The effects of American ginseng crude extract and sub-fractions on Nrf2 activation in RAW264.7 cells. (A) The effect of American ginseng crude extracts, hexane fraction, and panaxynol on Nrf2 expression in RAW264.7 cells. Sub-confluent RAW264.7 cells were treated with American ginseng crude extracts (Am. G), hexane fraction (Hexane-F), and panaxynol in DMEM supplemented with 2% FBS as indicated. The immunoblotting results are representative of three separate experiments. (B) The effect of American ginseng crude extracts, hexane fraction, and panaxynol on NQO-1 expression in RAW264.7 cells. Sub-confluent RAW264.7 cells were treated with American ginseng crude extracts (Am. G), hexane fraction (Hexane-F), and panaxynol in DMEM supplemented with 2% FBS. n=4, *p<0.05 vs. control (0). (C) The effect of American ginseng crude extracts, hexane fraction, and panaxynol on Nrf2 expression and nuclear translocation in RAW264.7 cells. Sub-confluent RAW264.7 cells were treated with American ginseng crude extracts (Am. G, 100 μg/ml), hexane fraction (Hexane-F, 100 μg/ml), and panaxynol (0.5 μM) in DMEM supplemented with 2% FBS for 1 h. The images of confocal analysis of Nrf2 expression are representative of three separate experiments.