Liver Protein Metabolism
Liver Protein Metabolism - Related Videos
06:26
Mouse Model of Metabolic Dysfunction-Associated Steatotic Liver Disease with Fibrosis
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Cited by 1 •
2025
Mouse model of metabolic dysfunction-associated steatotic liver disease (MASLD) with metabolic dysfunction, hepatic gene expression changes, and liver histopathological alterations that resemble human MASLD, including fibrosis that progresses to advanced fibrosis stage 3. This model can be used in studies of MASLD pathophysiology and in pre-clinical studies of new therapies.
01:21
Overview of Protein Metabolism
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2024
Proteins are broken down into amino acids during digestion. Unlike fats and carbohydrates, which are stored for later use, proteins are not. Instead, amino acids are either used to produce ATP through oxidation or contribute to the creation of new proteins for the growth and repair of the body. Any surplus amino acids from the diet are converted into glucose or triglycerides rather than excreted. Amino acids play various roles in the body once they are absorbed into cells. They are restructured...
12:13
Ex Situ Normothermic Machine Perfusion of Donor Livers
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Cited by 21 •
2015
Here we present a protocol describing oxygenated ex situ machine perfusion of donor liver grafts. This article contains a step by step protocol to procure and prepare the liver graft for machine perfusion, prepare the perfusion fluid, prime the perfusion machine and perform oxygenated normothermic machine perfusion of the liver graft.
00:52
What is Metabolism?
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2019
Overview Metabolism represents all of the chemical activity in a cell, including reactions that build molecules (anabolism) and those that break molecules down (catabolism). Anabolic reactions require energy, whereas catabolic reactions provide it. Thus, metabolism describes how cells transform energy through a variety of chemical reactions, which are often made more efficient with the help of enzymes. Metabolism Is the Sum of All of the Chemical Reactions That Take Place in an Organism
12:35
In vivo Liver Endocytosis Followed by Purification of Liver Cells by Liver Perfusion
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Cited by 14 •
2011
The study of liver sinusoidal endothelial cells (SECs) must be performed with primary cells obtained from the animal as no cell lines exist. This method relies on liver digestion and differential centrifugation for SEC purification for subsequent culturing and experimentation.
FAQs
Transamination transfers an amino group from one molecule to another, while deamination removes the amino group from an amino acid. These reactions provide hepatocytes with different ways to process nitrogen before it enters ammonia-handling pathways. Distinguishing them helps explain how the liver separates nitrogen disposal from the reuse or oxidation of the remaining carbon-containing components.
The urea cycle converts ammonia produced during amino acid breakdown into urea. This transformation is important because ammonia must be handled safely before nitrogen leaves the body through excretion. In liver protein metabolism, the cycle therefore links amino acid degradation with whole-body nitrogen balance, and impaired handling can affect physiology beyond the liver itself.
After amino groups are transferred or removed, the remaining carbon skeletons can support glucose production or energy production. Their destination allows amino acid breakdown to contribute to broader metabolic needs rather than serving only nitrogen disposal. This connection explains why liver protein metabolism influences energy availability as well as the processing of dietary and body proteins.
The liver synthesizes albumin and many coagulation factors, so its protein-related activity contributes directly to the composition and functional properties of blood. Albumin is identified as a major plasma protein, while coagulation factors support clotting. Consequently, studying hepatic protein metabolism provides context for interpreting changes in blood chemistry and protein-related physiology.
Nutritional conditions affect the supply and use of amino acids, making hepatic processing relevant to protein balance and energy production. The liver can direct amino acid components toward nitrogen disposal, glucose production, or energy production. This makes the pathway useful for understanding how nutrition relates to circulating proteins and the body’s handling of protein-derived materials.
Disrupted hepatic processing can affect both nitrogen handling and the production of major plasma proteins. Problems with ammonia disposal may alter whole-body physiology, while reduced synthesis of albumin or coagulation factors can change blood chemistry and clotting-related function. These outcomes make liver protein metabolism a useful framework for connecting cellular pathways with clinical features of liver disease.