Fig. 1. Response of the PFKFB3 gene to hypoxia, cobalt, and desferrioxamine.
a, Hep-3B cells were maintained in normoxia (N), exposed to hypoxia (H), 0.5% O2, or incubated with 100 µm cobalt chloride (Co) or 130 µm desferrioxamine (D) for 6 h. Total RNA was extracted and analyzed for PFKFB3 and Glut-1 mRNA expression using RNase protection assays. b, Hep-3B cells where treated with desferroxamine, and total RNA was isolated at various times (Hrs) following the treatment and analyzed for Glut-1 (left) or PFKGFB3 (right) mRNA. c, responsiveness of the PFKFB3 gene to hypoxia (H) and desferrioxamine in wild-type (W.T.) and ρ° cells (25). In all figures, 18s represents 18 S ribosomal RNA.