Abstract
Cocaine and amphetamine regulated transcript (CART) decreases feeding and body weight after ventricular injection. CART mRNA and peptide are found in the paraventricular nucleus of the hypothalamus (PVN). The purpose of the present study was to determine effects of PVN-injected CART on feeding and thermogenic capacity. PVN-injected CART (55-102, 100 pmol) significantly decreased NPY-induced feeding at 1, 2 and 4 h, but did not significantly affect deprivation-induced feeding. CART induced gene expression of uncoupling protein 1 (UCP1), UCP2, and UCP3 in brown and white adipose tissue and biceps femoris muscle respectively. These results indicate the PVN as a specific site of CART action, and suggest that CART in the PVN may have an important influence on energy metabolism.
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