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- W285807212 abstract "This study tested the hypothesis that alteration in hypercapnic cerebral blood flow (CBF) reactivity is due to oxygen-derived free radical mediated vascular damage and therefore could be inhibited by treatment with PEG-SOD. Pentobarbital anesthetized piglets were mechanically ventilated and hemodynamically monitored. CBF was measured at PaCO{sub 2} of approximately 25, 40 and 55 mmHg. Reactivity was tested in all piglets prior to and 2 hours following reperfusion from global ischemia. Control piglets received PEG prior to ischemia and at reperfusion. Experimental piglets received either PEG-SOD prior to ischemia and PEG at reperfusion or PEG prior to ischemia and PEG-SOD at reperfusion. During reperfusion cerebral perfusion pressure was maintained constant between groups by intravenous infusion of epinephrine. Pre-ischemic hypercapnic reactivity was not different between groups. At 2 hr reperfusion hypercapnic CBF reactivity in control piglets was diminished to forebrain and brainstem but hypercapnic reactivity was not different than preischemic values in either group receiving PEG-SOD. The authors conclude that administration of PEG-SOD, either prior to or following transient global ischemia, improves recovery of post-ischemic hypercapnic reactivity in piglets. This implicates oxygen-derived free radicals as important mediators of reperfusion injury in brain." @default.
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- W285807212 date "1991-03-15" @default.
- W285807212 modified "2023-09-22" @default.
- W285807212 title "Polyethylene glygol conjugated superoxide dismutase (PEG-SOD) improves recovery of hypercapnia cerebral blood flow (CBF) reactivity following transient global ischemia in piglets" @default.
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