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邻苯二甲酸二辛酯和氯仿联合染毒对小鼠脑组织的影响

发布时间:2018-07-04 21:04

  本文选题:邻苯二甲酸二辛酯 + 氯仿 ; 参考:《吉林大学》2013年硕士论文


【摘要】:目的: 邻苯二甲酸二辛酯(DOP)作为增塑剂和添加剂等被广泛应用于塑料、农药、橡胶和化妆品等生产领域,由于其极易进入到环境当中且具有环境雌激素样作用,可对环境和人体产生影响。氯仿作为氯化消毒的重要副产物,对人体同样有害,但目前对于二者的联合毒作用的报道较少。本实验用DOP和氯仿同时对小鼠进行染毒,观察其体重的变化,脑脏器系数,脑的脂质过氧化作用,脑组织酶活性以及对脑细胞的钙离子浓度、线粒体膜电位的影响,来研究二者同时作用时对脑组织的损伤作用以及联合毒性。 方法: 本实验采用联合作用的分析方法—2×2析因分析进行实验设计分组。实验设计包括DOP和氯仿两个影响因素,均有暴露和未暴露两个水平,分为不染毒的对照组、只暴露DOP染毒组、只暴露氯仿染毒组和同时暴露DOP和氯仿染毒组四种组合方式。 各组小鼠采用灌胃法染毒,随机分为对照组(玉米油)、DOP单独染毒组(1/10LD_(50),540mg/kg)、CF单独染毒组(1/10LD_(50),112mg/kg)和DOP(1/10LD_(50),540mg/kg)+CF(1/10LD_(50),112mg/kg)联合染毒组,雌雄各半,每组10只,各组均以玉米油作为溶剂。每天一次,连续染毒15天后处死小鼠,测定脑组织脏器系数、脑中神经递质、脑的脂质过氧化指标、脑组织酶、脑中钙离子浓度、线粒体膜电位。 结果: 1、DOP和氯仿联合染毒对小鼠体重的影响 灌胃染毒15天后,雌性小鼠DOP染毒组体重高于对照组(P0.05),联合组存在交互作用(P0.05);雄性小鼠氯仿组的体重低于对照组(P0.05)。 2、DOP和氯仿联合染毒对小鼠脑脂质过氧化作用的影响 雌性小鼠DOP组脑组织中CAT的活力高于对照组(P0.05),联合组存在交互作用(P0.05);雄性小鼠联合组脑组织中CAT的活力存在交互作用(P0.05),氯仿组MDA含量高于对照组(P0.05),且联合组存在交互作用(P0.05)。 3、DOP和氯仿联合染毒对小鼠脑神经递质的影响 雌性小鼠脑中DOP组和氯仿组的5-HT、NE含量均低于对照组(P0.05),联合染毒组均存在交互作用(P0.05);氯仿组DA含量低于对照组(P0.05),联合染毒组存在交互作用(P0.05)。雄性小鼠DOP组的5-HT含量高于对照组(P0.05),氯仿组低于对照组(P0.05);联合染毒组NE含量存在交互作用(P0.05);DOP组与氯仿组DA含量均高于对照组(P0.05),联合染毒组存在交互作用(P0.05)。DOP和氯仿联合染毒对小鼠脑神经递质的影响除5-HT对照组外均存在性别差异(P0.05)。 4、DOP和氯仿联合染毒对小鼠脑Na~+-K~+-ATP酶与Ca~(2+)-Mg~(2+)-ATP酶的影响 雌性小鼠DOP组和氯仿组两种酶的活力均高于对照组(P0.05),联合组的Ca~(2+)-Mg~(2+)-ATP酶存在交互作用(P0.05);雄性小鼠氯仿组两种酶的活力均高于对照组(P0.05),并且联合组都存在交互作用(P0.05)。 5、DOP和氯仿联合染毒对小鼠脑LDH、、SDH、NOS、NO的影响 雌性小鼠氯仿组的LDH活性和SDH活性均高于对照组(P0.05),且联合暴露组均存在交互作用(P0.05);DOP组的NO值低于对照组(P0.05),,联合染毒组存在交互作用(P0.05)。雄性小鼠DOP组的LDH活性和SDH活性均低于对照组(P0.05),DOP组和氯仿组都存在交互作用(P0.05);氯仿组NOS活性高于对照组(P0.05);DOP组的NO值低于对照组(P0.05)。 6、DOP和氯仿联合染毒对小鼠脑线粒体膜电位与钙离子浓度的影响 雌性小鼠DOP组和氯仿组的Ca~(2+)浓度低于对照组(P0.05),线粒体膜电位高于对照组(P0.05),联合染毒组的Ca~(2+)浓度存在交互作用(P0.05);雄性氯仿组的线粒体膜电位高于对照组(P0.05),联合暴露组存在交互作用(P0.05)。 结论: 1、同时接触DOP和氯仿可以引起雌性小鼠CAT活性升高,雄性小鼠CAT活性降低,MDA含量升高。 2、雄性小鼠脑内5-HT、NE、DA的含量升高,雌性降低,对神经递质的作用在雌雄之间存在一定的性别差异。 3、雌性小鼠脑中LDH、SDH、NOS、NO、Ca~(2+)-Mg~(2+)-ATP酶的活力或含量均升高,雄性小鼠脑中LDH、SDH活性降低,Na~+-K~+-ATP酶与Ca~(2+)-Mg~(2+)-ATP酶活力升高。 4、雌性小鼠钙离子浓度降低,雄雄小鼠线粒体膜电位升高。 5、DOP和氯仿联合染毒对小鼠脑组织可产生交互作用。
[Abstract]:Purpose :

Dioctyl phthalate ( DOP ) is widely used as plasticizer and additive in the fields of plastics , pesticides , rubber and cosmetics . Because of its easy entry into the environment and has environmental estrogen - like effect , it can influence the environment and human body . Chloroform can be used as an important by - product for chlorination and disinfection , and it is harmful to human body . However , the effect of its body weight , brain organ coefficient , lipid peroxidation of brain , brain tissue enzyme activity and the effect of calcium ion concentration and mitochondrial membrane potential on brain cells are studied .

Method :

The experimental design consisted of two influencing factors : DOP and chloroform , both of which were exposed to and unexposed to two levels , divided into non - toxic control group , exposure to DOP staining group , exposure to chloroform staining group and exposure to four combinations of DOP and chloroform .

The rats were randomly divided into control group ( corn oil ) , DOP alone ( 1 / 10LD _ ( 50 ) , 540mg / kg ) , CF alone ( 1 / 10LD _ ( 50 ) , 112mg / kg ) and DOP ( 1 / 10LD _ ( 50 ) , 540mg / kg ) + CF ( 1 / 10LD _ ( 50 ) , 112mg / kg ) .

Results :

Effect of Combination of 1 , DOP and Chloroform on Weight of Mice

The weight of DOP in female mice was higher than that of control group ( P0.05 ) .
The weight of chloroform in male mice was lower than that of control group ( P0.05 ) .

Effects of combination of 2 , DOP and chloroform on lipid peroxidation in brain of mice

The activity of CAT in the brain tissue of female mice was higher than that in the control group ( P0.05 ) .
The activity of CAT in the brain tissue of male mice was higher than that in the control group ( P0.05 ) , and the content of MDA in chloroform group was higher than that in the control group ( P0.05 ) .

Effects of Combination of 3 銆

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