Steroidal constituents in the whole plants of Helleborus niger and their cytotoxic activity in vitro
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Summary
This summary is machine-generated.Phytochemical analysis of Helleborus niger L. yielded novel bufadienolides and ecdysteroids. Several compounds demonstrated significant cytotoxic activity against human leukemia and lung cancer cells, with compound 2 showing potent anti-proliferative and apoptosis-inducing effects.
Area Of Science
- Natural Product Chemistry
- Pharmacology
- Medicinal Chemistry
Background
- Helleborus niger L. is a plant with a history of traditional medicinal use.
- Phytochemical investigations aim to identify bioactive compounds from medicinal plants.
- Understanding the cytotoxic potential of plant-derived compounds is crucial for drug discovery.
Purpose Of The Study
- To isolate and characterize novel compounds from Helleborus niger L.
- To evaluate the cytotoxic activity of isolated compounds against various cancer cell lines.
- To investigate the mechanism of action for potent compounds.
Main Methods
- Phytochemical isolation using chromatographic techniques.
- Structure elucidation via spectroscopic methods (e.g., 2D NMR).
- Cytotoxicity assays against human leukemia (HL-60) and lung cancer (A549, SBC-3) cell lines, and normal lung cells (TIG-3).
Main Results
- Five new compounds (one bufadienolide, two bufadienolide rhamnosides, two ecdysteroids) and eight known compounds were isolated.
- Compounds 1-12 exhibited cytotoxic activity against HL-60, A549, and SBC-3 cells (IC50: 0.0016–6.1 μM).
- Bufadienolide rhamnoside 2 showed potent proliferation inhibition and induced apoptosis in SBC-3 cells; its target is suggested to be Na+,K+-ATPase.
Conclusions
- Helleborus niger L. is a source of bioactive bufadienolides and ecdysteroids.
- Several isolated compounds possess significant cytotoxic potential against cancer cells.
- Compound 2 is a promising candidate for further investigation as an anti-cancer agent targeting Na+,K+-ATPase.
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