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Anesth Analg 2006;103:173-179
© 2006 International Anesthesia Research Society
doi: 10.1213/01.ane.0000222634.51192.a4

NEUROSURGICAL ANESTHESIA

The Long-Term Effect of Sevoflurane on Neuronal Cell Damage and Expression of Apoptotic Factors After Cerebral Ischemia and Reperfusion in Rats

Monika Pape, MD*, Kristin Engelhard, MD*, Eva Eberspächer, DVM{dagger}, Regina Hollweck{ddagger}, Kristine Kellermann, DVM{ddagger}, Susanne Zintner, DVM{ddagger}, Peter Hutzler, PhD§, and Christian Werner, MD*

From the *Klinik für Anästhesiolgie Klinikum der Johannes Gutenberg-Universität, Mainz, Germany; {dagger}University of California Anesthesia/Critical Patient Care Veterinary Medical Teaching Hospital, Davis, California; {ddagger}Klinik für Anaesthesiologie Technischen Universität München, Klinikum rechts der Isar, and §Institut für Pathologie der GSF, Munich, Germany.

Address correspondence and reprint requests to Monika Pape, MD, Klinik für Anästhesiolgie Klinikum der Johannes Gutenberg-Universität, Langenbeckstraße 1, 55131 Mainz, Germany. Address e-mail to pape{at}uni-mainz.de.

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.




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Lippincott, Williams & Wilkins Anesthesia & Analgesia® is published for the International Anesthesia Research Society® by Lippincott Williams & Wilkins with the assistance of Stanford University Libraries' HighWire Press®. Copyright 2006 by the International Anesthesia Research Society. Online ISSN: 1526-7598   Print ISSN: 0003-2999 HighWire Press
Copyright © 2006 by the International Anesthesia Research Society.