P16蛋白在口腔疣状癌组织中的表达及意义

Expression of P16 protein in oral verrucous carcinoma

目的 :研究P16蛋白在口腔疣状癌中的表达状况并与其在口腔黏膜鳞状细胞癌的表达对比 ,探讨其在口腔疣状癌发生发展中的生物学意义。方法 :采用SP免疫组化方法分别检测 8例正常口腔黏膜、13例疣状癌、10例高分化鳞癌、10例低分化鳞癌组织中P16蛋白的表达。结果 :疣状癌P16蛋白表达缺失率为 2 3 .1% ( 3 /13 ) ,过度表达率为 69.2 % ( 9/13 ) ,其平均染色强度高于高分化鳞癌和低分化鳞癌组 (P <0 .0 5 )。结论 :P16基因变异在口腔疣状癌的发生过程中起一定作用 ,疣状癌中P16蛋白过度表达提示疣状癌可能与HPV关系密切。

Objective: To investigate the expression of P16 protein in oral verrucous carcinoma (VC) and oral squamous cell carcinoma (SCC) and to reveal its role in the occurrence and development of VC . Methods: Using streptavidin/peroxidase(SP) immunohistochemical technique(IHC) the expression of P16 protein in 41 samples, including 8 of normal mucosa (NM),13 VC,10 well differentiated squamous cell carcinoma (wdSCC),10 poorly differentiated squamous cell carcinoma (pdSCC) was studied.The average intensity score (IS) of immunohistochemical staining of the samples was calculated. Results: Weakly positive of P16 protein was obsereved in the 8 cases of NM. Positive expression was found in 10 of the 13 VC cases,8 of the 10 wdSCC and 6 of the 10 pdSCC.The IS in NM,VC, wd SCC and pdSCC was 0.4375±0.0498,1.5846±0.2681,0.9900±0.1894 and 0.8800±0.2590 respectively.The mean intensity of P16 protein in VC was higher than in wdSCC and pdSCC(P<0.05) .Conclusions: Mutations of p16 gene may play a role in carcinogenesis of VC. Overexpression of P16 protein in VC suggests that HPV infection is involved in the carcinogenesis of VC .