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时间:2019-01-04
《医学毕业论文葡聚糖硫酸钠致溃疡性结肠炎大鼠模型的建立》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、XX大学毕业论文葡聚糖硫酸钠致溃疡性结肠炎大鼠模型的建立姓名:2014年6月25日作者:赵平,董蕾,罗金燕,马卉,管海涛,商鹤玲【关键词】结肠炎Establishmentofdextransulfatesodiuminducedulcerativecolitismodelinrats[Abstract]AIM:Toestablishtheratmodelofulcerativecolitis(UC).METHODS:Theratswerefirstgiven40g/Ldextransulfatesodium(DSS)indrinkingwaterfor7dandthengi
2、venonlywaterfor10d.Thediseaseactivityindex(DAI)ofalltheratswasevaluateddaily.Theratswerekilledonday&13and18andthelesionscoreandhistologicalscoreofcolonwereevaluated.Segmentsofdistalcolonwereadequatelypreparedfortransmissionelectronmicroscopicobservations.Theweightindexofcecum,colon,thymusa
3、ndspleenwerecalculatedandthemyeloperoxidase(MPO)activityofrectumwasmeasured.RESULTS:Ratsreceiving40g/LDSSsolutionfor7ddevelopeddiarrheaandpositivefecaloccultblood.Inflammationofcolonmainlyinvolvedthemucousmembraneandsubmucosa.Focalerosionsoftheepithelium,gobletcellsdepletion,destructionofc
4、ryptandneutrophilinfiltrationwereobserved.TheincreaseofMPOactivity[(8.84±3.67)nkat/gtissuevs(127.19+27.84)nkat/gtissue,P0.01]andweightofspleen[(3.45±1.00)mg/gvs(5.07±1.31)mg/g,P0.05]wasalsoobserved.AfterreplacingtheDSSsolutionwithwater,thesymptomsandcolonicpathologicalchangesofratsweregrad
5、uallydisappearedandtheMPOactivitysignificantlydecreased(P0.05).CONCLUSION:ThiscolitismodelinratsappearstosharenearlyallthemorphologicalcharacteristicswithhumanUC.【Keywords]diseasemodels,animal;colitis,ulcerative;dextrasulfatesodium【摘要】目的:建立大鼠溃疡性结肠炎(UC)模型.方法:给SD大鼠饮用40g/LDSS溶液7d,然后改正常饮水10d.每
6、日进行疾病活动指数(DAI)评分.于实验&13和18d分别处死4〜5只,行组织学大体评分、组织病理评分及透射电镜观察.计算盲肠、回盲部至肛门段结肠、胸腺、脾脏质量指数并测直肠髓过氧化物酶(MPO)含量.结果:大鼠饮用40g/L的DSS7d均出现腹泻、隐血试验阳性.可见炎症主要累及黏膜和黏膜下层,部分表而上皮脱落,上皮内杯状细胞减少,隐窝破坏,浸润的炎症细胞以屮性粒细胞为主.伴有MPO升高[(&84±3.67)nkat/gvs(127.19±27.84)nkat/g,P0.01]及脾脏增大E(3.45+1.00)mg/gvs(5.07±1.31)mg/g,P0.05]•停药后
7、症状及结肠病变逐渐恢复,MPO活性显著降低(P0.05).结论:此模型病理改变类似人UC.【关键词】疾病模型,动物;结肠炎,溃疡性;葡聚糖硫酸钠0引言溃疡性结肠炎(ulcerativecolitis,UC)在我国的发病率逐渐增高.其确切的病因和发病机制至今尚不完全清楚,缺乏有效的根治方法.因此建立UC动物模型,对研究UC的病因、病理机制及新药开发具有重要意义.葡聚糖硫酸钠(dextransulfatesodium,DSS)诱导的UC动物模型与人类UC的病理形态极为近似,但不同物种及不同浓度DSS所诱导的UC的病变特
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