title: The long-term effect of sevoflurane on neuronal cell damage and expression of apoptotic factors after cerebral ischemia and reperfusion in rats.
abstract: We investigated the long-term effects of sevoflurane on histopathologic injury and key proteins of apoptosis in a rat hemispheric ischemia/reperfusion model. Sixty-four male Sprague-Dawley rats were randomly assigned to Group 1 (fentanyl and N2O/O2; control) and Group 2 (2.0 vol% sevoflurane and O2/air). Ischemia (45 min) was produced by unilateral common carotid artery occlusion plus hemorrhagic hypotension (mean arterial blood pressure 40 mm Hg). Animals were killed after 1, 3, 7, and 28 days. In hematoxylin and eosin-stained brain sections eosinophilic hippocampal neurons were counted. Activated caspase-3 and the apoptosis-regulating proteins Bax, Bcl-2, Mdm-2, and p53 were analyzed by immunostaining. No eosinophilic neurons were detected in sevoflurane-anesthetized rats over time, whereas 9%-38% of the hippocampal neurons were eosinophilic (days 1-28) in control animals. On days 1 and 3, the concentration of Bax was 140%-200% larger in fentanyl/N2O-anesthetized animals compared with sevoflurane. Bcl-2 was 100% less in control animals during the first 3 days. Activated caspase-3 was detected in neurons of both groups (0.75%-2.2%). These data support a sustained neuroprotective potency of sevoflurane related to reduced eosinophilic injury after cerebral ischemia/reperfusion.
authors.affiliation: Klinik für Anästhesiolgie Klinikum der Johannes Gutenberg-Universität, Langenbeckstrasse 1, 55131 Mainz, Germany. pape@uni-mainz.de
authors.forename: Monika
authors.initials: M
authors.lastname: Pape
authors.forename: Kristin
authors.initials: K
authors.lastname: Engelhard
authors.forename: Eva
authors.initials: E
authors.lastname: Eberspächer
authors.forename: Regina
authors.initials: R
authors.lastname: Hollweck
authors.forename: Kristine
authors.initials: K
authors.lastname: Kellermann
authors.forename: Susanne
authors.initials: S
authors.lastname: Zintner
authors.forename: Peter
authors.initials: P
authors.lastname: Hutzler
authors.forename: Christian
authors.initials: C
authors.lastname: Werner
mesh_terms: D018685:Anesthetics, Inhalation / Q000494:pharmacology*; D000818:Animals; D051017:Apoptosis Regulatory Proteins / Q000378:metabolism*; D001783:Blood Flow Velocity; D002545:Brain Ischemia / Q000378:metabolism* / Q000473:pathology* / Q000503:physiopathology; D053148:Caspase 3; D020169:Caspases / Q000378:metabolism; D002452:Cell Count; D002560:Cerebrovascular Circulation; D004789:Enzyme Activation; D006624:Hippocampus / Q000378:metabolism / Q000473:pathology*; D007150:Immunohistochemistry; D008297:Male; D008738:Methyl Ethers / Q000494:pharmacology*; D009474:Neurons / Q000378:metabolism / Q000473:pathology*; D018696:Neuroprotective Agents / Q000494:pharmacology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D015427:Reperfusion Injury / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology / Q000517:prevention & control; D000077149:Sevoflurane
chemical_list: D018685:Anesthetics, Inhalation; D051017:Apoptosis Regulatory Proteins; D008738:Methyl Ethers; D018696:Neuroprotective Agents; D000077149:Sevoflurane; C505410:Casp3 protein, rat; D053148:Caspase 3; D020169:Caspases