title: Prognostic significance of altered p120 ctn expression in bladder cancer.
abstract: OBJECTIVE
  To identify the frequency of change in the expression and localization of p120(ctn) in bladder tumours and its association with clinical outcomes, and to investigate the potential role of p120(ctn) in the migratory and invasive behaviour of bladder carcinoma cells.
  
  
  METHODS
  In all, 425 superficial tumour specimens (Ta, Tis and T1) and 305 invasive (T2-T4) tumour specimens from 534 patients were assembled in 10 tissue microarrays. P120(ctn) immunostaining was scored for intensity and cellular localization and correlated with clinical variables and survival analysis. Knockdown of p120(ctn) was achieved using small-interference RNA (siRNA) followed by the assessment of migration and invasion behaviour in standard in vitro assays.
  
  
  RESULTS
  The expression levels of p120 catenin inversely correlated with pathological tumour stage (P < 0.001), histological grade (P < 0.001), presence of lymphovascular invasion (P = 0.02) but not lymph node (LN) involvement (P = 0.17). Non-membranous localization of p120(ctn) correlated with stage (P < 0.001), grade (P < 0.001), lymphovascular invasion (P = 0.04) and LN-positive disease (P = 0.02). A low expression level of p120(ctn) was linked to a poor outcome in cancer-specific survival analysis. Knockdown of p120(ctn) using siRNA resulted in a significant reduction in the migration and invasive potential of bladder carcinoma cells.
  
  
  CONCLUSIONS
  Our findings suggest that p120(ctn) acts as a prognostic factor in bladder tumours and has a primary role to play in the migratory and invasive behaviour of bladder carcinoma cells.
authors.affiliation: Cell and Molecular Biology Laboratory, R.E. Wise M.D. Research and Education Institute, Department of Urology, Lahey Clinic, Burlington, MA 01805, USA.
authors.forename: Brasil
authors.initials: B
authors.lastname: Silva Neto
authors.forename: Gjanje L
authors.initials: GL
authors.lastname: Smith
authors.forename: Jessica A
authors.initials: JA
authors.lastname: Mandeville
authors.forename: Alex J
authors.initials: AJ
authors.lastname: Vanni
authors.forename: Chad
authors.initials: C
authors.lastname: Wotkowicz
authors.forename: Kimberly M
authors.initials: KM
authors.lastname: Rieger-Christ
authors.forename: Egbert
authors.initials: E
authors.lastname: Baumgart
authors.forename: Micah A
authors.initials: MA
authors.lastname: Jacobs
authors.forename: Michael S
authors.initials: MS
authors.lastname: Cohen
authors.forename: Ron
authors.initials: R
authors.lastname: Zeheb
authors.forename: Massimo
authors.initials: M
authors.lastname: Loda
authors.forename: John A
authors.initials: JA
authors.lastname: Libertino
authors.forename: Ian C
authors.initials: IC
authors.lastname: Summerhayes
mesh_terms: D014408:Biomarkers, Tumor / Q000378:metabolism*; D015153:Blotting, Western; D002295:Carcinoma, Transitional Cell / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D051177:Catenins; D015815:Cell Adhesion Molecules / Q000378:metabolism*; D015653:Cystectomy / Q000379:methods; D006801:Humans; D007150:Immunohistochemistry; D008207:Lymphatic Metastasis; D046228:Microarray Analysis; D009361:Neoplasm Invasiveness; D009367:Neoplasm Staging; D010750:Phosphoproteins / Q000378:metabolism*; D011379:Prognosis; D034741:RNA, Small Interfering; D012307:Risk Factors; D016019:Survival Analysis; D001749:Urinary Bladder Neoplasms / Q000401:mortality / Q000473:pathology* / Q000601:surgery; D000095002:Delta Catenin
chemical_list: D014408:Biomarkers, Tumor; D051177:Catenins; D015815:Cell Adhesion Molecules; D010750:Phosphoproteins; D034741:RNA, Small Interfering; D000095002:Delta Catenin; C000722347:CTNND1 protein, human