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Mutations in NEBL encoding the cardiac Z-disk protein nebulette are associated with various cardiomyopathies

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Item Type:Article
Title:Mutations in NEBL encoding the cardiac Z-disk protein nebulette are associated with various cardiomyopathies
Creators Name:Perrot, A. and Tomasov, P. and Villard, E. and Faludi, R. and Melacini, P. and Lossie, J. and Lohmann, N. and Richard, P. and De Bortoli, M. and Angelini, A. and Varga-Szemes, A. and Sperling, S.R. and Simor, T. and Veselka, J. and Oezcelik, C. and Charron, P.
Abstract:Introduction: Transgenic mice overexpressing mutated NEBL, encoding the cardiac-specific Z-disk protein nebulette, develop severe cardiac phenotypes. Since cardiomyopathies are commonly familial and because mutations in a single gene may result in variable phenotypes, we tested the hypothesis that NEBL mutations are associated with cardiomyopathy. Material and methods: We analyzed 389 patients, including cohorts of patients with dilated cardiomyopathy (DCM), hypertrophic cardiomyopathy (HCM), and left ventricular non-compaction cardiomyopathy (LVNC). The 28 coding exons of the NEBL gene were sequenced. Further bioinformatic analysis was used to distinguish variants. Results: In total, we identified six very rare heterozygous missense mutations in NEBL in 7 different patients (frequency 1.8%) in highly conserved codons. The mutations were not detectable in 320 Caucasian sex-matched unrelated individuals without cardiomyopathy and 192 Caucasian sex-matched blood donors without heart disease. Known cardiomyopathy genes were excluded in these patients. The mutations p.H171R and p.I652L were found in 2 HCM patients. Further, p.Q581R and p.S747L were detected in 2 DCM patients, while the mutation p.A175T was identified independently in two unrelated patients with DCM. One LVNC patient carried the mutation p.P916L. All HCM and DCM related mutations were located in the nebulin-like repeats, domains responsible for actin binding. Interestingly, the mutation associated with LVNC was located in the C-terminal serine-rich linker region. Conclusions: Our data suggest that NEBL mutations may cause various cardiomyopathies. We herein describe the first NEBL mutations in HCM and LVNC. Our findings underline the notion that the cardiomyopathies are true allelic diseases.
Keywords:Cardiomyopathy, Hypertrophic, Dilated, Non-Compaction, Genetics
Source:Archives of Medical Science
Publisher:Termedia Publishing House
Page Range:263-278
Date:April 2016
Official Publication:https://doi.org/10.5114/aoms.2016.59250
PubMed:View item in PubMed

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