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Diagnostic Pathology
Published in: Diagnostic Pathology 1/2011

Open Access 01-12-2011 | Research

Molecular analysis of lipoid proteinosis: identification of a novel nonsense mutation in the ECM1 gene in a Pakistani family

Authors: Muhammad Nasir, Amir Latif, Muhammad Ajmal, Reem Qamar, Muhammad Naeem, Abdul Hameed

Published in: Diagnostic Pathology | Issue 1/2011

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Abstract

Lipoid proteinosis is a rare autosomal recessive disease characterized by cutaneous and mucosal lesions and hoarseness appearing in early childhood that is caused by homozygous or compound heterozygous mutations in the ECM1 gene located on chromosome 1q21. The aim of the study was to investigate the molecular genetic defect underlying lipoid proteinosis in a consanguineous Pakistani family.

Methods

Genotyping of seven members of the family was performed by amplifying microsatellite markers, tightly linked to the ECM1 gene. To screen for mutations in the ECM1 gene, all of its exons and splice junctions were PCR amplified from genomic DNA and analyzed by SSCP and sequenced directly in an ABI 3130 genetic analyzer.

Results

The results revealed linkage of the LP family to the ECM1 locus. Sequence analysis of the coding exons and splice junctions of the ECM1 gene revealed a novel homozygous mutation (c.616C > T) in exon 6, predicted to replace glutamine with stop codon (p.Q206X) at amino acid position 206.

Conclusions

The finding of a novel mutation in Pakistani family extends the body of evidence that supports the importance of ECM1 gene for the development of lipoid proteinosis.
Appendix
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Metadata
Title
Molecular analysis of lipoid proteinosis: identification of a novel nonsense mutation in the ECM1 gene in a Pakistani family
Authors
Muhammad Nasir
Amir Latif
Muhammad Ajmal
Reem Qamar
Muhammad Naeem
Abdul Hameed
Publication date
01-12-2011
Publisher
BioMed Central
Published in
Diagnostic Pathology / Issue 1/2011
Electronic ISSN: 1746-1596
DOI
https://doi.org/10.1186/1746-1596-6-69

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