The clinical use of specific short-chain amino acid compounds (peptides) as pharmaceutical or therapeutic agents to modulate key regulatory pathways involved in energy homeostasis, nutrient partitioning, and body composition. This targeted therapy is employed to correct metabolic dysfunctions, enhance lipolysis, improve insulin sensitivity, and promote muscle growth. Peptides act as highly specific signaling molecules, offering a precision approach to metabolic health optimization.
Origin
Peptide therapy is rooted in molecular endocrinology, specifically the study of endogenous signaling peptides like growth hormone-releasing hormone (GHRH) and various gut hormones (e.g., GLP-1). The clinical application expanded with the ability to synthesize stable, bioavailable analogues of these native compounds. Its use for ‘metabolism’ is a modern development, leveraging the regulatory power of these molecules to treat conditions like obesity and metabolic syndrome.
Mechanism
The mechanism of action is highly specific, as peptides bind to and activate or inhibit specific G-protein coupled receptors (GPCRs) on target cells, thereby initiating a cascade of intracellular signaling events. For metabolic purposes, peptides often mimic or enhance the action of endogenous hormones, such as stimulating the pulsatile release of growth hormone to increase lipolysis and IGF-1, or improving glucose tolerance by mimicking incretin hormones. This targeted signaling allows for potent physiological effects with reduced systemic side effects.
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