Abstract
The issue of toxicity associated with existing cancer drugs necessitates the exploration of the anticancer potentials of natural products such as caffeic acid (CA). Here, we determined the effect of CA on the proliferation, migration, and stem cell-like properties of DU-145 prostate cancer cells. Tetrazolium-based colorimetric assay and flow cytometric analysis showed that CA decreased cell proliferation in a dose- and time-dependent manner without affecting cell cycle progression. CA also inhibited cell migration and repressed epithelial-to-mesenchymal transition by upregulating the expression of cadherin 1 (CDH1) and downregulating the expression of cadherin 2 (CDH2). Furthermore, CA reduced the cancer stem cell population from 95% to 63% and 47% at concentrations of 1.25 and 2.5 mg/mL, respectively; and inhibited stem cell-like properties by downregulating the expression of NANOG and octamer-binding transcription factor 4 (OCT4) genes. These findings suggest that CA could be considered in the development of improved chemotherapy against prostate cancer.
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