Fat accumulation

Fat accumulation refers to the physiological sequestration of lipids, primarily in the form of triglycerides, within specialized adipocytes or ectopically in non-adipose tissues such as the liver, heart, and skeletal muscle (StatPearls: Physiology, Fat Absorption and Storage). This process is governed by the intricate balance of lipogenesis (fat synthesis), lipolysis (fat breakdown), and fatty acid transport, regulated by molecular drivers like Fatty Acid Synthase (FASN), Acetyl-CoA Carboxylase (ACC), and Peroxisome Proliferator-Activated Receptors (PPARs) (PubMed: PMC4985224). While energy storage is a vital survival mechanism, excessive or ectopic fat accumulation is a central hallmark of metabolic diseases, including obesity, type 2 diabetes, and non-alcoholic fatty liver disease (NAFLD) (NIH: NIDDK). Because 'fat accumulation' is a clinical phenotype or biological outcome rather than a single molecular entity, it is not considered a discrete therapeutic target in the traditional sense; instead, drug discovery efforts focus on specific enzymes, transporters, or receptors within the lipid metabolic pathways (Nature Reviews Drug Discovery). Current therapeutic strategies include the use of GLP-1 receptor agonists to reduce systemic adiposity by modulating appetite and insulin sensitivity, and THR-beta agonists to specifically target and reduce hepatic lipid burden (NEJM: Resmetirom Trial).

Other names

Lipid accumulationAdipositySteatosisFatty depositionEctopic lipid depositionIntracellular lipid accumulation

Various mechanisms depending on the specific molecular target, including inhibition of gastrointestinal lipases to prevent fat absorption, activation of GLP-1/GIP receptors to promote satiety and metabolic efficiency, and activation of hepatic thyroid hormone receptors to increase lipid oxidation.