title: Prostaglandin D2 synthase: a component of human amniotic fluid and its association with fetal abnormalities.
abstract: Prostaglandin D2 (PGD2) synthase is responsible for PGD2 production in the brain. Western blot analysis of human amniotic fluid and probing with a polyclonal antibody against prostate-specific antigen (PSA) revealed a strong immunoreactive band with a molecular mass of 25 kDa. The immunoreactive species, which does not react with monoclonal anti-PSA antibodies, was purified to homogeneity from 1 L of amniotic fluid through successive cycles of gel filtration and ion-exchange chromatography. Amino acid sequence analysis (15 cycles) revealed that the protein was highly homologous or identical to PGD2 synthase. On semiquantitative analysis, PGD2 synthase concentration appears to increase dramatically during gestational weeks 12-25 and then declines slowly until term. PGD2 synthase concentration in amniotic fluid was altered in many abnormal pregnancies, most notably its decrease in trisomic fetuses and fetuses with renal abnormalities.
authors.affiliation: Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Canada.
authors.forename: D N
authors.initials: DN
authors.lastname: Melegos
authors.forename: H
authors.initials: H
authors.lastname: Yu
authors.forename: E P
authors.initials: EP
authors.lastname: Diamandis
mesh_terms: D000595:Amino Acid Sequence; D000653:Amniotic Fluid / Q000737:chemistry* / Q000378:metabolism; D000906:Antibodies; D015153:Blotting, Western; D001921:Brain / Q000201:enzymology; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D000013:Congenital Abnormalities / Q000378:metabolism*; D005260:Female; D005865:Gestational Age; D006801:Humans; D019746:Intramolecular Oxidoreductases; D007535:Isomerases / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D007668:Kidney / Q000002:abnormalities; D054834:Lipocalins; D008969:Molecular Sequence Data; D011247:Pregnancy; D017430:Prostate-Specific Antigen / Q000276:immunology / Q000378:metabolism; D014314:Trisomy
chemical_list: D000906:Antibodies; D054834:Lipocalins; D017430:Prostate-Specific Antigen; D007535:Isomerases; D019746:Intramolecular Oxidoreductases; C022466:prostaglandin R2 D-isomerase