• Chao Liang, Zhanggang Xue, and Jing Cang.
• Department of Anesthesiology, Zhongshan Hospital, Fudan University, Shanghai, China.
• J Neurosurg Anesthesiol. 2013 Jul 1;25(3):311-6.

BackgroundTo investigate the protective effects of propofol in brain ischemia/reperfusion injury and the role of heme oxygenase-1 (HO-1) in this process.MethodsSprague-Dawley rats were randomly divided into 9 groups: sham-operated group; middle cerebral artery occlusion (MCAO) group; propofol 10, 20, and 50 mg/kg/h group (propofol 10, 20, 50 mg/kg/h infused at the onset of reperfusion for 30 min), ZnPPIX (a HO-1 activity inhibitor) group (ZnPPIX 20 μmol/kg administered 24 h before MCAO), and the other 3 groups received ZnPPIX followed by 10, 20, and 50 mg/kg/h propofol respectively. At 24 hours of reperfusion, neurological examinations were performed, and after neurological test, brain infarct size and volume, neuronal apoptosis, the level of HO-1 protein expression and HO-1 activity were observed in each group.ResultsPropofol significantly improved neurological deficits, reduced infarct volume, and attenuated neuron apoptosis compared with MCAO group alone. Increased HO-1 protein expression was observed in the ischemic penumbra and core of propofol group after transient MCAO. The selective HO-1 activity inhibitor, ZnPPIX, partially eliminated the neuroprotective effects of propofol.ConclusionsThe neuroprotective effects of propofol postconditioning in brain ischemia/reperfusion injury may be partially through the induction of the HO-1 expression.

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