Chinese Journal of Tissue Engineering Research ›› 2017, Vol. 21 ›› Issue (9): 1334-1339.doi: 10.3969/j.issn.2095-4344.2017.09.005
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Zhou Hang-yu, Xia De-lin, Gan Sheng-yuan, Shao Xue-lei
Online:
2017-03-28
Published:
2017-03-31
Contact:
Xia De-lin, M.D., Professor, Department of Oral and Maxllofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
About author:
Zhou Hang-yu, Master, Physician, Department of Oral and Maxllofacial Surgery, Hospital of Stomatology, Southwest Medical University, Luzhou 646000, Sichuan Province, China
Supported by:
the Applied Basic Research Fund of Sichuan Provincial Science and Technology Department, No. 2008jy0014
CLC Number:
Zhou Hang-yu, Xia De-lin, Gan Sheng-yuan, Shao Xue-lei. Ectopic osteogenesis of bone marrow stromal stem cells under bone morphogenetic protein 2/vascular endothelial growth factor 165 co-transfections[J]. Chinese Journal of Tissue Engineering Research, 2017, 21(9): 1334-1339.
2.1 骨髓基质干细胞形态 原代培养第4天就可以观察到细胞附壁,呈梭形,数量较多,局部呈多个散在分布的细胞集落(图1A)。第4-6天开始形成典型的均匀分布的簇状增殖灶,细胞数量增多,细胞呈长梭形,细胞紧密排列。第6天后细胞数量迅速扩增,细胞簇状增生灶数量增加,范围扩大。第7-9天细胞生长即可以达80%-90%融合,呈长梭形,紧密排列类似漩涡状。 传代细胞接种4 h后开始附壁铺伸,12 h活细胞基本完成贴壁,第3天迅速增殖,第7天即可达到80%-90%融合,呈现比原代更均匀的长梭形(图1B)。经成骨诱导7 d后,细胞逐渐汇合,呈现铺路石状。随着诱导时间的延长,局部细胞呈重叠生长,间充质逐渐堆积,间充质中矿盐沉积,形成多个结节,并逐渐融合。培养14 d后,可见褐色点状矿化结节中心。 组间差异:未转染组、空载质粒组、VEGF165单基因转染组,在培养期间一直观察不到成骨细胞特征(图1C,D)。BMP2单基因转染组、BMP2和VEGF165双基因共转染组,均能观察到骨髓基质干细胞向成骨细胞分化,且BMP2和VEGF165双基因共同转染组(图1F)的骨髓基质干细胞分化速度和强度均大于BMP2单基因转染组(图1E)。 2.2 Western Blot检测细胞中BMP2和VEGF165的表达 在BMP2和VEGF165双基因共转染组和BMP2单基因转染组中有大量的BMP2分泌位于上清中,见图2。在未转染组、VEGF165单基因转染组和空载质粒组中则只有很少。在BMP2和VEGF165双基因共转染组和VEGF165单基因转染组中有大量的VEGF165分泌于上清中,在未转染组、BMP2单基因转染组和空载质粒组中VEGF165分泌量很少。统计结果显示双基因共转染组和单基因转染组差异有显著性意义(P < 0.05),见表1。"
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