Melanin-concentrating hormone
Melanin-concentrating hormone (MCH) is a cyclic amino acid peptide that plays a crucial role in the regulation of energy homeostasis, feeding behavior, and sleep-wake cycle. It is primarily produced in the lateral hypothalamus and zona incerta of the mammalian brain.
Function[edit]
MCH acts as a potent stimulator of food intake and decreases energy expenditure. It is involved in the regulation of body weight and metabolism. MCH also plays a role in the regulation of sleep and arousal. It promotes REM sleep and increases the total sleep time.
Structure[edit]
MCH is a 19-amino acid cyclic peptide. It is derived from a larger precursor protein, prepro-MCH, which also gives rise to neuropeptide EI and neuropeptide GE. The MCH peptide is highly conserved across species, indicating its important role in physiological processes.
Receptors[edit]
MCH acts through two known receptors, MCH1 and MCH2, which are G protein-coupled receptors. These receptors are widely distributed in the brain, with high concentrations in areas involved in the regulation of feeding and energy balance.
Role in Disease[edit]
Alterations in the MCH system have been implicated in a variety of diseases, including obesity, diabetes, sleep disorders, and depression. MCH receptor antagonists are being investigated as potential treatments for these conditions.
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