4.3 Article

Induction of Apoptosis in Human Hepatocarcinoma SMMC-7721 Cells In Vitro by Psoralen from Psoralea corylifolia

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CELL BIOCHEMISTRY AND BIOPHYSICS
卷 70, 期 2, 页码 1075-1081

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HUMANA PRESS INC
DOI: 10.1007/s12013-014-0025-2

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Psoralen; SMMC-7721 cell; Apoptosis; Caspase-3; p53; Bax; Bcl-2

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Psoralen is a major active component of Psoralea corylifolia. In the present study, we analyzed psoralen-induced changes in human hepatocarcinoma cell viability and apoptosis, and investigated the underlying mechanisms of the proapoptotic effect of the compound on SMMC-7721 cells. We measured human hepatocarcinoma cell viability by MTT assay and Annexin V-FITC/PI double staining, and evaluated the activity of caspase 3 and the expression of p53, Bax, and Bcl-2 proteins, involved in regulating cell apoptosis. Psoralen was able to inhibit the growth of SMMC-7721 cells in a dose-and time-dependent manner and had a strong proapoptotic effect on these cells. We show a dose-dependent increase in caspase-3 activity, and elevated levels of p53 and Bax proteins in psoralen-treated cells, that coincided with dose-dependent decrease in Bcl-2 expression. These results suggest that psoralen induces apoptosis in cancer cells via mechanisms that involve caspase-3, p53, Bax, and Bcl-2 pathway. Our results may provide a molecular basis for the further development of natural compounds as novel anticancer agents for human hepatomas.

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