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Naveilhan, P. et al.

Naveilhan, Hassani, Canals, Ekstrand, Larefalk, Chhajlani, Arenas, Gedda, Svensson, Thoren, Ernfors,

Normal feeding behavior, body weight and leptin response require the neuropeptide Y Y2 receptor.

Neuropeptide Y (NPY), a 36-amino-acid peptide widely expressed in the brain is involved in many physiological responses, including hypothalamic control of food intake and cardiovascular homeostasis. NPY mediates its effects through binding to the Y1, Y2 and Y5 G-protein-coupled receptors. Little is known of the role of the Y2 receptor in mediating the different NPY effects. We inactivated the Y2 receptor subtype in mice and found that these mice developed increased body weight, food intake and fat deposition. The null mutant mice showed an attenuated response to leptin administration but a normal response to NPY-induced food intake and intact regulation of re-feeding and body weight after starvation. An absence of the Y2 receptor subtype also affected the basal control of heart rate, but did not influence blood pressure. These findings indicate an inhibitory role for the Y2 receptor subtype in the central regulation of body weight and control of food intake.[1]

References

Normal feeding behavior, body weight and leptin response require the neuropeptide Y Y2 receptor. Naveilhan, P., Hassani, H., Canals, J.M., Ekstrand, A.J., Larefalk, A., Chhajlani, V., Arenas, E., Gedda, K., Svensson, L., Thoren, P., Ernfors, P. Nat. Med. (1999) [Pubmed]

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