Multilevel analyses of SCN5A mutations in arrhythmogenic right ventricular dysplasia/cardiomyopathy suggest non-canonical mechanisms for disease pathogenesis

Autor: Bin Lin, Anneline S.J.M. te Riele, Francesca Brun, Connie R. Bezzina, Mingliang Zhang, Cynthia A. James, Xianming Lin, Daniel P. Judge, Toon A.B. van Veen, Gordon F. Tomaselli, Nara Sobreira, Luisa Mestroni, Matthew R.G. Taylor, J. Peter van Tintelen, Harikrishna Tandri, Brittney Murray, Eli Rothenberg, Esperanza Agullo-Pascual, Lei Bu, Hugh Calkins, Crystal Tichnell, Roos F. Marsman, Maarten P. van den Berg, Arthur A.M. Wilde, Richard N.W. Hauer, Dennis Dooijes, Marina Cerrone, Alejandra Leo-Macias, Steven J. Fowler, Jeroen F. van der Heijden, Mario Delmar, Nuria Amat-Alarcon, Gianfranco Sinagra
Přispěvatelé: ACS - Amsterdam Cardiovascular Sciences, Cardiology, Human Genetics, ACS - Heart failure & arrhythmias, ACS - Pulmonary hypertension & thrombosis, Te Riele, Anneline S. J. M, Agullo Pascual, Esperanza, James, Cynthia A, Leo Macias, Alejandra, Cerrone, Marina, Zhang, Mingliang, Lin, Xianming, Lin, Bin, Sobreira, Nara L, Amat Alarcon, Nuria, Marsman, Roos F, Murray, Brittney, Tichnell, Crystal, van der Heijden, Jeroen F, Dooijes, Denni, van Veen, Toon A. B, Tandri, Harikrishna, Fowler, Steven J, Hauer, Richard N. W, Tomaselli, Gordon, van den Berg, Maarten P, Taylor, Matthew R. G, Brun, Francesca, Sinagra, Gianfranco, Wilde, Arthur A. M, Mestroni, Luisa, Bezzina, Connie R, Calkins, Hugh, Peter van Tintelen, J, Bu, Lei, Delmar, Mario, Judge, Daniel P., Cardiovascular Centre (CVC)
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Cardiovascular research, 113(1), 102-111. Oxford University Press
Cardiovascular Research, 113(1), 102-111. Oxford University Press
Cardiovascular Research, 113(1), 102. Oxford University Press
ISSN: 0008-6363
DOI: 10.1093/cvr/cvw234
Popis: Aims Arrhythmogenic Right Ventricular Dysplasia/Cardiomyopathy (ARVD/C) is often associated with desmosomal mutations. Recent studies suggest an interaction between the desmosome and sodium channel protein Na(v)1.5. We aimed to determine the prevalence and biophysical properties of mutations in SCN5A (the gene encoding Na(v)1.5) in ARVD/C.Methods and results We performed whole-exome sequencing in six ARVD/C patients (33% male, 38.2 +/- 12.1 years) without a desmosomal mutation. We found a rare missense variant (p.Arg1898His; R1898H) in SCN5A in one patient. We generated induced pluripotent stem cell-derived cardiomyocytes (hIPSC-CMs) from the patient's peripheral blood mononuclear cells. The variant was then corrected (R1898R) using Clustered Regularly Interspaced Short Palindromic Repeats/Cas9 technology, allowing us to study the impact of the R1898H substitution in the same cellular background. Whole-cell patch clamping revealed a 36% reduction in peak sodium current (P = 0.002); super-resolution fluorescence microscopy showed reduced abundance of Na(v)1.5 (P = 0.005) and N-Cadherin (P = 0.026) clusters at the intercalated disc. Subsequently, we sequenced SCN5A in an additional 281 ARVD/C patients (60% male, 34.8 +/- 13.7 years, 52% desmosomal mutation-carriers). Five (1.8%) subjects harboured a putatively pathogenic SCN5A variant (p.Tyr416Cys, p.Leu729del, p.Arg1623Ter, p.Ser1787Asn, and p.Val2016Met). SCN5A variants were associated with prolonged QRS duration (119 +/- 15 vs. 94 +/- 14 ms, P Conclusions Almost 2% of ARVD/C patients harbour rare SCN5A variants. For one of these variants, we demonstrated reduced sodium current, Na(v)1.5 and N-Cadherin clusters at junctional sites. This suggests that Na(v)1.5 is in a functional complex with adhesion molecules, and reveals potential non-canonical mechanisms by which Na(v)1.5 dysfunction causes cardiomyopathy.
Databáze: OpenAIRE
Externí odkaz: