Effect of MPTP and l-Deprenyl on Antioxidant Enzymes and Lipid Peroxidation Levels in Mouse Brain
Article first published online: 23 NOV 2002
Journal of Neurochemistry
Volume 65, Issue 6, pages 2725–2733, December 1995
How to Cite
Thiffault, C., Aumont, N., Quirion, R. and Poirier, J. (1995), Effect of MPTP and l-Deprenyl on Antioxidant Enzymes and Lipid Peroxidation Levels in Mouse Brain. Journal of Neurochemistry, 65: 2725–2733. doi: 10.1046/j.1471-4159.1995.65062725.x
- Issue published online: 23 NOV 2002
- Article first published online: 23 NOV 2002
- Received March 1, 1995; revised manuscript received June 9, 1995; accepted June 14, 1995.
- Superoxide dismutase;
- Glutathione peroxidase;
- Lipid peroxidation
Abstract: Excessive free radical formation or antioxidant enzyme deficiency can result in oxidative stress, a mechanism proposed in the toxicity of MPTP and in the etiology of Parkinson's disease (PD). However, it is unclear if altered antioxidant enzyme activity is sufficient to increase lipid peroxidation in PD. We therefore investigated if MPTP can alter the activity of the antioxidant enzymes, superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-PX) and the level of lipid peroxidation. l-Deprenyl, prior to MPTP administration, is used to inhibit MPP+ formation and its subsequent effect on antioxidant enzymes. MPTP induced a threefold increase in SOD activity in the striatum of C57BL/6 mice. No parallel increase in GSH-PX or CAT activities was observed, while striatal lipid peroxidation decreased. At the level of the substantia nigra (SN), even though increases in CAT activity and reduction in SOD and GSH-PX activities were detected, lipid peroxidation was not altered. Interestingly, l-deprenyl induced similar changes in antioxidant enzymes and lipid peroxidation levels, as did MPTP. Taken together, these results suggest that an alteration in SOD activity, without compensatory increases in CAT or GSH-PX activities, is not sufficient to induce lipid peroxidation.