In summary, our findings revealed that ER stress suppresses the expression of the miR-199a/214 cluster by activating NFκB to upregulate pro-survival XBP-1 expression, which suggested a novel UPR/NFκB/miR-214/XBP-1 regulatory circuitry whose dysfunction may contribute to tumor survival and progression of HCC. The gene discussed is NFKB1; the disease is hepatocellular carcinoma.