A novel locus for autosomal-dominant dilated cardiomyopathy maps to chromosome 7q22.3-31.1.

Abstract:

:Inherited dilated cardiomyopathy (DCM) is a genetically and phenotypically very heterogeneous disease. DCM is caused by mutations in multiple genes encoding proteins that are involved in force generation, force transmission, energy production and several signalling pathways. Thus, the pathophysiology of heart failure is complex and not yet fully understood. Familial forms of DCM let the way to identify new key proteins by positional cloning and to study respective pathomechanisms that are critical for normal cardiac function, but may not have been correlated with heart disease before. Here we report a three-generation pedigree including 16 individuals affected by dilated cardiomyopathy without additional phenotypes. The pedigree is consistent with autosomal-dominant inheritance and age-related penetrance. A genome-wide linkage analysis excluded linkage to all known DCM genes and loci, whereas several close markers on chromosome 7q22.3-31.1 segregated with the disease (maximum logarithm of odds score, 4.20 at D7S471 and D7S501). The disease causing mutation lies in a 9.73 Mb interval between markers D7S2545 and D7S2554 that contains no known cytoskeletal genes. Coding exons of the candidate genes LAMB1, LAMB4 and PIK3CG were screened but no mutations were identified.

journal_name

Hum Genet

journal_title

Human genetics

authors

Schönberger J,Kühler L,Martins E,Lindner TH,Silva-Cardoso J,Zimmer M

doi

10.1007/s00439-005-0064-2

keywords:

subject

Has Abstract

pub_date

2005-12-01 00:00:00

pages

451-7

issue

3-4

eissn

0340-6717

issn

1432-1203

journal_volume

118

pub_type

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