Polyacetylenes from Saposhnikovia divaricata and their anticancer activity

Area of Science:

• Natural Product Chemistry
• Organic Chemistry
• Pharmacology

Background:

• Saposhnikovia divaricata is a traditional medicinal plant.
• Polyacetylenes are a class of natural compounds with diverse biological activities.

Purpose of the Study:

• To isolate and characterize new polyacetylene compounds from Saposhnikovia divaricata roots.
• To evaluate the cytotoxic effects of isolated compounds against human cancer cell lines.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Structural elucidation using spectroscopic methods (NMR, MS).
• Determination of absolute configurations using quantum chemical calculations (DP4+) and electronic circular dichroism (ECD).
• In vitro cytotoxicity assays against A549 and HEPG2 cell lines.

Main Results:

• Five new polyacetylenes, sadivaethynes E-I (1-5), along with four known compounds, were isolated.
• The structures and absolute configurations of new compounds were determined.
• Compound 9 exhibited moderate cytotoxicity against HEPG2 cells with an IC50 value of 11.66 μM.

Conclusions:

• Saposhnikovia divaricata is a rich source of structurally diverse polyacetylenes.
• Compound 9 shows potential as an anticancer agent, warranting further investigation.