Variant Interpretation for Dilated Cardiomyopathy: Refinement of the American College of Medical Genetics and Genomics/ClinGen Guidelines for the DCM Precision Medicine Study
Open accessAbstract
Background: The hypothesis of the Dilated Cardiomyopathy Precision Medicine Study is that most dilated cardiomyopathy has a genetic basis. The study returns results to probands and, when indicated, to relatives. While both the American College of Medical Genetics and Genomics/Association for Molecular Pathology and ClinGen’s MYH7 -cardiomyopathy specifications provide relevant guidance for variant interpretation, further gene- and disease-specific considerations were required for dilated cardiomyopathy. To this end, we tailored the ClinGen MYH7 -cardiomyopathy variant interpretation framework; the specifications implemented for the study are presented here. Methods: Modifications were created and approved by an external Variant Adjudication Oversight Committee. After a pilot using 81 probands, further adjustments were made, resulting in 27 criteria (9 modifications of the ClinGen MYH7 framework and reintroduction of 2 American College of Medical Genetics and Genomics/Association of Molecular Pathology criteria that were deemed not applicable by the ClinGen MYH7 working group). Results: These criteria were applied to 2059 variants in a test set of 97 probands. Variants were classified as benign (n=1702), likely benign (n=33), uncertain significance (n=71), likely pathogenic (likely pathogenic; n=12), and pathogenic (P; n=3). Only 2/15 likely pathogenic/P variants were identified in Non-Hispanic African ancestry probands. Conclusions: We tailored the ClinGen MYH7 criteria for our study. Our preliminary data show that 15/97 (15.5%) probands have likely pathogenic/P variants, most of which were identified in probands of Non-Hispanic European ancestry. We anticipate continued evolution of our approach, one that will be informed by new insights on variant interpretation and a greater understanding of the genetic architecture of dilated cardiomyopathy. Clinical Trial Registration: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03037632
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- Authors
- Morales, A., Kinnamon, D. D., Jordan, E., Platt, J., Vatta, M., Dorschner, M. O., Starkey, C. A., Mead, J. O., Ai, T., Burke, W., Gastier-Foster, J., Jarvik, G. P., Rehm, H. L., Nickerson, D. A., Hershberger, R. E., on behalf of the DCM Precision Medicine study of the DCM Consortium, Bowen, D. J., Haas, G., Abraham, W. T., Binkley, P. F., Hasan, A., Host, J., Lampert, B., Smith, S., Huggins, G. S., DeNofrio, D. D., Kiernan, M., Fishbein, D., Cheng, R., Dardas, T., Levy, W., Mahr, C., Masri, S., Stempien-Otero, A., Gottlieb (Ste Pl), S. S., Wheeler, M., Ashley, E., Hofmeyer, M., Tang, W. H. W., Starling, R., Owens, A., Marguilies, K. B., Cappola, T., Goldberg, L. R., McLean, R., Moore, C. K., Long, R. C., Jimenez Carcamo, J., Trachtenberg, B., Ashrith, G., Bhimarahj, A., Sweitzer, N. K., Shah, P., Lowes, B., Stoller, D., Smart, F., Morris, A. A., Wilcox, J., Pan, S., Ewald, G. A., Aaronson, K. D., Wang, J. J., Pamboukian, S., Judge, D. P., Kransdorf, E. P., Garg, S., Desvigne- Nickens, P., Troendle, J., Fu, Y.-P., & Hindorff, L.
- Affiliations
- The Ohio State University (US)
- Stanford University (US)
- Invitae (United States) (US)
- University of Washington (US)
- Institute for Genomic Medicine, Nationwide Children’s Hospital, Columbus, OH (J.G.-F.).
- Broad Institute (US)
- ORCID
- Morales, Ana
- Kinnamon, Daniel D.
- Jordan, Elizabeth
- Platt, Julia
- Vatta, Matteo
- Starkey, Carl A.
- Mead, Jonathan O.
- Ai, Tomohiko
- Burke, Wylie
- Jarvik, Gail P.
- Rehm, Heidi L.
- Nickerson, Deborah A.
- Hershberger, Ray E.
- Bowen, Deborah J.
- Haas, Garrie
- Abraham, William T.
- Binkley, Philip F.
- Hasan, Ayesha
- Lampert, Brent
- Smith, Sakima
- Huggins, Gordon S.
- DeNofrio, David D.
- Kiernan, Michael
- Cheng, Richard
- Dardas, Todd
- Levy, Wayne
- Mahr, Claudius
- Masri, Sofia
- Wheeler, Matthew
- Ashley, Euan
- Hofmeyer, Mark
- Tang, W.H. Wilson
- Owens, Anjali
- Cappola, Thomas
- Goldberg, Lee R.
- McLean, Rhondalyn
- Trachtenberg, Barry
- Sweitzer, Nancy K.
- Shah, Palak
- Lowes, Brian
- Stoller, Douglas
- Smart, Frank
- Morris, Alanna A.
- Wilcox, Jane
- Ewald, Gregory A.
- Aaronson, Keith D.
- Wang, Jessica J.
- Pamboukian, Salpy
- Judge, Daniel P.
- Kransdorf, Evan P.
- Garg, Sonia
- Troendle, James
- Hindorff, Lucia
- Venue
- Circulation: Genomic and Precision Medicine
- Published
- 2020-04
- Volume
- 13
- Issue
- 2
- Pages
- e002480-e002480
- ISSN
- 2574-8300 (ISSN-L)
- PMC
- PMC8070981
- OpenAlex
- W3018268201
- Cited by
- 114
- References
- 42
- Citations by year
- 2026: 11 · 2025: 16 · 2024: 20 · 2023: 25 · 2022: 19 · 2021: 14 · 2020: 9
- FWCI
- 9.82
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Circulation Genomic and Precision Medicine (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- Ohio State University
- Japan Society for the Promotion of Science (18K08900)
- National Heart, Lung, and Blood Institute (R01HL128857)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiomyopathy and Myosin Studies
- Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac electrophysiology and arrhythmias
- Keywords
- dilated cardiomyopathy, variant interpretation, MYH7, ACMG/AMP criteria, genetic ancestry, pathogenic variant classification, precision medicine, genetic testing
- MeSH terms
- Cardiomyopathy, Dilated, Genetic Testing, Genetics, Medical, Humans, Mutation, United States, Genetic Variation, Practice Guidelines as Topic, Genetic Predisposition to Disease, Genomics, Precision Medicine
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