The ubiquitous isoform of 6-phosphofructo-2-kinase⁄fructose-2,6-bisphos-phatase (uPFK-2), a product of thePfkfb3gene, plays a crucial role in the control of glycolytic flux. In this study, we demonstrate that Pfkfb3gene expression is increased in streptozotocin-induced diabetic mouse liver. The Pfkfb3⁄-3566 promoter construct linked to the luciferase reporter gene was delivered to the liver via hydrodynamic gene transfer.