Analysis of the sphingomyelin phosphodiesterase 1 gene (SMPD1) in Turkish Niemann-Pick disease patients: mutation profile and description of a novel mutation.

Abstract

Niemann-Pick disease (NPD) is a lysosomal storage disorder that results from the deficiency of a lysosomal enzyme, acid sphingomyelinase. Niemann-Pick disease type A and B is caused by mutations in the sphingomyelin phosphodiesterase gene (SMPD1) coding for ASM. The aim of this study was to evaluate the spectrum of SMPD1 gene mutations in Turkish NPD patients and to study genotype-phenotype associations. We present a molecular analysis of 10 Turkish NPD type A/B patients. Four of the patients had type A and six had type B NPD. All mutant SMPD1 alleles were identified, including 5 different mutations, 1 of which was novel. These mutations included three missense mutations: c.409T>C (p.L137P), c.1262 A>G (p.H421R) and c.1552T>C (p.L549P), a common frameshift mutation in codon 189, identified in three patients, is caused by the deletion of the 567T, introducing a stop codon 65 amino acids downstream (p.P189fsX65), and a novel frameshift mutation c.1755delC (p.P585PfsX24) which was not reported previously.

• Authors: A Aykut, E Karaca, H Onay, S Kalkan Ucar, M Coker, O Cogulu, F Ozkinay
• Journal: Gene (Gene) Vol. 526 Issue 2 Pg. 484-6 (Sep 10 2013) ISSN: 1879-0038 [Electronic] Netherlands
• PMID: 23618813 (Publication Type: Journal Article)
• Copyright: Copyright © 2013. Published by Elsevier B.V.

Chemical References

• Codon
• SMPD1 protein, human
• Sphingomyelin Phosphodiesterase

Topics

• Amino Acid Substitution
• Child
• Child, Preschool
• Codon
• Exons
• Female
• Genetic Association Studies
• Humans
• Infant
• Infant, Newborn
• Male
• Mutation
• Niemann-Pick Diseases (diagnosis, genetics)
• Sphingomyelin Phosphodiesterase (genetics)
• Turkey