NFKB1 and neoplasm: To further investigate the effects of DCS on inflammation, we measured inflammation‐related protein expression of IKBα, p‐NF‐κB, NF‐κB, prostaglandin E synthase 2 (PTGES2) and cyclooxygenase‐2 (COX‐2), in NCI‐H460 cells and tumour tissue.