摘要
目的探讨hPDGF-A/hBD2腺病毒双基因转染大鼠骨髓间充质干细胞(bone marrow mesenchymal stem cells,BMSCs)后,对BMSCs本身生物学特性的影响。方法体外分离培养大鼠BMSCs,应用GFP标记的腺病毒表达载体系统Adv-hPDGF-A-IRES-hBD2,以脂质体法转染293细胞,再以病毒上清液感染BMSCs,对转染目的基因后的BMSCs进行形态学观察,绘制生长曲线,测定其细胞周期以及向成脂、成骨、成肌诱导分化和鉴定。结果hPDGF-A/hBD2双基因成功转入BMSCs后,未发现其对细胞活性有明显作用,基因修饰后的BMSCs仍具有成体干细胞所具备的增殖能力,以及向成脂、成骨、成肌等方向分化的潜能。结论BMSCs是重组腺病毒转染的良好靶细胞,hPDGF-A/hBD2基因修饰的BMSCs仍可作为满意的细胞治疗的种子细胞。
Objective To study the biological characteristics of platelet-derived growth factor A and human beta defensin 2 （hPDGF-A/hBD2） gene-modified rat bone marrow mesenchymal stem eells （BMSCs）. Methods By using liposome transfection technique, recombinant adenovirus vector expressing hPDGF-A/ hBD2 （Adv-hPDGF-A-IRES-hBD2 ） labeled with GFP was transfected into 293T cells for virus packaging and amplification. BMSCs were isolated, cultured and infected by adenovirus-containing supernatant. The exogenous gene-modified BMSCs were comprehensively studied on their biological features, in terms of morphology, cell growth curve, cell cycle, and adipogenic, osteogenic and myogenic differentiation ability. Results hPDGF-A-IRES-hBD2 gene-modified BMSCs did not show obvious changes in cell viability, proliferation, cell cycle distribution or cell differentiation. Conclusion BMSCs were not only good carriers for exogenous hPDGF-A and hBD2 genes but also seed cells for cell therapy even after hPDGF-A/hBD2 modification.
出处
《第三军医大学学报》
CAS
CSCD
北大核心
2008年第6期472-476,共5页
Journal of Third Military Medical University
基金
国家重点基础研究发展规划项目(“973”项目)(2005CB522605)
全军医学科研“十一五”科技攻关项目(06G076)~~
