摘要
为探讨碱性成纤维细胞生长因子 (b FGF)基因转染对间充质干细胞 (MSCs)增殖、定向分化等生物学行为的调控作用 ,本文将体外具有促进 MSCs增殖分化及毛细血管增殖等多重生物学效应的 b FGF基因转入骨组织工程首选种子细胞—— MSCs,通过免疫组化 SABC法检测其瞬时与稳定表达 ,并检测转基因细胞增殖活力及碱性磷酸酶 (AL P)与骨钙素 (OC)合成情况。结果表明 ,b FGF基因能被转入 MSCs并得到稳定表达 ,转基因细胞增殖与OC合成明显增强 ,AL P活性无明显变化。因此 ,转基因 MSCs可使 b FGF持续高效发挥作用 ,克服了使用外源性b FGF半衰期短 ,需反复大剂量给药的缺点 ;b FGF基因转染可促进 MSCs增殖并调控其定向分化 ,使其获得良好的生物学活性 ;从而为把组织工程学与分子生物学有机结合 ,用分子组织工程学技术高质量地修复骨缺损奠定了良好的基础。
To investigate the effect of basic fibroblast growth factor(bFGF) gene transfection on the proliferation and differentiation of mesenchymal stem cells (MSCs) and to provide basis for accelerating bone defect repairing using gene-enhanced tissue engineering technology, Rabbit periosteum-derived MSCs were transfected with the full-length rat bFGF cDNA in vitro. The transient and stable gene expression of bFGF were determined by immunohistochemistry. The proliferativity and the synthesis alkaline phosphatase (ALP) and osteocalcin(OC) of the transfected MSCs were also examined. The results showed that bFGF cDNA could be transferred into osteoblasts and expressed stably at least 4 weeks. The proliferation and OC content of genetically modified MSCs were increased significantlly, whereas the ALP activity remained no change. In conclusion, transfer of gene encoding bFGF to MSCs increases its proliferation and osteogenesis perporty. Based on the successful conjunction of the existing techniques of tissue engineering with the novel possibilities offered by modern gene transfer technology, an innovative concept, molecular tissue engineering, was put forward for the first time. As a new branch of tissue engineering, it represents both a new area and an important trend in tissue engineering research.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
2003年第3期443-446,共4页
Journal of Biomedical Engineering
基金
国家自然科学基金面上资助项目 (3 0 170 2 70 )
国家自然科学基金青年资助项目 (3 0 2 0 0 0 63 )
关键词
碱性成纤维细胞生长因子
基因转染
间充质干细胞
生物学行为
调控
骨缺损
组织工程
Bone defect repairing Tissue engineering Gene transfer Molecular tissue engineering Basic fibroblast growth factor Mesenchymal stem cells
