(a) The expressions of PARP, Caspase-3, Caspase-7, Bcl-2 and Bax, and GPX4 were determined using western blotting assay. β-actin was used as a reference control. (b) Quantitative analysis of protein expression of PARP, Caspase-3, Caspase-7, Bcl-2 and Bax, GPX4.