Glucose is the primary source of energy for most cells. Glucose uptake into cells is highly regulated and the first rate limiting step in glucose metabolism. Glucose uptake is facilitated by the GLUT family of transporter proteins, whose expression and activity are regulated by multiple mechanisms. Glucose uptake is upregulated in many cancer cells, which exhibit high rates of aerobic glycolysis. Cells exhibiting insulin resistance show diminished glucose uptake in response to insulin stimulation.
The use of the recycling amplification reaction in the colorimetric assay results in the limit of detection being 10-fold lower (20-100 pmole) compared to the fluorescence assay (200-1,000 pmole, MAK084).
