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Título: | The role of serotonergic signaling on phototactic and locomotor behavior in Daphnia magna |
Autor: | Gómez-Canela, Cristian CSIC ORCID; Esquius, Ferran; Barata Martí, Carlos CSIC ORCID | Palabras clave: | Serotonin Behavior Daphnia Fish kairomones Fluoxetine Phototaxis |
Fecha de publicación: | 27-sep-2022 | Editor: | Elsevier | Citación: | Science of The Total Environment 856, Part 2: 159042 (2022) | Resumen: | The role of serotonin in Daphnia magna phototactic and locomotor behavior was assessed using reverse genetics and pharmacological treatments with serotonin and fluoxetine. The study was conducted with four clones: the wild type clone and three CRISPR D. magna ones with mutations in the tryptophan hydrolase gene (TRH) that is involved in serotonin synthesis. These included clones TRHA- and TRHB- with mutations in both alleles that lack serotonin and the mono-allelic mutant TRH+, that has serotonin. Obtained results indicated that animals lacking serotonin showed an increased negative phototactism and locomotor activity upon light stimuli and a reduced response to fish kairomones relative to the wild type and TRH+ individuals. Exposure to exogenous serotonin re-established the phototactism and locomotor activity of TRH- individuals to those of the wild type but did not affect phototactic responses to fish kairomones. Unexpectedly, fluoxetine was able to modify locomotor activity and phototactic behavior against fish kairomones in TRH- individuals lacking serotonin, and also it increased the concentrations of acethylcholine and GABA in exposed animals, which support the argument that fluoxetine may also affect other neurological pathways. | Versión del editor: | https://doi.org/10.1016/j.scitotenv.2022.159042 | URI: | http://hdl.handle.net/10261/281520 | DOI: | 10.1016/j.scitotenv.2022.159042 | ISSN: | 00489697 |
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