Regionally selective decreases in cerebral glucose metabolism in a mouse model of phenylketonuria.
Impairment of cognitive function is characteristic of untreated phenylketonuria in humans and in the pah(enu2) mouse model of phenylketonuria. We measured regional cerebral metabolic rate for glucose in the adult male pah(enu2) mouse to determine the effect of PKU on functional activity in brain and to discern what, if any, brain areas are affected. Our results demonstrate selective decreases (17-21%) in regions thought to be involved in executive function. Regions most significantly affected include prelimbic, anterior cingulate, orbital frontal and perirhinal cortex. Sensory and motor areas of cortex and hippocampus were remarkably unaffected.
Qin
M
M
Laboratory of Cerebral Metabolism, Department of Health and Human Services, National Institute of Health, United States Public Health Service, Bethesda, MD 20892-1298, USA.
Smith
C Beebe
CB
D000818:Animals; D001794:Blood Pressure; D001921:Brain / Q000378:metabolism*; D002250:Carbon Radioisotopes; D003847:Deoxyglucose / Q000378:metabolism*; D004195:Disease Models, Animal; D006580:Genetic Carrier Screening; D005947:Glucose / Q000378:metabolism*; D006400:Hematocrit; D006720:Homozygote; D008297:Male; D051379:Mice; D010651:Phenylalanine Hydroxylase / Q000235:genetics*; D010661:Phenylketonurias / Q000235:genetics / Q000378:metabolism* / Q000503:physiopathology; D017354:Point Mutation
D002250:Carbon Radioisotopes; D003847:Deoxyglucose; D010651:Phenylalanine Hydroxylase; D005947:Glucose