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Jain S, Bakolitsa C, Brenner SE, Radivojac P, Moult J, Repo S, Hoskins RA, Andreoletti G, Barsky D, Chellapan A, Chu H, Dabbiru N, Kollipara NK, Ly M, Neumann AJ, Pal LR, Odell E, Pandey G, Peters-Petrulewicz RC, Srinivasan R, Yee SF, Yeleswarapu SJ, Zuhl M, Adebali O, Patra A, Beer MA, Hosur R, Peng J, Bernard BM, Berry M, Dong S, Boyle AP, Adhikari A, Chen J, Hu Z, Wang R, Wang Y, Miller M, Wang Y, Bromberg Y, Turina P, Capriotti E, Han JJ, Ozturk K, Carter H, Babbi G, Bovo S, Di Lena P, Martelli PL, Savojardo C, Casadio R, Cline MS, De Baets G, Bonache S, Díez O, Gutiérrez-Enríquez S, Fernández A, Montalban G, Ootes L, Özkan S, Padilla N, Riera C, De la Cruz X, Diekhans M, Huwe PJ, Wei Q, Xu Q, Dunbrack RL, Gotea V, Elnitski L, Margolin G, Fariselli P, Kulakovskiy IV, Makeev VJ, Penzar DD, Vorontsov IE, Favorov AV, Forman JR, Hasenahuer M, Fornasari MS, Parisi G, Avsec Z, Çelik MH, Nguyen TYD, Gagneur J, Shi FY, Edwards MD, Guo Y, Tian K, Zeng H, Gifford DK, Göke J, Zaucha J, Gough J, Ritchie GRS, Frankish A, Mudge JM, Harrow J, Young EL, Yu Y, Huff CD, Murakami K, Nagai Y, Imanishi T, Mungall CJ, Jacobsen JOB, Kim D, Jeong CS, Jones DT, Li MJ, Guthrie VB, Bhattacharya R, Chen YC, Douville C, Fan J, Kim D, Masica D, Niknafs N, Sengupta S, Tokheim C, Turner TN, Yeo HTG, Karchin R, Shin S, Welch R, Keles S, Li Y, Kellis M, Corbi-Verge C, Strokach AV, Kim PM, Klein TE, Mohan R, Sinnott-Armstrong NA, Wainberg M, Kundaje A, Gonzaludo N, Mak ACY, Chhibber A, Lam HYK, Dahary D, Fishilevich S, Lancet D, Lee I, Bachman B, Katsonis P, Lua RC, Wilson SJ, Lichtarge O, Bhat RR, Sundaram L, Viswanath V, Bellazzi R, Nicora G, Rizzo E, Limongelli I, Mezlini AM, Chang R, Kim S, Lai C, O’Connor R, Topper S, van den Akker J, Zhou AY, Zimmer AD, Mishne G, Bergquist TR, Breese MR, Guerrero RF, Jiang Y, Kiga N, Li B, Mort M, Pagel KA, Pejaver V, Stamboulian MH, Thusberg J, Mooney SD, Teerakulkittipong N, Cao C, Kundu K, Yin Y, Yu CH, Kleyman M, Lin CF, Stackpole M, Mount SM, Eraslan G, Mueller NS, Naito T, Rao AR, Azaria JR, Brodie A, Ofran Y, Garg A, Pal D, Hawkins-Hooker A, Kenlay H, Reid J, Mucaki EJ, Rogan PK, Schwarz JM, Searls DB, Lee GR, Seok C, Krämer A, Shah S, Huang CV, Kirsch JF, Shatsky M, Cao Y, Chen H, Karimi M, Moronfoye O, Sun Y, Shen Y, Shigeta R, Ford CT, Nodzak C, Uppal A, Shi X, Joseph T, Kotte S, Rana S, Rao A, Saipradeep VG, Sivadasan N, Sunderam U, Stanke M, Su A, Adzhubey I, Jordan DM, Sunyaev S, Rousseau F, Schymkowitz J, Van Durme J, Tavtigian SV, Carraro M, Giollo M, Tosatto SCE, Adato O, Carmel L, Cohen NE, Fenesh T, Holtzer T, Juven-Gershon T, Unger R, Niroula A, Olatubosun A, Väliaho J, Yang Y, Vihinen M, Wahl ME, Chang B, Chong KC, Hu I, Sun R, Wu WKK, Xia X, Zee BC, Wang MH, Wang M, Wu C, Lu Y, Chen K, Yang Y, Yates CM, Kreimer A, Yan Z, Yosef N, Zhao H, Wei Z, Yao Z, Zhou F, Folkman L, Zhou Y, Daneshjou R, Altman RB, Inoue F, Ahituv N, Arkin AP, Lovisa F, Bonvini P, Bowdin S, Gianni S, Mantuano E, Minicozzi