1
|
Mitina A, Khan M, Lesurf R, Yin Y, Engchuan W, Hamdan O, Pellecchia G, Trost B, Backstrom I, Guo K, Pallotto LM, Lam Doong PH, Wang Z, Nalpathamkalam T, Thiruvahindrapuram B, Papaz T, Pearson CE, Ragoussis J, Subbarao P, Azad MB, Turvey SE, Mandhane P, Moraes TJ, Simons E, Scherer SW, Lougheed J, Mondal T, Smythe J, Altamirano-Diaz L, Oechslin E, Mital S, Yuen RKC. Genome-wide enhancer-associated tandem repeats are expanded in cardiomyopathy. EBioMedicine 2024; 101:105027. [PMID: 38418263 PMCID: PMC10944212 DOI: 10.1016/j.ebiom.2024.105027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 02/05/2024] [Accepted: 02/06/2024] [Indexed: 03/01/2024] Open
Abstract
BACKGROUND Cardiomyopathy is a clinically and genetically heterogeneous heart condition that can lead to heart failure and sudden cardiac death in childhood. While it has a strong genetic basis, the genetic aetiology for over 50% of cardiomyopathy cases remains unknown. METHODS In this study, we analyse the characteristics of tandem repeats from genome sequence data of unrelated individuals diagnosed with cardiomyopathy from Canada and the United Kingdom (n = 1216) and compare them to those found in the general population. We perform burden analysis to identify genomic and epigenomic features that are impacted by rare tandem repeat expansions (TREs), and enrichment analysis to identify functional pathways that are involved in the TRE-associated genes in cardiomyopathy. We use Oxford Nanopore targeted long-read sequencing to validate repeat size and methylation status of one of the most recurrent TREs. We also compare the TRE-associated genes to those that are dysregulated in the heart tissues of individuals with cardiomyopathy. FINDINGS We demonstrate that tandem repeats that are rarely expanded in the general population are predominantly expanded in cardiomyopathy. We find that rare TREs are disproportionately present in constrained genes near transcriptional start sites, have high GC content, and frequently overlap active enhancer H3K27ac marks, where expansion-related DNA methylation may reduce gene expression. We demonstrate the gene silencing effect of expanded CGG tandem repeats in DIP2B through promoter hypermethylation. We show that the enhancer-associated loci are found in genes that are highly expressed in human cardiomyocytes and are differentially expressed in the left ventricle of the heart in individuals with cardiomyopathy. INTERPRETATION Our findings highlight the underrecognized contribution of rare tandem repeat expansions to the risk of cardiomyopathy and suggest that rare TREs contribute to ∼4% of cardiomyopathy risk. FUNDING Government of Ontario (RKCY), The Canadian Institutes of Health Research PJT 175329 (RKCY), The Azrieli Foundation (RKCY), SickKids Catalyst Scholar in Genetics (RKCY), The University of Toronto McLaughlin Centre (RKCY, SM), Ted Rogers Centre for Heart Research (SM), Data Sciences Institute at the University of Toronto (SM), The Canadian Institutes of Health Research PJT 175034 (SM), The Canadian Institutes of Health Research ENP 161429 under the frame of ERA PerMed (SM, RL), Heart and Stroke Foundation of Ontario & Robert M Freedom Chair in Cardiovascular Science (SM), Bitove Family Professorship of Adult Congenital Heart Disease (EO), Canada Foundation for Innovation (SWS, JR), Canada Research Chair (PS), Genome Canada (PS, JR), The Canadian Institutes of Health Research (PS).
Collapse
Affiliation(s)
- Aleksandra Mitina
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Mahreen Khan
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; Department of Molecular Genetics, University of Toronto; Toronto, Ontario, Canada
| | - Robert Lesurf
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Yue Yin
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Worrawat Engchuan
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Omar Hamdan
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Giovanna Pellecchia
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Brett Trost
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Ian Backstrom
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Keyi Guo
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Linda M Pallotto
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Phoenix Hoi Lam Doong
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Zhuozhi Wang
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Thomas Nalpathamkalam
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Bhooma Thiruvahindrapuram
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada
| | - Tanya Papaz
- Ted Rogers Centre for Heart Research; Toronto, Ontario, Canada; Division of Cardiology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto; Toronto, Ontario, Canada
| | - Christopher E Pearson
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; Department of Molecular Genetics, University of Toronto; Toronto, Ontario, Canada
| | - Jiannis Ragoussis
- McGill Genome Centre, Victor Phillip Dahdaleh Institute of Genomic Medicine, McGill University, Montreal, Quebec, Canada
| | - Padmaja Subbarao
- Department of Paediatrics, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Department of Physiology, University of Toronto, Toronto, Ontario, Canada; Program in Translation Medicine & Division of Respiratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Meghan B Azad
- Department of Pediatrics and Child Health, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Stuart E Turvey
- Department of Pediatrics, BC Children's Hospital, University of British Columbia, Vancouver, British Columbia, Canada
| | - Piushkumar Mandhane
- Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Theo J Moraes
- Department of Paediatrics, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada; Program in Translation Medicine & Division of Respiratory Medicine, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Elinor Simons
- Department of Pediatrics and Child Health, Section of Allergy and Clinical Immunology, University of Manitoba, Winnipeg, Manitoba, Canada; Children's Hospital Research Institute of Manitoba, Winnipeg, Manitoba, Canada
| | - Stephen W Scherer
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada; Department of Molecular Genetics and McLaughlin Centre, University of Toronto, Toronto, Ontario, Canada
| | - Jane Lougheed
- Division of Cardiology, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Tapas Mondal
- Division of Cardiology, Department of Pediatrics, McMaster Children's Hospital, Hamilton, Ontario, Canada
| | - John Smythe
- Division of Cardiology, Department of Pediatrics, Kingston General Hospital, Kingston, Ontario, Canada
| | - Luis Altamirano-Diaz
- Division of Cardiology, Department of Pediatrics, London Health Sciences Centre, London, Ontario, Canada
| | - Erwin Oechslin
- Division of Cardiology, Toronto Adult Congenital Heart Disease Program at Peter Munk Cardiac Centre, Department of Medicine, University Health Network, and University of Toronto, Toronto, Ontario, Canada
| | - Seema Mital
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; Ted Rogers Centre for Heart Research; Toronto, Ontario, Canada; Division of Cardiology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto; Toronto, Ontario, Canada.
| | - Ryan K C Yuen
- Genetics and Genome Biology, The Hospital for Sick Children; Toronto, Ontario, Canada; Department of Molecular Genetics, University of Toronto; Toronto, Ontario, Canada; The Centre for Applied Genomics, The Hospital for Sick Children; Toronto, Ontario, Canada.
| |
Collapse
|