Cytotoxic apigenin derivatives from Chrysopogon aciculatis

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Pharmacology

Background:

• Chrysopogon aciculatis is a plant source of bioactive compounds.
• Apigenin derivatives and flavonoids possess diverse biological activities.
• Understanding the chemical constituents of medicinal plants is crucial for drug discovery.

Purpose of the Study:

• To isolate and characterize new and known compounds from Chrysopogon aciculatis.
• To confirm the natural occurrence of specific compounds.
• To evaluate the cytotoxic potential of isolated compounds against human cancer cell lines.

Main Methods:

• Extraction of Chrysopogon aciculatis using ethanol.
• Isolation of compounds using chromatographic techniques.
• Structure elucidation via spectroscopic methods (e.g., NMR, MS).
• Cytotoxicity assays against MCF-7, H460, HT-29, and CEM cell lines.

Main Results:

• Four novel apigenin derivatives (7-de-O-methylaciculatin, 8-C-β-D-boivinopyranosylapigenin, aciculatinone, 4'-O-glucosylaciculatin) were identified.
• Eight known compounds including apigenin-8-carbaldehyde, kaempferol, tricin, taxifolin, 6,7,4'-trihydroxyflavone, trans-oxyresveratrol, aciculatin, and luteolin-7-sulfate were isolated.
• The natural occurrence of apigenin-8-carbaldehyde and luteolin-7-sulfate was reported for the first time.
• Preliminary evaluation of cytotoxic activity against selected human cancer cell lines was performed.

Conclusions:

• Chrysopogon aciculatis is a rich source of diverse apigenin derivatives and flavonoids.
• The study expands the knowledge of natural product chemistry with new compound discoveries and confirmed natural occurrences.
• Further investigation into the cytotoxic properties of these isolates may lead to potential anticancer drug leads.