Effect of gene transfecting at different time on expression of cyclins in mandibular distraction area
10.3969/j.issn.1671-8348.2017.20.001
- VernacularTitle:不同时机转染基因对下颌骨牵引区细胞周期蛋白表达的影响研究
- Author:
Kang YIN
;
Chunbing HU
;
Bing ZHOU
;
Guoping WU
;
Liping ZHAO
- Keywords:
transfection time;
electroporation;
gene therapy;
distraction osteogenesis;
cyclins
- From:
Chongqing Medicine
2017;46(20):2737-2740
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the optimal time and molecular mechanism of gene therapy for promoting distraction osteogenesis by observing the effect of gene transfecting at different time on expression of cyclins in mandibular distraction area.Methods Forty eight New-Zealand rabbits were employed.After accomplishing bilateral mandibular distraction osteogenesis model,the rabbits were randomly divided into the group A,B,C and D.The group A,B and C were transfected by recombinant plasmids pIRES-hBMP2-hVEGF165 2 μg(0.1 μg/μL)at the distraction area instantly after operation,on postoperative 4,14 d and given local electroporation stimulation.The four groups entered the consolidation stage after 10 d continuous traction at a rate of 1 mm/d on postoperative 4 d.Three rabbits in each group were respectively sacrificed on 7,14,28,56 d of the consolidation stage.The expression of cyclin A,D1,and E of fresh bone tissue in distraction area were detected by immunohistochemical staining.Results Cyclin A,D1,and E were strongly expressed in the traction gap on 7,14 d of consolidation stage found,which was strongest on 7 d,moreover the group A,B and C were stronger than the group D.The expression in each group was weakened on 28,56 d.The expression on 7 d in the group B was stronger than that in the4 group A,C and D(P<0.05),the expression had no statistical difference between the group A and C(P>0.05),but all were stronger than the group D(P<0.05);the expression in the group B and C on 14 d was stronger than that in the group A and D,but the expression had no statistical difference between the group B and C and between the group A and D(P>0.05).Conclusion The high expression of cyclin A,D1 and E can promote the cellular division,proliferation and differentiation in distraction area,thus accelerates the new bone formation in the distraction area,prompting that the distraction period is the best time for distraction osteogenesis under gene therapeutic intervention.
