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Melanocortin receptor accessory protein 2-induced adrenocorticotropic hormone response of human melanocortin 4 receptor

AuthorsSoletto, L.; Hernández-Balfagó, Sergio; Rocha, Ana; Scheerer, Patrick; Kleinau, Gunnar; Cerdá-Reverter, José Miguel
Issue DateFeb-2019
PublisherOxford University Press
CitationJournal of the Endocrine Society 3(2): 314–323 (2019)
AbstractMelanocortin 4 receptor (MC4R), a canonical melanocyte-stimulating hormone receptor, is the main responsible for monogenic obesity in humans. Previous studies in fish and avian species showed that MC4R becomes an ACTH receptor after interaction with the melanocortin receptor accessory protein 2 (MRAP2). We show that human MC4R behaves in a similar way through its interaction with MRAP2. This evolutionary conservation of MRAP2-induced ligand selectivity supports a physiological role for the interaction with MC4R. Both proteins are coexpressed in the same hypothalamic neurons, providing an anatomical substrate and molecular mechanism for the central therapeutic actions of ACTH in the treatment of infantile spasms. These neurons may link the effects of stress on the energy balance independently of glucocorticoid secretion. The complex MC4R-MRAP2 throws light on the action of ACTH and, by extension, on the relay of stress-related information to additional biological systems.
Publisher version (URL)http://dx.doi.org/10.1210/js.2018-00370
Appears in Collections:(IATS) Artículos
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