Triptolide inhibits proliferation and migration of colon cancer cells by inhibition of cell cycle regulators and cytokine receptors.

The Journal of Surgical Research
Sara M JohnsonB Mark Evers

Abstract

Phytochemicals are an important source of emerging preventive and therapeutic agents for cancer. Triptolide/PG490, an extract of the Chinese herb Tripterygium wilfordii Hook F, is a potent anti-inflammatory agent that also possesses anticancer activity. While its antiproliferative effects are well-established, the potential antimigratory effects of triptolide have not been characterized. Effects of triptolide on the proliferation and invasion of colon cancer cells and expression of cancer-related genes and proteins were assessed. Triptolide potently inhibited HT29 and HCT116 colon cancer cell growth and reduced basal and stimulated HCT116 migration through collagen by 65% to 80%. Triptolide inhibited mRNA expression of the positive cell cycle regulatory genes c-myc, and A, B, C, and D-type cyclins in multiple colon cancer cell lines. Additionally, we show that triptolide treatment decreased expression of VEGF and COX-2, which promote cancer progression and invasion, and inhibited the expression of multiple cytokine receptors potentially involved in cell migration and cancer metastasis, including the thrombin receptor, CXCR4, TNF receptors, and TGF-β receptors. Triptolide is a potent inhibitor of colon cancer proliferation and m...Continue Reading

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