ATF6 and neoplasm: In BxPC-3-derived xenograft tumor model, treatment with Tan IIA induced ER stress by up-regulating the levels of PERK, ATF6, caspase-12, IRE1α, eIF2α, p-JNK, CHOP, and caspase-3 and inhibited the tumor growth in vivo (Chiu and Su, 2017).