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pubmed-article:2843655pubmed:abstractTextThis study examines the effects of complement activation and of complement-induced oxygen radical production on the principal determinant of hepatic function, i.e., effective hepatic blood flow (EHBF). Female Sprague-Dawley rats received cobra venom factor, 40 units/kg, in two divided doses at 30-minute intervals. At t = 2 hours, thermodilution cardiac output, mean arterial pressure, heart rate, hematocrit, and EHBF by galactose clearance were determined. Complement activation produced a significant depression in EHBF independent of changes in systemic perfusion. To determine whether oxygen radicals participated in the insult, additional animals were pretreated with superoxide dismutase, 6 mg/kg, plus catalase, 15 mg/kg, immediately before complement activation. Concomitant treatment with the oxygen radical scavengers attenuated the degree of complement-induced hepatic ischemia, again independent of effects on systemic perfusion. This study suggests that the reduction in hepatic blood flow that accompanies animal models of trauma and sepsis may result, in part, from the sequelae of complement activation with oxygen radicals as secondary mediators.lld:pubmed
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pubmed-article:2843655pubmed:pagination1295-300lld:pubmed
pubmed-article:2843655pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:2843655pubmed:articleTitleContribution of toxic oxygen intermediates to complement-induced reductions in effective hepatic blood flow.lld:pubmed
pubmed-article:2843655pubmed:affiliationDepartment of Surgery, Veterans Administration Medical Center, Cleveland, OH 44106.lld:pubmed
pubmed-article:2843655pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:2843655pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
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