资源描述:
《三七总皂苷对泡沫细胞内ABCA1和LXRαmRNA表达的影响》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、三七总皂苷对泡沫细胞内ABCA1和LXRαmRNA表达的影响基金项目:国家自然科学基金(30470465,30371768,30672641)SupportedbytheNationalNaturalScienceFoundationofChina(30470465,30371768,30672641)作者简介:李卓莹,女,四川省资中县人,硕士研究生,助教,主要从事动脉粥样硬化发病机制及药物干预方面的研究。电话:(023)68753397-83,E-mail:li_zhuoying@hotmail.com通信作者:李晓辉,E-mail:lpsh008@yahoo.com.cn收稿日期:
2、2008-10-20;修回日期:2008-11-05李卓莹,何雪峰,张海港,贾乙,李晓辉(第三军医大学药学院新药研究中心,重庆,400038)摘要:目的观察三七总皂苷(panaxnotoginsengsaponins,PNS)对泡沫细胞ABCA1和LXRαmRNA表达及脂质沉积的影响。方法提取SD大鼠腹腔巨噬细胞纯化后,与高、中、低剂量PNS(80、40、20μg/ml)及氧化低密度脂蛋白共孵育48h。油红O染色观察细胞内脂质堆积情况,酶法测定细胞内总胆固醇(TC)、游离胆固醇(FC)、胆固醇酯(CE)的含量并计算CE/TC值。采用RT-PCR检测泡沫细胞ABCA1和LXRαmRNA表
3、达情况。结果模型组细胞中TC、FC、CE及CE/TC值均显著高于对照组(P<0.05);与模型组相比,PNS高、中剂量组细胞内TC、FC、CE及CE/TC均显著降低(P<0.05)。PNS高、中剂量组中ABCA1及LXRαmRNA的表达均显著高于模型组(P<0.01)。结论PNS可以上调ABCA1和LXRαmRNA表达并减少巨噬细胞源性泡沫细胞中脂质沉积。关键词:三七总皂苷;泡沫细胞;ABCA1;LXRα中图法分类号:文献标识码:AEffectsofPanaxnotoginsengsaponinsonmRNAexpressionsofABCA1andLXRαinfoamcellsLIZ
4、huo-ying,HEXue-feng,ZHANGHai-gang,JIAYi,LIXiao-hui(ResearchCenterofNewDrugs,CollegeofPharmacy,ThirdMilitaryMedicalUniversity,Chongqing400038,China)Abstract:ObjectiveToobservetheeffectsofPanaxnotoginsengsaponins(PNS)onmRNAexpressionsofABCA1andLXRαandlipiddepositioninfoamcells.MethodsPeritonealmac
5、rophagesobtainedfromSDratsafterpurificationwereincubatedwithox-LDLfor48htoestablishfoamcellmodel.PNS(20,40,80μg/ml,respectively)weregivenforintervention.Thecellularlipidaccumulationwasexaminedbyoilredstaining.Thecellularcontentsoftotalcholesterol(TC),freecholesterol(FC)andcholesterolester(CE)and
6、theratioofCE/TCweredetectedbyenzymicmethods.ThemRNAlevelsofABCA1andLXRαweredeterminedbyRT-PCR.ResultsThecontentsofTC,FC,CEandCE/TCratioinmodelgroupweresignificantlyincreasedcomparedwithcontrolgroup(P<0.05).Comparedwithmodelgroup,40,80μg/mlPNSreducedthecontentsofTC,FC,CEandCE/TCratioremarkably(P<
7、0.05)andincreasedABCA1andLXRαmRNAexpressionssignificantly(P<0.01).ConclusionPNSreduceslipiddepositionandupregulatesABCA1andLXRαmRNAexpressionsinfoamcells.Keywords:Panaxnotoginsengsaponins;foamcell;ABCA1;LXRα动脉粥样硬化(atheroscle