Anatomy and regulation of the central melanocortin system.
The central melanocortin system is perhaps the best-characterized neuronal pathway involved in the regulation of energy homeostasis. This collection of circuits is unique in having the capability of sensing signals from a staggering array of hormones, nutrients and afferent neural inputs. It is likely to be involved in integrating long-term adipostatic signals from leptin and insulin, primarily received by the hypothalamus, with acute signals regulating hunger and satiety, primarily received by the brainstem. The system is also unique from a regulatory point of view in that it is composed of fibers expressing both agonists and antagonists of melanocortin receptors. Given that the central melanocortin system is an active target for development of drugs for the treatment of obesity, diabetes and cachexia, it is important to understand the system in its full complexity, including the likelihood that the system also regulates the cardiovascular and reproductive systems.
Cone
Roger D
RD
Vollum Institute and the Center for the Study of Weight Regulation, Oregon Health and Science University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97239, USA. cone@ohsu.edu
D000273:Adipose Tissue / Q000502:physiology; D000818:Animals; D001069:Appetite Regulation / Q000502:physiology*; D001111:Arcuate Nucleus of Hypothalamus / Q000166:cytology / Q000502:physiology*; D001933:Brain Stem / Q000166:cytology / Q000502:physiology*; D004734:Energy Metabolism / Q000502:physiology; D006801:Humans; D009434:Neural Pathways / Q000166:cytology / Q000502:physiology*; D009479:Neuropeptides / Q000378:metabolism; D044101:Receptors, Melanocortin / Q000378:metabolism; D015398:Signal Transduction / Q000502:physiology; D000521:alpha-MSH / Q000378:metabolism*
D009479:Neuropeptides; D044101:Receptors, Melanocortin; D000521:alpha-MSH