摘要
目的观察ɑ-硫辛酸(alpha-lipoic acid,ALA)对缺氧缺血性脑损伤(hypoxic-ischemic brain damage,HIBD)新生大鼠脑组织氧化应激指标超氧化物歧化酶(superoxide dismutase,SOD)、丙二醛(malondialdehyde,MDA)、谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-PX)及脑水肿的影响,探讨ɑ-硫辛酸对新生大鼠缺氧缺血性脑损伤的保护作用。方法随机将7日龄Wistar大鼠108只分为3组,假手术组(n=36);缺氧缺血模型组(HIBD,n=36);ALA治疗组(n=36);根据造模后处死时间,各组又分1、3、7 d亚组,每亚组各12只。按RICE法制备新生大鼠HIBD模型。治疗组分别于造模后即开始腹腔注射ALA 100 mg/kg,每天2次,连续5d;假手术组及HIBD模型组于相应时点腹腔注射等量生理盐水。造模后1、3、7 d断头处死取脑,采用干湿质量法测定脑组织含水量,采用比色法检测脑组织匀浆SOD、MDA和GSH-PX的含量。结果 HIBD组与假手术组比较,各时间点脑组织匀浆SOD、GSH-PX降低、MDA升高,脑组织含水量升高(P<0.05)。治疗组与HIBD组比较,各时间点脑组织匀浆GSH-PX回升,脑组织含水量回降(P<0.05)。治疗组与HIBD组比较,造模后1 d时,SOD、MDA差异无统计学意义,造模后3、7 d时,SOD回升,MDA回降(P<0.05)。结论ɑ-硫辛酸对新生大鼠缺氧缺血性脑损伤有保护作用,可减轻缺氧缺血性脑损伤后脑水肿,而其机制之一可能是ɑ-硫辛酸能减轻缺氧缺血所致的脑组织氧化应激损伤。
Objective To investigate the effect of alpha-lipoic acid on oxidative stress and cerebral edema after hypoxic-ischemic brain damage (HIBD)in neonatal rats.Methods A total of 108 neonatal 7-day-old Wistar rats were randomly divided into 3 groups:sham-operated group(sham, n=36), HIBD group(HIBD, n=36) and alpha-lipoic acid-treated group (treated group, n=36).Each group was divided into 3 sub-groups (n=12, per sub-group) based on different time points after HIBD (1 d, 3 d, 7 d).HIBD rat models were established by ligating the left common carotid artery, The sham-operated group and the HIBD group were treated with normal sodium injection intraperitoneally; treated group were treated with alpha-lipoic acid 100 mg/kg every 12 hours in 5 days.Animals were sacrificed at different time points.Changes of brain water content were determined by dry-wet weight method.And the levels of SOD,MDA,GSH-PX were measured.Results HIBD group showed an upward trend in brain water content and the level of MDA after HIBD, were higher than that of sham-operated group at each time point (P〈0.05).Meanwhile, the levels of SOD and GSH-PX showed the downward trend in HIBD group.The levels of brain water content and the level of MDA in treated group were significantly lower than HIBD group at each time point ( P〈0.05 ) .And the levels of SOD and GSH-PX in treated group were significantly higher than HIBD group at 3 d and 7 d.on the contrary , the level of MDA in treated group was significantly lower than HIBD group at 3 d and 7 d.Conclusion Alpha-lipoic acid can amiliorate cerebral edema, so it can prevent HIBD.The neuronal protective mechanism might be reverse oxidative imbalance in the brain of neonatal rats with HIBD.
出处
《中国生化药物杂志》
CAS
2015年第5期44-46,49,共4页
Chinese Journal of Biochemical Pharmaceutics
基金
深圳市科技计划项目(201203328)
深圳市龙岗区科技计划项目(20140609300101)
关键词
ɑ-硫辛酸
缺氧缺血性脑损伤
新生大鼠
脑水肿
氧化应激
alpha-lipoic acid
hypoxic-ischemic brain damage
neonatal rats
cerebral edema
oxidative stress