The physiological process involving the deliberate increase in the breakdown of stored triglycerides within adipocytes, or fat cells, into glycerol and free fatty acids. This enhancement is a key component of energy mobilization, shifting the body toward utilizing fat reserves for metabolic fuel. Clinically, optimizing this process is central to body composition management and addressing excess adipose tissue.
Origin
This term is a compound phrase rooted in endocrinology and cellular biology. Adipocyte derives from the Latin adeps (fat) and Greek kytos (hollow vessel or cell). Lipolysis combines Greek lipos (fat) and lysis (loosening or breaking down), while Enhancement signifies an intentional increase in this biological activity. The concept originates from the study of lipid metabolism and its hormonal regulation.
Mechanism
Enhancement of adipocyte lipolysis is typically mediated by the activation of hormone-sensitive lipase (HSL) and adipose triglyceride lipase (ATGL) through signaling cascades. Catecholamines like epinephrine and norepinephrine bind to beta-adrenergic receptors on the adipocyte surface, triggering an increase in intracellular cyclic AMP (cAMP). This rise in cAMP activates Protein Kinase A (PKA), which then phosphorylates and activates HSL and ATGL, thereby accelerating the hydrolysis of stored fat.
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