title: Gene expression analysis by cDNA microarray in oral squamous cell carcinoma.
abstract: BACKGROUND
  Oral squamous cell carcinoma (OSCC) is common type of human cancer, but little is known about the molecular mechanisms deciding on this malignancy. Comprehensive gene expression profiling is essential for understanding OSCC.
  
  
  METHODS
  cDNA microarray was used to analyze expression patterns of 16 617 genes in nine OSCC patients.
  
  
  RESULTS
  Forty-seven genes with altered expression among all cases were extracted. The ontology of these 47 genes was classified into 10 categories. To validate the microarray data, the expression of genes, including TGFBI, FADD and DUSP1 was analyzed by reverse transcriptase-polymerase chain reaction (RT-PCR). By hierarchical clustering analysis, the nine cases were divided into two clusters.
  
  
  CONCLUSIONS
  The 47 genes are suggested as having a functional significance in oral squamous cell carcinogenesis. It is also suggested that the gene expression patterns by hierarchical clustering analysis can represent degrees of differentiation. The postoperative recovery was uneventful and patients free from tumor after surgery. In the future, on the occasion when the time comes that the number of cases accumulated for microarray increases and each case is observed more over a long-term, these data of 5-year survival rate will be added. Thereby, it will become possible to represent the malignancy of OSCC by these gene expression patterns.
authors.affiliation: Oral and Maxillofacial Surgery, Department of Oral Restitution, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University, Yushima, Bunkyo-ku, Japan. tomy.osur@tmd.ac.jp
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Tomioka
authors.forename: Kei-Ichi
authors.initials: K
authors.lastname: Morita
authors.forename: Shogo
authors.initials: S
authors.lastname: Hasegawa
authors.forename: Ken
authors.initials: K
authors.lastname: Omura
mesh_terms: D000328:Adult; D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000235:genetics*; D016000:Cluster Analysis; D018076:DNA, Complementary / Q000032:analysis; D005260:Female; D020869:Gene Expression Profiling; D052138:Genes, Neoplasm; D006801:Humans; D008297:Male; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000235:genetics*; D009363:Neoplasm Proteins / Q000032:analysis / Q000235:genetics; D020411:Oligonucleotide Array Sequence Analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction
chemical_list: D018076:DNA, Complementary; D009363:Neoplasm Proteins