title: Gain of 5p15.33 is associated with progression of bladder cancer.
abstract: OBJECTIVE
  To search for a biological marker to distinguish low-risk from high-risk bladder cancer indicating disease progression.
  
  
  METHODS
  The whole genome-wide copy numbers were screened in 18 patients with bladder cancer using array comparative genomic hybridization (CGH) consisting of 4,030 bacterial artificial chromosome clones.
  
  
  RESULTS
  Gain of 5p15.33, including TPPP (tubulin polymerization-promoting protein)and ZDHHC11 (zinc finger DHHC domain-containing protein 11) genes, was detected in 5 of 9 (55.6%) high-grade bladder cancers and no (0%; n = 9) low-grade bladder cancer. To confirm the preliminary data, 5p15.33 gain was studied by fluorescence in situhybridization (FISH) in 100 patients, and the results were compared with biological characteristics. In FISH analysis, gain of 5p15.33 was significantly correlated with higher histological grade (p < 0.0001) and advanced pathological stage (p = 0.0284). Tumors with a gain of 5p15.33 had a significantly higher progression-free survival rate than those without (p = 0.0006, log-rank test). Multivariate analysis revealed that gain of 5p15.33 was a predictor for disease progression in bladder cancer (hazard ratio: 1.887, 95% confidence interval: 1.215-2.968, p = 0.0050).
  
  
  CONCLUSIONS
  These data suggest that gain of 5p15.33 (TPPP and ZDHHC11) may become a potential biomarker identifying high-risk patients with disease progression in bladder cancer.
authors.affiliation: Department of Urology, Yamaguchi University School of Medicine, Ube, Japan.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Yamamoto
authors.forename: Yasuyo
authors.initials: Y
authors.lastname: Chochi
authors.forename: Hideyasu
authors.initials: H
authors.lastname: Matsuyama
authors.forename: Satoshi
authors.initials: S
authors.lastname: Eguchi
authors.forename: Shigeto
authors.initials: S
authors.lastname: Kawauchi
authors.forename: Tomoko
authors.initials: T
authors.lastname: Furuya
authors.forename: Atsunori
authors.initials: A
authors.lastname: Oga
authors.forename: Jason J
authors.initials: JJ
authors.lastname: Kang
authors.forename: Katsusuke
authors.initials: K
authors.lastname: Naito
authors.forename: Kohsuke
authors.initials: K
authors.lastname: Sasaki
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D022202:Chromosomes, Artificial, Bacterial; D002895:Chromosomes, Human, Pair 5 / Q000235:genetics*; D018450:Disease Progression; D005260:Female; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D008297:Male; D008875:Middle Aged; D009419:Nerve Tissue Proteins / Q000235:genetics; D018570:Risk Assessment; D016019:Survival Analysis; D001749:Urinary Bladder Neoplasms / Q000235:genetics* / Q000473:pathology*
chemical_list: D009419:Nerve Tissue Proteins; C118136:TPPP protein, human