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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Monoterpenes inhibit proliferation of human colon cancer cells by modulating cell cycle-related protein expression.

The monoterpene perillyl alcohol ( POH) is a naturally occurring anti-cancer compound which is effective against a variety of rodent organ-specific tumor models. To establish the molecular mechanisms of POH and its major metabolite perillic acid (PA) as anti-proliferative agents, their effects on cell proliferation, cell cycle and cell cycle regulatory proteins were studied in HCT 116 human colon cancer cells. POH, and to a lesser extent, PA, exerted a dose-dependent inhibitory effect on cell growth correlated with a G1 arrest. Analysis of G1 cell cycle regulators expression revealed that monoterpenes increased expression of cdk inhibitor p21(Waf1/Cip1) and cyclin E, and decreased expression of cyclin D1, cyclin-dependent kinase (cdk) 4 and cdk2. Our results suggest that monoterpenes induce growth arrest of colon cancer cells through the up-regulation of p21(Waf1/Cip1) and the down-expression of cyclin D1 and its partner cdk4.[1]


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