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  • Title: Biological examination of melanin concentrating hormone receptor 1: multi-tasking from the hypothalamus.
    Author: Rokosz LL, Hobbs DW.
    Journal: Timely Top Med Cardiovasc Dis; 2006 Sep 01; 10():E23. PubMed ID: 17066150.
    Abstract:
    Since its discovery as the first receptor for the orexigenic neuropeptide melanin-concentrating hormone (MCH), the MCH receptor, MCHR1, has been actively pursued for therapeutic intervention in the treatment of obesity. Mice with targeted deletion of MCHR1 or its cognate ligand, MCH, generally have decreased body weight and fat mass and are resistant to diet-induced obesity compared with their wild-type counterparts. Mice treated via intracerebroventricular infusion with MCH, or that overexpress MCH or MCHR1, exhibit weight gain compared with control animals. MCHR1 is also a central target of leptin signaling and appears to be a mediator of insulin resistance. The distribution of MCH and MCHR1 in rat brain, outside of regions that control appetite and satiety, has led to the finding that MCH signaling participates in other functions such as emotion and stress. This review will describe in detail the biological studies that show how MCH and MCHR1 control numerous physiological functions. The current status of the development of MCHR1 antagonists for clinical use will also be assessed. Given the substantial link between obesity and its many associated afflictions, a single pharmaceutical agent that could be used to treat multiple pathologies would be welcome.
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