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Inhibition of PKM2 improves Ang‐II‐induced cardiac fibroblasts oxidative stress. (A–D) After the treatment of shikonin and Ang II for 12 h in cardiac fibroblasts, ROS, MDA and GSH/GSSG ratio were determined using assay kits, and Gpx4 levels were measured by qRT‐PCR assay (n = 3 per group)
