Abstract
To test if elevated CRH and decreased NPY might account for pituitary-adrenal activity and hypophagia in dietary protein deprivation, rats received normal or protein-free diet, or were food-or weight-restricted to match effects of protein deprivation. Protein or food restriction increased plasma ACTH. However, hypothalamic CRH mRNA was unchanged by protein deficiency and significantly decreased by food restriction when protein intake was > 50% of normal. Arcuate nucleus NPY mRNA increased in rats given protein-free diet, correlating with leptin rather than decreased feeding. We conclude that CRH and NPY gene expression does not explain adrenocortical axis or feeding activity in protein-deprived rats.
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