Abstract
The contents of beta-endorphin (BE), methionine-enkephalin (MEK), and adrenocorticotropic hormone (ACTH) in the hypophysis and hypothalamus of intact 4- to 6-week-old and 16-week-old Wistar rats was studied. The maximum BE concentration was found in the hypophysis, whereas the maximum MEK and ACTH concentrations were found in the hypothalamus. Aging was followed by a decrease in the concentrations of all above substances, except BE, whose concentration in the hypophysis of the older rat group was markedly higher than in the hypophysis of 4- to 6-week-old animals.
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Voloshin, A.N., Komarevtseva, I.A. Content of endogenous opiates and adrenocorticotropic hormone in the brain structures of rats of different ages. Neurophysiology 29, 127–129 (1997). https://doi.org/10.1007/BF02463285
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DOI: https://doi.org/10.1007/BF02463285