V, Novak L, Pasquo A, Pastore A, Petrosino M, Puglisi R, Toto A, Veneziano L, Chiaraluce R, Ball MP, Bobe JR, Church GM, Consalvi V, Cooper DN, Buckley BA, Sheridan MB, Cutting GR, Scaini MC, Cygan KJ, Fredericks AM, Glidden DT, Neil C, Rhine CL, Fairbrother WG, Alontaga AY, Fenton AW, Matreyek KA, Starita LM, Fowler DM, Löscher BS, Franke A, Adamson SI, Graveley BR, Gray JW, Malloy MJ, Kane JP, Kousi M, Katsanis N, Schubach M, Kircher M, Mak ACY, Tang PLF, Kwok PY, Lathrop RH, Clark WT, Yu GK, LeBowitz JH, Benedicenti F, Bettella E, Bigoni S, Cesca F, Mammi I, Marino-Buslje C, Milani D, Peron A, Polli R, Sartori S, Stanzial F, Toldo I, Turolla L, Aspromonte MC, Bellini M, Leonardi E, Liu X, Marshall C, McCombie WR, Elefanti L, Menin C, Meyn MS, Murgia A, Nadeau KCY, Neuhausen SL, Nussbaum RL, Pirooznia M, Potash JB, Dimster-Denk DF, Rine JD, Sanford JR, Snyder M, Cote AG, Sun S, Verby MW, Weile J, Roth FP, Tewhey R, Sabeti PC, Campagna J, Refaat MM, Wojciak J, Grubb S, Schmitt N, Shendure J, Spurdle AB, Stavropoulos DJ, Walton NA, Zandi PP, Ziv E, Burke W, Chen F, Carr LR, Martinez S, Paik J, Harris-Wai J, Yarborough M, Fullerton SM, Koenig BA, McInnes G, Shigaki D, Chandonia JM, Furutsuki M, Kasak L, Yu C, Chen R, Friedberg I, Getz GA, Cong Q, Kinch LN, Zhang J, Grishin NV, Voskanian A, Kann MG, Tran E, Ioannidis NM, Hunter JM, Udani R, Cai B, Morgan AA, Sokolov A, Stuart JM, Minervini G, Monzon AM, Batzoglou S, Butte AJ, Greenblatt MS, Hart RK, Hernandez R, Hubbard TJP, Kahn S, O’Donnell-Luria A, Ng PC, Shon J, Veltman J, Zook JM. CAGI, the Critical Assessment of Genome Interpretation, establishes progress and prospects for computational genetic variant interpretation methods. Genome Biol 2024; 25:53. [PMID: 38389099 PMCID: PMC10882881 DOI: 10.1186/s13059-023-03113-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 11/17/2023] [Indexed: 02/24/2024] Open
Abstract
BACKGROUND The Critical Assessment of Genome Interpretation (CAGI) aims to advance the state-of-the-art for computational prediction of genetic variant impact, particularly where relevant to disease. The five complete editions of the CAGI community experiment comprised 50 challenges, in which participants made blind predictions of phenotypes from genetic data, and these were evaluated by independent assessors. RESULTS Performance was particularly strong for clinical pathogenic variants, including some difficult-to-diagnose cases, and extends to interpretation of cancer-related variants. Missense variant interpretation methods were able to estimate biochemical effects with increasing accuracy. Assessment of methods for regulatory variants and complex trait disease risk was less definitive and indicates performance potentially suitable for auxiliary use in the clinic. CONCLUSIONS Results show that while current methods are imperfect, they have major utility for research and clinical applications. Emerging methods and increasingly large, robust datasets for training and assessment promise further progress ahead.
