Cytochalacin B, which is reported to inhibit glucose transport via GLUT1, 2, 3, and 4, decreased intracellular glucose (2). Inhibition of GLUT1 and 9 by siRNA in hepatocytes had a similar effect (35). We and others previously proposed that glucose uptake in airway cells utilized GLUT1, 2, 4, and 10 (19, 20, 25, 30). As the effect of cytochalasin B on GLUT10 is currently unknown, we suggest that glucose moves into the airway epithelial cell at least via GLUT1/2/4, and rapid metabolism by HKII maintains low intracellular glucose.