Abstract
The regional distribution of [ 125I]salmon calcitonin (sCT) binding sites was examined in rat brain by receptor autoradiography. Dense specific labeling was recognized over the hypothalamus, preoptic and accumbent nuclei, amygdala, zona incerta, interpeduncular nucleus, periventricular gray and the reticular formation. Intermediate binding was seen over the arcuate and supramamillary nuclei and substantia nigra, and no binding in the neocortex, cerebellum, thalamus, basal ganglia and mamillary bodies. The well defined topographical distribution strongly indicates physiological roles for sCT in the mammalian brain.
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