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Two homozygous nonsense mutations of GNPTAB gene in two Chinese families with mucolipidosis II alpha/beta using targeted next-generation sequencing

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机构： [a]Department of Clinical Genetics, Bayi Children's Hospital Affiliated to General Hospital of Beijing Military Region, Beijing, China [b]MyGenostics Inc., Baltimore, MD, United States [c]Department of Clinical Laboratory, General Hospital of Beijing Military Region, Beijing, China

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关键词： Massively-parallel sequencing Mucolipidosis N-acetylglucosamine-1-phosphotransferase Nonsense mutation

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Mucolipidosis II alpha/beta (ML II alpha/beta; I-cell disease) is a rare, inherited, metabolic disease and has often been clinically misdiagnosed. ML II alpha/beta results from a deficiency of the enzyme N-acetylglucosamine-1-phosphotransferase (GlcNAc-PT), which causes the lysosomal enzymes to accumulate in plasma. We identified two new Chinese patients with ML II alpha/beta by lysosomal enzyme assay. Using targeted next-generation sequencing genetic analysis, we located two homozygous nonsense mutations in the GNPTAB gene, c.1071G>A (p.W357X) and c.1090C>T (p.R364X). These results were confirmed by Sanger sequencing. To our knowledge, the c.1071G>A mutation has not been previously reported. Our findings add to the number of reported cases of this rare illness and to the GNPTAB pathogenic mutation database. This work also demonstrates the application of lysosomal enzyme assay and targeted next-generation sequencing for the genetic screening analysis and diagnosis of ML II alpha/beta. © 2013 Elsevier Inc.

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出版当年[2012]版：

大类 | 3 区生物

小类 | 3 区生物工程与应用微生物 3 区遗传学

最新[2025]版：

大类 | 2 区生物学

小类 | 2 区生物工程与应用微生物 3 区遗传学

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