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Crotti L, Spazzolini C, Tester DJ, Ghidoni A, Baruteau AE, Beckmann BM, Behr ER, Bennett JS, Bezzina CR, Bhuiyan ZA, Celiker A, Cerrone M, Dagradi F, De Ferrari GM, Etheridge SP, Fatah M, Garcia-Pavia P, Al-Ghamdi S, Hamilton RM, Al-Hassnan ZN, Horie M, Jimenez-Jaimez J, Kanter RJ, Kaski JP, Kotta MC, Lahrouchi N, Makita N, Norrish G, Odland HH, Ohno S, Papagiannis J, Parati G, Sekarski N, Tveten K, Vatta M, Webster G, Wilde AAM, Wojciak J, George AL, Ackerman MJ, Schwartz PJ. Calmodulin mutations and life-threatening cardiac arrhythmias: insights from the International Calmodulinopathy Registry. Eur Heart J 2020; 40:2964-2975. [PMID: 31170290 DOI: 10.1093/eurheartj/ehz311] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Revised: 02/06/2019] [Accepted: 04/29/2019] [Indexed: 12/12/2022] Open
Abstract
AIMS Calmodulinopathies are rare life-threatening arrhythmia syndromes which affect mostly young individuals and are, caused by mutations in any of the three genes (CALM 1-3) that encode identical calmodulin proteins. We established the International Calmodulinopathy Registry (ICalmR) to understand the natural history, clinical features, and response to therapy of patients with a CALM-mediated arrhythmia syndrome. METHODS AND RESULTS A dedicated Case Report File was created to collect demographic, clinical, and genetic information. ICalmR has enrolled 74 subjects, with a variant in the CALM1 (n = 36), CALM2 (n = 23), or CALM3 (n = 15) genes. Sixty-four (86.5%) were symptomatic and the 10-year cumulative mortality was 27%. The two prevalent phenotypes are long QT syndrome (LQTS; CALM-LQTS, n = 36, 49%) and catecholaminergic polymorphic ventricular tachycardia (CPVT; CALM-CPVT, n = 21, 28%). CALM-LQTS patients have extremely prolonged QTc intervals (594 ± 73 ms), high prevalence (78%) of life-threatening arrhythmias with median age at onset of 1.5 years [interquartile range (IQR) 0.1-5.5 years] and poor response to therapies. Most electrocardiograms (ECGs) show late onset peaked T waves. All CALM-CPVT patients were symptomatic with median age of onset of 6.0 years (IQR 3.0-8.5 years). Basal ECG frequently shows prominent U waves. Other CALM-related phenotypes are idiopathic ventricular fibrillation (IVF, n = 7), sudden unexplained death (SUD, n = 4), overlapping features of CPVT/LQTS (n = 3), and predominant neurological phenotype (n = 1). Cardiac structural abnormalities and neurological features were present in 18 and 13 patients, respectively. CONCLUSION Calmodulinopathies are largely characterized by adrenergically-induced life-threatening arrhythmias. Available therapies are disquietingly insufficient, especially in CALM-LQTS. Combination therapy with drugs, sympathectomy, and devices should be considered.
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Affiliation(s)
- Lia Crotti
- Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy.,Istituto Auxologico Italiano, IRCCS, Laboratory of Cardiovascular Genetics, Milan, Italy.,Istituto Auxologico Italiano, IRCCS, Department of Cardiovascular, Neural and Metabolic Sciences, San Luca Hospital, Milan, Italy.,Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy.,Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart
| | - Carla Spazzolini
- Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy.,Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart
| | - David J Tester
- Division of Heart Rhythm Services, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA.,Division of Pediatric Cardiology, Department of Pediatric and Adolescent Medicine, Mayo Clinic, Rochester, MN, USA.,Windland Smith Rice Sudden Death Genomics Laboratory, Department of Molecular Pharmacology & Experimental Therapeutics, Mayo Clinic, Rochester, MN, USA
| | - Alice Ghidoni
- Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy.,Istituto Auxologico Italiano, IRCCS, Laboratory of Cardiovascular Genetics, Milan, Italy.,Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart
| | - Alban-Elouen Baruteau
- Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart.,L'Institut du Thorax, INSERM, CNRS, UNIV Nantes, CHU Nantes, Nantes, France.,Cardiology Clinical Academic Group, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | - Britt-Maria Beckmann
- Department of Medicine I, Klinikum Grosshadern, Ludwig-Maximilians University, Munich, Germany
| | - Elijah R Behr
- Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart.,Cardiology Clinical Academic Group, Molecular and Clinical Sciences Research Institute, St George's University of London, London, UK
| | | | - Connie R Bezzina
- Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart.,Amsterdam UMC, University of Amsterdam, Heart Center; Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Zahurul A Bhuiyan
- Unité de Recherche Cardiogénétique, Service de Médecine Génétique, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Alpay Celiker
- Department of Pediatric Cardiology, Koc University School of Medicine, Istanbul, Turkey
| | - Marina Cerrone
- Cardiovascular Genetics Program, Leon H. Charney Division of Cardiology, New York University School of Medicine, New York, NY, USA
| | - Federica Dagradi
- Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy.,Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart
| | - Gaetano M De Ferrari
- Division of Cardiology, "Città della Salute e della Scienza di Torino" Hospital, Department of Medical Sciences, University of Turin, Italy.,PhD Program in Translational Medicine, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Susan P Etheridge
- Division of Pediatric Cardiology, Department of Pediatrics, University of Utah and Primary Children's Hospital, Salt Lake City, UT, USA
| | - Meena Fatah
- The Labatt Family Heart Centre and Pediatrics (Cardiology), The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | - Pablo Garcia-Pavia
- Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart.,Inherited Cardiac Diseases Unit, Department of Cardiology, Hospital Universitario Puerta de Hierro, CIBERCV, Madrid, Spain.,University Francisco de Vitoria (UFV), Pozuelo de Alarcon, Spain
| | - Saleh Al-Ghamdi
- Cardiac Sciences Department, Section of Pediatric Cardiology, King Abdulaziz Cardiac Center, Ministry of National Guard Health Affairs, Riyadh, Saudi Arabia
| | - Robert M Hamilton
- The Labatt Family Heart Centre and Pediatrics (Cardiology), The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | - Zuhair N Al-Hassnan
- Cardiovascular Genetic Program, Department of Medical Genetics, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Minoru Horie
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Juan Jimenez-Jaimez
- Cardiology Department, Virgen de las Nieves University Hospital, Granada, Spain
| | | | - Juan P Kaski
- Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart.,Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London, UK.,Institute of Cardiovascular Science, University College London, London, UK
| | - Maria-Christina Kotta
- Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy.,Istituto Auxologico Italiano, IRCCS, Laboratory of Cardiovascular Genetics, Milan, Italy.,Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart
| | - Najim Lahrouchi
- Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart.,Amsterdam UMC, University of Amsterdam, Heart Center; Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Naomasa Makita
- National Cerebral and Cardiovascular Center, Research Institute and Omics Research Center, Osaka, Japan
| | - Gabrielle Norrish
- Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London, UK.,Institute of Cardiovascular Science, University College London, London, UK
| | - Hans H Odland
- Department of Pediatric Cardiology, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Seiko Ohno
- Department of Cardiovascular and Respiratory Medicine, Shiga University of Medical Science, Otsu, Japan.,Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - John Papagiannis
- Division of Cardiology, Children's Mercy Hospital, Kansas City, MO, USA
| | - Gianfranco Parati
- Istituto Auxologico Italiano, IRCCS, Department of Cardiovascular, Neural and Metabolic Sciences, San Luca Hospital, Milan, Italy.,Department of Medicine and Surgery, University of Milano-Bicocca, Milan, Italy
| | - Nicole Sekarski
- Paediatric Cardiology Unit, Lausanne University Hospital (CHUV), Lausanne, Switzerland
| | - Kristian Tveten
- Department of Medical Genetics, Telemark Hospital Trust, Skien, Norway
| | - Matteo Vatta
- Department of Medical and Molecular Genetics, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.,Invitae Corporation, San Francisco, CA, USA
| | - Gregory Webster
- Division of Cardiology, Ann and Robert H. Lurie Children's Hospital of Chicago, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Arthur A M Wilde
- Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart.,Amsterdam UMC, University of Amsterdam, Heart Center; Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Julianne Wojciak
- Department of Genomic Medicine, University of California San Francisco (UCSF), San Francisco, CA, USA
| | - Alfred L George
- Department of Pharmacology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Michael J Ackerman
- Division of Heart Rhythm Services, Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA
| | - Peter J Schwartz
- Istituto Auxologico Italiano, IRCCS, Center for Cardiac Arrhythmias of Genetic Origin, Milan, Italy.,Istituto Auxologico Italiano, IRCCS, Laboratory of Cardiovascular Genetics, Milan, Italy.,Member of the European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart-ERN GUARD-Heart
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Voskoboinik A, Hsia H, Moss J, Vedantham V, Tanel RE, Patel A, Wojciak J, Downs N, Scheinman MM. The many faces of early repolarization syndrome: A single-center case series. Heart Rhythm 2020; 17:273-281. [DOI: 10.1016/j.hrthm.2019.09.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Indexed: 01/23/2023]
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Hammami Bomholtz S, Refaat M, Buur Steffensen A, David J, Espinosa K, Nussbaum R, Wojciak J, Hjorth Bentzen B, Scheinman M, Schmitt N. Functional phenotype variations of two novel K
V
7.1 mutations identified in patients with Long QT syndrome. Pacing Clin Electrophysiol 2020; 43:210-216. [DOI: 10.1111/pace.13870] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 12/20/2019] [Accepted: 12/29/2019] [Indexed: 11/30/2022]
Affiliation(s)
- Sofia Hammami Bomholtz
- Danish National Research Foundation Centre for Cardiac ArrhythmiaUniversity of Copenhagen Copenhagen Denmark
- Department of Biomedical SciencesUniversity of Copenhagen Copenhagen Denmark
| | - Marwan Refaat
- Department of Internal Medicine, Division of CardiologyAmerican University of Beirut Medical Center Beirut Lebanon
- Department of Biochemistry and Molecular GeneticsAmerican University of Beirut Beirut Lebanon
| | - Annette Buur Steffensen
- Danish National Research Foundation Centre for Cardiac ArrhythmiaUniversity of Copenhagen Copenhagen Denmark
- Department of Biomedical SciencesUniversity of Copenhagen Copenhagen Denmark
| | - Jens‐Peter David
- Danish National Research Foundation Centre for Cardiac ArrhythmiaUniversity of Copenhagen Copenhagen Denmark
- Department of Biomedical SciencesUniversity of Copenhagen Copenhagen Denmark
| | - Karin Espinosa
- Danish National Research Foundation Centre for Cardiac ArrhythmiaUniversity of Copenhagen Copenhagen Denmark
- Department of Biomedical SciencesUniversity of Copenhagen Copenhagen Denmark
| | - Robert Nussbaum
- Department of MedicineUniversity of California, San Francisco San Francisco California
| | - Julianne Wojciak
- Department of MedicineUniversity of California, San Francisco San Francisco California
| | - Bo Hjorth Bentzen
