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ID:21474546
大小:39.50 KB
页数:12页
时间:2018-10-22
《缬草醛对肠易激综合征模型大鼠结肠crf,tph1 mrna及5―ht表达的影响》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、缬草醛对肠易激综合征模型大鼠结肠CRF,TPH1mRNA及5―HT表达的影响 [摘要]该研究旨在通过探讨蜘蛛香环烯醚萜类成分缬草醛对肠易激综合征(IBS)大鼠结肠中促肾上腺皮质激素释放因子(CRF)、色氨酸羟化酶1(TPH1)mRNA表?_及5羟色胺(5HT)含量的影响,阐释缬草醛通过5HT通路治疗IBS的作用机制。将54只SD雄性大鼠随机分为空白对照组、模型组、缬草醛高、中、低剂量组、匹维溴铵组,每组9只。采用孤养结合慢急性不可预见性应激法建立IBS大鼠模型,免疫组化法测定大鼠结肠CRF表达,RTPCR法测定结肠中TPH1mRNA表达,高效液相色谱法测定大鼠结
2、肠中5HT含量。实验结果显示,孤养结合慢急性不可预见性应激可造成大鼠结肠中CRF,TPH1mRNA表达以及5HT含量升高(P<005),缬草醛各剂量组中CRF,TPH1mRNA及5HT含量较模型组明显下降(P<005)。实验结果表明,肠易激综合征能够导致结肠中CRF,TPH1mRNA的表达以及5HT的含量升高,而缬草醛通过降低结肠中CRF,TPH1mRNA的表达以及5HT的含量,而改善胃肠道的相关症状。 [关键词]缬草醛;肠易激综合征;促肾上腺皮质激素释放因子;色氨酸羟化酶1;5羟色胺 EffectsofbaldrinalofValerianajatamans
3、ionexpressionofCRF, TPH1mRNAand5HTinratswithirritablebowelsyndrome TAOSiyu1,XIAOCongrui2,WANGJing2,ZHANGShujing1,GAOYushan1, MUFangyuan1,WANGYicheng1,YANXingli1* (1.SchoolofPreclinicalMedicine,BeijingUniversityofChineseMedicine,Beijing100029,China; 2.SchoolofChineseMateriaMedica,
4、BeijingUniversityofChineseMedicine,Beijing100102,China) [Abstract]ThisstudyaimedtoinvestigatetheeffectsofbaldrinalofValerianajatamansiontheexpressionofcorticotropinreleasingfactor(CRF)andtryptophanhydroxylase1(TPH1)mRNAandlevelsof5hydroxytryptamine(5HT)incolonofratswithirritablebowel
5、syndrome(IBS),andtoexplainitstherapeuticmechanismonIBSthrough5HTpathwayFiftyfourmaleSDratswererandomlydividedinto6groups:blankgroup,modelgroup,baldrinalhigh,mediumandlowdosegroups,andpinaveriumbromidegroup,n=9ineachgroupTheIBSratmodelswereestablishedbyusingunpredictablechronicstressfo
6、r3weeksfollowedby1houracuterestraintstress(CAS)after7daysofrestandindependentfeedingCRFexpressionwasdetectedbyIHCP;TPH1mRNAexpressionwasdetectedbyusingRTPCRandthe5HTlevelwasmeasuredbyhighperformanceliquidchromatography(HPLC)Theresultsindicatedthatthemethodofchronicstresswithacuterestr
7、ainstressmethodandindependentfeedingcouldleadtotheincreaseinexpressionsofCRFandTPH1mRNAandlevelsof5HTinIBSrats(P<005)TheexpressionsofCRF,TPH1mRNAand5HTinbaldrinalgroupsweresignificantlylowerthanthoseinmodelgroup(P<005)TheexperimentalresultsshowedthatIBScouldresultinincreaseintheexpres
8、sions
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