Whole exome sequencing identifies a mutation in EYA1 and GLI3 in a patient with branchio‑otic syndrome and esophageal atresia: Coincidence or a digenic mode of inheritance?

Kause,Franziska; Reutter,Heiko; Marsch,Florian; Thiele,Holger; Altmüller,Janine; Ludwig,Michael; Zhang,Rong

doi:10.3892/mmr.2017.8196

February-2018 Volume 17 Issue 2

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February-2018 Volume 17 Issue 2

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Article

Whole exome sequencing identifies a mutation in EYA1 and GLI3 in a patient with branchio‑otic syndrome and esophageal atresia: Coincidence or a digenic mode of inheritance?

Authors:
- Franziska Kause
- Heiko Reutter
- Florian Marsch
- Holger Thiele
- Janine Altmüller
- Michael Ludwig
- Rong Zhang
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Affiliations: Institute of Human Genetics, University Hospital of Bonn, D‑53127 Bonn, Germany, Cologne Center for Genomics, University of Cologne, D‑50931 Cologne, Germany, Department of Clinical Chemistry and Clinical Pharmacology, University Hospital of Bonn, D‑53127 Bonn, Germany
Pages: 3200-3205
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Published online on: December 6, 2017

https://doi.org/10.3892/mmr.2017.8196
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Abstract

Branchio‑otic (BO) syndrome is a clinically and genetically heterogeneous disorder that presents with variable branchial arch and otic anomalies. Dominant mutations in the human homologues of the Drosophila eyes absent (EYA1) gene, and the Drosophila sine oculis homeobox 1 and 5 (SIX1 and SIX5, respectively) genes have been causally associated with BO syndrome. Esophageal atresia (EA), with or without tracheo‑esophageal fistula (TEF), is the most common type of malformation of the upper digestive tract. To date, its causes are poorly understood. The present study investigated a family with three affected members who all presented with classic BO associated symptoms. Notably, the index patient also presented with the most common EA/TEF subtype type 3b. Whole exome sequencing (WES) was performed in the index patient, and prioritized genetic variants and their segregation in the family were analyzed by Sanger sequencing. WES demonstrated a known disease‑causing heterozygous EYA1 splice variant in the patient, as well as his sister and mother; all of whom were affected with BO syndrome. A further GLI family zinc finger 3 (GLI3) splice variant of unknown significance, inherited from the unaffected father, was also detected in the index patient. EYA1 and GLI3 are involved in the Sonic Hedgehog transcriptional network and GLI3 seems to be involved in human foregut malformations. Therefore, one may hypothesize a digenic inheritance model involving EYA1 and GLI3, where the effect of the GLI3 variant observed here only emerges in the background of the EYA1 defect.

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Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

Whole exome sequencing identifies a mutation in EYA1 and GLI3 in a patient with branchio‑otic syndrome and esophageal atresia: Coincidence or a digenic mode of inheritance?

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