Bioactive compounds from Rhodiola rosea (Crassulaceae)

Area of Science:

• Phytochemistry
• Pharmacology
• Natural Products

Background:

• Rhodiola rosea is a medicinal plant with a history of traditional use.
• Its extracts are known to possess various biological activities.
• Investigating specific compounds for targeted therapeutic potential is crucial.

Purpose of the Study:

• To isolate and identify bioactive compounds from Rhodiola rosea.
• To evaluate the antibacterial activity of isolated compounds against Staphylococcus aureus.
• To assess the cytotoxic effects of these compounds on prostate cancer cells.

Main Methods:

• Bioactivity-guided fractionation of Rhodiola rosea extracts.
• Structure elucidation using spectroscopic techniques (UV, IR, MS, NMR).
• Determination of minimum inhibitory concentrations (MICs) for antibacterial activity.
• Cytotoxicity assays (IC50 values) against prostate cancer cell lines.

Main Results:

• Five compounds were isolated: gossypetin-7-O-L-rhamnopyranoside (1), rhodioflavonoside (2), gallic acid (3), trans-p-hydroxycinnamic acid (4), and p-tyrosol (5).
• Compounds 1 and 2 showed significant activity against Staphylococcus aureus with MICs of 50 µg/mL and 100 µg/mL, respectively.
• Compounds 1 and 2 exhibited cytotoxicity against a prostate cancer cell line with IC50 values of 50 µg/mL and 80 µg/mL, respectively.

Conclusions:

• Gossypetin-7-O-L-rhamnopyranoside and rhodioflavonoside are bioactive constituents of Rhodiola rosea.
• These compounds possess notable antibacterial properties against Staphylococcus aureus.
• The isolated compounds also demonstrate promising anticancer activity against prostate cancer cells, warranting further investigation.