title: Increase of MMP-13 expression in multi-stage oral carcinogenesis and epigallocatechin-3-gallate suppress MMP-13 expression.
abstract: BACKGROUND
  Matrix metalloproteinases (MMPs) play pivotal roles in tumor progression. MMP-13 (collagenase-3) digests collagen and other extracellular components.
  
  
  METHODS
  Reverse transcriptase-polymerase chain reaction (RT-PCR), immunohistochemistry and zymograph were used to study the roles of MMP-13 during the neoplastic process of oral squamous cell carcinoma (OSCC).
  
  
  RESULTS
  Increase of MMP-13 mRNA and protein expression in OSCC cell lines relative to cultivated normal oral keratinocytes was found. MMP-13 mRNA expression in OSCC was significantly higher than in non-cancerous match tissue (NCMT) in 36 tissue pairs. Esophageal squamous cell carcinoma also exhibited high MMP-13 mRNA expression. The percentage of OSCC exhibiting strong MMP-13 immunoreactivity was significantly higher than pre-invasive lesion and NCMT. Treatment with >5 microm epigallocatechin-3-gallate (EGCG) to OEC-M1 cells suppressed the expression and activity of MMP-13.
  
  
  CONCLUSIONS
  MMP-13 could be a potential tumor marker for OSCC. The effects of EGCG in tumor inhibition may act partially through the modulation of MMP-13.
authors.affiliation: The School of Dentistry, National Yang-Ming University Taipei, Taiwan.
authors.forename: W-C
authors.initials: WC
authors.lastname: Chiang
authors.forename: Y-K
authors.initials: YK
authors.lastname: Wong
authors.forename: S-C
authors.initials: SC
authors.lastname: Lin
authors.forename: K-W
authors.initials: KW
authors.lastname: Chang
authors.forename: C-J
authors.initials: CJ
authors.lastname: Liu
mesh_terms: D000328:Adult; D000368:Aged; D016588:Anticarcinogenic Agents / Q000494:pharmacology*; D015153:Blotting, Western; D002294:Carcinoma, Squamous Cell / Q000201:enzymology* / Q000473:pathology; D002392:Catechin / Q000031:analogs & derivatives* / Q000494:pharmacology; D017364:Collagenases / Q000032:analysis / Q000096:biosynthesis*; D004591:Electrophoresis, Polyacrylamide Gel; D006801:Humans; D007150:Immunohistochemistry; D053509:Matrix Metalloproteinase 13; D061965:Matrix Metalloproteinase Inhibitors; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000201:enzymology* / Q000473:pathology; D009367:Neoplasm Staging; D011480:Protease Inhibitors / Q000494:pharmacology*; D012333:RNA, Messenger / Q000032:analysis; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014407:Tumor Cells, Cultured
chemical_list: D016588:Anticarcinogenic Agents; D061965:Matrix Metalloproteinase Inhibitors; D011480:Protease Inhibitors; D012333:RNA, Messenger; D002392:Catechin; C045651:epigallocatechin gallate; D017364:Collagenases; C507079:MMP13 protein, human; D053509:Matrix Metalloproteinase 13