title: Identification of putative target genes for amplification within 11q13.2 and 3q27.1 in esophageal squamous cell carcinoma.
abstract: BACKGROUND
  Genomic aberration is a common feature of human cancers and also is one of the basic mechanisms that lead to overexpression of oncogenes and underexpression of tumor suppressor genes. Our study aims to identify frequent genomic changes and candidate copy number driving genes in esophageal squamous cell carcinoma (ESCC).
  
  
  METHODS
  We used array comparative genomic hybridization to identify recurrent genomic alterations and screened the candidate targets of selected amplification regions by quantitative and semi-quantitative RT-PCR.
  
  
  RESULTS
  Thirty-four gains and 16 losses occurred in more than 50 % of ESCCs. High-level amplifications at 7p11.2, 8p12, 8q24.21, 11q13.2-q13.3, 12p11.21, 12q12 and homozygous deletions at 2q22.1, 8p23.1-p21.2, 9p21.3 and 14q11.2 were also identified. 11q13.2 was a frequent amplification region, in which five genes including CHKA, GAL, KIAA1394, LRP5 and PTPRCAP were overexpressed in tumor tissues than paracancerous normal tissues. The expression of ALG3 at 3q27.1 was higher in ESCCs, especially in patients with lymph node metastasis.
  
  
  CONCLUSIONS
  Target gene identification of amplifications or homozygous deletions will help to reveal the mechanism of tumor formation and explore new therapy method.
authors.affiliation: Faculty of Medicine, Kunming University of Science and Technology, Kunming, China.
authors.forename: Z-Z
authors.initials: ZZ
authors.lastname: Shi
authors.forename: Y-Y
authors.initials: YY
authors.lastname: Jiang
authors.forename: J-J
authors.initials: JJ
authors.lastname: Hao
authors.forename: Y
authors.initials: Y
authors.lastname: Zhang
authors.forename: T-T
authors.initials: TT
authors.lastname: Zhang
authors.forename: L
authors.initials: L
authors.lastname: Shang
authors.forename: S-G
authors.initials: SG
authors.lastname: Liu
authors.forename: F
authors.initials: F
authors.lastname: Shi
authors.forename: M-R
authors.initials: MR
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000473:pathology*; D002869:Chromosome Aberrations; D002880:Chromosomes, Human, Pair 11 / Q000235:genetics*; D002893:Chromosomes, Human, Pair 3 / Q000235:genetics*; D055028:Comparative Genomic Hybridization; D004938:Esophageal Neoplasms / Q000235:genetics* / Q000473:pathology*; D000077277:Esophageal Squamous Cell Carcinoma; D005260:Female; D005784:Gene Amplification; D018628:Gene Dosage; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008207:Lymphatic Metastasis / Q000235:genetics; D008297:Male; D008875:Middle Aged; D060888:Real-Time Polymerase Chain Reaction; D020133:Reverse Transcriptase Polymerase Chain Reaction