(A) mRNA expression of ER-stress markers Edem1, Ero1b, Grp94, Herp, Atf4, Eif2ak3, Ddit3, and Hspa5 in liver tissue from healthy mice; and tumor tissue and surrounding non-tumoral tissue from mice with DEN-induced HCC. This evidence concerns the gene DDIT3 and hepatocellular carcinoma.