Molecular analysis of TP53, D9S1747, D9S162 and RPS6 in oral squamous cell carcinoma
10.3760/cma.j.issn.1002-0098.2011.01.014
- VernacularTitle:微卫星位点TP53、D9S1747、D9S162及RPS6的杂合性缺失与口腔鳞状细胞癌的关系
- Author:
Xin-Hong WANG
1
;
Ying-Ying ZHANG
;
Xin-Ming CHEN
;
Zhi-Jun SUN
Author Information
1. 山东医学高等专科学校
- Keywords:
Carcinoma,squamous cell;
Loss of heterozygosity;
Microsatellite instability
- From:
Chinese Journal of Stomatology
2011;46(1):42-46
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the correlation between the frequency of molecular abnormalities of 4 loci at chromosomal 9p21 (D9S1747 ,D9S162, RPS6) and 17p13 (TP53) and the clinical characteristics and prognosis. Methods The oral squamous cell carcinoma(OSCC) lesions in 71 patients were manually microdessected. Genomic DNA from these lesions and normal lymphnode tissu or peripheral blood of the same patients were extracted using the Watson's tissue kit. The loss of heterozygosity(LOH) and microsatellite instability (MI) of 17p13 and 9p21 were analyzed by PCR-page electrophoresis after DNA extraction. Results LOH and MI were detected in the OSCC of 48 patients (68%). The LOH and MI frequency at chromosomes 17p13 and 9P21 were 56% (35/63) and 59% (40/68) respectively. The LOH and MI frequency at 9p21 was significantly associated with WHO grading ( P ＜ 0.01 ) and lymphonode metastasis (P ＜0.01 ). The LOH and MI frequency at 17p13 was significantly associated with clinical stage (P ＜ 0.05 ). TP53 genetic aberration and 9p21 genetic aberration were significant prognostic factors for OSCC. The prognosis was poor in the LOH and MI positive group of chromosome 17p13 and 9p21. The frequency of LOH and MI at TP53 was the only independent factor for overall survival ( P ＜ 0.05 ).Conclusions The LOH and MI of 17p13 and 9p21 were related to clinical stage and lymphonode metastasis. LOH of TP53 was an independent prognostic factor for OSCC.