- Danish National Research Foundation Centre for Cardiac ArrhythmiaUniversity of Copenhagen Copenhagen Denmark
- Department of Biomedical SciencesUniversity of Copenhagen Copenhagen Denmark
| | - Melvin Scheinman
- Department of MedicineUniversity of California, San Francisco San Francisco California
| | - Nicole Schmitt
- Danish National Research Foundation Centre for Cardiac ArrhythmiaUniversity of Copenhagen Copenhagen Denmark
- Department of Biomedical SciencesUniversity of Copenhagen Copenhagen Denmark
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Denti F, Bentzen BH, Wojciak J, Thomsen NM, Scheinman M, Schmitt N. Multiple genetic variations in sodium channel subunits in a case of sudden infant death syndrome. Pacing Clin Electrophysiol 2018; 41:620-626. [PMID: 29572929 DOI: 10.1111/pace.13328] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 02/15/2018] [Accepted: 02/25/2018] [Indexed: 12/20/2022]
Abstract
BACKGROUND Dysfunction of NaV 1.5 encoded by SCN5A accounts for approximately half of the channelopathic SIDS cases. We investigated the functional effect of two gene variants identified in the same patient, one in SCN5A and one in SCN1Bb. The aim of the study was to risk stratify the proband's family. METHODS The family was referred for cardiovascular genetic evaluation to assess familial risk of cardiac disease. Functional analysis of the identified variants was performed with patch-clamp electrophysiology in HEK293 cells. RESULTS A 16-month-old healthy boy died suddenly in the context of nonspecific illness and possible fever. Postmortem genetic testing revealed variants in the SCN5A and SCN1Bb genes. The proband's father carries the same variants but is asymptomatic. Electrophysiological analysis of the NaV 1.5_1281X truncation revealed complete loss-of-function of the channel. Coexpression of NaV 1.5 with NaV β1b significantly increased INa density when compared to NaV 1.5 alone. The NaV β1b _V268I variant abolished this INa density increase. Moreover, it shifted the activation curve toward more depolarized potentials. CONCLUSIONS Genetic variation of both sodium channel and its modifiers may contribute to sudden unexplained death in childhood. However, the asymptomatic father suggests that genetic variation of these genes is not sufficient to cause sudden death or clinically detectable SCN5A phenotypes.
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Affiliation(s)
- Federico Denti
- Danish National Research Foundation Centre for Cardiac Arrhythmia and Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Bo Hjorth Bentzen
- Danish National Research Foundation Centre for Cardiac Arrhythmia and Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Julianne Wojciak
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Nancy Mutsaers Thomsen
- Danish National Research Foundation Centre for Cardiac Arrhythmia and Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Melvin Scheinman
- Department of Medicine, University of California San Francisco, San Francisco, CA, USA
| | - Nicole Schmitt
- Danish National Research Foundation Centre for Cardiac Arrhythmia and Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
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Affiliation(s)
- Dana B Gal
- Department of Pediatrics, University of California, San Francisco, San Francisco, California
| | - Julianne Wojciak
- Department of Pediatric Cardiology, University of California, San Francisco, San Francisco, California
| | - Jennifer Perera
- Department of Pediatric Cardiology, University of California, San Francisco, San Francisco, California
| | - Ronn E Tanel
- Department of Pediatric Cardiology, University of California, San Francisco, San Francisco, California
| | - Akash R Patel
- Department of Pediatric Cardiology, University of California, San Francisco, San Francisco, California
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Roberts JD, Krahn AD, Ackerman MJ, Rohatgi RK, Moss AJ, Nazer B, Tadros R, Gerull B, Sanatani S, Wijeyeratne YD, Baruteau AE, Muir AR, Pang B, Cadrin-Tourigny J, Talajic M, Rivard L, Tester DJ, Liu T, Whitman IR, Wojciak J, Conacher S, Gula LJ, Leong-Sit P, Manlucu J, Green MS, Hamilton R, Healey JS, Lopes CM, Behr ER, Wilde AA, Gollob MH, Scheinman MM. Loss-of-Function
KCNE2
Variants. Circ Arrhythm Electrophysiol 2017; 10:CIRCEP.117.005282. [DOI: 10.1161/circep.117.005282] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 06/29/2017] [Indexed: 11/16/2022]
Affiliation(s)
| | | | | | | | | | - Babak Nazer
- For author affiliations, please see the Appendix
| | - Rafik Tadros
- For author affiliations, please see the Appendix
| | | | | | | | | | | | | | | | | | - Lena Rivard
- For author affiliations, please see the Appendix
| | | | - Taylor Liu
- For author affiliations, please see the Appendix
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Refaat M, Bomholtz S, Steffensen A, David J, Espinosa K, Bentzen B, Nussbaum R, Wojciak J, Scheinman M, Schmitt N. P5859Genotype-phenotype correlation of novel KV7.1 mutations identified in patients with Long QT syndrome. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Refaat MM, Tang P, Harfouch N, Wojciak J, Kwok PY, Scheinman M. Arrhythmogenic Right Ventricular Cardiomyopathy Caused by a Novel Frameshift Mutation. Card Electrophysiol Clin 2016; 8:217-21. [PMID: 26920198 DOI: 10.1016/j.ccep.2015.10.033] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Arrhythmogenic right ventricular cardiomyopathy is a rare cardiomyopathy that might be asymptomatic or symptomatic, causing palpations or syncope, and might lead to sudden cardiac death. It is recommended that physical exertion be reduced. It is also recommended that those with syncope and ventricular tachycardia/ventricular fibrillation have an implantable cardioverter-defibrillator placed. β-Blockers, antiarrhythmic drugs, and radiofrequency ablation should be used to control the ventricular arrhythmia burden in arrhythmogenic right ventricular cardiomyopathy.
