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1、中國修復重建外科雜志2013年5月第27卷第5期·559·人孤雌胚胎干細胞無飼養(yǎng)層培養(yǎng)體系的建立梁銳王志強陳天星朱靜朱妹李英楊龍朱寶生【摘要】目的建立一種安全、有效、經(jīng)濟且適于人孤雌胚胎干細胞(humanparthenogeneticembryonicstemcells,hPESCs)體外培養(yǎng)的無飼養(yǎng)層培養(yǎng)體系。方法將常規(guī)體外培養(yǎng)的hPESCs分別以mTeSRr”1培養(yǎng)基(對照組)和人包皮成纖維細胞的條件培養(yǎng)基(humanforeskinfibrobtasts.conditionalmedium,hFFs.CM)(實驗組)擴增培養(yǎng),倒置顯微鏡下觀察
2、兩組無飼養(yǎng)層培養(yǎng)體系下hPESCs的生長狀態(tài);采用ALP檢測和核型分析研究hPESCs生物學特性;采用RT-PCR檢測hPESCs全能性標記物Oct.4的表達情況;通過體外和體內分化實驗觀察hPESCs向3個胚層分化的潛能。結果兩組hPESCs形態(tài)規(guī)則、不易分化,在形態(tài)、擴增速度等方面無明顯差異;已成功在體外培養(yǎng)l5代,兩組均能保持正常女性的二倍體核型46,XX和全能性;RT-PCR檢測示兩組Oct.4mRNA均呈陽性表達;體外分化均可形成擬胚體;在裸鼠體內均可形成含有3個胚層組織成分的畸胎瘤。結論hFFs.CM無飼養(yǎng)層培養(yǎng)體系可長期支持hPESC
3、s的生長并維持其未分化狀態(tài),成功建立了一種不僅能維持hPESCs的有效擴增、減少動物源性污染、降低培養(yǎng)成本,還可滿足l臨床大規(guī)模應用的hPESCs無飼養(yǎng)層培養(yǎng)體系?!娟P鍵詞】人孤雌胚胎干細胞無飼養(yǎng)層條件培養(yǎng)基人包皮成纖維細胞ESTABLISHMENTOFFEEDER.FREECUL.TURESYSTEM0FHUMANPARTHENOGENETICEMBRYONICSTEMCELLS/LIANGRui,WANGZhiqiange,CHENTianxingd,ZHUJing~,ZHUShu,LIYing~,YANGLo,ZHUBaoshen~.Depa
4、rtmentofPathology,GeneticDiagnosisCente~theFirstPeople’sHospitalofYunnanProvince,KunmingYunnan,650032,P.R.China;DepartmentofOncology,砌BFirstAfiliatedHospitalofKunmingMedicalUniversity.Correspondingauthor:WANGZhiqiang,E—mail:wzqcy2000@126.com【Abstract】ObjectiveToestablishasafe,
5、effective,andeconomicfeeder—freeculturesystemwhichissuitableforthecultureofhumanparthenogeneticembryonicstemcells(hPESCs)nvitro.MethodshPESCswereculturedwithmTeSR1medium(controlgroup)andhumanforeskinfibroblasts—conditionalmedium(hFFs—CM)(experimentalgroup).ThegrowthstatusofhPE
6、SCsinbothfeeder—freeculturesystemswereobservedwithinvertedmicroscope.Alkalinephosphatase(ALP)analysisandkaryotypeanalysiswereusedtostudythebiologicalcharacteristicsofhPESCs.TheexpressionofhPESCspluripotentmarkerOct一4wasanalyzedbyRT—PCR.Differentiationexperimentinvivoandinvitro
7、wasappliedtoobservethedifferentiationpotentialofhPESCsintothreegermlayers.ResultshPESCshadregularmorphologywithdificultyindifferentiationinbothculturesystems.NoobviousdifferencewasobservedinmorphologyandexpansionspeedofhPESCsbetween2groups.Aftersubculturedfor15passagesinvitro,
8、hPESCsin2groupscouldmaintainnormalfemalediploidkaryotype46,XX