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. 2022 Jan 21;130(2):166-180.
doi: 10.1161/CIRCRESAHA.120.317107. Epub 2021 Dec 10.

Common Genetic Variants Contribute to Risk of Transposition of the Great Arteries

Doris Škorić-Milosavljević #  1   2 Rafik Tadros #  1   3 Fernanda M Bosada #  4 Federico Tessadori #  5 Jan Hendrik van Weerd  4 Odilia I Woudstra  1   6 Fleur V Y Tjong  1 Najim Lahrouchi  1 Fanny Bajolle  7 Heather J Cordell  8 A J Agopian  9 Gillian M Blue  10 Daniela Q C M Barge-Schaapveld  11 Marc Gewillig  12 Christoph Preuss  13   14 Elisabeth M Lodder  1   2 Phil Barnett  4 Aho Ilgun  4 Leander Beekman  1 Karel van Duijvenboden  4 Regina Bokenkamp  15 Martina Müller-Nurasyid  16   17   18 KORA-Study GroupHubert W Vliegen  19 Thelma C Konings  20 Joost P van Melle  21 Arie P J van Dijk  22 Roland R J van Kimmenade  22   23 Jolien W Roos-Hesselink  24 Gertjan T Sieswerda  6 Folkert Meijboom  6 Hashim Abdul-Khaliq  25 Felix Berger  26   27 Sven Dittrich  28 Marc-Phillip Hitz  29   30 Julia Moosmann  28 Frank-Thomas Riede  31 Stephan Schubert  7   32 Pilar Galan  33 Mark Lathrop  34 Hans M Munter  34 Ammar Al-Chalabi  35 Christopher E Shaw  36   37 Pamela J Shaw  38 Karen E Morrison  39 Jan H Veldink  40 Leonard H van den Berg  40 Sylvia Evans  41 Marcelo A Nobrega  42 Ivy Aneas  42 Milena Radivojkov-Blagojević  43 Thomas Meitinger  43   44 Erwin Oechslin  45 Tapas Mondal  46 Lynn Bergin  47 John F Smythe  48 Luis Altamirano-Diaz  49 Jane Lougheed  50 Berto J Bouma  1 Marie-A Chaix  3 Jennie Kline  51 Anne S Bassett  52   53 Gregor Andelfinger  13 Roel L F van der Palen  15 Patrice Bouvagnet  54 Sally-Ann B Clur  55   56 Jeroen Breckpot  5   57 Wilhelmina S Kerstjens-Frederikse  58 David S Winlaw  10 Ulrike M M Bauer  59 Seema Mital  60 Elizabeth Goldmuntz  61 Bernard Keavney  62 Damien Bonnet  26 Barbara J Mulder  1 Michael W T Tanck  63 Jeroen Bakkers  64 Vincent M Christoffels  4 Cornelis J Boogerd  5 Alex V Postma #  2   4 Connie R Bezzina #  1
Affiliations

Common Genetic Variants Contribute to Risk of Transposition of the Great Arteries

Doris Škorić-Milosavljević et al. Circ Res. .

Abstract

Rationale: Dextro-transposition of the great arteries (D-TGA) is a severe congenital heart defect which affects approximately 1 in 4,000 live births. While there are several reports of D-TGA patients with rare variants in individual genes, the majority of D-TGA cases remain genetically elusive. Familial recurrence patterns and the observation that most cases with D-TGA are sporadic suggest a polygenic inheritance for the disorder, yet this remains unexplored.

Objective: We sought to study the role of common single nucleotide polymorphisms (SNPs) in risk for D-TGA.