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Affiliation(s)
- Marwan M Refaat
- Division of Cardiology, Department of Internal Medicine, American University of Beirut Medical Center, PO Box 11-0236, Riad el Solh, Beirut 1107.2020, Lebanon; Department of Biochemistry and Molecular Genetics, American University of Beirut, Beirut, Lebanon; Cardiac Electrophysiology, Cardiology, Department of Internal Medicine, American University of Beirut Faculty of Medicine and Medical Center, 3 Dag Hammarskjold Plaza, 8th Floor, New York, NY 10017, USA.
| | - Paul Tang
- Institute for Human Genetics, University of California, San Francisco, CA, USA
| | | | - Julianne Wojciak
- Division of Cardiology, Department of Medicine, University of California San Francisco Medical Center, San Francisco, CA, USA
| | - Pui-Yan Kwok
- Institute for Human Genetics, University of California, San Francisco, CA, USA
| | - Melvin Scheinman
- Division of Cardiology, Department of Medicine, University of California San Francisco Medical Center, San Francisco, CA, USA
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Spencer CI, Baba S, Nakamura K, Hua EA, Sears MAF, Fu CC, Zhang J, Balijepalli S, Tomoda K, Hayashi Y, Lizarraga P, Wojciak J, Scheinman MM, Aalto-Setälä K, Makielski JC, January CT, Healy KE, Kamp TJ, Yamanaka S, Conklin BR. Calcium transients closely reflect prolonged action potentials in iPSC models of inherited cardiac arrhythmia. Stem Cell Reports 2014; 3:269-81. [PMID: 25254341 PMCID: PMC4175159 DOI: 10.1016/j.stemcr.2014.06.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 06/02/2014] [Accepted: 06/03/2014] [Indexed: 12/12/2022] Open
Abstract
Long-QT syndrome mutations can cause syncope and sudden death by prolonging the cardiac action potential (AP). Ion channels affected by mutations are various, and the influences of cellular calcium cycling on LQTS cardiac events are unknown. To better understand LQTS arrhythmias, we performed current-clamp and intracellular calcium ([Ca(2+)]i) measurements on cardiomyocytes differentiated from patient-derived induced pluripotent stem cells (iPS-CM). In myocytes carrying an LQT2 mutation (HERG-A422T), APs and [Ca(2+)]i transients were prolonged in parallel. APs were abbreviated by nifedipine exposure and further lengthened upon releasing intracellularly stored Ca(2+). Validating this model, control iPS-CM treated with HERG-blocking drugs recapitulated the LQT2 phenotype. In LQT3 iPS-CM, expressing NaV1.5-N406K, APs and [Ca(2+)]i transients were markedly prolonged. AP prolongation was sensitive to tetrodotoxin and to inhibiting Na(+)-Ca(2+) exchange. These results suggest that LQTS mutations act partly on cytosolic Ca(2+) cycling, potentially providing a basis for functionally targeted interventions regardless of the specific mutation site.
