XBP1 and hepatocellular carcinoma: Result show that miR-214 and miR-199a-3p/5p was significantly down-regulated in HepG2 cells after TG and TM treatments or anoxia, further suggesting that UPR activated XBP-1 or mTOR and ERK pathway to protect tumor cell survival though suppression of the miR-199a2/214 cluster in HCC.