Sanguinate's effect on pial arterioles in healthy rats and cerebral oxygen tension after controlled cortical impact.

Autor: Mullah SH; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA. Electronic address: saad.h.mullah.ctr@mail.mil., Abutarboush R; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA. Electronic address: rania.abutarboush.ctr@mail.mil., Moon-Massat PF; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA. Electronic address: paula.f.moon-massat.ctr@mail.mil., Saha BK; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA. Electronic address: biswajit.k.saha.ctr@mail.mil., Haque A; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA. Electronic address: ashraful.haque.ctr@mail.mil., Walker PB; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA. Electronic address: peter.b.walker.mil@mail.mil., Auker CR; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA. Electronic address: charles.r.auker.ctr@mail.mil., Arnaud FG; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA; Uniformed Services University of the Health Sciences, Department of Surgery, Bethesda, MD 20814, USA. Electronic address: francoise.arnaud.ctr@mail.mil., McCarron RM; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA; Uniformed Services University of the Health Sciences, Department of Surgery, Bethesda, MD 20814, USA. Electronic address: richard.m.mccarron.civ@mail.mil., Scultetus AH; Naval Medical Research Center, NeuroTrauma Department, 503 Robert Grant Avenue Silver Spring, MD 20910, USA; Uniformed Services University of the Health Sciences, Department of Surgery, Bethesda, MD 20814, USA. Electronic address: anke.h.scultetus2.ctr@mail.mil.
Jazyk: angličtina
Zdroj: Microvascular research [Microvasc Res] 2016 Sep; Vol. 107, pp. 83-90. Date of Electronic Publication: 2016 Jun 07.
DOI: 10.1016/j.mvr.2016.06.001
Abstrakt: Sanguinate, a polyethylene glycol-conjugated carboxyhemoglobin, was investigated for cerebral vasoactivity in healthy male Sprague-Dawley rats (Study 1) and for its ability to increase brain tissue oxygen pressure (PbtO2) after controlled cortical impact (CCI) - traumatic brain injury (TBI) (Study 2). In both studies ketamine-acepromazine anesthetized rats were ventilated with 40% O2. In Study 1, a cranial window was used to measure the diameters of medium - (50-100μm) and small-sized (<50μm) pial arterioles before and after four serial infusions of Sanguinate (8mL/kg/h, cumulative 16mL/kg IV), volume-matched Hextend, or normal saline. In Study 2, PbtO2 was measured using a phosphorescence quenching method before TBI, 15min after TBI (T15) and then every 10min thereafter for 155min. At T15, rats received either 8mL/kg IV Sanguinate (40mL/kg/h) or no treatment (saline, 4mL/kg/h). Results showed: 1) in healthy rats, percentage changes in pial arteriole diameter were the same among the groups, 2) in TBI rats, PbtO2 decreased from 36.5±3.9mmHg to 19.8±3.0mmHg at T15 in both groups after TBI and did not recover in either group for the rest of the study, and 3) MAP increased 16±4mmHg and 36±5mmHg after Sanguinate in healthy and TBI rats, respectively, while MAP was unchanged in control groups. In conclusion, Sanguinate did not cause vasoconstriction in the cerebral pial arterioles of healthy rats but it also did not acutely increase PbtO2 when administered after TBI. Sanguinate was associated with an increase in MAP in both studies.
(Copyright © 2016 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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