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. 2020 Mar 25;14:219. doi: 10.3389/fnins.2020.00219

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Copyright © 2020 Kesić, Baković, Horvatiček, Proust, Štefulj and Čičin-Šain.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) Serotonin (5HT), its metabolite (5-hydroxyindoleacetic acid, 5HIAA), and their ratio (5HIAA/5HT) measured in whole hypothalamus of animals from low-5HT and high-5HT sublines. Quantification was performed by HPLC-electrochemical method. Values are mean ± SEM, n = 6–7 rats/subline. (B) mRNA expression levels of genes for serotonin transporter (5HTT) and serotonin receptors 5HT1B and 5HT2C, measured in hypothalamus of animals from 5HT sublines by RT-qPCR analysis. Expression levels were normalized to mean of two reference genes (Actb and Gapdh). Results are shown as relative expression ratio between animals from high-5HT and low-5HT subline. Mean ± SEM, n = 9–10 rats/subline.