Methods and results: We conducted a genome-wide association study in an international set of 1,237 patients with D-TGA and identified a genome-wide significant susceptibility locus on chromosome 3p14.3, which was subsequently replicated in an independent case-control set (rs56219800, meta-analysis P=8.6x10-10, OR=0.69 per C allele). SNP-based heritability analysis showed that 25% of variance in susceptibility to D-TGA may be explained by common variants. A genome-wide polygenic risk score derived from the discovery set was significantly associated to D-TGA in the replication set (P=4x10-5). The genome-wide significant locus (3p14.3) co-localizes with a putative regulatory element that interacts with the promoter of WNT5A, which encodes the Wnt Family Member 5A protein known for its role in cardiac development in mice. We show that this element drives reporter gene activity in the developing heart of mice and zebrafish and is bound by the developmental transcription factor TBX20. We further demonstrate that TBX20 attenuates Wnt5a expression levels in the developing mouse heart.

Conclusions: This work provides support for a polygenic architecture in D-TGA and identifies a susceptibility locus on chromosome 3p14.3 near WNT5A. Genomic and functional data support a causal role of WNT5A at the locus.

Keywords: Wnt-5a protein; congenital heart disease; genome-wide association study; single nucleotide polymorphism; transposition of great vessels.

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Figures

Figure 1.
Figure 1.
Manhattan plots of the genome-wide association results. P of all tested single nucleotide polymorphisms (SNPs) on a –log10 scale from the logistic regression analysis in the discovery set including 1094 cases and 3282 controls (A) and the meta-analysis of the discovery and replication set including 1237 cases and 3711 controls (B). Dashed lines represent genome-wide significance P thresholds of 5×10−8. C, Regional association plot of the 3p14.3 locus and surrounding genes (±500 kb). The y-axis represent the −log10(P) values from the meta-analysis. Round points represent SNPs in this region, colored by degree of linkage disequilibrium with rs56219800, the top associated SNP (purple point). The blue highlighted region represents the size of the locus, as defined by all SNPs with an r2≥0.5 with the lead SNP and that showed an association P of <10−3.
Figure 2.
Figure 2.
Functional annotation of the 3p14.3 locus. From top to bottom: Hi-C data from the human lymphobastoid line GM12878; TADs derived from iPSC-CMs; RefSeq genes; results from the TGA genome-wide association studies meta-analysis on a –log10(P) scale; human EMERGE track; Genomic Evolutionary Rate Profiling (GERP) conservation track. The blue highlighted region represents the genome-wide associated 3p14.3 locus near WNT5A.
Figure 3.
Figure 3.
Characterization of RE1 in mouse and zebrafish. A, Genome browser view from the mouse orthologous Wnt5a genomic region. ChIP-seq tracks of TBX20 and H3K27Ac are displayed below. B, Representative embryos showing that RE1-lacZ reporter expression is observed in the developing murine heart, including outflow tract myocardium and ventricles. In total, 5 embryos were analyzed. A, atrium; V, ventricle; OFT, outflow tract. C, Representative image of 2dpf zebrafish showing RE1 activity in various organs and tissues, including the heart. In total, 296 embryos were analyzed. White dashed lines represent boundaries of ventricle and atrium. v: ventricle; a: atrium. D, TBX20 ChIP-Seq demonstrating RE1 to be bound by TBX20. E, Expression levels (average normalized read counts and SD) of Wnt5a and flanking genes in E11.5 FACS sorted cardiomyocytes from control (n=4) and cTnT-Cre;Tbx20 mutant murine hearts (n=4), *P=0.04, using limma adjusted for multiple testing using Benjamini-Hochberg correction.
Figure 4.
Figure 4.
Regulatory activity of RE1 for the 3 major human haplotypes in vitro. A, Genome browser view from the human RE1 region (ie, chr3:55,605,229-55,607,027; GRCh37), depicting the location and characteristics of the single nucleotide polymorphisms (SNPs) within RE1 and the 3 major haplotypes. Provided r2 and D-prime are in relationship to the lead SNP rs56219800. B, Luciferase activity were measured in HL1 cells transfected with constructs for RE1 haplotype 1 (n=4), haplotype 2 (n=8), and haplotype 3 (n=4). Values were normalized to the activity of empty pGL4-SCP1-luc. *P=2.6×10−5, **P=2.6×10−6 (1-way ANOVA). C, TBX20 motif sequence as identified by HOMER motif analysis showing rs79492708 abolishes a TBX20-binding site.

Comment in

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