Colorectal cancer, despite advances in treatment and diagnosis, is one of the most common causes of death from cancer. Conventional anticancer treatment is associated with serious side effects, therefore, new strategies are needed to reduce its toxicity. Natural compound berberine has shown antiproliferative activity against various cancer cells including colon. To investigate antiproliferative effect of berberine in human colorectal adenocarcinoma cells and its ability to potentiate the effect

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... of convenient cytostatics taxol, docetaxel, doxorubicin and cisplatin we used MTT assay and flow cytometry was used to detect its proapoptotic effect and effect on cell cycle. In our experiments we observed significant antiproliferative activity of berberine chloride with IC50= 6.7526 μM. Combination of berberine chloride (1μM) with taxol, docetaxel, doxorubicin and carboplatin significantly increased their antiproliferative activity and decreased their IC50 values. Cell cycle analysis revealed increase in sub-G0 /G1 fraction considered as apoptotic and very mild increase in G0/G1 fraction in berberine chloride (5μM) treated cells. proapoptotic effect of berberine chloride (5μM) was confirmed by Annexin V/PI staining. Based on our results, we can assume that berberine has antiproliferative effect and the combination of berberine with cytostatics could be a promising alternative treatment for cancer. Further studies are necesary to investigate the exact mechanisms of action and drug – drug interactions.