牙体牙髓牙周病学杂志
牙體牙髓牙週病學雜誌
아체아수아주병학잡지
CHINESE JOURNAL OF CONSERVATIVE DENTISTRY
2015年
5期
282-287
,共6页
贺莹%关丽娜%孙雪飞%韩冰%张亚庆%杨帆
賀瑩%關麗娜%孫雪飛%韓冰%張亞慶%楊帆
하형%관려나%손설비%한빙%장아경%양범
牙髓干细胞%Oct4%成牙本质细胞分化%可变剪接体
牙髓榦細胞%Oct4%成牙本質細胞分化%可變剪接體
아수간세포%Oct4%성아본질세포분화%가변전접체
dental pulp stem cell%Oct4%odontoblastic induction%alternative splicing variant
目的:研究多能性转录因子Oct4可变剪接体在人牙髓干细胞(hDPSCs)向成牙本质细胞定向分化过程中的表达改变。方法:矿化液诱导hDPSCs向成牙本质细胞分化,RT-PCR检测未经分化诱导、分化诱导7、14 d时Oct4可变剪接体(Oct4A,Oct4B)以及干性分子Sox2、Klf4和DSPP的表达改变;激光共聚焦显微镜(CLSM)检测Oct4A在分化过程中的表达和定位。结果:hDPSCs高表达CD146、CD105、CD90、CD29;CD45及CD34表达阴性。矿化液诱导细胞分化后牙本质涎磷蛋白(DSPP)的总蛋白和mRNA表达阳性。在hDPSCs未经分化诱导、分化诱导7、14 d时,Oct4A和Sox2、Klf4均有表达,分化诱导后表达量明显降低(P<0.05),14 d时hDPSCs表达均低于7 d(P<0.05);Oct4B在hDPSCs未经分化诱导、分化诱导7、14 d 时表达均为阴性, TIP110与Oct4A在hDPSCs成牙本质分化过程中表达趋势相同。未经分化诱导hDPSCs剪接体Oct4A主要表达于细胞核,而分化诱导21 d后主要表达于细胞质。结论:hDPSCs向成牙本质细胞分化过程中伴随着其干性降低、剪接体Oct4A表达降低和核浆穿梭效应的发生,提示Oct4A在维持hDPSCs干性中发挥着一定作用。
目的:研究多能性轉錄因子Oct4可變剪接體在人牙髓榦細胞(hDPSCs)嚮成牙本質細胞定嚮分化過程中的錶達改變。方法:礦化液誘導hDPSCs嚮成牙本質細胞分化,RT-PCR檢測未經分化誘導、分化誘導7、14 d時Oct4可變剪接體(Oct4A,Oct4B)以及榦性分子Sox2、Klf4和DSPP的錶達改變;激光共聚焦顯微鏡(CLSM)檢測Oct4A在分化過程中的錶達和定位。結果:hDPSCs高錶達CD146、CD105、CD90、CD29;CD45及CD34錶達陰性。礦化液誘導細胞分化後牙本質涎燐蛋白(DSPP)的總蛋白和mRNA錶達暘性。在hDPSCs未經分化誘導、分化誘導7、14 d時,Oct4A和Sox2、Klf4均有錶達,分化誘導後錶達量明顯降低(P<0.05),14 d時hDPSCs錶達均低于7 d(P<0.05);Oct4B在hDPSCs未經分化誘導、分化誘導7、14 d 時錶達均為陰性, TIP110與Oct4A在hDPSCs成牙本質分化過程中錶達趨勢相同。未經分化誘導hDPSCs剪接體Oct4A主要錶達于細胞覈,而分化誘導21 d後主要錶達于細胞質。結論:hDPSCs嚮成牙本質細胞分化過程中伴隨著其榦性降低、剪接體Oct4A錶達降低和覈漿穿梭效應的髮生,提示Oct4A在維持hDPSCs榦性中髮揮著一定作用。
목적:연구다능성전록인자Oct4가변전접체재인아수간세포(hDPSCs)향성아본질세포정향분화과정중적표체개변。방법:광화액유도hDPSCs향성아본질세포분화,RT-PCR검측미경분화유도、분화유도7、14 d시Oct4가변전접체(Oct4A,Oct4B)이급간성분자Sox2、Klf4화DSPP적표체개변;격광공취초현미경(CLSM)검측Oct4A재분화과정중적표체화정위。결과:hDPSCs고표체CD146、CD105、CD90、CD29;CD45급CD34표체음성。광화액유도세포분화후아본질연린단백(DSPP)적총단백화mRNA표체양성。재hDPSCs미경분화유도、분화유도7、14 d시,Oct4A화Sox2、Klf4균유표체,분화유도후표체량명현강저(P<0.05),14 d시hDPSCs표체균저우7 d(P<0.05);Oct4B재hDPSCs미경분화유도、분화유도7、14 d 시표체균위음성, TIP110여Oct4A재hDPSCs성아본질분화과정중표체추세상동。미경분화유도hDPSCs전접체Oct4A주요표체우세포핵,이분화유도21 d후주요표체우세포질。결론:hDPSCs향성아본질세포분화과정중반수착기간성강저、전접체Oct4A표체강저화핵장천사효응적발생,제시Oct4A재유지hDPSCs간성중발휘착일정작용。
AIM:To examine the expression of Oct4 isoforms during odontoblastic differentiation of human dental pulp stem cells (hDPSCs).METHODS:hDPSCs were cultured in odontogenic induction medium .Expression of Oct4 isoforms (Oct4A and Oct4B),stem cells markers Sox2,Klf4 and DSPP were detected by RT-PCR.The pro-tein location of Oct4A in hDPSC was detected by confocal laser scanning microscope (CLSM).RESULTS:hDPSCs positively expressed CD146,CD105,CD90 and CD29,but negatively expressed CD45 and CD34.Oct4A isoform and Sox2 and Klf4 were downregulated after odontogenic induction (P<0.05),while Oct4B isoform was not detected be-fore and after induction of hDPSCs.TIP1 10 showed the same dynamic changes with Oct4A during odontoblastic differ-entiation.Moreover,Oct4A was translocated from nuclear to cytoplasm after odontogenic induction.CONCLUSION:The stemness of hDPSC are reduced during odontogenic induction.Downregulation and translocation of spliced variant Oct4A indicates that it may play a role in maintaining stemness of hDPSC.