Protein concentration in the PFC was determined as reported previously. Equal quantities of protein were loaded onto a 10–15% gradient polyacrylamide gel, electrophoretically transferred to a polyvinylidene difluoride membrane and probed with the following primary antibodies:
Bcl-2 antibody (1:1000, Santa Cruz Biotechnology, CA, USA),
Bax antibody (1:1000, Santa Cruz Biotechnology), Shh (1:1000, Proteintech.), Gli-1 (1:1000, Santa Cruz Biotechnology), Ptch (1:1000, Abcam, Cambridge, MA, USA),
caspase-3 (1:500, Cell Signaling Tech. MA, USA), cleaved
caspase-3 (1:1000, Cell Signaling),
Phospho-extracellular signal-regulated kinase (ERK)1/2 (1:2000, Cell Signaling),
ERK1/2 (1:2000; Cell Signaling), Nrf2 (1:1000, Proteintech.), HO-1 (1:2000, Proteintech.).
β-actin (1:2000; Sigma-Aldrich) was used as an internal loading control.
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