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Berberine, an isoquinoline alkaloid extracted from coptis, exerts anti-proliferation and anticancer properties. Pyruvate kinase M2 (PKM2) is a key enzyme of aerobic glycolysis and considered as the potential anticancer target. However, the inhibition effects and interaction action between Berberine and PKM2 is not well known. In this study, berberine showed antitumor activity of HCT-116 and HeLa cells with the suppression of cell proliferation. Moreover, berberine inhibited the enzyme activity of PKM2 in cancer cells, but had no impact on PKM2 expression. Further research showed that the interaction between berberine and PKM2 was dynamic fluorescence quenching and the main intermolecular force was hydrogen bonding. These findings revealed that berberine may serve as a therapeutic drug for cancer chemotherapy.

Berberine Inhibited the Proliferation of Cancer Cells by Suppressing the Activity of Tumor Pyruvate Kinase M2