1 @. n- g& Z k( iExpression of hepatocyte growth factor in lipopolysaccharide stimulated skeletal muscle satellite cells+ C; P e: S& e4 i% g( @
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Abstract I& E9 M* w. O. s) `" @ , k0 S! a! J) C! [7 YAIM: Nowadays the study on human bone marrow mesenchymal stem cells (MSCs) differentiating into endothelial cells is less. This study will isolate and culture human MSCs, then investigate the induced differentiation of vascular endothelial growth factor (VEGF) in vitro through VEGF165 transfection. 2 A' s; w/ l5 Z( k. d# f* r
METHODS: The experiment was conducted from April 2005 to April 2006 at the Key Laboratory of Zoonoses,Ministry of Education,Institute of Zoonoses,Jinlin University. Fresh bone marrow obtained from healthy donor volunteers were isolated and cultured by Percoll gradient centrifugation. The cellular morphology and growth were observed under inverted microscope. When the MSCs reached to approximately confluence, they were passaged and proliferated by monoclonal culture. Immunophenotypes of MSCs were detected by flow cytometry techniques. pcDNA3.0-VEGF165 plasmids were duplicated, amplified and extracted, sublimated in prokaryotic cell of Bacillus coli DH5α. MSCs were transfected by means of lipofectamine media method. Immunophenotypes of cells were detected by flow cytometry techniques after the transfection. Taking the idling plasmid cells group and the non-transfection cells group as the control group, then immunofluorescence staining was employed to accredit the transfection. 8 i" k2 s. A. K& B }8 JRESULTS: After one week of primary culture of MSCs, the hematopoietic cells disappeared, the adherence cells increased and showed on fusiform shape, stretched out gross cell process. After two weeks, MSCs confluenced to monolayer. Fusiform ecphyma became longer. The arrangement of MSCs took on evidently directionality, such as vortex, reticulate and radiat. The immunophenotypes of MSCs were positive for CD44, CD29, but negative for CD34, CD31, CD45. After VEGF165 transfection, the expression of CD44 was drastically decreased and CD31 increased. The immunofluorescence staining was shown that the antibodies to VEGF labeled by FITC made MSCs show green and CD31 labeled by cy3 made MSCs show red.! c3 q. e. c& H2 e6 W
1 t6 w; C% |8 K/ s ^, JCONCLUSION:The immunophenotypes of MSCs transfected by means of lipofectamine media method changed obviously. The expression rate of CD31 increased obviously. The cells took on the character of phenotype of endothelial cells. This expressed that the MSCs had the potency to differentiate into endothelial cells. + y% N' _3 C7 T0 a) u5 p0 ^! q8 q& {. u8 F
Wang PR, Ma XL, Wang XR, Wen JM, Chen BZ, Liu KD.Differentiation-inducing effect of vascular endothelial growth factor on isolation and culture of human bone marrow mesenchymal stem cells.Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu 2007;11(46):9250-9254(China) [www.zglckf.com/zglckf/ejournal/upfiles/07-46/46k-9250(ps).pdf] - {' _+ U/ q7 r, p. k 0 F, w* h \, |* J) u4 x4 {# F, h: S# }. \6 E5 Y" P
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目的:目前有关骨髓间充质干细胞向内皮细胞诱导分化的研究较少。本实验分离和培养人骨髓间充质干细胞,用带有VEGF165的质粒转染人骨髓间充质干细胞,探讨血管内皮生长因子对其体外诱导分化的作用。 2 D3 R6 T1 J* p8 q方法:实验于2005-04/2006-04在吉林大学人兽共患病教育部重点实验室完成。取成人的已排除血液系统肿瘤疾病的新鲜骨髓(自愿提供),采用Percoll梯度分离培养骨髓间充质干细胞,于倒置显微镜下观察细胞形态变化和生长情况。原代细胞培养至增殖接近融合状态时,单克隆培养法分离传代培养,扩增骨髓间充质干细胞。采用流式细胞术检测细胞免疫学表型。在原核细胞大肠杆菌DH5α中复制扩增和提取,纯化、克隆pcDNA3.0-VEGF165质粒。用脂质体转染法转染骨髓间充质干细胞。应用流式细胞术检测诱导后骨髓间充质干细胞免疫学表型变化。并采用免疫荧光染色鉴定转染情况,并设质粒空载和未转染的骨髓间充质干细胞为对照。 & ]1 m' ]+ a( l F: x1 ~& Y& i1 l
结果:人骨髓间充质干细胞原代培养1周后,造血细胞消失,贴壁细胞体积增大,呈现梭形外观,有粗大的细胞突起伸出。2周后细胞融合成单层,梭形突起变长,排列有明显的方向性,细胞排列成旋涡状、网状、辐射状。流式细胞术显示,人骨髓间充质干细胞免疫学表型CD44、CD29阳性,CD34、CD31、CD45阴性。VEGF165诱导骨髓间充质干细胞后CD44表达明显降低,CD31明显升高。免疫荧光染色显示,用FITC标记后的VEGF抗体使细胞显现绿色荧光,用cy3标记的CD31抗体使细胞显现了红色荧光。- p/ H v) Y/ [
结论:转染后的骨髓间充质干细胞细胞表型发生明显转变,CD31表达率明显增高,呈现典型的内皮细胞的表型特征,这说明骨髓间充质干细胞具有向内皮细胞分化的潜能。; n& Z9 g5 j5 U {# ~/ p
关键词:骨髓间充质干细胞;血管内皮生长因子;脑缺血;基因转染0 P1 `& B8 {( T
; D, \. \( [1 `' w4 {王培蕊,马学玲,王心蕊,文佳媚,陈柏竹,刘亢丁.人骨髓间充质干细胞分离培养及血管内皮生长因子对其产生的诱导分化作用[J].中国组织工程研究与临床康复,2007,11(46):9250-9254 [www.zglckf.com/zglckf/ejournal/upfiles/07-46/46k-9250(ps).pdf]5 f* Q. h& U+ k) I+ Y
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