Oxidative Stress in Patients with Drug Resistant Partial Complex Seizure.

Area of Science:

• Biochemistry
• Neurology
• Pathophysiology

Background:

• Oxidative stress (OS) is implicated in drug-resistant epilepsy (DRE).
• The relationship between OS markers and clinical parameters in DRE is not well understood.

Purpose of the Study:

• To evaluate OS markers and antioxidants in drug-resistant partial complex seizure (DRPCS) patients.
• To correlate these markers with clinical variables such as age of onset, seizure frequency, and number of drugs.

Main Methods:

• Compared 18 DRPCS patients with a control group.
• Measured malondialdehyde (MDA), advanced oxidation protein products (AOPP), advanced glycation end products (AGEs), nitric oxide (NO), uric acid, superoxide dismutase (SOD), glutathione, vitamin C, 4-hydroxy-2-nonenal (4-HNE), and nitrotyrosine (3-NT).
• Used spectrophotometry and Western blot analysis.

Main Results:

• Increased MDA, 3-NT, 4-HNE, and SOD activity in DRPCS patients.
• Decreased AGEs, NO, uric acid, and vitamin C levels.
• Positive correlations found between NO and MDA with the number of drugs.
• 3-NT correlated positively with seizure frequency; MDA negatively with age at onset.
• Vitamin C showed a negative relationship with seizure frequency.

Conclusions:

• An imbalance in the redox state was detected in DRPCS patients.
• Oxidative stress is a relevant mechanism in the pathophysiology of DRPCS.
• Specific oxidant and antioxidant parameters are closely linked with clinical variables in DRPCS.