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A novel locus for dilated cardiomyopathy, diffuse myocardial fibrosis, and sudden death on chromosome 10q25-26

Item Type:Article
Title:A novel locus for dilated cardiomyopathy, diffuse myocardial fibrosis, and sudden death on chromosome 10q25-26
Creators Name:Ellinor, P.T. and Sasse-Klaassen, S. and Probst, S. and Gerull, B. and Shin, J.T. and Toeppel, A. and Heuser, A. and Michely, B. and Yoerger, D.M. and Song, B.S. and Pilz, B. and Krings, G. and Coplin, B. and Lange, P.E. and Dec, G.W. and Hennies, H.C. and Thierfelder, L. and MacRae, C.A.
Abstract:OBJECTIVES: We sought to identify the genetic locus for an inherited form of dilated cardiomyopathy (DCM) that is characterized by diffuse myocardial fibrosis and sudden death. BACKGROUND: Genetic studies have mapped multiple loci for DCM, which is a major cause of nonischemic heart failure; however, the genes responsible for the majority of cases have yet to be identified. METHODS: Sixty-six family members were evaluated by 12-lead electrocardiogram (ECG), echocardiogram, and laboratory studies. Individuals with echocardiographically documented DCM were defined as affected. Subjects were considered unaffected if they were older than 20 years of age, had a normal ECG and echocardiogram, no personal history of heart failure, and had no affected offspring. Genotyping was performed using polymorphic markers. RESULTS: Genome-wide linkage analysis identified a novel locus for this inherited phenotype on chromosome 10q25.3-q26.13. Peak two-point logarithm of the odds scores >3.0 were obtained independently with each family using the markers D10S1773 and D10S1483, respectively. Haplotype analyses defined a critical interval of 14.0 centiMorgans between D10S1237 and D10S1723, corresponding to a physical distance of 9.5 megabases. Multipoint linkage analyses confirmed this interval and generated a peak logarithm of the odds score of 8.2 indicating odds of >100,000,000:1 in favor of this interval as the location of the gene defect responsible for DCM in these families. CONCLUSIONS: We have mapped a novel locus for cardiomyopathy, diffuse myocardial fibrosis, and sudden death to chromosome 10q25-q26. The identification of the causative gene in this interval will be an important step in understanding the fundamental mechanisms of heart failure and sudden death.
Keywords:Cardiomyopathies, Chromosome Mapping, Dilated Cardiomyopathy, Fibrosis, Genetic Linkage, Genetic Markers, Genetic Predisposition to Disease, Human Chromosome Pair 10, Lod Score, Pedigree, Phenotype, Sudden Cardiac Death
Source:Journal of the American College of Cardiology
Page Range:106-111
Date:4 July 2006
Official Publication:https://doi.org/10.1016/j.jacc.2006.01.079
PubMed:View item in PubMed

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