Fig. 1: Hypoxic CRC cells possess higher metastatic capacity than normoxic CRC cells.

a Schematic of the in vitro physical hypoxic treatment of CRC cells. b Immunoblot analysis of HIF1α in hypoxic CRC cells. Normoxic CRC cells as control, and β-actin for loading control. c Transwell invasion assays. In all, 4 × 104 hypoxic (HSS) and normoxic (Control) CRC cells were incubated, invaded cells were quantified. Scale bars: 200 µm. Mean ± SD from triple experiments. *P < 0.05, **P < 0.01. d Quantified numbers of visible metastases in NOD/SCID mice by injecting hypoxic (HSS) and normoxic (Control) xhCRC cells to tail veins (n = 5 per group). Data are presented as mean ± SD. ***P < 0.001.