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Tumor cells express proangiogenic mediators in response to different ER stressors. Tumor cell lines (UM-SCC-81B, MCF7 and U87) were treated with GD (2 mM), TM (1 µg/mL) and TG (1 µM). A, UPR markers were detected by western blot. B, VEGF secretion was quantified with ELISA. *: p < 0.05.
