51. Anti-Leishmanial Evaluation of Fraxinus xanthoxyloides (G. Don) DC. Collected from District Islamabad.
- Author
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Younis, Tahira, Khan, Muhammad Rashid, Shah, Naseer Ali, Zai, Jawaid Ahmad, and Khan, Habiba
- Subjects
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ASH (Tree) , *ETHYL acetate , *BIOLOGICAL assay , *STATISTICAL correlation , *QUANTITATIVE research , *THERAPEUTICS - Abstract
In this study, we have investigated phytochemical classes, antileishmanial and cytotoxic activity of Fraxinus xanthoxyloides (Oleaceae) leaves. Powder of F. xanthoxyloides leaves was extracted with methanol to obtain the crude extract (FXM) and the resultant was fractionated with solvents in escalating polarity; n-hexane (FXH), chloroform (FXC), ethyl acetate (FXE), n-butanol (FXB) and the residual aqueous (FXA) fraction. Quantitative estimation of terpenoids, coumarins, flavonoids, phenolics and tannins was conducted. Anti-leishmanial activity was performed against Leishmania tropica promastigote stage parasite while insecticidal activity was assessed through brine shrimps lethality assay. Our results showed the maximum concentration of terpenoids in FXC while the highest quantity of coumarins, flavonoids, phenolics and tannins was recorded in FXE. Presence of terpenoids was not detected in FXB and in FXA. Among the extract/fractions, FXC exhibited the highest anti-leishmanial activity with LD50 of 15.23±0.9 µg/ml to that of glucantime (LD50 = 5.6±2.4 µg/ml) a reference drug. FXH exhibited the anti-leishmanial activity of LD50 = 40.68±1.9 µg/ml followed by FXE (LD50 = 102.9±3.1 µg/ml). Similarly potent insecticidal activity was recorded (LD50 = 28.15±1.8 µg/ml) for FXC followed by FXH (LD50 = 67.59±2.3 µg/ml). However, other fractions exhibited low level of anti-leishmanial and insecticidal activity. Correlation analysis exhibited a strong association (p < 0.05) between the terpenoids and the anti-leishmanial activity and a second but non significant association (p > 0.05) with the insecticidal activity. The coumarins established a medium association with the insecticidal activity. Other chemical classes exhibited a moderate to low level of association with the anti-leishmanial and the insecticidal activity. On the basis of these results we can conclude that chloroform fraction of F. xanthoxyloides is a potential source for anti-leishmanial and insecticidal activities and further studies are required to isolate the active constituents. [ABSTRACT FROM AUTHOR]
- Published
- 2016