期刊文献+

不同浓度重组人BMP-7促进骨髓间充质干细胞复合组织工程支架材料TCP-COL体外构建组织工程软骨的研究 被引量:3

Different doses of bone morphogenetic proteins-7 promote chondrogenesis of human mesenchymal stem cells in tricalcium phosphate-collagen scaffolds
原文传递
导出
摘要 目的观察比较不同浓度重组人BMP-7对骨髓间充质干细胞复合组织工程支架材料TCP-COL体外构建组织工程软骨的影响。方法用梯度离心法获取人骨髓间充质干细胞(hMSCs),将扩增的第3代hMSCs以1×10~7/ml的细胞浓度接种在支架材料TCP-COL上,分为三组进行培养:对照组(成软骨诱导液培养),BMP-7(50)组(成软骨诱导液基础上加入50ng/ml的BMP-7),BMP-7(100)组(成软骨诱导液基础上加入100ng/ml的BMP-7)。培养2周后进行扫描电镜观察(SEM),苏木素伊红染色(HE),阿尔新蓝染色,Ⅱ型胶原免疫组织化学染色(IHC),荧光定量PCR(RT-PCR),糖胺多糖定量(GAG quantification assay)研究。结果扫描电镜与苏木素伊红染色结果显示细胞在TCP-COL生物支架中分布均匀且紧密粘附在材料表面。阿尔新蓝染色,Ⅱ型胶原免疫组织化学染色,二型胶原(F=76.931,P〈0.05),糖胺多糖(F=63.158,P〈0.05)荧光定量PCR,糖胺多糖定量(F=8.981,P〈0.05)结果显示BMP-7能有效促进人骨髓间充质干细胞复合支架材料TCP-COL体外成软骨,且100mg/ml的浓度应用效果大于50mg/ml。但在COL1基因的表达上,BMP-7(50)组和BMP-7(100)组都显著大于对照组(F=34.823,P〈0.05)。结论 BMP-7能有效促进人骨髓间充质干细胞复合支架材料TCP-COL体外成软骨,且100mg/ml的浓度应用效果大于50mg/ml,但应注意其促进骨质增生的作用。TCP-COL是一种有应用前景的生物支架材料。 Objective To investigate the effects of different doses of bone morphogenetic proteins-7 (BMP-7) on engineered cartilage formation. Methods Human mesenchymal stem cells (hMSCs) were isolated by density gradient centrifugation and then were seeded onto tricalcium phosphate-collagen scaffolds (TCP-COL). hMSCs were cultured on the scaffold for two weeks and divided into three experimental groups: (1) control group: chondrogenic medium (without TGF-β); (2) BMP-7 (50) group: chondrogenic medium (without TGF-β) with 50 ng/ml BMP-7; (3) BMP-7 (100) group: chondrogenic medium(without TGF-β) with 100 ng/ml BMP-7. The effect of BMP-7 on chondrogenesis was assessed by scanning electron microscopy (SEM) observation, hematoxylin-eosin (HE) staining, alcian blue staining, typeⅡ collagen immunohistochemical staining, RT-PCR and GAG quantification assay. Results BMP-7 could significantly induce the chondrogenic differentiation of hMSCs on the TCP-COL scaffold, and the BMP-7 (100) group had better effect than the BMP-7 (50) group (P〈0.05). However, it is noteworthy that in the BMP-7 (50) group and the BMP-7 (100) group, a significant up-regulation of COL1 gene was detected compared with the control group, indicating that when implanted for cartilage repair, BMP-7 might lead to bone formation. Conclusions BMP-7 could significantly induce the chondrogenic differentiation of hMSCs on the TCP-COL scaffold, however, the dose of BMP-7 must be carefully regulated for that BMP-7 might lead to bone formation. TCP-COL scaffolds are potentially usable for cartilage tissue engineering.
出处 《中华关节外科杂志(电子版)》 CAS 2013年第2期48-51,共4页 Chinese Journal of Joint Surgery(Electronic Edition)
基金 国家青年科学基金项目(81201388) 广东省科技厅项目计划(2008B030301042)
关键词 骨形态发生蛋白质类 间质干细胞 组织工程 软骨 Bone morphogenetic proteins Mesenchymal stem cells Tissue engineering Cartilage
  • 相关文献

参考文献2

二级参考文献3

共引文献22

同被引文献54

引证文献3

二级引证文献24

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部