富血小板纤维蛋白对下颌骨牵引成骨区RANKL表达的影响
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摘要
目的通过动物实验,研究应用富血小板纤维蛋白(Platelet-rich Fibrin,PRF)对兔下颌骨牵引成骨区核因子KB受体活化因子配体(receptor activator for NF-KB ligand,RANKL)的影响,为临床研究与应用提供参考依据。方法在20只成年大耳白兔的一侧下颌骨前部行骨切开术,用牵引器延长一侧下颌骨4 mm,牵引间隙放置PRF膜;另一侧下颌骨行骨切开并安置牵引器,作为对照组,稳定期第1、7、14、21、28天,分别处死各组动物,取牵引区新生骨痂行组织学及RANKL免疫组化染色。结果下颌牵引延长后牵引间隙均有新骨形成,免疫组织化学显色RANKL主要定位于骨髓基质细胞的胞浆中,其中以稳定期的第1,14天的表达最强。在稳定期第1、14天,实验组较对照组RANKL表达的阳性细胞率及阳性面积百分比差异有统计学意义(P<0.05),以后逐渐下降,第28 d仅有微弱表达。结论动物实验表明,PRF能促进兔下颌骨牵引成骨区新骨的生成,RANKL可能在牵引成骨过程中特别是调控组织细胞应力信号传递的早期发挥破骨作用。
Objective To investigate the effects of PRF on mandibular distraction osteogenesis and the expression of RANKL in the period of distraction osteogenesis, in order to provide a reference for its clinical research and application. Methods unilateral mandibular osteotomies were performed in 20 mature rabbits, the mandibles of 20 rabbits were lengthened by 4 mm using a distractor, PRF were implanted in the osteotomy side of mandibles. Another side of the mature rabbit was cut and a distractor was implanted in the mandible as a control group. The animals were killed on 1, 7, 14, 21 and 8 days of consolidation period.The distracted calluses were harvested and processed for histological and immunohistochemistric study of RANKL. Results The regenerated bone was found in the distraction gap after mandibular lengthening, and RANKL were co- localized in bone marrow lining cells, osteoblasts and newly embedded osteocytes. The RANKL expression increased on 1 and 14 days. At the consolidation period of 1 and 14 days there was significant difference between the experiment group and control group(P<0.05). The comparison of positive cells rate and positive area percentage in distracted calluses on the 28 th day after the distraction were performed, and the results showed weak RANKL staining in the distracted callus. Conclusion PRF could accelerate bone formation of mandibular distraction osteogenesis in rabbit. RANKL may play important roles at the early stage of mandibular distraction.
Objective To investigate the effects of PRF on mandibular distraction osteogenesis and the expression of RANKL in the period of distraction osteogenesis, in order to provide a reference for its clinical research and application. Methods unilateral mandibular osteotomies were performed in 20 mature rabbits, the mandibles of 20 rabbits were lengthened by 4 mm using a distractor, PRF were implanted in the osteotomy side of mandibles. Another side of the mature rabbit was cut and a distractor was implanted in the mandible as a control group. The animals were killed on 1, 7, 14, 21 and 8 days of consolidation period.The distracted calluses were harvested and processed for histological and immunohistochemistric study of RANKL. Results The regenerated bone was found in the distraction gap after mandibular lengthening, and RANKL were co- localized in bone marrow lining cells, osteoblasts and newly embedded osteocytes. The RANKL expression increased on 1 and 14 days. At the consolidation period of 1 and 14 days there was significant difference between the experiment group and control group(P<0.05). The comparison of positive cells rate and positive area percentage in distracted calluses on the 28 th day after the distraction were performed, and the results showed weak RANKL staining in the distracted callus. Conclusion PRF could accelerate bone formation of mandibular distraction osteogenesis in rabbit. RANKL may play important roles at the early stage of mandibular distraction.
引文
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[2]Anantanarayanan P,Narayanan V,Manikandhan R,et al.Primary mandibular distraction,for management of nocturnal desaturations secondary to temporomandibular joint(TMJ)ankylosis[J].Int J Pediatr Otorhinolaryngol,2008,72(3):385-389.
[3]Kumar SP,Parmar VR,Jasrai YT,et al.HPrediction of protein targets of kinetin using in silico and in vitro methods:a case study on spinach seed germination mechanism[J].J Chem Biol,T T2015,8(3):95-105.
[4]何飞,吴勇,周艳.Notch信号促进核因子κB受体活化因子配体诱导的破骨细胞分化的体外研究[J].华西口腔医学杂志,2015,33(1):25-28.
[5]Chaudhary Z,Kumar YR,Mohanty S,et al.HAmalgamation of allogenic bone graft,platelet-rich fibrin gel,and PRF membrane in auto-transplantation of an impacted central incisor H[J].Contemp Clin Dent,2015,6(2):250-253.
[6]Gupta S,Banthia R,Singh P,et a1.HHClinical evaluation and comparison of the efficacy of coronally advanced flap alone and in combination with platelet rich fibrin membrane in the treatment of Miller Class I and II gingival recessions HH[J].Contemp Clin Dent,2015,6(2):153-160.
[7]毛晶晶,何家才,郑先雨,等.富血小板纤维蛋白在犬上颌窦底提升中促骨缺损修复的作用[J].安徽医科大学学报,2010,45(2):176-179.
[8]Lee EH,Kim JY,Kweon HY,et al.A combination graft of lowmolecular-weight silk fibroin with Choukroun platelet-rich fibrin for rabbit calvarial defect[J].Oral Surg Oral Med Oral Med Oral Pathol Oral Radiol Endod,2010,109(5):e33-38.
[9]Kon T,Cho TJ,Aizawa T,et al.Expression of osteoprotegerin,receptor activator of NF-kappa B ligand(osteoprotegerin ligand)and related proinflammatory cytokines during fracture healing[J].J Bone Miner Res,2001,16(6):1004-1014.