【摘要】 目的　通过观察碱性成纤维细胞生长因子 (bFGF)在自体微小颗粒骨异位成骨过程中的表达 ,探讨微小颗粒骨移植的成骨机制。　方法　 4 8只日本大耳白兔随机分为两组 ,分别在臀大肌肌袋内植入自体微小颗粒骨及自体块状骨。术后按期取材 ,进行组织学、免疫组化及原位杂交染色。　结果　 (1)颗粒骨在成骨过程中吸收较快 ,至术后 2 8d时完全被新生骨替代。块状骨成骨能力弱 ,以骨吸收为主。 (2 )免疫组化及原位杂交结果显示两组间差异有显著性意义 (P <0 .0 5 )。　结论　颗粒骨异位成骨能力强于块状骨 ,bFGF在此过程中起重要作用。更多还原

【Abstract】 Objective To study the expression of basic fibroblast growth factor (bFGF) in ectopic osteogenesis of autogenetic minimal morselized bone so as to discuss the bone formation of minimal morselized bone. Methods All 48 rabbits were divided into two groups randomly. Then autogenetic minimal morselized bone and bulk bone were implanted into the muscle bag models of gluteus maximus muscle respectively. Samples were harvested on day 1,3,5,7,11,14,21 and 28 postoperatively and tested by the methods of histology, immunohistochemistry (IHC) and in situ hybridization (ISH). Results (1) The morselized bone grew faster than the bulk bone and was replaced by neonatal bone on the 28th day. In the group of bulk bone, the ability of osteogenesis was weaker dominated by bone absorption. (2) In the morselized bone group, the expression peaks of bFGF and bFGFmRNA appeared at day 5-7 postoperatively, mainly appeared in the mesenchymal cells, fibroblast, chondrocyte and osteoblast by the method of IHC and ISH. While in the group of bulk bone, the expressions of bFGF and bFGFmRNA were similar to those in the morselized bone group. The difference between the two groups was significant ( P <0.05). Conclusions The ectopic osteogenesis of autogenetic morselized minimal bone is better than that of bulk bone, in which bFGF plays an important role in osteogenesis.更多还原