Shukitt-Hale B
Age (Omaha). 1999 Jan;22(1):9-17. doi: 10.1007/s11357-999-0002-7.
Decrements in motor and cognitive function occur in aging, possibly due to oxidative stress-induced damage to the brain. Declines in antioxidant defense mechanisms have been postulated as a causative factor in these age-related decrements, however a clear link between oxidative stress (OS) and behavioral changes in aging has yet to be established. This review shows that age-validated psychomotor and cognitive tests are sensitive to behavioral deficits under different models of OS, including: 1) decreasing OS protection by depleting glutathione and then increasing the OS with dopamine; 2) 100% oxygen exposure; and 3) radiation. Furthermore, interventions that reduce OS result in concurrent improvements in age-associated behavioral deficits. Therefore, age-related changes in behavior may result from an inability to cope with OS that occurs throughout the life-span.
运动和认知功能的衰退在衰老过程中会出现,这可能是由于氧化应激对大脑造成的损伤。抗氧化防御机制的下降被认为是这些与年龄相关衰退的一个致病因素,然而,氧化应激(OS)与衰老行为变化之间的明确联系尚未确立。这篇综述表明,经过年龄验证的心理运动和认知测试对不同氧化应激模型下的行为缺陷很敏感,这些模型包括:1)通过消耗谷胱甘肽降低氧化应激保护,然后用多巴胺增加氧化应激;2)暴露于100%氧气中;3)辐射。此外,减少氧化应激的干预措施会同时改善与年龄相关的行为缺陷。因此,与年龄相关的行为变化可能是由于无法应对贯穿整个生命周期的氧化应激所致。