Effect of aerobic physical exercise in pinealectomized animals submitted to the pilocarpine model of epilepsy

Abstract

OBJECTIVE: To better clarify the positive effects of physical exercise in the epilepsy, we analyzed the effect of the pinealectomy in animals with temporal lobe epilepsy (TLE) induced by pilocarpine submitted to an aerobic physical program. MATERIAL AND METHODS: Forty adults Wistar rats were used: 1) PX + CHRONIC - Pinealectomized animals (PX) with TLE (CHRONIC) without exercise (n = 9); 2) PX + CHRONIC + EXERCISE - submitted to an aerobic physical exercise program (n = 5); 3) CHRONIC - without exercise (n = 8); 4) CHRONIC + EXERCISE (n = 8); 5) CTRL - control without exercise (n = 5); 6) CTRL + EXERCISE (n = 5). The physical exercise program consisted of 1 hour of treadmill, 5 days/week, during 30 days, at 60% VO2max. The Nissl and neo-Timm methods were used. RESULTS: The pinealectomy increased the frequency of seizures in animals with epilepsy. It was observed a reduction of the neuronal death and mossy fiber sprouting in the animals with epilepsy submitted to an aerobic physical exercise program. However, the physical exercise program did not modify the frequency of the seizures in the pinealectomized animals.