Canine distemper virus induces downregulation of GABAA,GABAB, and GAT1 expression in brain tissue of dogs


The aim of the study was to determine the expression profiles of GABAA, GABAB, and GAT1 using RT-PCR and the immunoreactivity of GAT1 via immunohistochemical and immunofluorescence assays in CDV-infected brain tissue of dogs. For this purpose, dogs with CDV and dogs without CDV were selected. The mRNA transcript levels of GABAA, GABAB, and GAT1 were significantly downregulated in brain tissue in the CDV-infected group as compared with that in non-CDV-infected brain tissue in the control group (p < 0.01, p < 0.001). In addition, the immunoreactivity of GAT1 in CDV-infected brain tissue was significantly lower than in the uninfected group (p < 0.05). We conclude that one of the main causes of myoclonus in CDV infections may be the blockage of postsynaptic inhibition in neurons or a lack of metabolism of GABA. In addition, a GABA neurotransmission imbalance could play a role in demyelination in CDV infections.

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We thank Ataturk University Eastern Anatolia Advanced Technology Application and Research Center (DAYTAM), Prof. Dr. Tolga Güvenç, and Dr. Mustafa Özkaraca for their support. We did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

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SÇ designed and organized the study. SÇ, SÖ and ŞD contributed to the planning, designing and analyses of the experiments, data collection and quality control. SÇ and SÖ performed the statistical analysis. All authors read and approved the final manuscript.

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Correspondence to Selim Çomakli.

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Çomakli, S., Özdemir, S. & Değirmençay, Ş. Canine distemper virus induces downregulation of GABAA,GABAB, and GAT1 expression in brain tissue of dogs. Arch Virol 165, 1321–1331 (2020).

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