The study of the toxicological profile of dry extracts of narrow-leaved lavender herb
DOI:
https://doi.org/10.24959/nphj.24.151Keywords:
acute toxicity; mice; narrow-leaved lavender; dry extractsAbstract
Aim. To study the acute toxicity of narrow-leaved lavender (Lavandula angustifolia) herb dry extracts of Ukrainian origin.
Materials and methods. The study objects were experimental test samples: test sample No. 1 ‒ a dry extract of narrow-leaved lavender herb obtained by extraction with purified water; test sample No. 2 ‒ a dry extract of narrow-leaved lavender herb obtained by extraction with a water‒ethanol solution (40 % ethanol); test sample No. 3 ‒ a dry extract of narrow-leaved lavender herb obtained by extraction with a water‒ethanol solution (70 % ethanol). To reproduce the clinic of acute poisoning and determine LD50, the acute toxicity of test samples was studied on sexually mature white mice weighing 19-21 g under the conditions of a single intragastric administration. The animals were observed for 2 weeks, which made it possible to assess the toxic effect of the lavender extracts studied on the body of experimental animals. The weight (initial data, 3, 7 and 14 days), the behavior of animals after the introduction of test samples (appearance, respiration, salivation, urination, excreta, feed consumption by animals) were monitored by daily feed and water consumption ‒ on days 7 and 14. The macroscopic examination included the external examination of animals, the examination of internal organs of the chest (heart, lungs, thymus) and abdominal cavities (liver, spleen, kidneys, adrenal glands, testes/ovaries). For statistical processing of the data obtained (body weight), the arithmetic average value and its standard error were used; the reliability of discrepancies between samples was assessed using ANOVA RM and the Dunnet criterion. Comparisons were made with the negative control group. Indicators of the mass coefficients of internal organs were presented in the form of the median, upper and lower quartiles. The reliability of discrepancies between samples was assessed using the Kruskal-Wallis test and the Mann-Whitney test compared to the negative control group.
Results and discussion. It was experimentally proven that intragastric administration of dry extracts from lavender herb in the dose of 5000 mg/kg did not lead to lethality and did not affect the general trophic processes of animals. The macroscopic examination of internal organs and analysis of their mass coefficients confirmed that a single intragastric administration of test samples of lavender extracts did not lead to pathological changes in both males and females. The organ mass coefficients were within the normal range and had no statistically significant differences compared to animals in the negative control group.
Conclusions. The results of the study have demonstrated that a single intragastric administration of test samples of lavender in the dose of 5000 mg/kg does not lead to pathological changes in the physiological state of mice, which allows to attribute the extracts studied to class V of practically non-toxic substances (LD50 > 5000 mg/kg).
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