title: Viability of the neonatal rat isolated brainstem preparation by 31P MRS.
abstract: The isolated brainstem-spinal axis from the neonatal rat is an established model for studying neuronal responses of the ventilatory control system, however, its viability has not been clearly established. We studied the brainstem-spinal axis from newborn rats at 8.5 T with 31P NMR spectroscopy. The relative pattern of high energy phosphates (HEPs) was similar to that reported for the in vivo neonatal brain. The average pHi was 0.2 to 0.4 units less than the pHi for the in vivo neonatal brain. The HEPs and pHi were stable for 6 h, suggesting extended in vitro viability.
authors.affiliation: Department of Medicine, Massachusetts General Hospital, Boston 02114.
authors.forename: M D
authors.initials: MD
authors.lastname: Burton
authors.forename: B M
authors.initials: BM
authors.lastname: Hitzig
authors.forename: D C
authors.initials: DC
authors.lastname: Johnson
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D000818:Animals; D000831:Animals, Newborn / Q000502:physiology*; D002545:Brain Ischemia / Q000378:metabolism; D001933:Brain Stem / Q000378:metabolism / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D066298:In Vitro Techniques; D009682:Magnetic Resonance Spectroscopy; D010710:Phosphates / Q000378:metabolism; D010759:Phosphorus Isotopes; D051381:Rats; D013116:Spinal Cord / Q000378:metabolism / Q000502:physiology
chemical_list: D010710:Phosphates; D010759:Phosphorus Isotopes; D000255:Adenosine Triphosphate