Objective:To investigate potential antioxidant,antimicrobial,cytotoxic and analgesic activities of ethanolic extract of Mentha arrensis l.,in different in vivo and in vitro experimental models.Methods:In vitro DPPH ra...Objective:To investigate potential antioxidant,antimicrobial,cytotoxic and analgesic activities of ethanolic extract of Mentha arrensis l.,in different in vivo and in vitro experimental models.Methods:In vitro DPPH radical scavenging assay was used to evaluate the antioxidant activity of the plant extract.In vivo analgesic activity was carried out by acetic acid—induced writhing test in Swiss albino mice.All studies in mice were undertaken at the doses of 250 and 500 mg/kg body weight.Antibacterial activilv was studied by disk diffusion assay against some Gram—positive and Gram—negative bacterial strains.Brine shrimp lethality assay was used to investigate cyloloxicity effects of the plant extract.Results:The extract showed free radical scavenging activity in the DPPH assay(IC<sub>50</sub><sup>4</sup>1 μg/mL)compared to the standard antioxidant ascorbic acid(IC<sub>50</sub><sup>1</sup>9 μg/mL).The extract also produced prominent antimicrobial activity against Salmonella typhi.Salmonella paratyphi.Shigella boydii,Streptococcus pyogenes and Streptococcus aureus compared to standard drug kanamycin at the dose of 30 μg/disc.The extract exhibited lethality against the brine shrimp nauplii with the LC<sub>50</sub>,values of 40 μg/mL.and also 90%mortality(LC<sub>90</sub>) value was found to be 160 μg/mL.In analgesic test.the extract demonstrated statistically significant（P【0.01） analgesic effect in acetic acid induced writhing in white albino mice al both dose levels.Conclusions:These results suggest that the ethanolic extract of Mentha arvenns L.has potential antioxidant,antibacterial,cytotoxic and analgesic activities that support the ethnopharmacological uses of this plant.展开更多
The purpose of this work was to evaluate the effects of different phosphorus levels (0.05, 0.5, 1 and 2 mM) under nitrogen metabolism and the essential oil profile of menthol mint (Mentha arvensis L.). The relationshi...The purpose of this work was to evaluate the effects of different phosphorus levels (0.05, 0.5, 1 and 2 mM) under nitrogen metabolism and the essential oil profile of menthol mint (Mentha arvensis L.). The relationship between the leaf maturity and the essential oil profile was also explored. The experiment was conducted in a hydroponic system located in a grow chamber during 41 days and after the harvest, nitrate reductase activity, and the -N, amino-N, and soluble sugars levels of each plant part were evaluated. Also the essential oil from young leaves (6th to 8th node) and adult leaves (3rd to the 5th node) was analyzed. An uptake mechanism related to the increase in fresh weight of the roots was promoted with the use of low P levels (0.05 and 0.50 mmol·L-1). With 1 mmol·L-1 P plants showed in all parts an increased nitrate reductase activity and high levels of nitrate and amino-N in leaves. Plants submitted to the lowest P level (0.05 mmol·L-1) presented high levels of menthol. In leaves from 6th to 8th node (mature leaves) menthol level was approximately 87% of the essential oil however leaves from the 3rd to the 5th node (young leaves) showed high levels of pulegone, that can be toxic for humans. The results indicate that the essential oil quality in menthol mint is influenced by the leaf maturity and the P levels. Also it was showed that the oil extracted from mature leaves of plants under low P levels has the best commercial profile.展开更多
基金Supported by Pharmacy Discipline.Life Science School,Khulna University(Grant No.Kt:PHRM:2012/April-081134)
文摘Objective:To investigate potential antioxidant,antimicrobial,cytotoxic and analgesic activities of ethanolic extract of Mentha arrensis l.,in different in vivo and in vitro experimental models.Methods:In vitro DPPH radical scavenging assay was used to evaluate the antioxidant activity of the plant extract.In vivo analgesic activity was carried out by acetic acid—induced writhing test in Swiss albino mice.All studies in mice were undertaken at the doses of 250 and 500 mg/kg body weight.Antibacterial activilv was studied by disk diffusion assay against some Gram—positive and Gram—negative bacterial strains.Brine shrimp lethality assay was used to investigate cyloloxicity effects of the plant extract.Results:The extract showed free radical scavenging activity in the DPPH assay(IC<sub>50</sub><sup>4</sup>1 μg/mL)compared to the standard antioxidant ascorbic acid(IC<sub>50</sub><sup>1</sup>9 μg/mL).The extract also produced prominent antimicrobial activity against Salmonella typhi.Salmonella paratyphi.Shigella boydii,Streptococcus pyogenes and Streptococcus aureus compared to standard drug kanamycin at the dose of 30 μg/disc.The extract exhibited lethality against the brine shrimp nauplii with the LC<sub>50</sub>,values of 40 μg/mL.and also 90%mortality(LC<sub>90</sub>) value was found to be 160 μg/mL.In analgesic test.the extract demonstrated statistically significant（P【0.01） analgesic effect in acetic acid induced writhing in white albino mice al both dose levels.Conclusions:These results suggest that the ethanolic extract of Mentha arvenns L.has potential antioxidant,antibacterial,cytotoxic and analgesic activities that support the ethnopharmacological uses of this plant.
文摘The purpose of this work was to evaluate the effects of different phosphorus levels (0.05, 0.5, 1 and 2 mM) under nitrogen metabolism and the essential oil profile of menthol mint (Mentha arvensis L.). The relationship between the leaf maturity and the essential oil profile was also explored. The experiment was conducted in a hydroponic system located in a grow chamber during 41 days and after the harvest, nitrate reductase activity, and the -N, amino-N, and soluble sugars levels of each plant part were evaluated. Also the essential oil from young leaves (6th to 8th node) and adult leaves (3rd to the 5th node) was analyzed. An uptake mechanism related to the increase in fresh weight of the roots was promoted with the use of low P levels (0.05 and 0.50 mmol·L-1). With 1 mmol·L-1 P plants showed in all parts an increased nitrate reductase activity and high levels of nitrate and amino-N in leaves. Plants submitted to the lowest P level (0.05 mmol·L-1) presented high levels of menthol. In leaves from 6th to 8th node (mature leaves) menthol level was approximately 87% of the essential oil however leaves from the 3rd to the 5th node (young leaves) showed high levels of pulegone, that can be toxic for humans. The results indicate that the essential oil quality in menthol mint is influenced by the leaf maturity and the P levels. Also it was showed that the oil extracted from mature leaves of plants under low P levels has the best commercial profile.
