title: 31P nuclear magnetic resonance measurements of phosphate metabolites and intracellular pH in turbot Psetta maxima red blood cells using a novel flow method.
abstract: A method for oxygenating and mixing suspensions of turbot Psetta maxima red blood cells (RBC) was tested in (31)P nuclear magnetic resonance (NMR) spectroscopy. In normoxia, the levels of inorganic phosphate (Pi) and nucleoside triphosphates (NTP) were stable up to 140 min and intracellular pH (pHi) was maintained and decreased oxygen partial pressure (P(O ( 2) )) from 30 to 15 and 600 Pa produced a significant fall in the intensity of NTP resonance, balanced by an increase in the Pi signal. Treatment of RBC with 0. 5 M isoproterenol during hypoxia exposure did not affect the pattern of changes in NTP or pHi induced by hypoxia and the effect was manifest only on Pi levels.
authors.affiliation: LEMAR, UMR CNRS 6539, Université de Brest, Institut Universitaire Européen de la Mer, Plouzané, France. Marie-Therese.Thebault@univ-brest.fr
authors.forename: M T
authors.initials: MT
authors.lastname: Thebault
authors.forename: K
authors.initials: K
authors.lastname: Pichavant
authors.forename: N
authors.initials: N
authors.lastname: Kervarec
mesh_terms: D000818:Animals; D019069:Cell Respiration / Q000502:physiology; D004912:Erythrocytes / Q000737:chemistry* / Q000378:metabolism*; D005412:Flatfishes / Q000378:metabolism / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D042541:Intracellular Space / Q000737:chemistry / Q000378:metabolism; D009682:Magnetic Resonance Spectroscopy; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D010710:Phosphates / Q000032:analysis* / Q000378:metabolism; D010759:Phosphorus Isotopes / Q000032:analysis
chemical_list: D010710:Phosphates; D010759:Phosphorus Isotopes