title: Transmembrane serine protease TADG-15 (ST14/Matriptase/MT-SP1): expression and prognostic value in ovarian cancer.
abstract: Tumour-associated differentially expressed gene-15 (TADG-15/ST14/matriptase/MT-SP1) is a novel member of the transmembrane serine proteases. Previous studies indicated that TADG-15 is overexpressed in ovarian tumours; however, relationships between expression of TADG-15 and clinical characteristics of ovarian cancer remain unclear. The purpose of this study was to examine TADG-15 expression in ovarian cancers and determine any associations with clinicopathological characteristics or patient survival. Immunohistochemical study revealed that TADG-15 was expressed in 50 (56.2%) of 89 ovarian carcinomas, whereas it was not detected in normal ovaries. TADG-15 expression was significantly more common in patients with early stage disease compared with patients with advanced stage diseases (namely, stage I, 24 out of 33: 72.7%; stage II/III/IV, 26 out of 56: 46.4%; P=0.0157). Kaplan-Meier survival curves demonstrated that patients with TADG-15-positive tumours have had substantially longer survival (P=0.0480). The mean value of relative TADG-15 mRNA expression ratio was significantly higher in stage I tumours than in stage II/III/IV tumours (P=0.0053). Increased expression of TADG-15 is frequently detected in early stage cancers, with expression level downregulated during progression of disease. TADG-15 is associated with early stage ovarian cancer and longer patient survival; therefore, it may be a favourable prognostic marker for this malignancy.
authors.affiliation: Department of Gynecology, Higashi-Hiroshima Medical Center, Higashi-Hiroshima, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Tanimoto
authors.forename: K
authors.initials: K
authors.lastname: Shigemasa
authors.forename: X
authors.initials: X
authors.lastname: Tian
authors.forename: L
authors.initials: L
authors.lastname: Gu
authors.forename: J B
authors.initials: JB
authors.lastname: Beard
authors.forename: T
authors.initials: T
authors.lastname: Sawasaki
authors.forename: T J
authors.initials: TJ
authors.lastname: O'Brien
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D014408:Biomarkers, Tumor / Q000032:analysis*; D002462:Cell Membrane / Q000201:enzymology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008875:Middle Aged; D010051:Ovarian Neoplasms / Q000378:metabolism* / Q000401:mortality / Q000473:pathology*; D010053:Ovary / Q000378:metabolism; D016133:Polymerase Chain Reaction; D011379:Prognosis; D012333:RNA, Messenger / Q000032:analysis; D012697:Serine Endopeptidases / Q000096:biosynthesis*
chemical_list: D014408:Biomarkers, Tumor; D012333:RNA, Messenger; D012697:Serine Endopeptidases; C485596:ST14 protein, human