title: [Molecular analysis of TP53, D9S1747, D9S162 and RPS6 in oral squamous cell carcinoma].
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.
authors.affiliation: Department of Pathology, School of Stomatology, Wuhan University, Wuhan 430079, China.
authors.forename: Xin-Hong
authors.initials: XH
authors.lastname: Wang
authors.forename: Ying-Ying
authors.initials: YY
authors.lastname: Zhang
authors.forename: Xin-Ming
authors.initials: XM
authors.lastname: Chen
authors.forename: Zhi-Jun
authors.initials: ZJ
authors.lastname: Sun
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000473:pathology; D002886:Chromosomes, Human, Pair 17; D002899:Chromosomes, Human, Pair 9; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019656:Loss of Heterozygosity; D008207:Lymphatic Metastasis; D008297:Male; D053842:Microsatellite Instability; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000235:genetics* / Q000473:pathology; D060787:Neoplasm Grading; D009367:Neoplasm Staging; D012189:Retrospective Studies; D038601:Ribosomal Protein S6 / Q000235:genetics; D015996:Survival Rate; D016159:Tumor Suppressor Protein p53 / Q000235:genetics*
chemical_list: D038601:Ribosomal Protein S6; C495901:TP53 protein, human; D016159:Tumor Suppressor Protein p53