The selective Na+-Ca2+ exchange inhibitor attenuates brain edema after radiofrequency lesion in rats.

Abstract 2-[4-[(2,5-Difluorophenyl)methoxy]phenoxy]-5-ethoxyaniline (SEA0400), a specific inhibitor of the Na + –Ca 2+ exchanger, exerts cytoprotectiveaction and reduces brain infarct volume after cerebral ischemia. We examined the effect of SEA0400 on vasogenic brain edema in rats. Histological observations showed that radiofrequency current caused brain infarct and extravasationof endogenous albumin in the brain. SEA0400 (3 and 10 mg/kg, i.v.) significantly suppressed the increase in brain water content with attenuation of Evans bluedye and sodium fluorescein extravasationafter radiofrequency lesion. The findings suggest that the Na + –Ca 2+ exchanger plays a role in vasogenic edema formation after radiofrequency lesion.