For instance, curcumin, a flavonoid isolated from Curcuma longa, has been indicated to boost radiation‐inhibited growth of HCC through NF‐κB inactivation as well as attenuating radiation‐induced pneumonitis by downregulation of dual oxidase 1 and 2 expression.18, 19. This evidence concerns the gene NFKB1 and hepatocellular carcinoma.