Revista Brasileira de Farmacognosia
Print version ISSN 0102-695X
FREITAS, Rivelilson Mendes de; SILVA, Fábio de Oliveira; SILVA, Maria Goretti de Vasconcelos and FENG, Dejiang. Antioxidant mechanisms of iso-6-cassine in suppressing seizures induced by pilocarpine. Rev. bras. farmacogn. [online]. 2011, vol.21, n.3, pp.437-443. Epub Mar 25, 2011. ISSN 0102-695X. http://dx.doi.org/10.1590/S0102-695X2011005000043.
The aim of this study was to evaluate the in vitro antioxidant effects of 12-[(2R,5R,6R)-5-hydroxy-6-methylpiperidin-2-yl]dodecan-2-one (iso-6-cassine; ISO) and the anticonvulsant effects of ISO on pilocarpine-induced seizures in rats. Wistar rats were treated with 0.9% saline (i.p., control group), pilocarpine (400 mg/kg, i.p., pilocarpine group), and the association of ISO (1.0 mg/kg, i.p.) plus pilocarpine (400 mg/kg, i.p.), 30 min after administration of ISO (ISO plus pilocarpine group). After the treatments all groups were observed for 1h. The antioxidant effect of ISO on the pilocarpine model was assessed by determining the activity of glutathione peroxidase (GPx), glutathione-S-transferase (GST) and catalase (CAT) as well as the levels of reactive species (RS) and lipid peroxidation (LP). In vitro, ISO (5 μM) reduced RS and LP. ISO (1.0 mg/kg) and abolished seizures and death induced by pilocarpine in rats. ISO protected against the increase in the RS and LP levels, GST activity as well as the inhibition of GPx activity caused by pilocarpine. In addition, ISO increased the catalase activity in hippocampus of seized rats. In conclusion, the dta suggest that ISO can present anticonvulsant and antioxidant properties in the pilocarpine model of seizures in rats.
Keywords : antioxidant; anticonvulsant; oxidative stress; iso-6-cassine; pilocarpine.