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Affiliation(s)
- C Ian Spencer
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA
| | - Shiro Baba
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA; Departments of Medicine, Anatomy and Cellular and Molecular Pharmacology, University of California San Francisco, 500 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Kenta Nakamura
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA; Departments of Medicine, Anatomy and Cellular and Molecular Pharmacology, University of California San Francisco, 500 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Ethan A Hua
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA
| | - Marie A F Sears
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA
| | - Chi-cheng Fu
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA; Departments of Bioengineering, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA
| | - Jianhua Zhang
- Stem Cell and Regenerative Medicine Center, Cellular and Molecular Arrhythmia Research Program, University of Wisconsin School of Medicine and Public Health, 1111 Highland Avenue, Madison, WI 53792, USA
| | - Sadguna Balijepalli
- Stem Cell and Regenerative Medicine Center, Cellular and Molecular Arrhythmia Research Program, University of Wisconsin School of Medicine and Public Health, 1111 Highland Avenue, Madison, WI 53792, USA
| | - Kiichiro Tomoda
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA
| | - Yohei Hayashi
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA
| | - Paweena Lizarraga
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA
| | - Julianne Wojciak
- Departments of Medicine, Anatomy and Cellular and Molecular Pharmacology, University of California San Francisco, 500 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Melvin M Scheinman
- Departments of Medicine, Anatomy and Cellular and Molecular Pharmacology, University of California San Francisco, 500 Parnassus Avenue, San Francisco, CA 94143, USA
| | - Katriina Aalto-Setälä
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA; Institute of Biomedical Technology, University of Tampere, Biokatu 12, 33520 Tampere, Finland
| | - Jonathan C Makielski
- Stem Cell and Regenerative Medicine Center, Cellular and Molecular Arrhythmia Research Program, University of Wisconsin School of Medicine and Public Health, 1111 Highland Avenue, Madison, WI 53792, USA
| | - Craig T January
- Stem Cell and Regenerative Medicine Center, Cellular and Molecular Arrhythmia Research Program, University of Wisconsin School of Medicine and Public Health, 1111 Highland Avenue, Madison, WI 53792, USA
| | - Kevin E Healy
- Departments of Bioengineering, and Material Science and Engineering, University of California, Berkeley, CA 94720, USA
| | - Timothy J Kamp
- Stem Cell and Regenerative Medicine Center, Cellular and Molecular Arrhythmia Research Program, University of Wisconsin School of Medicine and Public Health, 1111 Highland Avenue, Madison, WI 53792, USA
| | - Shinya Yamanaka
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA; Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Bruce R Conklin
- Gladstone Institute of Cardiovascular Disease, 1650 Owens Street, San Francisco, CA 94158, USA; Departments of Medicine, Anatomy and Cellular and Molecular Pharmacology, University of California San Francisco, 500 Parnassus Avenue, San Francisco, CA 94143, USA.
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Refaat M, Steffensen AB, David JP, Mujezinovic A, Calloe K, Wojciak J, Nussbaum RL, Scheinman M, Schmitt N. HIGH INCIDENCE OF FUNCTIONAL ION CHANNEL ABNORMALITIES IN A CONSECUTIVE LONG QT SYNDROME COHORT WITH GENETIC VARIANTS OF UNKNOWN SIGNIFICANCE. J Am Coll Cardiol 2014. [DOI: 10.1016/s0735-1097(14)60444-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Calloe K, Refaat MM, Grubb S, Wojciak J, Campagna J, Thomsen NM, Nussbaum RL, Scheinman MM, Schmitt N. Characterization and mechanisms of action of novel NaV1.5 channel mutations associated with Brugada syndrome. Circ Arrhythm Electrophysiol 2013; 6:177-84. [PMID: 23424222 DOI: 10.1161/circep.112.974220] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND Brugada syndrome is a heterogeneous heart rhythm disorder characterized by an atypical right bundle block pattern with ST-segment elevation and T-wave inversion in the right precordial leads. Loss-of-function mutations in SCN5A encoding the cardiac sodium channel Na(V)1.5 are associated with Brugada syndrome. We found novel mutations in SCN5A in 2 different families diagnosed with Brugada syndrome and investigated how those affected Na(V)1.5 channel function. METHODS AND RESULTS We performed genetic testing of the probands' genomic DNA. After site-directed mutagenesis and transfection, whole-cell currents were recorded for Na(V)1.5 wild type and mutants heterologously expressed in Chinese hamster ovary-K1 cells. Proband 1 had two novel Na(V)1.5 mutations: Na(V)1.5-R811H and Na(V)1.5-R620H. The Na(V)1.5-R811H mutation showed a significant loss of function in peak Na(+) current density and alteration of biophysical kinetic parameters (inactivation and recovery from inactivation), whereas Na(V)1.5-R620H had no significant effect on the current. Proband 2 had a novel Na(V)1.5-S1218I mutation. Na(V)1.5-S1218I had complete loss of function, and 1:1 expression of Na(V)1.5-wild type and Na(V)1.5-S1218I mimicking the heterozygous state revealed a 50% reduction in current compared with wild type, suggesting a functional haploinsufficiency in the patient. CONCLUSIONS Na(V)1.5-S1218I and R811H are novel loss-of-function mutations in the SCN5A gene causing Brugada syndrome.
