PTGS2 and non-small cell lung carcinoma: Reanalysis of the gene expression data from our previous study revealed that silencing of LDHB in the NSCLC cell lines A549 and H358 was associated with a significant increase in gene expression of prostaglandin-endoperoxide synthase 2 (PTGS2), a biomarker of ferroptosis17,19 (Supplementary Fig. 1a).