GPX4 and brain ischemia: Contrastingly, within the hippocampal region, GPX4 expression followed a “decrease‐then‐increase” trend post‐cerebral ischemia, being lower at D7 (Figure 1G,H, p < 0.05, n = 4), but surpassing baseline level by D28 (Figure 1G,H, p < 0.01, n = 4).