Polyhydroxylated sterols from Monascus purpureus-fermented rice

Area of Science:

• Natural Products Chemistry
• Pharmacology
• Medicinal Chemistry

Background:

• Monascus purpureus is a fungus known for producing bioactive compounds.
• Sterols are a class of organic molecules with diverse biological activities.
• Cancer remains a leading cause of mortality, necessitating the search for novel therapeutic agents.

Purpose of the Study:

• To isolate and characterize new polyhydroxylated sterols from Monascus purpureus.
• To evaluate the cytotoxic activity of these isolated compounds against human cancer cell lines.

Main Methods:

• Extraction of Monascus purpureus using ethanol and ethyl acetate.
• Isolation of compounds using chromatographic techniques.
• Structure elucidation through spectroscopic analysis (NMR, MS).
• Cytotoxicity assays using lung adenocarcinoma (A549) and human ovarian cancer (A2780) cell lines.

Main Results:

• Two new polyhydroxylated sterols were isolated and structurally identified.
• Both compounds exhibited cytotoxic effects against A549 cells with IC50 values of 12.6 μM and 18.5 μM.
• Moderate cytotoxic activity was observed against A2780 cells, with IC50 values of 8.8 μM and 9.4 μM.

Conclusions:

• The isolated polyhydroxylated sterols from Monascus purpureus possess significant cytotoxic potential against lung and ovarian cancer cells.
• These findings warrant further investigation into their mechanism of action and therapeutic applicability.