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@unpublished{Mazzarotto:2020:10.1101/2020.01.03.19015602,
author = {Mazzarotto, F and Hawley, M and Beltrami, M and Beekman, L and Boschi, B and Girolami, F and Roberts, A and Lodder, E and Cerbai, E and Cook, S and Ware, J and Funke, B and Olivotto, I and Bezzina, C and Barton, PJR and Walsh, R},
doi = {10.1101/2020.01.03.19015602},
publisher = {bioRxiv},
title = {The genetic architecture of left ventricular non-compaction reveals both substantial overlap with other cardiomyopathies and a distinct aetiology in a subset of cases},
url = {http://dx.doi.org/10.1101/2020.01.03.19015602},
year = {2020}
}

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TY  - UNPB
AB  - Rationale: Left ventricular non-compaction (LVNC) is a condition characterised by trabeculations in the myocardial wall and is the subject of considerable conjecture as to whether it represents a distinct pathology or a secondary phenotype associated with other cardiac diseases, particularly cardiomyopathies. Objective: To investigate the genetic architecture of LVNC by identifying genes and variant classes robustly associated with disease and comparing these to other genetically characterised cardiomyopathies. Methods and Results: We performed rare variant association analysis using six different LVNC cohorts comprising 840 cases together with 125,748 gnomAD population controls and compared results to similar analyses with dilated cardiomyopathy (DCM) and hypertrophic cardiomyopathy (HCM) cases. We observed substantial overlap in genes and variant classes enriched in LVNC and DCM/HCM, indicating that in many cases LVNC belongs to a spectrum of more established cardiomyopathies, with non-compaction representing a phenotypic variation in patients with DCM- or HCM-causing variants. In contrast, five variant classes were uniquely enriched in LVNC cases, of which truncating variants in MYH7, ACTN2 and PRDM16 may represent a distinct LVNC aetiology. MYH7 truncating variants are generally considered as non-pathogenic but were detected in 2% of LVNC cases compared to 0.1% of controls, including a cluster of variants around a single splice region. Additionally, structural variants (exon deletions) in RYR2 and missense variants in the transmembrane region of HCN4 were enriched in LVNC cases, confirming prior reports regarding the association of these variant classes with combined LVNC and arrhythmia phenotypes. Conclusions: We demonstrated that genetic association analysis can clarify the relationship between LVNC and established cardiomyopathies, highlighted substantial overlap with DCM/HCM but also identified variant classes associated with distinct LVNC and with joint LVN
AU  - Mazzarotto,F
AU  - Hawley,M
AU  - Beltrami,M
AU  - Beekman,L
AU  - Boschi,B
AU  - Girolami,F
AU  - Roberts,A
AU  - Lodder,E
AU  - Cerbai,E
AU  - Cook,S
AU  - Ware,J
AU  - Funke,B
AU  - Olivotto,I
AU  - Bezzina,C
AU  - Barton,PJR
AU  - Walsh,R
DO  - 10.1101/2020.01.03.19015602
PB  - bioRxiv
PY  - 2020///
TI  - The genetic architecture of left ventricular non-compaction reveals both substantial overlap with other cardiomyopathies and a distinct aetiology in a subset of cases
UR  - http://dx.doi.org/10.1101/2020.01.03.19015602
UR  - https://www.medrxiv.org/content/10.1101/2020.01.03.19015602v2
UR  - http://hdl.handle.net/10044/1/82587
ER  -

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