We performed protein extraction and western blot analyses as described previously20 (link). The utilized antibodies included mouse antibody to NQO1 (sc-376023, 1:500; Santa Cruz Biotechnology, Santa Cruz, CA, USA), Nrf2 (MAB3925, 1:500; R&D System), NFκB (p65) (sc-8008, 1:200; Santa Cruz Biotechnology), goat antibody to HO-1 (AF3169, 1:500; R&D System), β-actin (MAB8929, 1:500; R&D System), goat anti-mouse IgG (sc-2039, 1:5,000; Santa Cruz Biotechnology, Santa Cruz, CA, USA) and donkey anti-goat IgG (sc-2042, 1:5,000; Santa Cruz Biotechnology, Santa Cruz, CA, USA). The proteins were visualized using an enhanced chemiluminescence detection kit (Bio-Rad, USA) following the manufacturer’s protocol. Images were analyzed using the Kodak Image Station 2000R (Eastman Kodak Company, Rochester, NY, USA). Protein bands intensity were normalized to β-actin, and the data expressed in terms of percent relative to controls.
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