欢迎来到天天文库
浏览记录
ID:15202339
大小:45.50 KB
页数:15页
时间:2018-08-02
《二 ■ 英对小鼠异位子宫内膜影响的分子机制研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、二■英对小鼠异位子宫内膜影响的分子机制研究【摘要】【目的】探讨四氯二苯并二■英(TCDD)对子宫内膜异位症小鼠模型的影响及其分子学机制。【方法】采用小鼠自体子宫内膜移植法建立小鼠子宫内膜异位症模型,分别给予TCDD0、l、3、10μg/kg剂量灌胃,每21d1次,于建模术后3、6、9周处死,鉴定异位病灶的形成,测量异位病灶体积。采用免疫组化法和RT-PCR法检测各组小鼠异位子宫内膜组织中芳香烃受体(AhR)和细胞色素P4501A1(CYP1A1)表达水平。【结果】①染毒组小鼠异位病灶体积的增加与染毒剂量和时间具有明显的正相关性(r=为0.727、0.553,均P<0.05);②染毒组小
2、鼠异位子宫内膜AhR蛋白较对照组增强(P<0.05);且随染毒剂量增加和染毒时间延长,AhR蛋白表达相应增加(r分别为0.687、0.442,均P<0.01);③随染毒剂量增加,CYP1A1蛋白表达相应增加(r=0.640,P<0.01),对照组未检测到CYP1A1蛋白表达;④染毒组小鼠异位子宫内膜AhRmRNA较对照组增强(P<0.05)。随染毒剂量增加和暴露时间延长,AhRmRNA表达相应增加(r分别为0.565、0.635,P<0.01);⑤随染毒剂量的增加,CYP1A1mRNA表达明显增加(r=0.659,P<0.01),对照组小鼠异位子宫内膜病灶
3、中未检测到CYP1A1mRNA。【结论】TCDD可促进小鼠模型异位子宫内膜病灶的发展,其机制可能与AhR及其下游基因CYP1A1激活有关。AhR及CYP1A1的表达增强是二■英暴露的生化指标。15【关键词】四氯二苯并二■英;子宫内膜异位症;小鼠;AhR;CYP1A1 Abstract:【Objective】Toinvestigatetheeffectof2,3,7,8-tetrachlorodibenzo-p-dioxin(TCDD)ondevelopmentofendometriosisinamousemodelfromperspectiveofmolecularmechanism.【Me
4、thods】Theendometriosismousemodelwasestablishedwithautotransplantationofendometrium.Twenty-onedayspriortoinductionsurgerywhichproducesendometriosis,femalemicewerepretreatedwith2,3,7,8-tetrachlorodibenzo-p-dioxin(TCDD)at0,3,or10mgTCDD/kg.Animalsweretreatedagainatthetimeofsurgeryandat3,6,and9weeksfoll
5、owingsurgery.Evaluationofectopicfocusesdiameterweremadeat3,6,9weekspostsurgery.TheAhRandCYP1A1expressiononectopicendometriumwereidentifiedbyimmunohistochemistryandRT-PCRassays.【Results】①WithincreasedtimeanddoseofTCDDexposure,itproducedadose-dependentincreaseinendometrioticsitediameterwhenalltimepoi
6、ntswerepooledwithineachdoseinmice(r=0.727and0.553respectively,bothP<0.05).②TheexpressionofAhRproteinonectopicfocusesinmicewerehigherintheTCDDexposuregroupthanthoseincontrolgroup,andpresented15time-dosedependentincrease(r=0.687and0.442,bothP<0.01).③Thehigherdoseofexposureincreased,thehigherCYP
7、1A1proteinexpressionsenhanced(r=0.640,P<0.01).④Ascomparedwiththecontrolgroup,theexpressionofAhRmRNAinectopicfocusesofmicewerehigherintheTCDDexposuregroup,andshowtime-dosedependentincrease(r=0.565and0.635
此文档下载收益归作者所有