MTTP I128T变体显示出与减少肝硬化和降低血脂的矛盾联系.
- 这个概况挑战了MTP活动的简单的功能增益或丧失模型.
- 对MTTP I128T的进一步研究可能会揭示用于调节MTP功能和管理脂质疾病的新型治疗策略.
相关概念视频
01:25Lipid Catabolism
109
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...
109
01:20Lipid-Lowering Drugs: Statins and Miscellaneous Agents
717
Hyperlipidemia, a medical condition often referred to as high cholesterol, is characterized by abnormally elevated levels of lipids in the bloodstream. When present in excess, these lipids, specifically cholesterol and triglycerides, can lead to serious health complications, often involving cardiovascular diseases. Illnesses like atherosclerosis, heart attacks, and pancreatitis have all been linked to untreated hyperlipidemia. This means controlling and regulating cholesterol and triglyceride...
717
01:24Lipid Absorption
550
Dietary triglycerides from chyme in the duodenum are mixed with bile salts produced by the liver to emulsify fats. As a result, large droplets are broken down into smaller ones, increasing the surface area for enzymatic action. Once emulsified, pancreatic lipases hydrolyze the triglycerides into free fatty acids and monoglycerides.
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
550
01:06Lipid Digestion
92.3K
Lipids are large molecules that are generally not water-soluble. Since most of the digestive enzymes in the human body are water-based, there are specific steps the body must take to break down lipids and make them available for use.
92.3K
01:24Overview of Lipid Metabolism
1.9K
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...
1.9K
01:31Lipid-derived Compounds in the Human Body
4.4K
Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin,...
4.4K