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Effect of pentylenetetrazol-induced epileptic seizure on the antioxidant enzyme activities, glutathione and lipid peroxidation levels in rat erythrocytes and liver tissues.
Clin Biochem. 2005 Nov; 38(11):1009-14.CB

Abstract

OBJECTIVES

In order to clarify whether oxidative stress accompanies epilepsy, we examined the effects of pentylenetetrazol (PTZ)-induced epilepsy on the lipid peroxidation and antioxidant enzyme activities in erythrocytes and liver tissues of adult Wistar rats.

MATERIALS AND METHODS

The activities of antioxidative enzymes (glucose-6-phosphate dehydrogenase (G-6-PD)), copper, zinc-superoxide dismutase (Cu,Zn-SOD), catalase (CAT), selenium-dependent glutathione peroxidase (Se-GSH-Px) and the levels of reduced glutathione (GSH) and thiobarbituric acid-reactive substances (TBARS) were measured in erythrocytes and liver tissues of pentylenetetrazol (PTZ)-induced epileptic adult Wistar rats.

RESULTS

Single PTZ treatment in a convulsive dose of 50 mg/kg significantly reduced the erythrocyte Cu,Zn-SOD, CAT enzyme activities and GSH levels compared to controls (P < 0.001, P < 0.001, P < 0.05, respectively). Erythrocyte and liver tissue TBARS levels in the epileptic group were significantly higher than controls (P < 0.0001). There was a significant decrease in liver tissue Cu,Zn-SOD activity and GSH levels in the epileptic group (P < 0.0001), whereas significantly higher activities of G-6-PD and Se-GSH-Px were found in the epileptic group.

CONCLUSIONS

Our results demonstrate a generalized diminished antioxidant activity and increased TBARS level indicating enhanced oxidative stress in the liver and erythrocytes of epileptic rats. Increased oxidative stress in the liver of epileptic rats might be due to the activation of the recently found glutamate receptors in the liver. These findings suggest that the use of antioxidants with antiepileptic drugs and new drugs such as type-5 metabotropic glutamate receptor (mGlu5) antagonist (MPEP) might protect erythrocytes and liver tissue against anoxic damage and oxidative stress.

Authors+Show Affiliations

Central Laboratory, Faculty of Medicine, Akdeniz University, Antalya, Turkey. halideakbas@akdeniz.edu.trNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16122723

Citation

Akbas, S Halide, et al. "Effect of Pentylenetetrazol-induced Epileptic Seizure On the Antioxidant Enzyme Activities, Glutathione and Lipid Peroxidation Levels in Rat Erythrocytes and Liver Tissues." Clinical Biochemistry, vol. 38, no. 11, 2005, pp. 1009-14.
Akbas SH, Yegin A, Ozben T. Effect of pentylenetetrazol-induced epileptic seizure on the antioxidant enzyme activities, glutathione and lipid peroxidation levels in rat erythrocytes and liver tissues. Clin Biochem. 2005;38(11):1009-14.
Akbas, S. H., Yegin, A., & Ozben, T. (2005). Effect of pentylenetetrazol-induced epileptic seizure on the antioxidant enzyme activities, glutathione and lipid peroxidation levels in rat erythrocytes and liver tissues. Clinical Biochemistry, 38(11), 1009-14.
Akbas SH, Yegin A, Ozben T. Effect of Pentylenetetrazol-induced Epileptic Seizure On the Antioxidant Enzyme Activities, Glutathione and Lipid Peroxidation Levels in Rat Erythrocytes and Liver Tissues. Clin Biochem. 2005;38(11):1009-14. PubMed PMID: 16122723.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of pentylenetetrazol-induced epileptic seizure on the antioxidant enzyme activities, glutathione and lipid peroxidation levels in rat erythrocytes and liver tissues. AU - Akbas,S Halide, AU - Yegin,Aysenur, AU - Ozben,Tomris, Y1 - 2005/08/24/ PY - 2005/05/31/received PY - 2005/07/13/revised PY - 2005/07/25/accepted PY - 2005/8/27/pubmed PY - 2006/2/7/medline PY - 2005/8/27/entrez SP - 1009 EP - 14 JF - Clinical biochemistry JO - Clin Biochem VL - 38 IS - 11 N2 - OBJECTIVES: In order to clarify whether oxidative stress accompanies epilepsy, we examined the effects of pentylenetetrazol (PTZ)-induced epilepsy on the lipid peroxidation and antioxidant enzyme activities in erythrocytes and liver tissues of adult Wistar rats. MATERIALS AND METHODS: The activities of antioxidative enzymes (glucose-6-phosphate dehydrogenase (G-6-PD)), copper, zinc-superoxide dismutase (Cu,Zn-SOD), catalase (CAT), selenium-dependent glutathione peroxidase (Se-GSH-Px) and the levels of reduced glutathione (GSH) and thiobarbituric acid-reactive substances (TBARS) were measured in erythrocytes and liver tissues of pentylenetetrazol (PTZ)-induced epileptic adult Wistar rats. RESULTS: Single PTZ treatment in a convulsive dose of 50 mg/kg significantly reduced the erythrocyte Cu,Zn-SOD, CAT enzyme activities and GSH levels compared to controls (P < 0.001, P < 0.001, P < 0.05, respectively). Erythrocyte and liver tissue TBARS levels in the epileptic group were significantly higher than controls (P < 0.0001). There was a significant decrease in liver tissue Cu,Zn-SOD activity and GSH levels in the epileptic group (P < 0.0001), whereas significantly higher activities of G-6-PD and Se-GSH-Px were found in the epileptic group. CONCLUSIONS: Our results demonstrate a generalized diminished antioxidant activity and increased TBARS level indicating enhanced oxidative stress in the liver and erythrocytes of epileptic rats. Increased oxidative stress in the liver of epileptic rats might be due to the activation of the recently found glutamate receptors in the liver. These findings suggest that the use of antioxidants with antiepileptic drugs and new drugs such as type-5 metabotropic glutamate receptor (mGlu5) antagonist (MPEP) might protect erythrocytes and liver tissue against anoxic damage and oxidative stress. SN - 0009-9120 UR - https://www.unboundmedicine.com/medline/citation/16122723/Effect_of_pentylenetetrazol_induced_epileptic_seizure_on_the_antioxidant_enzyme_activities_glutathione_and_lipid_peroxidation_levels_in_rat_erythrocytes_and_liver_tissues_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0009-9120(05)00223-7 DB - PRIME DP - Unbound Medicine ER -