沙土鼠脑缺血后的自由基损害作用

Involvement of Free Radicals in Postischemic Damage of the Gerbil Brains

The effect of bilateral carotid occlusion for 60 min and reperfusion for 30 min on levels of water and lipid peroxides (LPO) and activities of Na+, K+ -ATPase and superoxide dismutase (SOD) in the forebrain was studied in gerbils (Meriones unguiculatus). Luring occlusion, increased water content and decreased activities of Na+, K+-ATPase and SOD were observed. After reperfusion, the activities of Na+, K+ -ATPase and SOD continued decreasing, but LPO elevated apparently. These results support a hypothesis that the free radicals may contribute to the damage of ischemic brain tissue. Pretreatment of gerbils with allopurinol offered protection to cerebral Na+, K+ -ATPase and SOD subsequent to secondary ischemia.