New cytotoxic biflavones from Selaginella doederleinii

Area of Science:

• Natural Product Chemistry
• Medicinal Chemistry
• Pharmacology

Background:

• Selaginella doederleinii is a plant source of bioactive compounds.
• Biflavonoids are a class of natural products with diverse biological activities.
• Investigating plant-derived compounds for potential anticancer agents is crucial.

Purpose of the Study:

• To isolate and characterize new biflavonoids from Selaginella doederleinii.
• To evaluate the cytotoxic potential of isolated compounds against human cancer cell lines.

Main Methods:

• Extraction of Selaginella doederleinii using 75% EtOH.
• Structure elucidation using spectroscopic methods (1D/2D NMR, HRMS, CD).
• In vitro cytotoxicity assays against A549, MCF-7, and SMMC-7721 cell lines.

Main Results:

• Three new biflavones (1-3) and seven known biflavonoids (4-10) were isolated.
• Compound 2, (2S)-2,3-Dihydroametoflavone 5,4 -dimethyl ether, demonstrated significant cytotoxic activity.
• IC50 values for compound 2 ranged from 6.35 to 10.18 μM against tested cancer cell lines.

Conclusions:

• The study successfully identified novel biflavonoid structures from Selaginella doederleinii.
• Compound 2 represents a promising lead for the development of new anticancer therapeutics.
• Further research into the mechanism of action of compound 2 is warranted.