Naturally occurring lignans efficiently induce apoptosis in colorectal tumor cells

Publisher Website
Google Scholar
Abstract
Plant-derived lignans caused cell loss by apoptosis in colorectal adenoma and carcinoma cells. Nordihydroguaiaretic acid (NDGA), commonly used for the inhibition of lipoxygenase isoenzymes, showed the strongest growth inhibition with an IC50 of 1.9±0.5 µg followed by epiashantin (IC50=9.8±4.5 µM) and arctigenin (IC50=16.5±8.5 µM). The lignans caused a time- and dose-dependent loss of mitochondrial membrane potential (MMP), down regulation of the anti-apoptotic protein bclxl and an increase of the apoptotic index. The time interval until loss of MMP and down modulation of bclxl became evident correlated with the efficiency of growth inhibition by NDGA, epiashantin and yangambin. Bcl2 and caspase 3 were not involved. NDGA also induced a shift of the culture population to the G2/M phase of the cell cycle. With respect to these results, naturally occurring lignans could be useful in the therapy and chemoprevention of colorectal tumors.

This publication has 30 references indexed in Scilit: