Produção Nacional
Revisado por pares
Behavioral effects induced by antitumor cleronade diterpenes from Casearia sylvestris and in silico interactions with neuron receptors
2017; Elsevier BV; Volume: 198; Linguagem: Inglês
10.1016/j.jep.2017.01.006
ISSN1872-7573
AutoresÉverton José Ferreira de Araújo, Antônia Amanda Cardoso de Almeida, Oskar Almeida Silva, Iwyson Henrique Fernandes da Costa, Luís Mário Rezende Júnior, Francisco das Chagas Alves Lima, Alberto José Cavalheiro, Cláudia Pessoa, Manoel Odorico de Moraes, Paulo Michel Pinheiro Ferreira,
Tópico(s)Biological Stains and Phytochemicals
ResumoCasearia sylvestris is a medicinal plant traditionally used to treat snakebites, wounds, inflammation and gastric ulcers and scientific supports for have demonstrated its antitumor, antihyperlipidemic and antiparasitic properties. To assess the effects of a fraction with casearins (FC) on adult mice using classical experimental models of animal behavior and theoretical calculations to verify the interaction of Casearin X (Cas X) with neuron receptors. Animals divided in 6 groups (n=9/group) were intraperitoneally treated with vehicle (DMSO 4%), FC (2.5, 5, 10 and 25 mg/kg/day) and diazepam (2 mg/kg) for 7 days. Thirty minutes after the last dose of treatment, acute toxicity and behavioral experiments were performed. The highest dose of FC (25 mg/kg/day) caused diarrhea, weight loss and death of one animal. Elevated plus maze test showed that lower doses [2.5 mg/kg/day (36.4±5.1 s) and 5 mg/kg/day (43.9±6.2 s)] increased the time spent in open arms (TSOA). Open field test revealed reduction in the number of crossings (54.9%, 51.1%, 48% and 67.7% for 2.5, 5, 10 and 25 mg/kg/day, respectively) in all doses of FC studied and decrease of rearings at 25 mg/kg/day (p<0.05). Computational calculations showed that the inhibition constant (Ki) for the Cas X-D1 complex is up to 1000-fold more favourable than the Cas X-GABAA complex. All ∆G° values obtained for Cas X-D1 complexes were more negative than those seen with Cas X-GABAA complexes. Findings indicate a probable anxiolytic action of the FC since it reduces the number of crossings and rearings and prolonged the time spent in open arms, without sedative and myorelaxant effects, probably due to the interaction of Cas X with dopaminergic system.
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