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Affiliation(s)
- Kirstine Calloe
- Danish National Research Foundation Centre for Cardiac Arrhythmia and Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Hong TT, Cogswell R, James CA, Kang G, Pullinger CR, Malloy MJ, Kane JP, Wojciak J, Calkins H, Scheinman MM, Tseng ZH, Ganz P, De Marco T, Judge DP, Shaw RM. Plasma BIN1 correlates with heart failure and predicts arrhythmia in patients with arrhythmogenic right ventricular cardiomyopathy. Heart Rhythm 2012; 9:961-7. [PMID: 22300662 DOI: 10.1016/j.hrthm.2012.01.024] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Indexed: 12/20/2022]
Abstract
BACKGROUND Arrhythmogenic right ventricular cardiomyopathy (ARVC) is a disorder involving diseased cardiac muscle. Bridging integrator 1 (BIN1) is a membrane-associated protein important to cardiomyocyte homeostasis and is downregulated in cardiomyopathy. We hypothesized that BIN1 could be released into the circulation and that blood-available BIN1 can provide useful data on the cardiac status of patients whose hearts are failing secondary to ARVC. OBJECTIVE To determine whether plasma BIN1 levels can be used to measure disease severity in patients with ARVC. METHODS We performed a retrospective cohort study of 24 patients with ARVC. Plasma BIN1 levels were assessed for their ability to correlate with cardiac functional status and predict ventricular arrhythmias. RESULTS Mean plasma BIN1 levels were decreased in patients with ARVC with heart failure (15 ± 7 vs 60 ± 17 in patients without heart failure, P <.05; the plasma BIN1 level was 60 ± 10 in non-ARVC normal controls). BIN1 levels correlated inversely with number of previous ventricular arrhythmia (R = -.47; P <.05), and low BIN1 levels correctly classified patients with advanced heart failure or ventricular arrhythmia (receiver operator curve area under the curve of 0.88 ± 0.07). Low BIN1 levels also predicted future ventricular arrhythmias (receiver operator curve area under the curve of 0.89 ± 0.09). In a stratified analysis, BIN1 levels could predict future arrhythmias in patients without severe heart failure (n = 20) with an accuracy of 82%. In the 7 patients with ARVC with serial blood samples, all of whom had evidence of disease progression during follow-up, plasma BIN1 levels decreased significantly (a decrease of 63%; P <.05). CONCLUSIONS Plasma BIN1 level seems to correlate with cardiac functional status and the presence or absence of sustained ventricular arrhythmias in a small cohort of patients with ARVC and can predict future ventricular arrhythmias.
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Affiliation(s)
- Ting-Ting Hong
- Cardiovascular Research Institute, University of California San Francisco, San Francisco, CA 94158, USA
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Calloe K, Refaat MM, Grubb S, Wojciak J, Carroll J, Thomsen NM, Nussbaum RL, Scheinman MM, Schmitt N. Characterization of 3 Novel Nav1.5 Channel Mutations Associated with the Brugada Syndrome. Biophys J 2012. [DOI: 10.1016/j.bpj.2011.11.2952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Meli AC, Refaat MM, Dura M, Reiken S, Wronska A, Wojciak J, Carroll J, Scheinman MM, Marks AR. A novel ryanodine receptor mutation linked to sudden death increases sensitivity to cytosolic calcium. Circ Res 2011; 109:281-90. [PMID: 21659649 DOI: 10.1161/circresaha.111.244970] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE Mutations in the cardiac type 2 ryanodine receptor (RyR2) have been linked to catecholaminergic polymorphic ventricular tachycardia (CPVT). CPVT-associated RyR2 mutations cause fatal ventricular arrhythmias in young individuals during β-adrenergic stimulation. OBJECTIVE This study sought to determine the effects of a novel RyR2-G230C mutation and whether this mutation and RyR2-P2328S alter the sensitivity of the channel to luminal calcium (Ca(2+)). METHODS AND RESULTS Functional characterizations of recombinant human RyR2-G230C channels were performed under conditions mimicking stress. Human RyR2 mutant channels were generated by site-directed mutagenesis and heterologously expressed in HEK293 cells together with calstabin2. RyR2 channels were measured to examine the regulation of the channels by cytosolic versus luminal sarcoplasmic reticulum Ca(2+). A 50-year-old white man with repeated syncopal episodes after exercise had a cardiac arrest and harbored the mutation RyR2-G230C. cAMP-dependent protein kinase-phosphorylated RyR2-G230C channels exhibited a significantly higher open probability at diastolic Ca(2+) concentrations, associated with a depletion of calstabin2. The luminal Ca(2+) sensitivities of RyR2-G230C and RyR2-P2328S channels were WT-like. CONCLUSIONS The RyR2-G230C mutant exhibits similar biophysical defects compared with previously characterized CPVT mutations: decreased binding of the stabilizing subunit calstabin2 and a leftward shift in the Ca(2+) dependence for activation under conditions that simulate exercise, consistent with a "leaky" channel. Both RyR2-G230C and RyR2-P2328S channels exhibit normal luminal Ca(2+) activation. Thus, diastolic sarcoplasmic reticulum Ca(2+) leak caused by reduced calstabin2 binding and a leftward shift in the Ca(2+) dependence for activation by diastolic levels of cytosolic Ca(2+) is a common mechanism underlying CPVT.
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Affiliation(s)
- Albano C Meli
- Department of Physiology and Cellular Biophysics, Clyde and Helen Wu Center for Molecular Cardiology, College of Physicians and Surgeons of Columbia University, New York, NY, USA
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