title: Psoriasin, a calcium-binding protein with chemotactic properties is present in the third trimester amniotic fluid.
abstract: Psoriasin is a small calcium-binding protein first found in psoriatic lesions and also up-regulated in other inflammatory skin diseases and cancer tissues. Psoriasin is also present in the fetal epithelial cells. Its biological function is unclear, but there is both in vitro and in vivo evidence for its chemokine-like activity. The aim of the present study was to find whether psoriasin could be found in the amniotic fluid and thus could have long-range immunobiological effects. Two recombinant psoriasins were prepared, one in Escherichia coli, the other one in Pichia pastoris. The former was used to produce a rabbit antiserum against psoriasin. Fractionation of full-term amniotic fluids with polyacrylamide gel electrophoresis (PAGE) and gel filtration associated with immunodetection with the antiserum were used to identify a protein compatible with the size of psoriasin. The identity of psoriasin was further verified by mass spectrometric analysis. Expression of psoriasin in cells of the amniotic membranes was detected with nested RT-PCR. Because of its chemokine-like activity, psoriasin present in the amniotic fluid might have consequential immunobiological effects during the fetal development.
authors.affiliation: Department of Clinical Microbiology, University of Kuopio, FIN-70211, Kuopio, Finland.
authors.forename: S
authors.initials: S
authors.lastname: Porre
authors.forename: S
authors.initials: S
authors.lastname: Heinonen
authors.forename: R
authors.initials: R
authors.lastname: Mäntyjärvi
authors.forename: M
authors.initials: M
authors.lastname: Rytkönen-Nissinen
authors.forename: O
authors.initials: O
authors.lastname: Perola
authors.forename: J
authors.initials: J
authors.lastname: Rautiainen
authors.forename: T
authors.initials: T
authors.lastname: Virtanen
mesh_terms: D000650:Amnion / Q000737:chemistry / Q000166:cytology; D000653:Amniotic Fluid / Q000737:chemistry* / Q000378:metabolism; D002135:Calcium-Binding Proteins / Q000032:analysis* / Q000235:genetics / Q000378:metabolism*; D002633:Chemotaxis / Q000502:physiology; D004926:Escherichia coli / Q000235:genetics; D005260:Female; D047109:Fetal Development / Q000502:physiology; D015870:Gene Expression; D006801:Humans; D010843:Pichia / Q000235:genetics; D011247:Pregnancy; D011263:Pregnancy Trimester, Third / Q000378:metabolism; D012333:RNA, Messenger / Q000032:analysis / Q000378:metabolism; D011994:Recombinant Proteins / Q000032:analysis / Q000235:genetics / Q000378:metabolism; D000075023:S100 Calcium Binding Protein A7; D009418:S100 Proteins
chemical_list: D002135:Calcium-Binding Proteins; D012333:RNA, Messenger; D011994:Recombinant Proteins; D000075023:S100 Calcium Binding Protein A7; D009418:S100 Proteins; C089242:S100A7 protein, human