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- W2147452078 abstract "AimTo examine brain damage following different degrees of acute normovolemic hemodilution combined with controlled hypotension (ANH-CH) by neuronal morphological analysis and investigate the expression of nuclear factor-kappa B (NF-κB) activity and tumor necrosis factor-alpha (TNF-α) in the rat.MethodsForty rats were randomly assigned to receive a sham operation or ANH-CH (with hematocrit 30%, 25%, 20%, and 15%). ANH was performed after baseline physiological parameters had been monitored for 20 minutes. CH was induced 30 minutes later using sodium nitroprusside and mean arterial pressure was maintained at 50-60 mm Hg for 1 hour. Rats were euthanatized 3 and a half hours after operation. TNF-α levels and NF-κB activities in cerebral temporal cortex were measured. Ultrastructural alterations in the CA1 region of the rat hippocampi were observed. Changes in mitochondria were evaluated semiquantitatively.ResultsMarked ultrastructural alterations, such as mitochondrial denaturalization and nucleus distortion, were observed in the CA1 region of the hippocampus in the ANH-CH hematocrit 20% group and ANH-CH hematocrit 15% group. TNF-α expression and NF-κB activity in the cerebral temporal cortex significantly increased in all ANH-CH groups and peaked in the ANH-CH hematocrit 25% group.ConclusionSevere ANH-CH with hematocrit ≤20% may induce cerebral damage and should be avoided. NF-κB activation and TNF-α expression may play a functional role under the ischemic condition. A better understanding of the role of NF-κB and TNF-α in the brain may lead to a novel approach for preventing and treating various neurological disorders." @default.
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- W2147452078 date "2008-02-01" @default.
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- W2147452078 title "Ultrastructural Changes, Nuclear Factor-κB Activation, and Tumor Necrosis Factor-α Expression if Brain AfterAcute Normovolemic Hemodilution and Controlled Hypotension in Rats" @default.
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- W2147452078 doi "https://doi.org/10.3325/cmj.2008.1.22" @default.
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