中文摘要：

目的研究核因子κB受体激活因子配基（RANKL）在成釉细胞瘤（AM）中的表达及其在AM骨吸收机制中的作用。方法收集多囊或实性型AM石蜡标本34例、新鲜标本17例及由新鲜标本培养的AM细胞标本12例,采用免疫组化及Western blot方法检测RANKL在AM组织和细胞中的表达水平。结果 AM标本中,RANKL阳性表达率为86.27%（41/51）。RANKL在AM组织及体外培养的AM细胞中稳定表达。结论 RANKL在AM的骨吸收机制中可能发挥重要作用。

英文摘要：

Objective To investigate the expression of receptor activator of nuclear factor kappa B-ligand（RANKL） in ameloblastoma（AM） and the role of RANKL in bone resorption caused by AM. Methods The expression of RANKL was detected by immuohistochemistry and Western blot in 34 cases of paraffin specimen of solid or multicystic AM,17 cases of fresh specimen of solid or multicystic AM and 12 cases of cell specimen of AM derived from fresh specimen. Results The positive expression rate of RANKL was 86.27%（41/51） in the specimen of AM.RANKL was constantly expressed in the AM tissues and AM cells in vitro. Conclusion RANKL may play an important role in the process of bone resorption caused by AM.