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Regional blood circulation and microcirculation

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Quality control of the experiment during focal cerebral ischemia in rats by Koidzumi

https://doi.org/10.24884/1682-6655-2014-13-3-74-79

Abstract

Introduction. The quality control of experimental focal cerebral ischemia is one of the most important prerequisites of preclinical studies in rodents. We suggest ultrasound Doppler examination to be useful instrument for cerebral blood flow assessment during MCA occlusion in rats. The aim of our work was to test efficacy of the ultrasound Doppler examination for cerebral blood flow verification during MCA occlusion in rats. Methods. We applied focal cerebral ischemia by Koizumi. All animals were subjected to 30 minutes of MCA occlusion via filament implantation. They were divided in two groups: 1) without ultrasound Doppler examination and 2) with ultrasound Doppler examination. We performed left craniectomy for monitoring the efficacy of ischemia with the help of ultrasound dopplerography («Minimax-Doppler-К» sensor 25 MHz). Brain tissue slices were stained with 2 % triphenyl tetrazolium chloride (TTC) to assess the infarction volume. Results. 20 % of experiments in first group didn't show morphological brain lesion after TTC staining, or infarction spanned the entire MCA territory which is indicative of the lack of reperfusion. There was no significant difference in infarction size between two groups. However, the values were more heterogenous in group 1. Conclusion. By using dopplerography in experimental group we could exclude the animals with severe no-reflow. Ultrasonic dopplerography offers the opportunity of selecting animals, control occlusion extent, and occlusion stability during the ischemia, while the animals with atypical brain blood supply could be excluded. Eventually, it results in better reproducibility of experimental brain ischemia and promote animal saving.

About the Authors

A. A. Shmonin
First Pavlov State Medical University of St. Petersburg; Federal Almazov Medical Research Centre
Russian Federation


A. S. Dayneko
First Pavlov State Medical University of St. Petersburg
Russian Federation


M. S. Prosvirnina
First Pavlov State Medical University of St. Petersburg
Russian Federation


M. E. Kolpakova
First Pavlov State Medical University of St. Petersburg
Russian Federation


A. G. Shumeeva
First Pavlov State Medical University of St. Petersburg
Russian Federation


E. V. Melnikova
First Pavlov State Medical University of St. Petersburg
Russian Federation


T. D. Vlasov
First Pavlov State Medical University of St. Petersburg; Federal Almazov Medical Research Centre
Russian Federation


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Review

For citations:


Shmonin A.A., Dayneko A.S., Prosvirnina M.S., Kolpakova M.E., Shumeeva A.G., Melnikova E.V., Vlasov T.D. Quality control of the experiment during focal cerebral ischemia in rats by Koidzumi. Regional blood circulation and microcirculation. 2014;13(3):74-79. (In Russ.) https://doi.org/10.24884/1682-6655-2014-13-3-74-79

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ISSN 1682-6655 (Print)
ISSN 2712-9756 (Online)