To date, herbal medicines are the important source in the development of new drugs to remedy various diseases. However, it is crucial to provide scientific justification of these drugs to determine their side effects in treatments. This study was aimed to evaluate the chemical composition, acute and subacute toxicity of Satureja khuzestanica essential oil (SKEO) in a mice model. Plant materials of S. khuzestanica were collected from the rural regions of Lorestan Province, west of Iran. Gas chromatography/mass spectrometry (GC/MS) analysis was performed to determine the main components of SKEO. To assess the acute toxicity, 0.5, 1, 2 and 4 ml/kg doses of SKEO were injected intraperitoneally into four groups of six mice. The number of deaths was counted at 24 h after the treatment. Sub-acute toxicity of the effects of SKEO was evaluated by determine the clinical chemistry and hematological parameters of the treated mice after oral administration of SKEO at the doses of 0.2, 0.4 and 0.6 ml/kg, respectively, for 14 consecutive days. Twenty-three compounds were identified in SKEO by GC/MS analysis, in which the main component was carvacrol (64.4%). The LD50 value of intraperitoneal injection of SKEO was 1.79 ml/kg and the maximum nonfatal dose was 1.13 ml/ kg. No death was observed at the doses of 0.2 and 0.4 ml/kg, while in the group receiving 0.8 ml/kg of SKEO, only one mouse died (12.5%). There was no significant difference between the biochemical and hematological parameters following the oral administrations of SKEO at the used doses of 0.2, 0.4 and 0.8 ml/ kg and the controls (P>0.05). The obtained results in this work showed that SKEO at the tested doses had no significant toxicity on the liver and kidney tissues as well as on the hematological parameters in the mice. Therefore, SKEO could be safe for the mammalian host at the used doses.
Background: Toxoplasma gondii is a widespread zoonotic protozoan that infects approximately one third of the global human population and all other warm-blooded animals. The present study aims to evaluate the prophylactic effects of Satureja khuzestanica essential oil (SKEO) on infected mice with acute toxoplasmosis. Materials and Methods:The components of the SKEO were identified by gas chromatography/mass spectroscopy (GC/MS). To evaluate the prophylactic effects of SKEO, mice were divided into four groups. (i) non-treated group, (ii) mice treated with olive oil once a day for two weeks, (iii) mice treated with SKEO at the dose of 0.2ml/kg once a day for two weeks, (iv) and mice orally treated with SKEO at the dose of 0.3 ml/kg once a day for two weeks. After 24 h (fifteenth day) mice in the groups of two-four were infected intraperitonealy with 10 -4 tachyzoite of T. gondii, RH strain. The mortality rate in all infected mice and the number of tachyzoites from infected mice were recorded. Results: The main components of SKEO were carvacrol (78.8%), thymol (7.5%), and beta-Bisabolene (1.2%). Findings of prophylactic effects revealed that mortality rate of infected mice was 8 days after oral administration of SKEO at the concentration of 0.2 and 0.3ml/kg (P<0.05). In contrast, this value for control group was 5 days. In addition, SKEO significantly reduced the mean number of tachyzoites compared with control group (P<0.05). No significant difference (P>0.05) was observed in the clinical chemistry and hematological parameters following oral administrations of SKEO at the doses of 0.2 and 0.3 ml/kg for 14 days. Conclusion:The results showed the potential of SKEO as a natural source for the production of new prophylactic agent for use in toxoplasmosis.
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