Overexpression of laminin-5 gamma2 chain and its prognostic significance in urothelial carcinoma of urinary bladder: association with expression of cyclooxygenase 2, epidermal growth factor receptor [corrected] and human epidermal growth factor receptor [corrected] 2

Hum Pathol. 2005 May;36(5):522-30. doi: 10.1016/j.humpath.2005.02.013.


Laminin-5 (LN-5) and cyclooxygenase 2 (COX-2) play important roles in many kinds of cancers. Recently, it has been reported that epidermal growth factor receptor [corrected] (EGFR) and/or human epidermal growth factor receptor [corrected] 2 (HER2) expressions are associated with LN-5 and/or COX-2 expressions in a few carcinoma cell lines and human tumor tissue. LN-5, COX-2, EGFR, and HER2 expressions were examined immunohistochemically in 67 patients with urothelial carcinomas (UCs), and associations among these 4 biomarkers and clinicopathologic characteristics were investigated. Patients were classified into transurethral resection group and cystectomy group based on clinical end points, and prognostic significances of increased expressions were evaluated. Overexpression of LN-5, COX-2, EGFR, and HER2 was observed in 16 (23.9%), 34 (50.7%), 42 (62.7%), and 15 (22.4%) of 67 patients, respectively. LN-5 overexpression was associated high-grade (P = .002), invasive (pTa+1 versus pT2-4, P = .011), and nonpapillary (P = .027) UCs. Concerning EGFR and HER2, high-grade (EGFR, P = .0009; HER2, P = .003) and nonpapillary (EGFR, P = .016; HER2, P = .0002) UCs had a significantly higher overexpression rate. UCs penetrating basal membrane (pT1-4) showed significantly higher overexpression rates than pTa UCs on all biomarkers. In transurethral resection group, LN-5 overexpression could be proved as an independent prognostic parameter for intravesical recurrence (P = .007), whereas in cystectomy group, nodal involvement was an independent prognostic parameter for cause-specific survival (P = .025). The current study showed that the 4 biomarkers were associated with aggressive behaviors of UCs. Above all, LN-5 overexpression was considered to play an important role in intravesical recurrence of superficial UCs.

Publication types

  • Comparative Study

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Biomarkers, Tumor / analysis
  • Carcinoma, Transitional Cell / metabolism
  • Carcinoma, Transitional Cell / mortality
  • Carcinoma, Transitional Cell / pathology*
  • Cyclooxygenase 2
  • Epidermal Growth Factor / biosynthesis*
  • Female
  • Humans
  • Immunohistochemistry
  • Laminin / biosynthesis*
  • Lymphatic Metastasis / pathology
  • Male
  • Membrane Proteins
  • Middle Aged
  • Prognosis
  • Prostaglandin-Endoperoxide Synthases / biosynthesis*
  • Receptor, ErbB-2 / biosynthesis*
  • Survival Analysis
  • Urinary Bladder Neoplasms / metabolism
  • Urinary Bladder Neoplasms / mortality
  • Urinary Bladder Neoplasms / pathology*
  • Urologic Surgical Procedures
  • Urothelium / metabolism
  • Urothelium / pathology


  • Biomarkers, Tumor
  • LAMC2 protein, human
  • Laminin
  • Membrane Proteins
  • Epidermal Growth Factor
  • Cyclooxygenase 2
  • PTGS2 protein, human
  • Prostaglandin-Endoperoxide Synthases
  • Receptor, ErbB-2