Rodriguez, José LuisAres Lombán, IrmaCastellano Santos, Víctor JesúsMartínez Caballero, MartaMartínez Larrañaga, María RosaAnadón Navarro, Arturo RamónMartínez Caballero, María Aranzazu2024-02-012024-02-012016Rodríguez JL, Ares I, Castellano V, Martínez M, Martínez-Larrañaga MR, Anadón A, Martínez MA. Effects of exposure to pyrethroid cyfluthrin on serotonin and dopamine levels in brain regions of male rats. Environ Res. 2016 Apr;146:388-94. doi: 10.1016/j.envres.2016.01.023. Epub 2016 Jan 29. PMID: 268267750013-935110.1016/j.envres.2016.01.023https://hdl.handle.net/20.500.14352/97701The effects of cyfluthrin oral exposure (1, 5, 10 and 20mg/kg bw, 6 days) on brain region monoamine levels of male rats were examined. Cyfluthrin-treated rats (1, 5 and 10mg/kg bw, orally 6 days), had no visible injury, i.e., no clinical signs of dysfunction were observed. However, rats treated with cyfluthrin at the highest dose (20mg/kg bw, orally 6 days) showed skeletal muscle contraction in the hind limbs, slight movement incoordination without any signs of dyskinesia and tremor after 1-2h of treatment. These signs were reversible at 6h after dose. After last dose of cyfluthrin, dopamine (DA) and serotonin (5-HT) and its metabolites levels were determined in brain regions hypothalamus, midbrain, hippocampus, striatum and prefrontal cortex by HPLC. Cyfluthrin (1mg/kg bw, orally 6 days) did not affect the DA, 5-HT and metabolites levels in the brain regions studied. Cyfluthrin (5, 10 and 20mg/kg bw, orally 6 days) caused a statistically significant decrease in DA and its metabolites DOPAC and HVA levels and in 5-HT and its metabolite 5-HIAA levels in a brain region- and dose-related manner. Moreover, cyfluthrin (20mg/kg bw, orally 6 days) evoked a statistically significant increase in 5-HT turnover in striatum and midbrain, and in DA turnover in striatum and prefrontal cortex. These findings indicate that serotoninergic and dopaminergic neurotransmission is affected by exposure to cyfluthrin and may contribute to the overall spectrum of neurotoxicity caused by this pyrethroidengjournal articlehttps://doi.org/10.1016/j.envres.2016.01.023restricted access615.9CyfluthrinPyrethroidNeurotoxicologyMale ratsMonoaminergic neurotransmittersCiencias Biomédicas3214 Toxicología