Comprehensive Protein Analysis Protocols

Western blot and immunostaining were performed using standard protocols [26 (link)]. Anti-LOX-1 (LOX19-22) sc-66155, anti-AR (N-20) sc-816, anti-GAPDH (0411) sc-47724, anti-NF-kB p65 C-20) sc-372 and anti-IκB-alfa (C-21) sc-371, and anti-STAT3 (c-20) sc-482 antibodies were obtained from Santa Cruz Biotechnology. Anti-p-p65 s536 7F1, anti-p-IκB-alfa S32/S36 5A5, androgen receptor (AR-V7 Specific), and anti-p-STAT3 (Y705) (D3A7) antibodies were obtained from Cell Signaling. For Western blot, the anti-mouse IgG-Alexa Fluor 680 and anti-rabbit IgG-Alexa Fluor 790 secondary antibodies were obtained from Jackson ImmunoResearch. Western blots were analyzed using LICOR-CLX. An anti-rabbit IgG/FITC secondary antibody from Jackson ImmunoResearch was used for immunofluorescences. Photographs were obtained by confocal microscopy (Olympus IX81, Japan). To determine IL-6 concentration from supernatants, the human ELISA Kit (D6050, R&D) was used according to manufacturer’s instructions.