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Triterpene glycosides from Astragalus angustifolius
Derya Gülcemal1, Milena Masullo, Erdal Bedir
1Department of Chemistry, Faculty of Science, Ege University, Bornova, Izmir, Turkey.
Planta Medica
|March 23, 2012
Summary
Researchers isolated ten new triterpene glycosides from Astragalus angustifolius Lam. One compound showed weak antiproliferative activity against specific cancer cell lines.
Area of Science:
- Natural Products Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Astragalus angustifolius Lam. is a plant source of bioactive compounds.
- Triterpene glycosides are a class of natural products with diverse biological activities.
Purpose of the Study:
- To isolate and characterize new triterpene glycosides from Astragalus angustifolius Lam.
- To evaluate the antiproliferative activity of the isolated compounds.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation using 1D and 2D-NMR, ESIMS, and HRMS.
- Antiproliferative activity assay against Hela, H-446, HT-29, and U937 cell lines.
Main Results:
- Six new cycloartane-type and four new oleanane-type triterpene glycosides were identified.
- A novel C-24 epimer of cycloastragenol was isolated for the first time.
- Compound 8 exhibited weak antiproliferative activity (IC50 = 36 µM in Hela, 50 µM in HT-29).
Conclusions:
- The study expands the knowledge of triterpene glycosides from Astragalus species.
- The isolated compounds, particularly the novel epimer, warrant further investigation for potential therapeutic applications.