RESUMO
Teucrium polium (Labiatae) is a plant that widely grows in Iran. Some of species of Teucrium are used for a considerable range of actions in traditional medicine and T. polium has frequently been used as anticonvulsant. In this study, we investigated the protective effects of T. polium ethanolic aqueous extracts and related fractions on seizures induced by pentylenetetrazole (PTZ) and maximal electroshock stimulation (MES). Moreover, presence of alkaloids, terpenoids, tannins and flavonoid contents were evaluated. It was found that aqueous extract (ED50 = 22.4 mg/kg body weight) and related n-butanol fraction (ED50 = 12.6 mg/kg body weight) have antiseizure effects comparing to control groups. There was no difference between preventing of PTZ-induced death and MES-induced hindlimb tonic extension (HLTE) in ethanolic extract comparing to control groups. Our results showed that the amount of flavonoid quantity present in aqueous extract is higher than that of ethanolic extract. These data also showed that the quantity of the flavonoid in n-butanol fraction of aqueous extract is more than other fractions. In conclusion, it was realized that flavonoid rich extracts are more potent than other fractions in showing antiseizure effects.
