Platelet monoamine oxidase-A activity and aging: effect of carnosine

• Published in: The journal of physiological sciences Vol. 63; no. 4; pp. 279 - 285
• Main Authors: Banerjee, S, Poddar, M K
• Format: Journal Article
• Language: English
• Published: Japan Springer Japan 01.07.2013
• Subjects: Aging - drug effects; Animals; Blood Platelets - enzymology; Carnosine - pharmacology; Kinetics; Male; Monoamine Oxidase - blood; Monoamine Oxidase - drug effects; Original Paper; Rats; Rats, Wistar; Serotonin - administration & dosage
• ISSN: 1880-6546; 1880-6562
• DOI: 10.1007/s12576-013-0264-9

Platelet mitochondrial MAO-A activity of male albino rats (Wistar strain) was significantly inhibited with an inhibition of its only V max during aging. This age-induced inhibition of platelet MAO-A activity became reversed following the application of higher dosages (2.0-2.5 μg/kg/day, i.t. for 21 consecutive days) of carnosine. Though carnosine at lower dosage (0.5 μg/kg/day, i.t. for 21 consecutive days) was ineffective to platelet mitochondrial MAO-A activity in both young and aged rats, at higher dosages (2.0-2.5 μg/kg/day, i.t. for 21 consecutive days) under similar condition this enzyme activity was significantly enhanced. Carnosine at 1.0 μg/kg/day, i.t. for 21 consecutive days significantly enhanced MAO-A activity only in aged (18 and 24 months) rats. These results suggest that carnosine withdraws the aging-induced inhibition of mammalian blood platelet MAO-A activity and restores its activity towards that (MAO-A activity) observed in young mammalian blood platelets.