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ID:33416623
大小:5.06 MB
页数:50页
时间:2019-02-25
《tnf-α增强小鼠骨髓间充质干细胞免疫抑制作用的探讨》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、TNF.仅增强小鼠骨髓问充质干细胞免疫抑制作用的探讨摘要目的:探讨肿瘤坏死因子.Q(TNF.0L)对小鼠骨髓间充质干细胞(bonemarrowstromalceils,BMSCs)免疫抑制作用的影响。方法:采用全骨髓贴壁培养法分离培养小鼠BMSCs,观察其细胞形态学变化;应用流式细胞术鉴定小鼠BMSCs表面标志物CD29、CD34和CD44的表达;应用免疫荧光法检测小鼠BMSCs的CXCR4的表达;通过油红O和阿尔新兰染色分别来鉴定BMSCs成脂和成软骨诱导;Elisa试剂盒检测细胞培养上清液中白介素-10(IL.10)和前列腺素2(PGE2)的表达;通过免疫印迹实验(WestemBlot)检
2、测培养细胞的环氧化物水解酶2(COX.2)和NF一1cB蛋白水平的表达。结果:体外培养的小鼠BMSCs快速贴壁并呈现克隆性生长,集落中心增殖的细胞大多为圆形,边缘细胞呈梭形;流式细胞术鉴定观察到小鼠BMSCs表面标志物CD29阳性表达率为84.89%,CD44阳性表达率为95.77%,而CD34呈阴性表达;免疫荧光检测到CXCR4的阳性表达率达到100%;油红O和阿尔新兰染色后明显看到BMSCs分化为脂肪细胞及软骨细胞;Elisa试剂盒检测25ng/ml和50ng/mlTNF—Q处理组上清液中IL.10的表达水平和对照组相比没有明显的增加,而在100ng/mlTNF.Q刺激时,细胞上清液中IL
3、一10的表达水平较对照组明显增加咖=0.002<0.05),而细胞上清液中PGE2的表达也有相似的结果,在100ng/mlTNF—a刺激时,PGE2(p=O.024、pha(TNF—Q)promotestheimmunosuppressiveeffectofbonemarrowstromaicells(BMSCs)ofmiceviaNF—KBpathwayAbstractlIllllllllllllllllllllJII}llllllPJIIlllllJY2588947Object:Toexploretheimmunosuppressiveeffectoftumornecrosisfactoralpha(TNF一叻actingonbonemarrowstromalcells(BMSCs)ofmice.Methods:BMSCswerecultivatedv5、iawholebonemarrowadherentculturemethodandcellmorphologywasobservedbyinvertedphasecontrastmicroscope;theexpressionofsurfacemarkerofBMSCs,such鹊CD29、CD34andCD44we.redetectedbyflowcytometry,theexpressionofCXCR4Wasdetectedbyimmunofluorescenceassay;thedifferentiationofBMSCswasidentificatedbyoilredOandalci6、anbluestain;levelsoftheIL·10andprostaglandinE2(PGE2)ofcellculturesupematantweredetectedbyElisakits;westernblotwasusedtomeasurecyclo—oxyge—nase一2(cox一2)andnuclearfactorr,BfNF-1出)proteinlevelsofTNF-atreatedanduntreatedBMSCs.Results:BMSCsinvitrowereculturedadherentlyandpresentedinaclonalgrowthmanner.Ce7、llsinthecenterofcolonyWeremostlyball-shaped,whilethose}ontheedgeofcolonywerespindle—shaped.ThepositiveexpressionofCD29was84.89%andCD44was95.77%,whiletheexpressionofCD34Wasnegative.Theexpressionlevelof
4、pha(TNF—Q)promotestheimmunosuppressiveeffectofbonemarrowstromaicells(BMSCs)ofmiceviaNF—KBpathwayAbstractlIllllllllllllllllllllJII}llllllPJIIlllllJY2588947Object:Toexploretheimmunosuppressiveeffectoftumornecrosisfactoralpha(TNF一叻actingonbonemarrowstromalcells(BMSCs)ofmice.Methods:BMSCswerecultivatedv
5、iawholebonemarrowadherentculturemethodandcellmorphologywasobservedbyinvertedphasecontrastmicroscope;theexpressionofsurfacemarkerofBMSCs,such鹊CD29、CD34andCD44we.redetectedbyflowcytometry,theexpressionofCXCR4Wasdetectedbyimmunofluorescenceassay;thedifferentiationofBMSCswasidentificatedbyoilredOandalci
6、anbluestain;levelsoftheIL·10andprostaglandinE2(PGE2)ofcellculturesupematantweredetectedbyElisakits;westernblotwasusedtomeasurecyclo—oxyge—nase一2(cox一2)andnuclearfactorr,BfNF-1出)proteinlevelsofTNF-atreatedanduntreatedBMSCs.Results:BMSCsinvitrowereculturedadherentlyandpresentedinaclonalgrowthmanner.Ce
7、llsinthecenterofcolonyWeremostlyball-shaped,whilethose}ontheedgeofcolonywerespindle—shaped.ThepositiveexpressionofCD29was84.89%andCD44was95.77%,whiletheexpressionofCD34Wasnegative.Theexpressionlevelof
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