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口腔癌前病变、口腔鳞癌3p、9p染色体微卫星位点杂合性缺失研究 被引量:9

A study on the loss of heterozygosity of microsatellite motif at chrososome 3p 9p in oral precancer and oral cancer
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摘要 目的 探讨 3p、9p微卫星分析在口腔粘膜癌前病变中的改变及应用价值。 方法 应用PCR为基础的微卫星分析技术 ,选取人正常口腔粘膜 (8例 )、口腔白斑 (31例 )及口腔鳞状细胞癌 (2 2例 )标本 ,分析分别位于3p(D3S6 5 9)、9p(D9S16 1、D9S15 7、D9S171)上四位点微卫星的改变。 结果 在正常口腔粘膜 (NOM )及单纯上皮增生组均未见等位基因的改变。在口腔鳞癌 (OSCC)组中 12 / 2 2 (5 4.5 % )存在至少一个位点的杂合性缺失 (LOH) ,异常增生组中 6 / 2 3(2 5 .1% )存在至少一个位点的LOH。还观察到这几个位点均存在一定频率的微卫星不稳定性(MI)。OSCC组 9/ 2 2观察到MI,达 40 .9% ,异常增生组中达 2 1.9%。结论  3p、9p上可能存在与口腔鳞癌相关的抑癌基因。 3p、9p上这四位点的改变可能系口腔鳞癌发生的早期分子事件。本研究提示该四位点微卫星不稳定性在一部分口腔癌发生中起一定作用。 Objective To detect the deletion of chorosome 3p,9p in oral precancous lesion and oral squamous cell carcinoma(OSCC).Methods Microsatellite motif analysis based on PCR was used.8 specimans,obtained from human normal oral epithelium(NOM),31 from lekuoplakia(23 with dysplasia),and 22 OSCC was analyzed by PCR with primers flr D3S659,D9S157.All data was analysized with SPSS- 9.0 statistical software.Results We found loss of heterozyosity with at least one marker in 54.5 %(12/22) of OSCC cases and 25.1 %(6/23) in dysplasia cases respectively,microsatellite instability in 40.9 %(8/22) OSCC cases and 21.9 %(5/23) dysplasia cases respectively.No deletion was detected in NOM.Conclusion Some putative tumor suppressor gene in oral cancer lies in the 3p 13region,and in 9p21~23.The deletion of these four microsatellite-motif is the early event of oral carcinogenesis.
出处 《现代口腔医学杂志》 CAS CSCD 2002年第2期110-113,共4页 Journal of Modern Stomatology
基金 国家自然科学基金资助 (编号 :30 0 70 815 )
关键词 癌前病变 口腔癌 口腔鳞癌 3p 9p 染色体 杂合性缺失 Precancer Microsatellite motif Oral cancer
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