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Cerebellar Cortex Neurons and Microglia Reaction to Sevoflurane Anesthesia

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Abstract

The cerebellum is a part of the brain that is very sensitive to the toxic effects of general anesthetics. The aim of this work was to evaluate the morphological response of neurons and microgliocytes in all layers of the cerebellar cortex to prolonged (6 h) exposure of sevoflurane (general anesthetic). It was shown that, after prolonged exposure of Wistar male rats to sevoflurane, structural and functional rearrangement were observed in all layers of the cerebellar cortex. In the molecular and ganglion layers the total density of neurons decreased. The number of morphologically altered cells of the molecular layer and Purkinje cells increased to 250 and 300%, respectively, due to both direct toxic effects of the anesthetic and disruption of interneuron connections. In the granular layer, the total density of the neuron population did not change and the number of morphologically altered neurons did not increase significantly. The number of microgliocytes revealed immunohistochemically increased significantly, and activation in response to neuronal death was weakly present. The absence of excessive activation of microgliocytes after prolonged exposure to sevoflurane is a positive result, since neuroinflammatory mediators are produced to a lesser extent and neurons do not experience additional damaging effects from microglia.

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Funding

This work was carried out as part of a state order, state registration no. AAAA-A18-118102590054-0.

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Authors and Affiliations

  1. First Pavlov State Medical University, 197376, St. Petersburg, Russia

    G. Yu. Yukina, E. G. Sukhorukova, I. V. Belozertseva, Yu. S. Polushin, V. V. Tomson & A. Yu. Polushin

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  1. G. Yu. Yukina
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  2. E. G. Sukhorukova
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  3. I. V. Belozertseva
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  4. Yu. S. Polushin
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  5. V. V. Tomson
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  6. A. Yu. Polushin
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Corresponding author

Correspondence to G. Yu. Yukina.

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Conflict of interests. The authors declare that they have no conflict of interest.Statement on the welfare of animals. All experiments with animals were performed in accordance with the rules for working with experimental animals according to the principles of the European Convention, Strasbourg, 1986, and the Helsinki Declaration of the World Medical Association on the Humane Treatment of Animals, 1996.

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Translated by I. Fridlyanskaya

Abbreviations: CG—control group, EG—experimental group.

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Yukina, G.Y., Sukhorukova, E.G., Belozertseva, I.V. et al. Cerebellar Cortex Neurons and Microglia Reaction to Sevoflurane Anesthesia. Cell Tiss. Biol. 13, 439–445 (2019). https://doi.org/10.1134/S1990519X19060105

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  • DOI: https://doi.org/10.1134/S1990519X19060105

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