Two-Day Starvation Does Not Alter the Kinetics of Blood-Brain Barrier Transport and Phosphorylation of Glucose in Rat Brain

Abstract
The blood-brain barrier (BBB) transport and brain phosphorylation of glucose were assessed in conscious rats subjected to 2 days of starvation. Although plasma glucose decreased, no significant changes in brain blood flow, BBB glucose transport, or 2-deoxy-d-glucose phosphorylation were observed. The data suggest that adaptive changes of brain glucose metabolism previously observed in starvation are located beyond the initial steps of brain entry and phosphorylation.