Antifungal compounds from Zanthoxylum chiloperone var. angustifolium

Area of Science:

• Natural Product Chemistry
• Mycology
• Pharmacognosy

Background:

• Fungal infections pose a significant global health challenge, necessitating the discovery of novel antifungal agents.
• Zanthoxylum species are known sources of bioactive alkaloids with potential medicinal properties.

Purpose of the Study:

• To investigate the antifungal activity of an alkaloidal extract from Zanthoxylum chiloperone var. angustifolium.
• To isolate and identify the specific compounds responsible for the observed antifungal effects.
• To determine the spectrum of activity and minimum inhibitory concentrations (MICs) of the isolated compounds.

Main Methods:

• Extraction of alkaloids from Zanthoxylum chiloperone var. angustifolium stem bark.
• Thin-layer chromatography (TLC) bioautographic method for antifungal screening.
• Bioassay-guided fractionation to isolate active compounds.
• Identification of isolated compounds using spectroscopic methods (implied).
• Determination of MIC values against a panel of fungal strains.

Main Results:

• The alkaloidal extract exhibited antifungal activity against Candida albicans, Aspergillus fumigatus, and Trichophyton mentagrophytes var. interdigitale.
• Two compounds, canthin-6-one and 5-methoxycanthin-6-one, were isolated.
• Canthin-6-one displayed broad-spectrum antifungal activity with MICs ranging from 5.3 to 46 µmol/L against 12 fungal species.
• 5-methoxycanthin-6-one was active against Trichophyton mentagrophytes var. interdigitale with an MIC of 12.3 µmol/L.

Conclusions:

• Canthin-6-one is a potent broad-spectrum antifungal agent with potential for development.
• 5-methoxycanthin-6-one shows specific activity against T. mentagrophytes var. interdigitale.
• The study highlights the potential of Zanthoxylum chiloperone var. angustifolium as a source of novel antifungal compounds.