alexa Antioxidant enzymatic systems in neuronal and glial cell-enriched fractions of rat brain during aging.
Neurology

Neurology

Journal of Alzheimers Disease & Parkinsonism

Author(s): Geremia E, Baratta D, Zafarana S, Giordano R, Pinizzotto MR, , Geremia E, Baratta D, Zafarana S, Giordano R, Pinizzotto MR,

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Abstract The activities of Cu,Zn superoxide dismutase, glutathione peroxidase, catalase and glutathione reductase in neuronal and glial cell-enriched fractions obtained from the cerebral cortex of rat brain during aging (15, 30, 90, 350, 750 days of age) were assayed. Our results showed that glutathione peroxidase, catalase and glutathione reductase activities varied little during the examined periods. Only the Cu,Zn superoxide dismutase activity decreased notably from 15th to 750th day of age in both neuronal and glial cells, moreover the activities of all enzymes studied were always detected at lower levels in neuronal cells with respect to glial cells. In agreement with diminished SOD activity, the lipid peroxidation showed an elevated increase with aging; this fact is more evident in neuronal than in glial cells. In conclusion our data show that Cu,Zn superoxide dismutase is the most affected antioxidant enzymatic system of brain aging and it could be responsible for the increased lipid peroxidation in both cell types examined.
This article was published in Neurochem Res and referenced in Journal of Alzheimers Disease & Parkinsonism

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