Antiepileptic effect of gap-junction blockers in a rat model of refractory focal cortical epilepsy.
PURPOSE: Epilepsy is the most common serious neurologic disease, and current treatments are ineffective for or=1 h before drug infusion and for >or=3 h afterward. No ill effects were observed. RESULTS: An immediate and marked reduction in percentage of seizure time was seen in rats receiving carbenoxolone (baseline, 69.4%+/- 7.0% (SEM); maximum effect, 9.3%+/- 3.5%, p <or=0.001) and meclofenamic acid (baseline, 58.3%+/- 3.7%; maximum effect, 0.92%+/- 0.92%, p < 0.001). No effect was seen after saline infusion. CONCLUSIONS: Gap-junction blockers applied focally are effective at suppressing seizures and, as such, represent a potential new treatment for epilepsy. Development of focal treatment strategies is essential in this regard.