Cytotoxic gelsedine-type indole alkaloids from Gelsemium elegans
Hai-Tao Wang1, Yan-Chun Yang2, Xia Mao3
1a Department of E.N.T. , Second Hospital of Jilin University , Changchun 130041 , China.
Journal of Asian Natural Products Research
|July 7, 2017
Summary
Three new gelsedine-type indole alkaloids from Gelsemium elegans were identified. Compounds 1 and 4 showed promising cytotoxic activity against laryngeal tumor cell lines in vitro.
Area of Science:
- Natural Product Chemistry
- Pharmacology
- Medicinal Chemistry
Background:
- Gelsemium elegans is a plant source of bioactive indole alkaloids.
- Gelsedine-type alkaloids represent a significant class with diverse pharmacological properties.
- Laryngeal cancer remains a critical area for therapeutic development.
Purpose of the Study:
- To isolate and characterize new gelsedine-type indole alkaloids from Gelsemium elegans.
- To evaluate the in vitro cytotoxic potential of isolated alkaloids against laryngeal tumor cell lines.
Main Methods:
- Extraction of Gelsemium elegans leaves and branches using ethanol.
- Structure elucidation of isolated compounds using 1D and 2D NMR spectroscopy (1H-1H COSY, HMQC, HMBC) and high-resolution mass spectrometry.
- In vitro cytotoxicity assays against Hep-2, LSC-1, TR-LCC-1, and FD-LSC-1 laryngeal tumor cell lines.
Main Results:
- Three new gelsedine-type indole alkaloids (1-3) and one known alkaloid (4) were isolated.
- Compounds 1 (11-methoxy-14,15-dihydroxyhumantenmine) and 4 (11-methoxy-14-hydroxyhumantenmine) demonstrated cytotoxic activity.
- IC50 values for compounds 1 and 4 ranged from 10.9-12.1 μM and 9.2-10.8 μM, respectively, against all tested cell lines.
Conclusions:
- Gelsemium elegans is a valuable source of structurally novel gelsedine-type indole alkaloids.
- Compounds 1 and 4 possess significant in vitro cytotoxic potential against laryngeal cancer cell lines.
- Further investigation into the mechanism of action and therapeutic potential of these alkaloids is warranted.
