Laboratory Animal and Comparative Medicine ›› 2022, Vol. 42 ›› Issue (1): 48-53.DOI: 10.12300/j.issn.1674-5817.2021.095

• Animal Models of Human Diseases • Previous Articles     Next Articles

Comparative Study on the Presentation Effect of Photochemical Method and Wire Embolization Method for Making Focal Cerebral Infarction Model

Huijuan LOU1(), Hongshi ZHANG2, Yufeng WANG3, Meng JIA4, Deyu CONG1,3()   

  1. 1.College of Acupuncture and Tuina, Changchun University of Traditional Chinese Medicine, Changchun 130117, China
    2.School of Nursing, Changchun University of Traditional Chinese Medicine, Changchun 130117, China
    3.Department of Tuina, Affiliated Hospital of Changchun University of Traditional Chinese Medicine, Changchun 130021, China
    4.Changchun New Industry Optoelectronics Technology Co. , Changchun 130103, China
  • Received:2021-05-10 Revised:2021-09-18 Online:2022-02-25 Published:2022-02-25
  • Contact: Deyu CONG

Abstract:

Objective To investigate the two different methods of making animal models of focal cerebral infarction by photochemical method and wire embolization method, and to analyze the correlation between infarct volume and behavior of experimental animals due to different modeling methods. Methods Totally sixty-four male Sprague-Dawley rats of 300-330 g were randomly divided into three groups: normal group, photochemical group and middle cerebral artery occlusion (MCAO) group. The neurological function scores and behavioral tests on the rats were performed 24 hours after surgery. Then brain tissues were removed by anesthesia and execution, and 2,3,5-triphenyltetrazolium chloride (TTC) staining was performed to assess the brain infarct volume in rats. Results There were different volume infarct foci in the brain of SD rats in photochemical group and MCAO group. In MCAO model, most of the hemispheric cortex, striatum, thalamus, hippocampus and subventricular zone were involved in ischemia, and there were good correlations of neurological function scores and balance beam test scores with infarct volumes. In the photochemical model, the infarct foci were in cerebral cortex, and the neurobehavioral abnormalities were well correlated with the cortical infarct location, but the correlation with the infarct volume was relatively poor. Conclusion In MCAO modeling experiment, the behavioral outcomes closely correlated with infarct volume size, while the photochemical model can produce site-specific lesions and site-specific behavioral changed, and the behavioral outcomes have poor correlation with infarct volume.

Key words: Animal model of focal cerebral infarction, Wire embolization method, Photochemical method, Behavior, Infarct volume

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