Western blots were performed as previously described [54 (link)]. The following antibodies were used: IGFBP5 (ab4255, Abcam, Cambridge, UK), vimentin (ab8069, Abcam), GAPDH (ab75834, Abcam), HIF1α (NB100-134, Novus, St. Louis, MO, USA), IGF1R-P(Try1135/1136)(3024, Cell Signaling Technology (CST), Danvers, MA, USA), ERK1/2-P (Thr202/Tyr204) (4376, CST), ERK1/2 (4695, CST), E-cadherin (3195, CST), p38-MAPK-P (Thr180/Tyr182) (9215, CST), p38-MAPK (9212, CST), sheep anti-mouse IgG (ZB-2305, ZSGB-Bio, Beijing, China), and sheep anti-rabbit IgG (ZB-2301, ZSGB-Bio). Enhanced chemiluminescence substrate kit (RPN2232, GE Healthcare, Piscataway, NJ, USA) was used for the chemiluminescent detection of signals with BioMax film (Kodak, Rochester, NY, USA).
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