Adrieli Sachett1, Matheus Gallas-Lopes2, Radharani Benvenutti1, Matheus Marcon3, Amanda M Linazzi2, Gean P S Aguiar4, Ana P Herrmann2,5, J Vladimir Oliveira4,6, Anna M Siebel4, Angelo Piato7,8. 1. Programa de Pós-Graduação Em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. 2. Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil. 3. Departamento de Bioquímica, Farmacologia e Fisiologia, Universidade Federal do Triângulo Mineiro (UFTM), Uberaba, MG, Brazil. 4. Programa de Pós-Graduação em Ciências Ambientais, Universidade Comunitária da Região de Chapecó (Unochapecó), Chapecó, SC, Brazil. 5. Programa de Pós-Graduação em Farmacologia e Terapêutica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. 6. Departamento de Engenharia Química e de Alimentos, Universidade Federal de Santa Catarina (UFSC), Florianópolis, SC, Brazil. 7. Programa de Pós-Graduação Em Neurociências, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS, Brazil. angelopiato@ufrgs.br. 8. Departamento de Farmacologia, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Sarmento Leite, 500/305, Porto Alegre, RS, 90050-170, Brazil. angelopiato@ufrgs.br.
Abstract
BACKGROUND: Curcumin, a polyphenol extracted from the rhizome of Curcuma longa L. (Zingiberaceae), presents neuroprotective properties and can modulate neuronal pathways related to mental disorders. However, curcumin has low bioavailability, which can compromise its use. The micronization process can reduce mean particle diameter and improve this compound's bioavailability and therapeutic potential. METHODS: We compared the behavioral (open tank test, OTT) and neurochemical (thiobarbituric acid reactive substances (TBARS) and non-protein thiols (NPSH) levels) effects of non-micronized curcumin (CUR, 10 mg/kg, ip) and micronized curcumin (MC, 10 mg/kg, ip) in adult zebrafish subjected to a 90-min acute restraint stress (ARS) protocol. RESULTS: ARS increased the time spent in the central area and the number of crossings and decreased the immobility time of the animals in the OTT. These results suggest an increase in locomotor activity and a decrease in thigmotaxis behavior. Both CUR and MC were not able to prevent these effects. Furthermore, ARS also induced oxidative damage by increasing TBARS and decreasing NPSH levels. Both CUR and MC did not prevent these effects. CONCLUSION: ARS-induced behavioral and biochemical effects were not blocked by any curcumin preparation. Therefore, we conclude that curcumin does not have acute anti-stress effects in zebrafish.
BACKGROUND: Curcumin, a polyphenol extracted from the rhizome of Curcuma longa L. (Zingiberaceae), presents neuroprotective properties and can modulate neuronal pathways related to mental disorders. However, curcumin has low bioavailability, which can compromise its use. The micronization process can reduce mean particle diameter and improve this compound's bioavailability and therapeutic potential. METHODS: We compared the behavioral (open tank test, OTT) and neurochemical (thiobarbituric acid reactive substances (TBARS) and non-protein thiols (NPSH) levels) effects of non-micronized curcumin (CUR, 10 mg/kg, ip) and micronized curcumin (MC, 10 mg/kg, ip) in adult zebrafish subjected to a 90-min acute restraint stress (ARS) protocol. RESULTS: ARS increased the time spent in the central area and the number of crossings and decreased the immobility time of the animals in the OTT. These results suggest an increase in locomotor activity and a decrease in thigmotaxis behavior. Both CUR and MC were not able to prevent these effects. Furthermore, ARS also induced oxidative damage by increasing TBARS and decreasing NPSH levels. Both CUR and MC did not prevent these effects. CONCLUSION: ARS-induced behavioral and biochemical effects were not blocked by any curcumin preparation. Therefore, we conclude that curcumin does not have acute anti-stress effects in zebrafish.
Authors: Bruce S McEwen; Nicole P Bowles; Jason D Gray; Matthew N Hill; Richard G Hunter; Ilia N Karatsoreos; Carla Nasca Journal: Nat Neurosci Date: 2015-09-25 Impact factor: 24.884