Abstract: ObjectiveTo detect the levels of bone morphogenetic protein-2(BMP-2) mRNA in gunshot fracture healing of the rabbits.MethodsA model of primary treating gunshot fracture of the rabbit with external fixator and the real time fluorescence quantitative reverse transcription polymerase chain reaction(FQ-RT-PCR) technology with SYBR Green I were established.The levels of BMP-2 mRNA 1,2,3 and 4 weeks after operation were detected with FQ-RT-PCR respectively.ResultsIn the control group,BMP-2 mRNA of the bone tissue began to rise at the first week after fracture and the peak of mRNA expression appeared at the second week.The expression returned to normal at the forth week.In the experimental group,the BMP-2 mRNA rose more slowly that it arrived peak stage at the third week and was significantly lower in experimental group than that in control group at the same phases.ConclusionReal time FQ-RT-PCR is a good method for measuring the levels of BMP-2 mRNA during gunshot fracture healing.The mRNA expression rose more slowly and was significantly lower in gunshot fracture than in common fracture at the same phases.

Key words: gunshot fracture, bone morphogenetic protein-2(BMP-2), real time fluorescence quantity, reverse transcription polymerase chain reaction(RT-PCR)