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Applications of Liquid-Chromatography Tandem Mass Spectrometry in Natural Products Research: Tropane Alkaloids as a Case Study
Published on: March 8, 2024
Cyclopeptide Alkaloids from Ziziphus apetala
Jing Han1, Chang-Jiu Ji, Wen-Jun He
1State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, Yunnan, People's Republic of China.
Journal of Natural Products
|December 14, 2011
Summary
Six new cyclopeptide alkaloids from Ziziphus apetala were identified. Mauritine A demonstrated inhibitory activity against 11β-hydroxysteroid dehydrogenase 1 (11β-HSD1), suggesting potential therapeutic applications.
Area of Science:
- Natural Products Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Ziziphus apetala is a plant species known to produce various alkaloids.
- Cyclopeptide alkaloids represent a significant class of natural products with diverse biological activities.
- 11β-hydroxysteroid dehydrogenase 1 (11β-HSD1) is a key enzyme in metabolic regulation and a target for therapeutic intervention.
Purpose of the Study:
- To isolate and characterize novel cyclopeptide alkaloids from Ziziphus apetala.
- To evaluate the biological activities of isolated compounds and total alkaloids, including antidepressant effects, cytotoxicity, and 11β-HSD inhibition.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation employing spectroscopic analyses (NMR, MS) and chemical methods.
- In vitro assays for antidepressant behavior, cytotoxicity, and 11β-HSD1 inhibition.
Main Results:
- Six new Ia₃-type cyclopeptide alkaloids (1-6) were isolated from Ziziphus apetala stems.
- Mauritine A (7) and mauritine F (8), along with compound 5, were isolated from the roots.
- Mauritine A (7) exhibited significant inhibitory activity against 11β-HSD1 in both human and mouse models.
Conclusions:
- The study successfully identified novel cyclopeptide alkaloids from Ziziphus apetala.
- Mauritine A shows potential as an 11β-HSD1 inhibitor, warranting further investigation for metabolic disorders.
- The findings contribute to the understanding of Ziziphus apetala's chemical constituents and their pharmacological relevance.
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