title: Expression of ADAMTS-5/implantin in human decidual stromal cells: regulatory effects of cytokines.
abstract: BACKGROUND
  The restricted expression of ADAMTS-5 (A Disintegrin And Metalloproteinase with ThromboSpondin repeats-5) to the maternal-fetal interface in mice has led to this novel metalloproteinase being assigned the trivial name 'implantin'.
  
  
  METHODS
  As a first step in determining whether ADAMTS-5 also contributes to the implantation process in humans, we have examined the spatiotemporal expression of this ADAMTS subtype in the endometrium during the menstrual cycle and pregnancy by immunohistochemical analysis. A quantitative competitive PCR (QC-PCR) strategy and western blotting were subsequently used to determine whether interleukin (IL)-1beta and transforming growth factor (TGF)-beta1, two cytokines involved in the formation of the maternal-fetal interface, were capable of regulating ADAMTS-5 messenger RNA (mRNA) and protein levels in primary cultures of stromal cells isolated from first trimester decidual tissues.
  
  
  RESULTS
  ADAMTS-5 expression in the stroma of the human endometrium correlates with decidualization of this cellular compartment in vivo. IL-1beta was found to increase (P < 0.05) whereas TGF-beta1 decreased (P < 0.05) ADAMTS-5 mRNA and protein levels in decidual stromal cell cultures in a concentration- and time-dependent manner. These regulatory effects were attenuated by function-perturbing antibodies directed against either cytokine.
  
  
  CONCLUSIONS
  ADAMTS-5 expression is restricted to decidualized stromal cells of the human endometrium in vivo and is subject to regulation by cytokines in vitro.
authors.affiliation: Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, BC, Canada.
authors.forename: H
authors.initials: H
authors.lastname: Zhu
authors.forename: P C K
authors.initials: PC
authors.lastname: Leung
authors.forename: C D
authors.initials: CD
authors.lastname: MacCalman
mesh_terms: D051722:ADAM Proteins / Q000096:biosynthesis*; D000071116:ADAMTS5 Protein; D003656:Decidua / Q000166:cytology / Q000378:metabolism*; D005260:Female; D018507:Gene Expression Regulation, Developmental; D006801:Humans; D053583:Interleukin-1beta / Q000494:pharmacology*; D008597:Menstrual Cycle; D011247:Pregnancy; D012333:RNA, Messenger / Q000378:metabolism; D017154:Stromal Cells / Q000378:metabolism*; D053773:Transforming Growth Factor beta1 / Q000494:pharmacology*
chemical_list: D053583:Interleukin-1beta; D012333:RNA, Messenger; D053773:Transforming Growth Factor beta1; D051722:ADAM Proteins; D000071116:ADAMTS5 Protein; C121532:ADAMTS5 protein, human