羟自由基和脑缺血

羟自由基是一种活性高、毒性大的自由基,它在脑缺血及其再灌注的损伤中起着重要的作用,是自由基造成神经细胞死亡的关键环节之一。本文从以下几个方面加以综述,脑缺血中羟自由基产生的可能途径;脑缺血中羟自由基的变化;羟自由基在脑缺血性神经元损伤中的作用以及羟自由基清除剂对脑缺血的保护作用。

Hydroxyl radical and cerebral ischemia

Free radicals are extensively existed in aerobic organisms with high reactivity. In cerebral ischemia, free radicals can be generated in excess of cellular antioxidant capacity resulting in severe damage. Hydroxyl radical is one of the most potent and reactive species. It plays a key role in neuronal damage induced by ischemia and reperfu-sion. This review will focus on: possible routes forthe formation of hydroxyl radical during cerebral ischemia; changes of hydroxyl radical contents induced by ischemia; the effect of hydroxyl radical on ischemic neuronal damage; the protective effects of hydroxyl radical scavengers on neuronal damage induced by ischemia.