Molecular and Cellular Biochemistry

, Volume 243, Issue 1, pp 147–152

Oxidative stress and gene expression of antioxidant enzymes in the renal cortex of streptozotocin-induced diabetic rats

  • Pallavi V. Limaye
  • Nandula Raghuram
  • S. Sivakami
Article

DOI: 10.1023/A:1021620414979

Cite this article as:
Limaye, P.V., Raghuram, N. & Sivakami, S. Mol Cell Biochem (2003) 243: 147. doi:10.1023/A:1021620414979

Abstract

The present study was aimed at addressing the effect of hyperglycemia on antioxidant enzymes. The expression of catalase, superoxide dismutase and glutathione peroxidase, the three primary scavenger enzymes involved in detoxifying reactive oxygen species has been evaluated in the renal cortex of rats after 6 weeks of streptozotocin-induced diabetes. Lipid peroxidation and protein oxidation in the renal cortical homogenate were first performed to confirm a state of oxidative stress. The enzyme assays showed significant and varied alterations in catalase, superoxide dismutase and glutathione peroxidase activities. An opposing response of catalase and glutathione peroxidase activities to diabetes was observed. RT-PCR analysis was used to ascertain whether steady-state transcription levels were altered. While an increase in glutathione peroxidase and Cu-Zn superoxide dismutase mRNA parallels the increase in the activities of the enzymes, an increase in catalase gene expression in contrast to a decrease in enzyme activity suggests a role for post-translational modification in altering the activity of this enzyme.

oxidative stresscatalasesuperoxide dismutaseglutathione peroxidasediabetes mellitusreverse transcriptase polymerase chain reaction

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Pallavi V. Limaye
    • 1
  • Nandula Raghuram
    • 1
  • S. Sivakami
    • 1
  1. 1.Department of Life SciencesUniversity of MumbaiMumbaiIndia