Antileishmanial compounds from Moringa oleifera Lam.

Area of Science:

• Pharmacology
• Natural Products Chemistry
• Parasitology

Background:

• Leishmaniasis is a neglected tropical disease caused by Leishmania parasites.
• Current treatments have limitations, necessitating the search for novel therapeutic agents.
• Moringa oleifera is a plant with a history of traditional medicinal uses.

Purpose of the Study:

• To investigate the antileishmanial activity of Moringa oleifera extracts and isolated compounds.
• To identify active phytoconstituents with potential against Leishmania donovani.
• To evaluate the efficacy of these compounds as potential adjuvant therapies.

Main Methods:

• In vitro screening of Moringa oleifera root and leaf extracts against Leishmania donovani promastigotes.
• Fractionation of active extracts to isolate potent compounds.
• Determination of inhibitory concentrations (IC50) for extracts, fractions, and isolated compounds.
• Chemical characterization of the most active antileishmanial compound.

Main Results:

• The methanolic leaf extract exhibited moderate antileishmanial activity (IC50 = 47.5 microg/ml).
• Fractionation enhanced activity, with the ethyl acetate fraction showing an IC50 of 27.5 microg/ml.
• Niazinin, a thiocarbamate glycoside, was identified as the most potent compound (IC50 = 5.25 microM).

Conclusions:

• Moringa oleifera extracts possess significant antileishmanial properties.
• Niazinin is a highly active compound against Leishmania donovani.
• Moringa oleifera derivatives show potential as adjuvant therapies for leishmaniasis.