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1、分類號:R459.6密級:不保密UDC:610學校代碼:11065碩士學位論文低聚木糖對應激大鼠腸粘膜屏障功能的影響劉均杰指導教師丁連安教授學科專業(yè)名稱外科學(普外)論文答辯日期2015年5月26日摘要目的研究大鼠飲食中添加低聚木糖對電刺激-束縛應激大鼠腸屏障功能的影響。方法40只Wistar大鼠隨機分成正常對照組、低聚木糖組、應激組和低聚木糖+應激組,每組10只,正常對照組僅給予基礎飲食,低聚木糖組每天以2g/kg的劑量灌胃補充低聚木糖;應激組大鼠于普通飲食喂養(yǎng)第12天,被束縛固定后每天給予電刺激束縛3h,持續(xù)2周,制備應激模型
2、;低聚木糖+應激組在每天給予低聚木糖(2g/L)喂養(yǎng)同時,于第12天制備應激模型。建模成功后,各組大鼠經(jīng)腹主動脈采血,檢測血清D-乳酸、二胺氧化酶(DAO)濃度;處死大鼠,取回腸組織行病理檢查并測定腸粘膜形態(tài)學參數(shù)及腸液SIgA含量。結(jié)果與對照組相比,應激組及低聚木糖+應激組血漿D-乳酸、DAO濃度均明顯增高(P<0.05)并呈正相關;應激組血漿D-乳酸、DAO濃度又明顯高于低聚木糖+應激組(p<0.05);對照組與低聚木糖組間血清學指標的差異無統(tǒng)計學意義(p>0.05);應激組及低聚木糖+應激組大鼠腸粘膜形態(tài)學參數(shù)數(shù)值和腸液SI
3、gA含量均較正常對照組顯著降低(p<0.05),應激組又明顯低于低聚木糖+應激組(p<0.05),而低聚木糖組顯著高于對照組(p<0.05)。結(jié)論添加低聚木糖喂養(yǎng)可以降低大鼠血漿D-乳酸、二胺氧化酶濃度,改善腸粘膜形態(tài)及功能,提示低聚木糖在一定程度上具有維護腸粘膜屏障功能的作用。碩士研究生:劉均杰(普通外科學)指導教師:丁連安教授關鍵詞:應激;腸粘膜屏障;D-乳酸;二胺氧化酶;低聚木糖AbstractObjective:Tostudytheeffectofthexylo—oligosaccharide(XOS)addedinthe
4、dietontheinjuredintestinalmucousmembranebarriercausedbyelectricityrestraintstress.Methods:Fortywistarratswererandomlydividedintogroups:twoelectricresistantstress(ERS)groupsfedwitheitheranormaldiet(ERSgroup)or2g/kgXOSperday(ERS+XOSgroup)andtwoshamERSgroupsfedwithanorma
5、ldiet(controlgroup)or2g/kgXOSperday(XOSgroup).Allthefourgroupswerefedforatotalof26days,andtheERSandERS+XOSgroupsweresubjectedtoelectricrestraintstressstartingfromthe12thday,for2weeks.Thenthebloodsamplesofallthefourgroupswerecollectedviaabdominalaortapuncturefordetermi
6、nationofserumD-lactateanddiamineoxidas(DAO)activity;finallyalltheratsweresacrificedandtheintestinaltissueswerecollectedforexaminationofpathologicaltissue,membranemorphologyandSIgAcontents.Results:Comparedwiththecontrol,theserumD-lactateandDAOlevelsofERSgroupandtheERS+
7、XOSgroupweresignificantlyincreasedandpositivelycorrelated(p<0.05);andthatintheERSgroupwassignificantlyhigherthanthatintheERS+XOSgroup(p<0.05);thelevelsofserumD-lactateandDAOwerenotsignificantlydifferentbetweenthecontrolandtheXOSgroups(p>0.05).Theparametervaluesofintes
8、tinalmembranemorphologyandSIgAcontentsoftheERSgroupandERS+XOSgroupwereobviouslydeclinedbycomparisonwiththecontrolgroup(p<0.0