Heart Failure Reviews

, Volume 10, Issue 3, pp 237–248

Sarcomeric Proteins and Familial Hypertrophic Cardiomyopathy: Linking Mutations in Structural Proteins to Complex Cardiovascular Phenotypes

Article

DOI: 10.1007/s10741-005-5253-5

Cite this article as:
Tardiff, J.C. Heart Fail Rev (2005) 10: 237. doi:10.1007/s10741-005-5253-5

Abstract

Hypertrophic Cardiomyopathy (HCM) is a relatively common primary cardiac disorder defined as the presence of a hypertrophied left ventricle in the absence of any other diagnosed etiology. HCM is the most common cause of sudden cardiac death in young people which often occurs without precedent symptoms. The overall clinical phenotype of patients with HCM is broad, ranging from a complete lack of cardiovascular symptoms to exertional dyspnea, chest pain, and sudden death, often due to arrhythmias. To date, 270 independent mutations in nine sarcomeric protein genes have been linked to Familial Hypertrophic Cardiomyopathy (FHC), thus the clinical variability is matched by significant genetic heterogeneity. While the final clinical phenotype in patients with FHC is a result of multiple factors including modifier genes, environmental influences and genotype, initial screening studies had suggested that individual gene mutations could be linked to specific prognoses. Given that the sarcomeric genes linked to FHC encode proteins with known functions, a vast array of biochemical, biophysical and physiologic experimental approaches have been applied to elucidate the molecular mechanisms that underlie the pathogenesis of this complex cardiovascular disorder. In this review, to illustrate the basic relationship between protein dysfunction and disease pathogenesis we focus on representative gene mutations from each of the major structural components of the cardiac sarcomere: the thick filament (β MyHC), the thin filament (cTnT and Tm) and associated proteins (MyBP-C). The results of these studies will lead to a better understanding of FHC and eventually identify targets for therapeutic intervention.

Key Words

hypertrophic cardiomyopathysarcomeric proteinstransgenic models

Copyright information

© Springer Science + Business Media, Inc. 2005

Authors and Affiliations

  1. 1.Department of Physiology and Biophysics and the Department of Medicine (Cardiology)Albert Einstein College of MedicineBronx
  2. 2.Albert Einstein College of MedicineBronx