Glucose transporter expression in brain: relationship to cerebral glucose utilization.
Glucose is the principle energy source for mammalian brain. Delivery of glucose from the blood to the brain requires its transport across the endothelial cells of the blood-brain barrier and across the plasma membranes of neurons and glia, which is mediated by the facilitative glucose transporter proteins. The two primary glucose transporter isoforms which function in cerebral glucose metabolism are GLUT1 and GLUT3. GLUT1 is the primary transporter in the blood-brain barrier, choroid plexus, ependyma, and glia; GLUT3 is the neuronal glucose transporter. The levels of expression of both transporters are regulated in concert with metabolic demand and regional rates of cerebral glucose utilization. We present several experimental paradigms in which alterations in energetic demand and/or substrate supply affect glucose transporter expression. These include normal cerebral development in the rat, Alzheimer's disease, neuronal differentiation in vitro, and dehydration in the rat.
Department of Pediatrics, Milton S. Hershey Medical Center-Pennsylvania State University, Hershey, PA, USA.
S J
SJ
Vannucci
R R
RR
Clark
E
E
Koehler-Stec
K
K
Li
C B
CB
Smith
P
P
Davies
F
F
Maher
I A
IA
Simpson
D000375:Aging / Q000378:metabolism; D000544:Alzheimer Disease / Q000378:metabolism; D000818:Animals; D000831:Animals, Newborn / Q000254:growth & development / Q000378:metabolism; D001921:Brain / Q000254:growth & development / Q000378:metabolism*; D002531:Cerebellum / Q000166:cytology / Q000378:metabolism; D003681:Dehydration / Q000378:metabolism; D005947:Glucose / Q000378:metabolism*; D051272:Glucose Transporter Type 1; D051274:Glucose Transporter Type 3; D006801:Humans; D007030:Hypothalamo-Hypophyseal System / Q000378:metabolism; D008297:Male; D009004:Monosaccharide Transport Proteins / Q000235:genetics / Q000378:metabolism*; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats
D051272:Glucose Transporter Type 1; D051274:Glucose Transporter Type 3; D009004:Monosaccharide Transport Proteins; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger; C495677:SLC2A1 protein, human; C495687:SLC2A3 protein, human; C495679:Slc2a1 protein, rat; C495690:Slc2a3 protein, rat; D005947:Glucose