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  • Title: Mutation analysis of two Japanese patients with Fanconi-Bickel syndrome.
    Author: Akagi M, Inui K, Nakajima S, Shima M, Nishigaki T, Muramatsu T, Kokubu C, Tsukamoto H, Sakai N, Okada S.
    Journal: J Hum Genet; 2000; 45(1):60-2. PubMed ID: 10697967.
    Abstract:
    Fanconi-Bickel syndrome (FBS), or glycogen storage disease type XI, is a rare autosomal recessive disorder characterized by hepatorenal glycogen accumulation, Fanconi nephropathy, and impaired utilization of glucose and galactose. Recently, this disease was elucidated to link mutations in the glucose transporter 2 (GLUT2) gene. Only three mutations in three FBS families have been reported. Therefore, it is important to elucidate mutations in the GLUT2 gene in FBS by answering the question of whether the syndrome is a single gene disease. In this report, we describe two patients in two unrelated families clinically diagnosed with FBS. No mutation in the entire protein coding region of the GLUT2 gene was detected in patient 1, which suggested that no mutation existed in the GLUT2 gene, or that some mutations had affected the expression of the GLUT2 gene. In patient 2, a novel homozygous nonsense mutation (W420X, Trp at codon 420 to stop codon) was detected. These results support the correlation between GLUT2 gene mutation and FBS syndrome. However, many patients must be analyzed to determine whether other genes are involved in FBS.
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