抑制肝氧酸盐过度产生改善了与代谢功能障碍相关的脂肪肝炎
Sandeep Das1, Alexandra C Finney1, Sumit Kumar Anand1
1Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center-Shreveport, Shreveport, LA, USA.
Nature metabolism
|September 27, 2024
概括
代谢功能障碍相关的脂肪肝炎 (MASH) 涉及由于抑制的AGXT和激活的LDHA而导致的氧酸盐过度生产. 向氧沙酸盐为MASH提供了一个新的治疗策略.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 代谢疾病 代谢疾病
- 生物化学 生物化学
背景情况:
- 代谢功能障碍相关的脂肪肝炎 (MASH) 正在增加,需要新的治疗点.
- 氧沙酸盐是一种代谢物,通过糖氧酸盐代谢与肝脏健康有关.
研究的目的:
- 为了研究肝氧酸盐代谢在MASH病变发生中的作用.
- 探索酸盐过度生产作为MASH的潜在治疗点.
主要方法:
- 在人类和老鼠MASH肝脏中分析AGXT和LDHA表达.
- 评估氧沙酸对肝细胞和单细胞化学反应的影响.
- 在饮食诱导的MASH小鼠模型中评估AGXT过度表达和LDHA抑制.
主要成果:
- 在MASH肝脏中,AGXT被抑制,LDHA被激活,导致氧酸盐的过度生产.
- 氧沙酸抑制了PPARα,减少了脂肪酸氧化,并增加了单细胞化学反应.
- 在小鼠中,AGXT恢复或LDHA抑制减少了MASH,纤维化和炎症.
结论:
- 肝氧酸盐的过度生产是MASH的关键驱动因素.
- 通过AGXT或LDHA准氧酸盐代谢,对MASH治疗有希望.
相关概念视频
Lipid-Lowering Drugs: Statins and Miscellaneous Agents
581
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...
581
Phase I Oxidative Reactions: Overview
246
Phase I biotransformation, or functionalization, is a crucial chemical process that converts drugs and other xenobiotics into more water-soluble forms, facilitating expulsion from the body. It involves oxidative, reductive, and hydrolytic reactions that add or unveil polar functional groups on lipophilic substrates. Key players in phase I reactions are the mixed-function oxidases. Situated in liver cell microsomes, these enzymes predominantly carry out drug metabolism. They require molecular...
246
Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems
151
Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
151
Drug Metabolism: Phase I Reactions
3.2K
A phase I reaction is a biochemical process that introduces a functionally reactive polar group to a substance. This transformation predominantly occurs in the liver, facilitated by the cytochrome P450 system of hemoproteins situated in the lipophilic endoplasmic reticulum of cells. The metabolite generated through this process can have varying polarities. If it is sufficiently polar, it can be easily excreted in the urine due to its water compatibility. However, if the metabolite is nonpolar,...
3.2K
Feedback Inhibition
53.7K
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
53.7K
Drug Metabolism: Phase II Reactions
3.7K
Phase II reactions are essential for the detoxification and elimination of drugs from the body. These reactions involve the conjugation of parent drugs or their phase I metabolites with endogenous molecules, resulting in more hydrophilic drug conjugates. The primary conjugation reactions in this phase are sulfation and glucuronidation. Both sulfation and glucuronidation typically produce biologically inactive metabolites. However, in some cases involving prodrugs, active metabolites may be...
3.7K


