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Withaferin A is an active component of Withania somnifera, and has anti-inflammatory, anti-tumor, and immune modulatory effects. However, the effects of withaferin A on metalloproteinase (MMP)-9 expression and activity have not been investigated. In this study, we investigated the ability of withaferin A to inhibit MMP-9 expression and activity in PMA-treated human cervical carcinoma Caski cells. Withaferin A markedly inhibited the PMA-induced MMP-9 activity in a dose-dependent manner. Withaferin A decreased not only PMA-induced MMP-9 promoter activity but also PMA-mediated MMP-9 mRNA and protein expression in Caski cells. NF- promoter activity, which is important in MMP-9 expression, was also decreased in combined treatment with withaferin A and PMA. Furthermore, withaferin A markedly suppressed the ability of PMA-mediated migration in Caski cells. Our findings suggest that withaferin A might inhibit PMA-induced migration through the down-regulation of MMP-9 expression and activity.

Withaferin A Inhibits PMA-Induced MMP-9 Expression in Human Cervical Carcinoma Caski Cells