Induction of apoptosis by Eurycoma longifolia jack extracts.

Area of Science:

• Phytochemistry
• Pharmacology
• Cancer Biology

Background:

• Eurycoma longifolia possesses diverse bioactivities, including cytotoxic effects.
• Human breast cancer cell line MCF-7 is a common model for breast cancer research.
• Understanding plant-derived compounds for cancer treatment is crucial.

Purpose of the Study:

• To investigate the antiproliferative effects of Eurycoma longifolia root extracts and fractions on MCF-7 cells.
• To identify and characterize active compounds responsible for cytotoxicity.
• To elucidate the mechanism of action, including apoptosis induction and protein modulation.

Main Methods:

• Bioassay-guided fractionation of Eurycoma longifolia root extracts.
• In vitro cytotoxicity assays using MCF-7 and MCF-10A cell lines.
• Apoptosis assays (TUNEL, nuclear morphology) and Western blotting for protein expression (Bcl-2, Bax).

Main Results:

• E. longifolia extracts and fractions demonstrated direct antiproliferative activity against MCF-7 cells.
• Fraction F16 showed significant cytotoxicity towards MCF-7 cells with selectivity over normal breast cells (MCF-10A).
• F16 induced apoptosis in MCF-7 cells and down-regulated the anti-apoptotic Bcl-2 protein without affecting Bax.

Conclusions:

• Eurycoma longifolia root extract F16 exhibits potent antiproliferative effects on human breast cancer cells.
• F16 induces apoptosis in MCF-7 cells, mediated by the modulation of Bcl-2 protein expression.
• These findings suggest Eurycoma longifolia as a potential source for novel breast cancer therapeutics.