title: Expression of matrix metalloproteinase-1, -2 and -3 in squamous cell carcinoma and actinic keratosis.
abstract: Matrix metalloproteinase (MMP) plays an important role in extracellular matrix degradation associated with cancer invasion. An expression of MMP-1 (interstitial collagenase), MMP-2 (72-kDa type IV collagenase) and MMP-3 (stromelysin-1) was investigated in squamous cell carcinoma (SCC) and its precancerous condition, actinic keratosis (AK), using in situ hybridization techniques. MMP-1 mRNA was detected in tumour cells and/or in stromal cells in all cases of SCC, four of six AKs adjacent to SCC and four of 16 AKs. MMP-2 and MMP-3 mRNAs were detected in SCC but not in AK. The expression of MMP-3 correlated to that of MMP-1 (P = 0.03) localized at the tumour mass and stroma of the invasive area, while MMP-2 mRNA was detected widely throughout the stroma independent of MMP-1 expression. Our results indicated that the expression of MMP-1, -2 and -3 showed different localization patterns, suggesting a unique role of each MMP in tumour progression. Moreover, MMP-1 expression could be an early event in the development of SCC, and AK demonstrating MMP-1 mRNA, might be in a more advanced dysplastic state, progressing to SCC.
authors.affiliation: Division of Dermatology, National Chiba Hospital, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Tsukifuji
authors.forename: K
authors.initials: K
authors.lastname: Tagawa
authors.forename: A
authors.initials: A
authors.lastname: Hatamochi
authors.forename: H
authors.initials: H
authors.lastname: Shinkai
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000201:enzymology*; D017364:Collagenases / Q000096:biosynthesis* / Q000235:genetics; D020405:Dermis / Q000378:metabolism; D004817:Epidermis / Q000378:metabolism; D018093:Gelatinases / Q000096:biosynthesis* / Q000235:genetics; D006801:Humans; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D015603:Keratinocytes / Q000378:metabolism; D007642:Keratosis / Q000201:enzymology* / Q000209:etiology; D020781:Matrix Metalloproteinase 1; D020778:Matrix Metalloproteinase 2; D019278:Matrix Metalloproteinase 3 / Q000096:biosynthesis* / Q000235:genetics; D008666:Metalloendopeptidases / Q000096:biosynthesis* / Q000235:genetics; D012333:RNA, Messenger / Q000096:biosynthesis; D012878:Skin Neoplasms / Q000201:enzymology*; D017154:Stromal Cells / Q000378:metabolism; D014466:Ultraviolet Rays / Q000009:adverse effects
chemical_list: D012333:RNA, Messenger; D017364:Collagenases; D018093:Gelatinases; D008666:Metalloendopeptidases; D019278:Matrix Metalloproteinase 3; D020778:Matrix Metalloproteinase 2; D020781:Matrix Metalloproteinase 1