title: Differences in permeability of preterm and term fetal membranes to calcium ions - Preliminary report.
abstract: The metabolic activity of amniochorion contributes to the control of activation of labor-type uterine contractions. The study presents an experimental model of transport of calcium ions across the human amniochorion sampled directly after cesarean section in patients delivering both at term and prematurely. Transmembrane transport of calcium ions was lower in preterm vs. term tissue samples. The differences in permeability were most pronounced in the first 60 min of experiments. The results of the study provide evidence for the existence of an active mechanism of calcium transport which can contribute to regulating the contractility of the uterus.
authors.affiliation: Medical University of Białystok, Department of Reproduction and Gynaecologic Endocrinology, University Hospital, M. Skłodowskiej - Curie 24a, 15-276 Białystok, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Pierzyński
authors.affiliation: Medical University of Białystok, Department of Perinatology, University Hospital, M. Skłodowskiej - Curie 24a, 15-276 Białystok, Poland. Electronic address: urbanrem@gmail.com.
authors.forename: Remigiusz
authors.initials: R
authors.lastname: Urban
authors.affiliation: Medical University of Białystok, Department of Perinatology, University Hospital, M. Skłodowskiej - Curie 24a, 15-276 Białystok, Poland.
authors.forename: Paweł
authors.initials: P
authors.lastname: Kuć
authors.affiliation: Medical University of Białystok, Department of Perinatology, University Hospital, M. Skłodowskiej - Curie 24a, 15-276 Białystok, Poland.
authors.forename: Adam
authors.initials: A
authors.lastname: Lemancewicz
authors.affiliation: Forest Research Institute ul, Park Dyrekcyjny 6, 17-230 Białowieża, Poland.
authors.forename: Elżbieta
authors.initials: E
authors.lastname: Malzahn
authors.affiliation: Medical University of Białystok, Department of Perinatology, University Hospital, M. Skłodowskiej - Curie 24a, 15-276 Białystok, Poland.
authors.forename: Tadeusz
authors.initials: T
authors.lastname: Laudański
mesh_terms: D002118:Calcium / Q000378:metabolism*; D020013:Calcium Signaling / Q000502:physiology; D005321:Extraembryonic Membranes / Q000378:metabolism*; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007477:Ions / Q000378:metabolism; D007752:Obstetric Labor, Premature / Q000378:metabolism; D010539:Permeability; D010865:Pilot Projects; D011247:Pregnancy; D047928:Premature Birth / Q000378:metabolism*; D047929:Term Birth / Q000378:metabolism*
chemical_list: D007477:Ions; D002118:Calcium
keywords: Calcium; Fetal membranes; Permeability; Preterm labor; Uterine contractility