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Investigation of the Role of Stimulation and Blockade of 5-HT7 Receptors in Ketamine Anesthesia.

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Abstract

Although several pieces of evidence have indicated the ability of the serotonin-7 receptor (5-HTR7) to modulate N-methyl-D-aspartate receptor (NMDAR) activation, the possible impact on ketamine anesthesia has not been examined directly. The purpose of the present study is thus to investigate the possible role of the 5-HTR7 in ketamine anesthesia using a 5-HTR7 agonist and/or antagonist. The influence of a 5-HTR7 agonist/antagonist on ketamine anesthesia for behavioral impact was assessed by testing potential anesthetic parameters. Its functional impact was assessed by mRNA expression with real-time PCR and immunostaining in the hippocampus and prefrontal cortex of mice. Two different doses of ketamine—high and low—were administered to induce anesthesia. In the high-dose ketamine-applied group in particular, the administration of both the 5-HTR7 agonist and antagonist intensified the anesthetic effect of ketamine. The reflection of the change in anesthesia parameters to 5-HTR7 expression was observed as an increase in the hippocampus and a decrease in the prefrontal cortex in the anesthetized groups by stimulation of 5-HTR7. It is noteworthy that the results of NMDAR expressions are parallel to the results of the 5-HTR7 expressions of both the hippocampus and the prefrontal cortex. The 5-HTR7 may play a role in ketamine anesthesia. It may act through NMDAR in ketamine anesthesia, depending on the parallelism between both receptors.

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Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors. This study is derived from Busra DINCER's PhD thesis

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Correspondence to Elif Cadirci.

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Dincer, B., Halici, Z. & Cadirci, E. Investigation of the Role of Stimulation and Blockade of 5-HT7 Receptors in Ketamine Anesthesia.. J Mol Neurosci 71, 1095–1111 (2021). https://doi.org/10.1007/s12031-020-01732-3

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  • DOI: https://doi.org/10.1007/s12031-020-01732-3

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