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Open Access Highly Accessed Research article

Transient filament occlusion of the middle cerebral artery in rats: does the reperfusion method matter 24 hours after perfusion?

Jian-Ren Liu12345*, Ulf R Jensen-Kondering2, Jia-Jun Zhou5, Fen Sun5, Xiao-Yan Feng3, Xiao-Lei Shen3, Günther Deuschl1, Olav Jansen2, Thomas Herdegen4, Johannes Meyne1, Yi Zhao4 and Christoph Eschenfelder16*

Author Affiliations

1 Department of Neurology, University of Schleswig-Holstein, Campus Kiel, Christian-Albrechts-University Kiel, Kiel, Germany

2 Institute of Neuroradiology, University of Schleswig-Holstein, Campus Kiel, Christian-Albrechts-University Kiel, Kiel, Germany

3 Department of Neurology, Shanghai Ninth People's Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Huangpu District, Shanghai, China

4 Institute of Pharmacology, University of Schleswig-Holstein, Campus Kiel, Christian-Albrechts-University Kiel, Kiel, Germany

5 Department of Neurology, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China

6 Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim am Rhein, Germany

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BMC Neuroscience 2012, 13:154  doi:10.1186/1471-2202-13-154

Published: 29 December 2012



There are two widely used transient middle cerebral artery occlusion (MCAO) methods, which differ in the use of unilateral or bilateral carotid artery reperfusion (UNICAR and BICAR). Of the two methods, UNICAR is easier to perform. This study was designed to comprehensively compare the two reperfusion methods to determine if there are any differences in outcomes.


The UNICAR and BICAR groups each included 9 rats. At baseline, the average pO2 was 20.54 ± 9.35 and 26.43 ± 7.39, for the UNICAR and BICAR groups, respectively (P = 0.519). Changes in pO2, as well as other physiological parameters measured within the ischemic lesion, were similar between the UNICAR and BICAR groups during 90 min of MCAO and the first 30 min of reperfusion (all P > 0.05). Furthermore, both the Bederson score and Garcia score, which are used for neurological assessment, were also similar (both P > 0.05). There were also no significant differences in T2WI lesion volume, DWI lesion volume, PWI lesion volume, or TTC staining infarct volume between the two groups (all P > 0.05).


UNICAR and BICAR have similar capability for inducing acute brain ischemic injury and can be considered interchangeable up to 24 hours after reperfusion.

Middle cerebral artery occlusion; Ischemia; Reperfusion method; Bilateral Carotid reperfusion; Unilateral Carotid reperfusion; Neurological deficits; Diffusion weighted imaging; Perfusion weighted imaging; Partial oxygen pressure