title: Expression of collagenase-3 (matrix metalloproteinase-13) in transitional-cell carcinoma of the urinary bladder.
abstract: Expression of collagenase-3 [matrix metalloproteinase-13 (MMP-13)] has been previously demonstrated in squamous-cell carcinomas of both the head and neck and the vulva, cutaneous basal-cell carcinomas, chondrosarcomas and melanomas. Using in situ hybridization, MMP-13 mRNA expression was detected in 13 of 23 (52%) urinary bladder transitional-cell carcinomas (TCCs). Expression was restricted to cells in the invading edges of tumors. No expression of MMP-13 mRNA could be detected in normal urothelium. As detected by immunohistochemistry, MMP-13 protein showed an expression pattern similar to that of MMP-13 mRNA. Expression of MMP-13 mRNA and protein was also detected in 2 bladder carcinoma cell lines (RT4 and T24). In these cell lines, TNF-alpha potently induced MMP-13 mRNA expression. Retinoids and a selective p38 inhibitor, SB203580, potently inhibited MMP-13 mRNA expression. Our results demonstrate MMP-13 expression in human urinary bladder carcinoma cells in vivo and in vitro and suggest that MMP-13 may serve as a marker for transformation and invasion in urinary bladder TCCs.
authors.affiliation: Department of Surgery, Turku University Central Hospital, Finland.
authors.forename: P J
authors.initials: PJ
authors.lastname: Boström
authors.forename: L
authors.initials: L
authors.lastname: Ravanti
authors.forename: N
authors.initials: N
authors.lastname: Reunanen
authors.forename: V
authors.initials: V
authors.lastname: Aaltonen
authors.forename: K O
authors.initials: KO
authors.lastname: Söderström
authors.forename: V M
authors.initials: VM
authors.lastname: Kähäri
authors.forename: M
authors.initials: M
authors.lastname: Laato
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor; D002295:Carcinoma, Transitional Cell / Q000201:enzymology*; D017364:Collagenases / Q000235:genetics*; D005260:Female; D006801:Humans; D008297:Male; D053509:Matrix Metalloproteinase 13; D008875:Middle Aged; D020928:Mitogen-Activated Protein Kinases / Q000037:antagonists & inhibitors / Q000502:physiology; D012333:RNA, Messenger / Q000032:analysis; D012176:Retinoids / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology; D001749:Urinary Bladder Neoplasms / Q000201:enzymology*; D048051:p38 Mitogen-Activated Protein Kinases
chemical_list: D014408:Biomarkers, Tumor; D012333:RNA, Messenger; D012176:Retinoids; D014409:Tumor Necrosis Factor-alpha; D020928:Mitogen-Activated Protein Kinases; D048051:p38 Mitogen-Activated Protein Kinases; D017364:Collagenases; C507079:MMP13 protein, human; D053509:Matrix Metalloproteinase 13