摘要
背景:骨髓间充质干细胞是组织修复的理想细胞,能否提高其体外增殖的能力是促进组织修复的关键因素。目的:观察转化生长因子β1对骨髓间充质干细胞体外增殖的影响。方法:兔耳中央动脉抽血,离心制备富血小板纤维蛋白,置于新鲜的DMEM培养液中,分别于37℃下静置7,14,21,28 d,收集富血小板纤维蛋白析出液,检测析出液中转化生长因子β1质量浓度。抽取兔骨髓进行体外培养骨髓间充质干细胞,将收集的富血小板纤维蛋白析出液配制成条件培养液作用于骨髓间充质干细胞,观察其对骨髓间充质干细胞增殖的影响。结果与结论:转化生长因子β1质量浓度随着时间的递增而增高,21-28 d是质量浓度增长最快阶段,在28 d时达到高峰;同一刺激浓度下,骨髓间充质干细胞增殖在0至1 d降低,1至2 d明显升高,2至3 d为平缓期,骨髓间充质干细胞增殖速度最快的是150 ng/L组。实验证实了富血小板纤维蛋白析出液中转化生长因子β1的质量浓度随着时间的增加而增高,含有不同质量浓度转化生长因子β1的条件培养基对骨髓间充质干细胞增殖起到不同的促进作用,骨髓间充质干细胞在含有质量浓度为150 ng/L转化生长因子β1的条件培养基中培养两三天时,增殖速度为最快。
BACKGROUND：Bone marrow mesenchymal stem cel s are the ideal cel s for tissue repair. Whether the ability of in vitro proliferation can be enhanced is a key factor to promote tissue repair. OBJECTIVE：To observe the effect of transforming growth factorβ1 on the proliferation of bone marrow mesenchymal stem cel s in vitro. METHODS：Blood samples were taken from the central artery of rabbits to prepare platelet-rich fibrin by centrifugation method which was then placed into fresh DMEM at 37℃for 7, 14, 21, 28 days to col ect exudates. The mass concentrations of transforming growth factor-β1 in the exudates of platelet-rich fibrin were detected. Rabbit bone marrow mesenchymal stem cel s were col ected and cultured in the conditioned medium made by the exudates of platelet-rich fibrin, and the proliferation of cel s was observed. 〈br〉 RESULTS AND CONCLUSION：Concentration of transforming growth factorβ1 was increased with time increasing, increased fastest at 21-28 days, and peaked at 28 days. Under the same stimulus concentration, the proliferation of bone marrow mesenchymal stem cel s was reduced at 0-1 day, increased obviously at 1-2 days, and entered into a steady phase at 2-3 days. Under 150 ng/L transforming growth factorβ1, bone marrow mesenchymal stem cel s proliferated fastest. Experimental findings indicate that with the increase of time, the concentration of transforming growth factorβ1 in the exudates of platelet-rich fibrin increase gradual y, and the conditioned media containing different concentrations of transforming growth factorβ1 play different roles in promoting the proliferation of bone marrow mesenchymal stem cel s. Bone marrow mesenchymal stem cel s cultured in the conditioned medium containing 150 ng/L transforming growth factorβ1 for 2-3 days can proliferate fastest.
出处
《中国组织工程研究》
CAS
CSCD
2014年第45期7233-7238,共6页
Chinese Journal of Tissue Engineering Research
基金
新疆维吾尔自治区青年基金(2013211B53)~~
作者简介
陈诚，女，1988年生，湖北省大冶市人，汉族，主要从事口腔基础研究与牙体牙髓病学的研究。
通讯作者：昊佩玲，硕士，主任医师，新疆医科欠学第二附属医院口腔科，新疆维吾尔自治区乌鲁木齐市830063
