生成通过延伸到整体脂肪氧化率之外的机制,防止MASLD-MASH进展
bioRxiv : the preprint server for biology
|October 28, 2024
概括
生成和脂肪氧化与代谢功能障碍相关的脂肪肝炎 (MASH) 中的肝损伤相关. 然而,代功能受损使MASH状况恶化,这表明代提供了超越脂肪氧化之外的保护.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 代谢生物化学 代谢生物化学
- 肝脏疾病的发病因子 肝脏疾病的发病因子
背景情况:
- 与代谢功能障碍相关的脂肪性肝病 (MASLD) 到MASH的进展涉及复杂的代谢转变.
- 了解肝氧化途径在MASLD-MASH病变发生过程中的作用至关重要.
研究的目的:
- 在MASLD-MASH.中量化肝氧化途径对肝损伤的贡献.
- 调查生成在MASLD-MASH进展中的作用.
主要方法:
- 在患有MASLD-MASH的人群中,稳定同位素追踪和多组学 (NMR,UHPLC-MS,GC-MS)
- 流量建模以量化肝脏氧化流量.
- 功能丧失的小鼠模型针对代酶 (HMGCS2,BDH1).
主要成果:
- 在MASH患者中,肝损伤与生成和总脂肪氧化有正相关.
- 破坏HMGCS2 (限制速率的生成) 损害了脂肪氧化,并诱导了小鼠的MASH类表型.
- 破坏BDH1 (终端生成) 损害了脂肪氧化,但没有恶化脂肪性肝损伤.
结论:
- 整体肝脂肪氧化率可能不是 MASLD 到 MASH 进展的主要驱动因素.
- 肝生成可能通过超出简单脂肪氧化率的机制在MASLD-MASH中发挥保护作用.
更多相关视频
相关概念视频
Overview of Lipid Metabolism
1.1K
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...
1.1K
Inborn Errors of Metabolism
139
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...
139
Abnormal Proliferation
4.5K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.5K
Metabolic States of the Body: Fasting and Starvation
1.1K
During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
1.1K
Overview of Metabolism
29.5K
Living cells constantly carry out various chemical reactions which are necessary for their proper functioning. These reactions are interlinked to one another via multiple pathways. The collection of these chemical reactions is known as metabolism.
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
Plant Metabolism
Sunlight, the primary source of energy in plants, is first absorbed by the chlorophyll pigments present in their leaves. Plants then use this energy to carry out photosynthesis, where water is oxidized into oxygen and carbon dioxide...
29.5K
mTOR Signaling and Cancer Progression
3.7K
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
3.7K


