Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Genomics. 2013 Sep;102(3):169-73. doi: 10.1016/j.ygeno.2013.06.001. Epub 2013 Jun 15.

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

Author information

  • 1Department of Clinical Genetics, Bayi Children's Hospital Affiliated to General Hospital of Beijing Military Region, China.

Abstract

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.

Copyright © 2013 Elsevier Inc. All rights reserved.

KEYWORDS:

Massively-parallel sequencing; Mucolipidosis; N-acetylglucosamine-1-phosphotransferase; Nonsense mutation

PMID:
23773965
[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk