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01.12.2017 | Research | Ausgabe 1/2017 Open Access

Journal of Translational Medicine 1/2017

Multiple gene variations contributed to congenital heart disease via GATA family transcriptional regulation

Zeitschrift:
Journal of Translational Medicine > Ausgabe 1/2017
Autoren:
Yanyan Qian, Deyong Xiao, Xiao Guo, Hongbo Chen, Lili Hao, Xiaojing Ma, Guoying Huang, Duan Ma, Huijun Wang
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​s12967-017-1173-0) contains supplementary material, which is available to authorized users.
Yanyan Qian and Deyong Xiao contributed equally to this work

Abstract

Background

Congenital heart disease (CHD) is a common birth defect, and most cases occur sporadically. Mutations in key genes that are responsible for cardiac development could contribute to CHD. To date, the genetic causes of CHD remain largely unknown.

Methods

In this study, twenty-nine candidate genes in CHD were sequenced in 106 patients with Tetralogy of Fallot (TOF) using target exome sequencing (TES). The co-immunoprecipitation (CO-IP) and luciferase reporter gene assays were performed in HEK293T cells, and wild-type and mutant mRNA of ZFPM2 were microinjected into zebrafish embryos.

Results

Rare variants in key cardiac transcriptional factors and JAG1 were identified in the patients. Four patients carried multiple gene variants. The novel E1148K variant was located at the eighth Zinc-finger domain of FOG2 protein. The CO-IP assays in the HEK293T cells revealed that the variant significantly damaged the interaction between ZFPM2/FOG2 and GATA4. The luciferase reporter gene assays revealed that the E1148K mutant ZFPM2 protein displayed a significantly greater inhibition of the transcriptional activation of GATA4 than the wild-type protein. The wild-type mRNA and the E1148K mutant mRNA of ZFPM2 were injected into zebrafish embryos. At 48 hpf, in the mutant mRNA injection group, the number of embryos with an abnormal cardiac chamber structure and a loss of left–right asymmetry was increased. By 72 hpf, the defects in the chamber and left–right asymmetry became obvious.

Conclusions

We performed TES in sporadic TOF patients and identified rare variants in candidate genes in CHD. We first validated the E1148 K variant in ZFPM2, which is likely involved in the pathogenesis of CHD via GATA4. Moreover, our results suggest that TES could be a useful tool for discovering sequence variants in CHD patients.
Zusatzmaterial
Additional file 1: Table S1. Patients’ clinical characteristics.
Additional file 2: Table S2. Information of twenty-nine candidate genes.
Literatur
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