阿仑膦酸钠促进兔快速下颌骨牵张成骨的作用机制  

Mechanism by which alendronate promotes rapid mandibular distraction osteogenesis in rabbits

作　　者：叶芝魁 张志明 崔琳娜 蒋校文 Ye Zhikui;Zhang Zhimin;Cui Linna;Jiang Xiaowen(Department of Stomatology,the First People’s Hospital of Chenzhou City,School of Stomatology,South Medical University&Institute of Translation Medicine,University of South China,Chenzhou 423000,Hunan Province,China)

机构地区：[1]南方医科大学口腔医学院附属郴州市第一人民医院口腔科&南华大学转化研究所,湖南省郴州市423000

出　　处：《中国组织工程研究》2024年第23期3642-3647,共6页Chinese Journal of Tissue Engineering Research

基　　金：湖南省自然科学基金(2018JJ2015,2022JJ30090),项目负责人:蒋校文;郴州市第一人民医院科研项目(2022YJ-13,2021B011,2022KJ-018),项目负责人:蒋校文。

摘　　要：背景:有研究发现局部应用阿仑膦酸钠能够促进成骨,但少见其在牵张成骨过程中的尝试及探讨。目的:观察阿仑膦酸钠对快速兔下颌骨牵张成骨的促进作用并探讨其机制。方法:36只新西兰雄性白兔在经过3 d的滞留期后以1.5 mm/12 h(3 d)的牵张速率进行快速牵张,随后实验动物被随机分为A、B和C组,每组12只。在固定期第1,3和7天,A组动物牵张间隙注射200μg/kg阿仑膦酸钠,B组动物牵张间隙注射100μg/kg阿仑膦酸钠,C组动物作为对照组。在固定期第4,8周,进行CT和双能量X射线骨密度测量。在第4周完成核素扫描后处死部分动物收集标本进行Western Blotting及抗酒石酸酸性磷酸酶染色;在第8周处死剩余动物后进行三点弯曲力学试验。结果与结论:①CT结果发现B组兔牵张间隙新生骨质明显优于A、C组;②在第4周时B组的骨密度计数为(0.092±0.010)g/cm^(2),是A组的1.26倍(P<0.001)、C组的1.28倍(P<0.001);在第8周时B组的骨密度为(0.175±0.029)g/cm^(2),是A组的1.38倍(P<0.001)、C组的1.45倍(P<0.001);③抗酒石酸酸性磷酸酶染色发现C组切片破骨样细胞计数是A组的2.83倍(P<0.001)、B组的2.21倍(P<0.001);④C组牵张间隙核浓集强度高于A、B组;⑤Western Blotting结果发现B组成骨信号蛋白Runx2表达明显强于A、C组;⑥B组牵张间隙的最大力学负载(158.48±23.21)N是A组的1.26倍(P=0.007)、C组的1.31倍(P=0.003);⑦结果表明低浓度阿仑膦酸钠可能通过抑制破骨信号来促进兔下颌骨快速牵张成骨。BACKGROUND:Some studies have found that local application of alendronate can promote osteogenesis,but less is reported on the process of distraction osteogenesis.OBJECTIVE:To observe the promoting effect of alendronate on rapid mandibular distraction in a rabbit model and explore its possible mechanism.METHODS:Thirty-six male New Zealand white rabbits were randomly divided into groups A,B and C(n=12 per group)after operation and rapid distraction(3-day delay period followed by 3-day distraction at 1.5 mm/12 hours).At the 1st,3rd and 7th days of the consolidation period,animal were injected with 200μg/kg alendronate in group A and 100μg/kg alendronate in group B,while those in group C were treated as controls.CT scanning and dual energy X-ray bone mineral density measurement were performed at 4 and 8 weeks of the consolidation period.After the radionuclide scanning was completed at the 4th week,several animals were sacrificed and the samples were collected for western blot assay and tartrate resistant acid phosphatase staining.A three-point bending test was performed after the animals were sacrificed at the 8th week.RESULTS AND CONCLUSION:CT results showed that bone formation in the distraction space of group B was significantly better than that in groups A and C.At the 4th week,the bone mineral density in group B was(0.092±0.010)g/cm^(2),which was 1.26 times higher than that in group A(P<0.001)and 1.28 times higher than that in group C(P<0.001).At the 8th week,the bone mineral density in group B was(0.175±0.029)g/cm^(2),which was 1.38 times higher than that in group A(P<0.001)and 1.45 times higher than that in group C(P<0.001).Tartrate resistant acid phosphatase staining showed that the number of osteoclast-like cells in group C were 2.83 times more than that in group A(P<0.001)and 2.21 times more than that in group B(P<0.001).The radionuclide intensity was higher in group C than in groups A and B.Western blot assay results showed that the expression of Runx2 was significantly stronger in group B than in grou

关 键 词：牵张成骨 阿仑膦酸钠 兔 下颌骨 抗酒石酸酸性磷酸酶 破骨细胞 

分 类 号：R459.9[医药卫生—治疗学] R318[医药卫生—临床医学] R782.23