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• W2143669507 abstract "In epilepsy, seizures are generated by abnormal synchronous activity in neurons. In the rat hippocampus (HIP), epileptiform activity has been found to be associated with gap junctions (GJs). GJs are formed by the combination of two hemichannels, each composed of six connexins. At low doses, the convulsive drug 4-aminopyridine (4-AP) produces epileptiform activity without affecting glutamate levels; therefore, GJs could participate in its effect. Based on this argument, in this study, the expression of Cx 32, Cx 36 and Cx 43 protein and mRNA in the HIP of rats treated with 4-AP was evaluated. The evaluation of connexins was carried out by chemifluorescent immunoassay, semiquantitative RT-PCR and immunofluorescence to detect the amount and distribution of connexins and of cellular markers in the HIP and dentate gyrus (DG) of animals treated with NaCl and 4-AP in the right entorhinal cortex. In these animals, convulsive behavior and EEG signals were analyzed.The animals treated with 4-AP showed convulsive behavior and epileptiform activity 60 min after the administration. A significant increase in the protein expression of Cx 32, Cx 36 and Cx 43 was found in the HIP contralateral and ipsilateral to the site of 4-AP administration. A trend toward an increase in the mRNA of Cx 32 and Cx 43 was also found. An increase in the cellular density of Cx 32 and Cx 43 was found in the right HIP and DG, and an increase in the cellular density of oligodendrocytes in the DG and a decrease in the number of cells marked with NeuN were observed in the left HIP.Cx 32 and Cx 43 associated with oligodendrocytes and astrocytes had an important role in the first stages of seizures induced by 4-AP, whereas Cx36 localized to neurons could be associated with later stages. Additionally, these results contribute to our understanding of the role of connexins in acute seizures and allow us to direct our efforts to other new anticonvulsant strategies for seizure treatment." @default.
• W2143669507 created "2016-06-24" @default.
• W2143669507 creator A5001825745 @default.
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• W2143669507 date "2015-08-14" @default.
• W2143669507 modified "2023-10-11" @default.
• W2143669507 title "Analysis of connexin expression during seizures induced by 4-aminopyridine in the rat hippocampus" @default.
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• W2143669507 doi "https://doi.org/10.1186/s12929-015-0176-5" @default.
• W2143669507 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4535691" @default.
• W2143669507 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26268619" @default.
• W2143669507 hasPublicationYear "2015" @default.
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