Circadian and age-related changes in stress responsiveness of the adrenal cortex and erythrocyte antioxidant enzymes in female rhesus monkeys

Journal of Medical Primatology
Nadezhda D GoncharovaBoris A Lapin

Abstract

The objective of this study was to evaluate the role of the adrenal cortex in the regulation of antioxidant enzyme defense and to characterize this regulation in different age periods. Five young and five old female rhesus monkeys were subjected to 2 hours squeeze cage restraint stress at 0900 or 1500 hours. Plasma levels of corticosteroids and activities of erythrocyte antioxidant enzymes were measured before the stress and 30, 60, 120, 240 minutes after beginning of the stress. Young monkeys showed a circadian rhythm in stress responsiveness as measured by corticosteroids and glutathione reductase. The rhythm was attenuated in old animals. Age-related changes in the overall level of response to the afternoon stress were also seen in the corticosteroid and glutathione reductase measures. The study demonstrated that corticosteroids play an essential role in the regulation of antioxidant enzyme defense in stress conditions and that the reliability of their regulation decreases with age.

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Citations

Nov 6, 2010·Biogerontology·Vladimir N AnisimovOlga N Mikhailova
Feb 16, 2008·Journal of Assisted Reproduction and Genetics·Katrina NakamuraPetra Clara Arck
Dec 4, 2012·Antioxidants & Redox Signaling·Melissa WilkingNihal Ahmad
Mar 14, 2014·The Journal of Endocrinology·R PrasadL A Metherell
Oct 14, 2014·Advances in Gerontology = Uspekhi Gerontologii·N D Goncharova
Apr 25, 2009·Current Opinion in Endocrinology, Diabetes, and Obesity

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