Mutation analysis of the GLUT2 gene in patients with Fanconi-Bickel syndrome.
Fanconi-Bickel syndrome (FBS) is an autosomal recessive disorder manifesting hepatorenal glycogen accumulation, Fanconi nephropathy, and impaired utilization of glucose and galactose. Several mutations in a gene encoding a glucose transporter, GLUT2, have recently been reported in patients with FBS. We performed molecular analysis on three Japanese patients and found four novel mutations: a splice-site mutation (IVS2-2A>G), a nonsense mutation (Q287X), and two missense mutations (L389P and V423E). Heterozygotes of L389P or V423E mutation from the patients' families showed renal glucosuria. These data suggested that GLUT2 gene defects may be a cause of renal glucosuria.
Sakamoto
O
O
Department of Pediatrics, Medical Genetics, Tohoku University School of Medicine, Sendai, Japan.
Ogawa
E
E
Ohura
T
T
Igarashi
Y
Y
Matsubara
Y
Y
Narisawa
K
K
Iinuma
K
K
D000293:Adolescent; D001483:Base Sequence; D002675:Child, Preschool; D018389:Codon, Nonsense; D004252:DNA Mutational Analysis; D017931:DNA Primers / Q000235:genetics; D005198:Fanconi Syndrome / Q000235:genetics*; D005260:Female; D051273:Glucose Transporter Type 2; D006008:Glycogen Storage Disease / Q000235:genetics*; D006030:Glycosuria, Renal / Q000235:genetics; D006579:Heterozygote; D006720:Homozygote; D006801:Humans; D007231:Infant, Newborn; D007564:Japan; D008297:Male; D009004:Monosaccharide Transport Proteins / Q000235:genetics*; D009154:Mutation; D020125:Mutation, Missense; D010375:Pedigree; D017354:Point Mutation; D012326:RNA Splicing / Q000235:genetics
D018389:Codon, Nonsense; D017931:DNA Primers; D051273:Glucose Transporter Type 2; D009004:Monosaccharide Transport Proteins