title: Reduction of syndecan-1 expression is associated with dysplastic oral epithelium.
abstract: Syndecans are a family of integral membrane proteoglycans that participate in cell-matrix interactions and growth factor binding. Syndecan-1 expression is induced during keratinocyte differentiation and reduced in squamous cell carcinomas. The purpose of this study was to examine the alteration in syndecan-1 expression in dysplastic oral epithelium. Sixty-six oral biopsy specimens (43 epithelial dysplasias, 3 carcinoma in situ and 20 squamous cell carcinomas) were studied using immunohistochemical methods. The normal epithelium specimens were highly positive for syndecan-1. Fifteen of 46 dysplasias or carcinoma in situ specimens showed negative or weak staining for syndecan-1, two of which were totally negative. Intermediate and strong staining were observed in 17 and 14 dysplasias or carcinoma in situ specimens, respectively. Thirteen (65%) squamous cell carcinomas showed negative or weak staining for syndecan-1, seven of which were totally negative. Only three carcinomas had a strong syndecan-1 expression. Four of the 34 patients with dysplasia who were followed up developed squamous cell carcinoma. All these dysplasias had weak or totally negative syndecan-1 expression. The results suggest that the loss of syndecan-1 is associated with dysplastic changes in oral epithelium.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Institute of Dentistry, University of Turku, Finland.
authors.forename: T
authors.initials: T
authors.lastname: Soukka
authors.forename: J
authors.initials: J
authors.lastname: Pohjola
authors.forename: P
authors.initials: P
authors.lastname: Inki
authors.forename: R P
authors.initials: RP
authors.lastname: Happonen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D014408:Biomarkers, Tumor; D002278:Carcinoma in Situ / Q000378:metabolism*; D002294:Carcinoma, Squamous Cell / Q000378:metabolism*; D002471:Cell Transformation, Neoplastic / Q000378:metabolism*; D015536:Down-Regulation; D004847:Epithelial Cells / Q000378:metabolism / Q000473:pathology*; D005260:Female; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007124:Immunoenzyme Techniques; D008297:Male; D008562:Membrane Glycoproteins / Q000096:biosynthesis*; D008875:Middle Aged; D009061:Mouth Mucosa / Q000473:pathology; D009062:Mouth Neoplasms / Q000378:metabolism*; D011230:Precancerous Conditions / Q000378:metabolism*; D011509:Proteoglycans / Q000096:biosynthesis*; D053668:Syndecan-1; D053667:Syndecans
chemical_list: D000911:Antibodies, Monoclonal; D014408:Biomarkers, Tumor; D008562:Membrane Glycoproteins; D011509:Proteoglycans; C508241:SDC1 protein, human; D053668:Syndecan-1; D053667:Syndecans