体外培养成骨细胞的影响因素

目的:成骨细胞是骨形成和骨代谢的核心部分,成骨细胞体外培养是研究骨代谢和成骨机制的重要手段。因此,研究体外培养成骨细胞的影响因素有重要意义。资料来源:应用计算机检索Medline1980-01/2004-12相关体外培养成骨细胞的影响因素的文献,检索词“osteoblasts,cultureinvitro,influenc-ingfactors”,限定文献语言种类为English。同时计算机检索CBM1995-01/2004-12相关文献,检索词为“成骨细胞,体外培养,影响因素”,限定语言种类为中文。资料选择:对资料进行初审,选取符合研究要求的文献查找全文。纳入标准:影响体外培养成骨细胞的因素,包括:①物理因素。②微量元素。③生长因子。④激素。排除标准:综述文献、重复研究。资料提炼:共收集到105篇关于体外培养成骨细胞影响因素的文献,排除重复或类似的同一研究,纳入17篇符合标准的文献。资料综合:①物理因素:电离辐射、微重力、外力、氧压等。②微量元素:微量元素缺乏其可能使骨骼发育受到障碍,甚至畸形,成骨细胞的增殖分化的过程与某些微量元素有着密切的关系,主要包括锌、铝、氟、铜、锰、钙、镁等。③生长因子:与骨生成有关的生长因子主要有骨形态发生蛋白、血小板衍生生长因子、成纤维细胞生长因子、转化生长因子β、胰岛素样生长因子、成骨生长肽等。④激素:促进成骨细胞的增殖分化的激素有生长激素、雌激素、甲状腺激素、甲状旁腺激素、糖皮质激素等。结论:体外培养成骨细胞的影响因素较多,了解这些影响因素有助于研究有效的体外培养成骨细胞方法及组织工程学的研究。

Factors influencing the in vitro culture of osteoblasts

OBJECTIVE: Osteoblasts are essential for osteogenesis and bone metabolism, the in vitro culture of osteoblasts is the foundation for studies on bone metabolism and osteogenetic mechanism. Therefore, it is of great significance to study the related factors affecting it.DATA SOURCES: Related literature about the influencing factors of in vitro culture of osteoblasts were searched for in Medline from January 1980 to December 2004 with retrieval words of "osteoblasts, culture in vitro, in fluencing factors", with the language limited to English. Meanwhile, it was also searched in the CBM between January 1995 and December 2004 with the retrieval words of "osteoblasts, in vitro culture, influencing factors",with the language of the articles limited to Chinese.STUDY SELECTION: After preliminary examination, literature that met the need of this study was searched for the full text. Inclusion criteria: Factors influencing the in vitro culture of osteoblasts included ① physical factors; ② microelements; ③ growth factors; and ④ hormones.Reviews were removed from this study because of summary or repetitive research.DATA EXTRACTION: A total of 105 articles related to the influencing factors of the in vitrocul ture of osteoblasts were obtained, articles of repetitive and similar researchwere removed; thereby 17 articles were included in the study.DATA SYNTHESIS: ① Physical factors: Ionizing radiation, microgravity,external force, and oxygen pressure. ② Microelements: microelement deficiency would hinder the skeletal growth, or even lead to malformation. Osteoblastic proliferation is closely related to some microelements, mainly including zinc, aluminum, fluorine, copper, manganese, calcium, and magnesium. ③ Growth factors closely related to osteogenesis mainly consist of bone morphogenetic protein, platelet-derived growth factor, fibroblast growth factor, transforming growth factor-beta, insulin like growth factor,and osteogenic growth peptide (OGP). ④ Hormones capable of promoting the proliferation and differentiation are growth hormone, estrogen, thyroxine, parathyroxine, and glucocorticosteroid.CONCLUSION: Multiple factors are involved in the in vitro culture of osteoblasts. It is helpful to understand these influencing factors to seek an effective way for the in vitro culture ofosteoblasts that is applied in tissue engineering.