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Gene. 2014 Feb 1;535(1):53-9. doi: 10.1016/j.gene.2013.10.066. Epub 2013 Nov 21.

Clinical and molecular genetic study of infantile-onset Pompe disease in Chinese patients: identification of 6 novel mutations.

Author information

1
Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
2
Department of Pediatric Endocrinologic, Genetic and Metabolic Diseases, Shanghai Institute for Pediatric Research, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China.
3
Department of Internal Medicine, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
4
Department of Cardiothoracic Surgery, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China.
5
Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China. Electronic address: huangmeirong@scmc.com.cn.
6
Department of Cardiology, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai 200127, China. Electronic address: chensb@sh163.net.

Abstract

Pompe disease is an autosomal recessive disorder and is caused by a deficiency in acid alpha-glucosidase (GAA). A broad range of studies have been performed on Pompe patients from different countries. However, the clinical course and molecular basis of the disease in Mainland China have not been well defined. In the present study, we examined a total of 18 Chinese children with infantile-onset Pompe disease to better understand the clinical and genetic features in this population. The median age at symptom onset was 3.6 months (range: 1.7-6.8 months) and 6.3 months at diagnosis (range: 2.5-9.3 months). All but 1 patient died at a median age of 8.2 months (range: 4.7-18.7 months). Molecular analysis revealed 20 different mutations, 6 of which are novel (c.1356delC, c.378G>A, c.1827C>G, c.859-2 A>T, c.1551+2T>G, and c.1465G>T). The most common mutation in the study was c.1935C>A, accounting for 25% (9/36 alleles) of the mutations. Our study provides the first comprehensive examination of the clinical course of infantile-onset Pompe disease and mutations of the GAA gene for patients in Mainland China. Our results confirm the high prevalence of the c.1935C>A mutation, previously reported for other populations, in Mainland Chinese patients with infantile-onset Pompe disease. Furthermore, six novel mutations in the GAA gene are reported for the first time.

KEYWORDS:

Acid α-glucosidase; GAA; Glycogen storage disease type II; Lysosomal storage disease; Mutation analysis; PAS; PD; Pompe disease; RT-PCR; SIFT; Sorting Intolerant from Tolerant; acid alpha-glucosidase; periodic acid-Schiff; reverse transcriptase–polymerase chain reaction

PMID:
24269976
DOI:
10.1016/j.gene.2013.10.066
[Indexed for MEDLINE]
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