The neuronal histamine H(1) and pro-opiomelanocortin-melanocortin 4 receptors: independent regulation of food intake and energy expenditure |
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Authors: | Yoshimatsu Hironobu |
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Affiliation: | Department of Internal Medicine, Faculty of Medicine, Oita University, 1-1 Idaigaoka, Hasama, Oita 879-5593, Japan. hiroy@oita-med.ac.jp |
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Abstract: | Hypothalamic neuronal histamine and its H(1) receptor (H(1)-R) form part of the leptin signaling pathway in the brain, and regulate body weight and adiposity by affecting food intake and energy expenditure. The pro-opiomelanocortin (POMC)-melanocortin 4 receptor (MC4-R) is also important for leptin signaling. We investigated whether and how these two neuronal pathways interact in regulating energy metabolism. From studies of agouti yellow (A(y)/a) obese mice, a model of a defect in POMC-MC4-R signaling, we concluded that the histamine H(1)-R signaling pathway is independent of the POMC-MC4-R complex in regulating food intake, energy metabolism, and adiposity. |
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