Oxidative damage, mitochondrial oxidant generation and antioxidant defenses during aging and in response to food restriction in the mouse

doi:10.1016/0047-6374(94)90104-X

Mechanisms of Ageing and Development

Volume 74, Issues 1–2, May 1994, Pages 121-133

https://doi.org/10.1016/0047-6374(94)90104-X Get rights and content

Abstract

This study was conducted in order to test the concept that oxidative damage is associated with aging and may be a factor in the modulation of life span in response to variations in caloric intake. Mice fed a diet that was 40% lower in calories (DR) than the ad libitum fed (AL) animals exhibited a 43% extension in average life span and a 61% prolongation in mortality rate doubling time. A comparison of AL and DR mice at 9, 17 and 23 months of age indicated that the protein carbonyl content in the brain, heart and kidney increased with age and was significantly greater in the AL than DR group in each organ at each of the three ages. Mitochondrial state 4 or resting respiratory rate increased with age in the AL, but not the DR group, and was also relatively higher in the former. The rates of mitochondrial superoxide and hydrogen peroxide generation increased with age and were higher in the AL than DR mice in all the three organs at each age. In contrast, there was no clear-cut overall pattern of age-related or dietary-related changes in antioxidant defenses provided by superoxide dismutase, catalase and glutathione peroxidase. Results suggest that mechanisms of aging and life span shortening by enhanced caloric intake are associated with oxidative damage arising from corresponding changes in mitochondrial oxidant production. Protein carbonyl content, and mitochondrial O₂^·− and H₂O₂ generation may act as indices of aging.

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Oxidative damage, mitochondrial oxidant generation and antioxidant defenses during aging and in response to food restriction in the mouse

Abstract

J. Nutr.

J. Nutr.

Adv. Free Rad. Biol. Med.

J. Biol. Chem.

Methods Enzymol.

Exp. Mol. Pathol.

Mech. Ageing Dev.

Methods Enzymol.

Anal. Biochem.

J. Biol. Chem.

Mech. Ageing Dev.

Free Rad. Biol. Med.

Mech. Ageing Dev.

Free Rad. Biol. Med.

Mech. Ageing Dev.

Mech. Ageing Dev.