Why the study?
Does whole exome sequencing identify causative mutations in families with complex inherited cardiac disease?
Does whole exome sequencing identify causative mutations in families with complex inherited cardiac disease?
Whole exome sequencing is a useful tool for identifying causative mutations, such as novel pathogenic NKX2.5 mutations, in complex familial cardiomyopathies.
Hypothesis-generating for NKX2.5 in familial cardiomyopathy; WES utility requires validation before clinical adoption.
BACKGROUND: The genetic basis for dilated cardiomyopathy (DCM) can be difficult to determine, particularly in familial cases with complex phenotypes. Next generation sequencing may be useful in the management of such cases. METHODS: We report two large families with pleiotropic inherited cardiomyopathy. In addition to DCM, the phenotypes included atrial and ventricular septal defects, cardiac arrhythmia and sudden death. Probands underwent whole exome sequencing to identify potentially causative variants. RESULTS: Each whole exome sequence yielded over 18,000 variants. We identified distinct mutations affecting a common amino acid in NKX2.5. Segregation analysis of the families support the pathogenic role of these variants. CONCLUSION: Our study emphasizes the utility of next generation sequencing in identifying causative mutations in complex inherited cardiac disease. We also report a novel pathogenic NKX2.5 mutation.
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Hanley et al. (2016) studied this question.
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