Mapping Novel Disease Genes for Dilated Cardiomyopathy

2014-08-27 03:55:46 | BioPortfolio


To identify new dilated cardiomyopathy genes by genetic linkage and mutational analyses.



Dilated cardiomyopathy (DCM) is a heritable, genetically heterogeneous disorder causing congestive heart failure. Current medical therapy has minimal impact on prognosis and cardiac transplantation is the only definitive treatment for end-stage disease. The molecular and cellular mechanisms underlying DCM are poorly defined, but the importance of single gene defects in disease pathogenesis is becoming increasingly apparent.


The genetic epidemiology study will identify novel dilated cardiomyopathy genes using genetic linkage and mutational analyses. The first aim is to determine the chromosomal location of novel familial dilated cardiomyopathy genes. This will be accomplished by genome-wide genotyping and genetic linkage analyses in three large families with autosomal dominant dilated cardiomyopathy. Previously identified dilated cardiomyopathy genes have been excluded in these families. The second aim is to identify mutations in novel genes that cause familial dilated cardiomyopathy by linkage and sequence analyses of candidate genes mapping to dilated cardiomyopathy loci. Once novel genes for familial dilated cardiomyopathy are identified, the third aim will be to determine the role of these genes in a large cohort of unrelated patients with familial and sporadic dilated cardiomyopathy. High throughput DNA sequence analyses will be performed to identify additional inherited and de novo mutations.

Study Design



Cardiomyopathy, Congestive




National Heart, Lung, and Blood Institute (NHLBI)

Results (where available)

View Results


Published on BioPortfolio: 2014-08-27T03:55:46-0400

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Medical and Biotech [MESH] Definitions

A group of diseases in which the dominant feature is the involvement of the CARDIAC MUSCLE itself. Cardiomyopathies are classified according to their predominant pathophysiological features (DILATED CARDIOMYOPATHY; HYPERTROPHIC CARDIOMYOPATHY; RESTRICTIVE CARDIOMYOPATHY) or their etiological/pathological factors (CARDIOMYOPATHY, ALCOHOLIC; ENDOCARDIAL FIBROELASTOSIS).

Disease of CARDIAC MUSCLE resulting from chronic excessive alcohol consumption. Myocardial damage can be caused by: (1) a toxic effect of alcohol; (2) malnutrition in alcoholics such as THIAMINE DEFICIENCY; or (3) toxic effect of additives in alcoholic beverages such as COBALT. This disease is usually manifested by DYSPNEA and palpitations with CARDIOMEGALY and congestive heart failure (HEART FAILURE).

An autosomal dominant inherited form of HYPERTROPHIC CARDIOMYOPATHY. It results from any of more than 50 mutations involving genes encoding contractile proteins such as VENTRICULAR MYOSINS; cardiac TROPONIN T; ALPHA-TROPOMYOSIN.

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A form of CARDIAC MUSCLE disease, characterized by left and/or right ventricular hypertrophy (HYPERTROPHY, LEFT VENTRICULAR; HYPERTROPHY, RIGHT VENTRICULAR), frequent asymmetrical involvement of the HEART SEPTUM, and normal or reduced left ventricular volume. Risk factors include HYPERTENSION; AORTIC STENOSIS; and gene MUTATION; (FAMILIAL HYPERTROPHIC CARDIOMYOPATHY).

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