Equal quantities of proteins (10 to 30 µg) were run on Mini-PROTEAN TGX Stain Free precast polyacrylamide 4–20% gels (BIORAD) in Tris glycine-SDS buffer (BIORAD). Proteins were transferred on Immobilon-P PVDF membranes (Millipore) in Tris glycine-Ethanol 20% buffer (BIORAD). Stain Free technology allows visualizing total proteins without use of any dye. The following antibodies were used at dilutions from 1/200 to 1/1000: anti-caspase 9 (32539, Abcam, Cambridge, UK), anti-cleaved caspase 3 (5A1E, Cell Signaling, Danvers, MA, USA), anti-PARP (Cell signaling 92845), anti-FGF1 (R&D AB-32-NA, Minneapolis, MN, USA) and anti-FGF1 (Cat.No.010-24161, WAKO, Osaka, Japan), anti-p53 DO1 (Santa Cruz Sc-126), anti-p53pSer15 (Cell signaling 92845), anti-PUMA N-19 (Santa Cruz Sc-19187), anti-Bax I-19 (Santa Cruz Sc-930), anti-p21 C-19 (Santa Cruz Sc-397-G) and anti-TOM40 H-300 (Santa Cruz Sc-11414). Secondary antibodies were HRP coupled (Jackson Immunoresearch, West Grove, PA, USA) and the revelation was performed using Clarity Western ECL Blotting Substrate (BIORAD). Secondary antibodies were HRP coupled (Jackson Immunoresearch) and the detection was performed using Clarity Western ECL Blotting Substrate (BIORAD). The chemiluminescent signal was captured by Chemidoc (BIORAD) and quantification was performed with the ImageLab software (BIORAD).
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