title: Vasoactive diadenosine polyphosphates in human placenta: possible candidates in the pathophysiology of pre-eclampsia?
abstract: BACKGROUND
  One hypothesis of the pathophysiology of pre-eclampsia is that placentally derived, yet unidentified, vasoactive factors are released into the maternal circulation, causing hypertension.
  
  
  OBJECTIVE
  To determine if diadenosine polyphosphates, new potent vasoconstrictors, are present in human placenta.
  
  
  RESULTS
  Human placental tissue was homogenated and fractionated by size-exclusion chromatography, affinity chromatography, anion-exchange chromatography and reversed-phase chromatography. In fractions purified to homogeneity, diadenosine diphosphate, diadenosine triphosphate, diadenosine tetraphosphate, diadenosine pentaphosphate, diadenosine hexaphosphate and diadenosine heptaphosphate were identified by matrix-assisted laser desorption/ionization mass spectrometry, retention-time comparison and enzymatic cleavage analysis.
  
  
  CONCLUSIONS
  The presence of diadenosine polyphosphates in human placenta makes them possible candidates for involvement in the pathophysiology of pre-eclampsia. However, their contribution to the pathophysiology of eclampsia requires substantiation in further studies.
authors.affiliation: Medizinische Klinik IV, Universitätsklinikum Benjamin Franklin, Freie Universität Berlin, Germany.
authors.forename: J
authors.initials: J
authors.lastname: Jankowski
authors.forename: M S
authors.initials: MS
authors.lastname: Yoon
authors.forename: N
authors.initials: N
authors.lastname: Stephan
authors.forename: W
authors.initials: W
authors.lastname: Zidek
authors.forename: H
authors.initials: H
authors.lastname: Schlüter
mesh_terms: D001808:Blood Vessels / Q000502:physiology; D002845:Chromatography / Q000379:methods; D015226:Dinucleoside Phosphates / Q000378:metabolism* / Q000502:physiology; D005260:Female; D006801:Humans; D010920:Placenta / Q000378:metabolism*; D011225:Pre-Eclampsia / Q000209:etiology; D011247:Pregnancy; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
chemical_list: D015226:Dinucleoside Phosphates