简介：Xenopusorganizerspecificgenenogginpossessesnearlyallthecharacteresticpropertiesoftheactionoforganizertospecifytheembryonicbodyacis.Toanalyzehowthematernalinheritedfactorscontrolitsexpressionpattern,weclonedthe5'regulatoryregionofnoggingene.The1.5kbupstreamsequensecoulddirectreportergenetoexpressinvivoanddatafromdeletionanalysisindicatedthata229basepairfragmetisessentialforactivatingnogginexpression.WefurtherdemonstratedthattheresponseelementswithinthisregulatoryregionwereindeedunderthecontrolofgrowthfactoractivinandWntsignalingpathwaycomponents.

简介：目的研究外源性神经生长因子（NGF]、Noggin转染骨髓间充质干细胞（BMSCs）的可行性,并观察基因修饰的细胞向神经元方向的分化情况.方法采用贴壁法分离纯化BMSCs,通过细胞表面标志及成脂诱导鉴定细胞.Ad-GFP-NGF、Ad-GFP-Noggin单独及联合转染BMSCs.通过Westernblot、免疫细胞化学观察目的蛋白表达.通过免疫组化观察转染后BMSCs向神经元方向分化情况.结果贴壁法获得的细胞具有BMSCs表型,能分化为脂肪细胞.未转染组和Ad-GFP转染组少量表达NGF,不表达Noggin.NGF、Noggin单独及联合转染BMSCs均能高效表达目的蛋白.NGF、Noggin转染的BMSCs可分化为具有神经元形态,并表达神经丝蛋白（NF-H）的细胞,联合转染组NF-H阳性细胞比例最高.结论贴壁法能有效纯化BMSCs,Ad-GFP-NGF、Ad-GFP-Noggin单独及联合转染BMSCs安全并能高效表达目的蛋白,NGF、Noggin转染的BMSCs体外培养能向神经元样细胞方向分化,两种蛋白联合修饰能增强这种分化作用.