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- W2521142983 abstract "Depression has been linked to disruption in the cerebral levels of specific neurotransmitters. L-tyrosine is a precursor of more than one of the neurotransmitters affected by depression. Even though setbacks of monoamines precursors include high doses and low efficiency, many studies have suggested using L-tyrosine as antidepressant.The purpose of this study was to explore the possible antidepressant effect of L-tyrosine loaded in a nanoparticle-designed formula, using behavioral tests in acute and chronic mild stress (CMS) models of depression in rats.Animals from both models received L-tyrosine-loaded nanoparticles (5 or 10 mg/kg), L-tyrosine solution (10 mg/kg), fluoxetine (10 mg/kg) or placebo daily for 21 days. Rats from the acute stress model of depression were subjected to open field and forced swim tests (FSTs). For the CMS model, sucrose preference test was carried out. Additionally, 3 profiles of the nanoparticles formula were tested in vitro. High dissolution rate and entrapment efficiency were obtained from the in vitro tests. Moreover, L-tyrosine-loaded nanoparticles 10 mg/kg and fluoxetine 10 mg/kg significantly decreased the immobility time in the FST, concomitant with restoration of the basal levels of locomotor activity, distance travelled and rearing counts. Also, an increase of the sucrose consumption was recorded in the sucrose preference test after treatment with L-tyrosine-loaded nanoparticles 10 mg/kg and fluoxetine 10 mg/kg.The positive results after treatment with L-tyrosine-loaded nanoparticles, through behavioral tests, are probably attributed to restorating the basal levels of the cerebral noradrenaline.The effects of L-tyrosine administration on the cerebral levels of tyrosine hydroxylase and corticotropin-releasing factor should be further investigated." @default.
- W2521142983 created "2016-09-30" @default.
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- W2521142983 date "2016-01-01" @default.
- W2521142983 modified "2023-09-25" @default.
- W2521142983 title "The Antidepressant Effect of L-Tyrosine-Loaded Nanoparticles: Behavioral Aspects" @default.
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- W2521142983 doi "https://doi.org/10.1159/000443575" @default.
- W2521142983 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5020390" @default.
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