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ID:33699975
大小:4.08 MB
页数:45页
时间:2019-02-28
《wnt%2fβ-catenin信号通路在bmscs向神经样细胞分化中作用》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、摘要目的:探讨应用EGF、bFGF诱导BMSCs向神经样细胞分化的的可行性,并进一步研究wnt/[3.-eatenin信号通路在BMSCs向神经样细胞分化中的作用。方法:取4周龄大健康清洁级SD大鼠骨髓,采用全骨髓贴壁法体外培养BMSCs,.流式细胞仪检测P3代细胞表面的骨髓基质标志CD,90和造血细胞标志CD4:5。取P3代细胞,根据诱导条件不同分为4组:空白对照组(1%胎牛血清:+DMEMfF一12)、EGF组(20ng/mlEGF+1%胎牛血清+DMEM/F.12)、bFGF组.(20ng/mlbFGF+1%.胎牛血清:+DMElWF一12)、EGF+
2、bFGF组(20ng/mlEGF+20ng/mlbFQF+1%.眙牛血清+DMEM/F.12),倒置相差显微镜观察细胞形态变化,诱导7天后,采用免疫细胞化学法和Westernblot检测神经细胞标志蛋白NSE、GFAP的表达,RT-PCR检测NSE、GFAP、nestin、[3-catenin、BDNF、GDNF基因mRNA的变化。结果:P3代BMSCs大致呈单一的长梭形或扁平形,紧密漩涡样排列生长,流式细胞仪示CD90表达高达98.95%,而CD,15表达仅1.28%;诱导7天后bFGF和EGF+bFGF组细胞收缩变圆,向四周伸出多个明显突起,部分突起问存
3、在连接,表现出典型的神经元样细胞形态,而EGF组、空白组变化不明显;免疫细胞染色示EGF组GFAP阳性率高于NSE,而bFGF和EGF+bFGF组NSE阳性率高于GFAP;EGF+bFGF组NSE、GFAP阳性率最高,bFGF组次之,与空白对照组、EGF组比较差异均有统计学意义(p4、F组显著增高,EGF组低于空白组,差异均有统计学意义(p5、n信号通路;骨髓间充质干细胞;神经样细胞;分化IIAbstractABSTRACTObjeetive:T0investgatethefeasibilityofBMSCsdifferentiateintoneuron-likecellsinducedbyEGF、bFGFinvitro,andfurtherstudytheroleofWnt/13一cateninsignalingpathwayinthedifferentiation,Methods:BMSCswereharvestedfrom4-week-oldSpragueDawleyrats.Flowcyt6、ometryassaythemarrowstromalsurfacemarkerCDgoandhematopoieticeellmarkerCD45ofBMSCsatpassage3.BMSCsatpassage3weredividedinto4groupsaccordingdifferentculturecondition:controlblankgroup(1%fetalbovineserum+DMEM/F一12)、groupEGF(20ng/mlEOF+1%fetalbovineserum+DMEM/F-12)、groupbFGF(20ng/mlbFG7、F+1%fetalbovineserum+DMEM/F-12)、groupEGF+bFGF(20ng/miEGF+20ng/mlbFGF+1%fetalbovineserum+DMEM/F-12),Thenthecellularmorphologywasobservedunderinvertedphasecontrastmicroscope.At7daysafterinduction,ImmunohistochemicalstainingandWesternblotwasusedtodetectneuronspecificenolasefNSE)andcol8、lagenfibreacidicprotein(GF
4、F组显著增高,EGF组低于空白组,差异均有统计学意义(p5、n信号通路;骨髓间充质干细胞;神经样细胞;分化IIAbstractABSTRACTObjeetive:T0investgatethefeasibilityofBMSCsdifferentiateintoneuron-likecellsinducedbyEGF、bFGFinvitro,andfurtherstudytheroleofWnt/13一cateninsignalingpathwayinthedifferentiation,Methods:BMSCswereharvestedfrom4-week-oldSpragueDawleyrats.Flowcyt6、ometryassaythemarrowstromalsurfacemarkerCDgoandhematopoieticeellmarkerCD45ofBMSCsatpassage3.BMSCsatpassage3weredividedinto4groupsaccordingdifferentculturecondition:controlblankgroup(1%fetalbovineserum+DMEM/F一12)、groupEGF(20ng/mlEOF+1%fetalbovineserum+DMEM/F-12)、groupbFGF(20ng/mlbFG7、F+1%fetalbovineserum+DMEM/F-12)、groupEGF+bFGF(20ng/miEGF+20ng/mlbFGF+1%fetalbovineserum+DMEM/F-12),Thenthecellularmorphologywasobservedunderinvertedphasecontrastmicroscope.At7daysafterinduction,ImmunohistochemicalstainingandWesternblotwasusedtodetectneuronspecificenolasefNSE)andcol8、lagenfibreacidicprotein(GF
5、n信号通路;骨髓间充质干细胞;神经样细胞;分化IIAbstractABSTRACTObjeetive:T0investgatethefeasibilityofBMSCsdifferentiateintoneuron-likecellsinducedbyEGF、bFGFinvitro,andfurtherstudytheroleofWnt/13一cateninsignalingpathwayinthedifferentiation,Methods:BMSCswereharvestedfrom4-week-oldSpragueDawleyrats.Flowcyt
6、ometryassaythemarrowstromalsurfacemarkerCDgoandhematopoieticeellmarkerCD45ofBMSCsatpassage3.BMSCsatpassage3weredividedinto4groupsaccordingdifferentculturecondition:controlblankgroup(1%fetalbovineserum+DMEM/F一12)、groupEGF(20ng/mlEOF+1%fetalbovineserum+DMEM/F-12)、groupbFGF(20ng/mlbFG
7、F+1%fetalbovineserum+DMEM/F-12)、groupEGF+bFGF(20ng/miEGF+20ng/mlbFGF+1%fetalbovineserum+DMEM/F-12),Thenthecellularmorphologywasobservedunderinvertedphasecontrastmicroscope.At7daysafterinduction,ImmunohistochemicalstainingandWesternblotwasusedtodetectneuronspecificenolasefNSE)andcol
8、lagenfibreacidicprotein(GF
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