Protein extraction and blotting analyses were carried out as previously reported [35 (link)]. The utilized antibodies included mouse antibody to Nrf2 (MAB3925, 1:500; R&D System), HO-1 (sc-390991, 1:750; Santa Cruz Biotechnology, Santa Cruz, CA, USA), β-actin (MAB8929, 1:500; R&D System), and goat anti-mouse IgG (sc-2039, 1:5000; Santa Cruz Biotechnology, Santa Cruz, CA, USA). The proteins were visualized using an enhanced chemiluminescence detection kit (Bio-Rad, Hercules, CA, 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 referenced to β-actin, and the data presented in terms of percent relative to controls.
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