Immunohistochemistry and Western blotting were used to determine the distribution of orexin receptors in the rat brain. Strong orexin receptor 1 (OX1R) immunoreactivity was detected in the hypothalamus including the arcuate, ventromedial, and tuberomammillary nuclei that are involved in feeding regulation. The neuropeptide Y- and proopiomelanocortin-containing neurons of the arcuate nucleus, which act to stimulate or to inhibit feeding, respectively, displayed intense OX1R immunoreactivity by double immunostaining. Western blotting analysis yielded a 50-kDa major band of OX1R.
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| http://dx.doi.org/10.1016/s0304-3940(02)00140-4 | DOI Listing |
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