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Steroidal saponins from Asparagus acutifolius
Marc Sautour1, Tomofumi Miyamoto, Marie-Aleth Lacaille-Dubois
1Laboratoire de Pharmacognosie, Unité de Molécules d'Intérêt Biologique, UMIB UPRES-EA 3660, Faculté de Pharmacie, Université de Bourgogne, 7 Bd Jeanne d'Arc, BP 87900, 21079 Dijon Cedex, France.
Phytochemistry
|April 24, 2007
Summary
Six new steroidal saponins were discovered in A. acutifolius roots, with four compounds showing antifungal activity against common human pathogenic yeasts like Candida albicans.
Area of Science:
- Phytochemistry
- Natural Products Chemistry
- Medicinal Chemistry
Background:
- The roots of A. acutifolius L. are a potential source of bioactive natural products.
- Steroidal saponins are a class of compounds known for diverse biological activities.
Purpose of the Study:
- To isolate and characterize new steroidal saponins from A. acutifolius roots.
- To evaluate the antifungal potential of isolated compounds against human pathogenic yeasts.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation via extensive spectroscopic analysis, including 1D and 2D NMR, FABMS, and HRESIMS.
- Antifungal activity testing using broth microdilution assays to determine Minimum Inhibitory Concentrations (MICs).
Main Results:
- Six new steroidal saponins (1-6) and one known spirostanol glycoside (7) were successfully isolated and identified.
- Compounds 4-7 exhibited significant antifungal activity against Candida albicans, Candida glabrata, and Candida tropicalis.
- MIC values for active compounds ranged from 12.5 to 100 microg/ml.
Conclusions:
- The study successfully identified novel steroidal saponins from A. acutifolius.
- Compounds 4-7 possess promising antifungal properties, warranting further investigation for therapeutic applications against yeast infections.