维生素E对手机辐射致孕鼠及胎鼠脑组织损伤的干预作用  

Interference of vitamin E on the brain tissue damage by electromagnetic radiation of cell phone in pregnant and fetal rats

作　　者：高娴[1] 罗芮[1] 马斌[1] 王慧[1] 刘天[1] 张静[1] 廉志顺[1] 崔晞[1] 

机构地区：[1]山东大学公共卫生学院卫生检验研究所,济南250012

出　　处：《卫生研究》2013年第4期642-646,共5页Journal of Hygiene Research

摘　　要：目的研究妊娠期补充维生素E对受手机辐射后产生损伤的母鼠及胎鼠脑组织的保护作用。方法 40只清洁级受孕大鼠随机分为5组(阳性对照组,阴性对照组,维生素E低、中、高剂量组)。自妊娠第1天起,维生素E低、中、高剂量组孕鼠分别按5、15和30mg/ml的剂量补充维生素E花生油溶液,阴性对照组和阳性对照组灌服脱维生素E的花生油,同时用辐射频率900MHz手机对阳性对照组和高、中、低剂量组给予1h/次,3次/d的手机辐射处理,连续辐射21d。分娩后取胎鼠右侧海马组织电镜观察胎鼠脑组织中海马区神经细胞损害程度。测定孕鼠及胎鼠脑组织中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性及丙二醛(MDA)的含量。结果与阴性对照组相比,阳性对照组胎鼠脑组织中可见神经元、神经胶质细胞线粒体肿胀,毛细血管周围轻微水肿,核染色质浓缩、边集,血管内皮细胞有空泡形成。中、高剂量组神经细胞和毛细血管异常现象不如阳性对照组的明显。高剂量组神经元可见核染色质均匀,胞质内富含线粒体、粗面内质网和大量的游离核糖体。全部切片未见神经细胞凋亡。在抗氧化酶活性实验中,阳性对照组与阴性对照组相比,母鼠和胎鼠脑组织中SOD、GSH-Px活性明显降低,MDA的含量显著升高,且均有统计学意义(P<0.05)。与阳性对照组相比较,维生素各剂量组的胎鼠脑组织中SOD、GSH-Px的活性均升高,且中、高剂量组MDA含量均降低。高剂量组母鼠脑组织中SOD、GSH-Px的活性明显升高,MDA含量明显降低(P<0.05)。中剂量组母鼠脑组织中SOD的含量较阳性对照组亦有明显升高(P<0.05)。并且随着剂量的增加SOD、GSH-Px的活性具有升高的趋势,MDA含量有下降的趋势。结论在一定的剂量下,维生素E对手机辐射所致胎鼠海马区神经细胞和毛细血管异常具有一定的保护作用,对孕鼠及胎鼠脑组织所产生的�Objective To investigate the interference of vitamin E on brain tissue damage by electromagnetic radiation of cell phone in pregnant and fetal rats.Methods 40 pregnant rats were randomly divided into five groups（positive control,negative control,low,middle and high dosage of vitamin E groups）.The low,middle and high dosage of vitamin E groups were supplemented with 5,15 and 30mg/ml vitamin E respectively since the first day of pregnancy.And the negative control group and the positive control group were given peanut oil without vitamin E.All groups except for the negative control group were exposed to 900MHz intensity of cell phone radiation for one hour each time,three times per day for 21 days.After accouchement,the right hippocampus tissue of fetal rats in each group was taken and observed under electron microscope.The vitality of superoxide dismutase（SOD） and glutathione peroxidase（GSH-Px）,and the content of malondialdehyde（MDA） in pregnant and fetal rats＇ brain tissue were tested.Results Compared with the negative control group,the chondriosomes in neuron and neuroglia of brain tissues was swelling,mild edema was found around the capillary,chromatin was concentrated and collected,and bubbles were formed in vascular endothelial cells（VEC） in the positive fetal rat control group,whereas the above phenomenon was un-conspicuous in the middle and high dosage of vitamin E groups.We can see uniform chromatin,abundant mitochondrion,rough endoplasmic reticulum and free ribosomes in the high dosage group.The apoptosis has not fond in all groups＇ sections.In the antioxidase activity analysis,compared with the negative control group,the vitality of SOD and GSH-Px significantly decreased and the content of MDA significantly increased both in the pregnant and fetal rats positive control group（P〈0.05）.In fetal rats,the vitality of SOD and GSH-Px significantly increased in the brain tissues of all three different vitamin E dosages groups when compared with the positive control group,and the cont

关 键 词：维生素E 手机辐射 超氧化物歧化酶 谷胱甘肽过氧化物酶 丙二醛 

分 类 号：R144.1[医药卫生—公共卫生与预防医学] R14