Open AccessA novel de novo dominant mutation of NOTCH1 gene in an Iranian family with non‐syndromic congenital heart disease
Author(s) -
Kalayinia Samira,
Maleki Majid,
Mahdavi Mohammad,
Mahdieh Nejat
Publication year - 2020
Publication title -
journal of clinical laboratory analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 50
eISSN - 1098-2825
pISSN - 0887-8013
DOI - 10.1002/jcla.23147
Subject(s) - sanger sequencing , genetics , missense mutation , exome sequencing , dbsnp , biology , candidate gene , mutation , exome , gene , disease , consanguinity , medicine , single nucleotide polymorphism , genotype
Background Congenital heart disease (CHD) is the most common birth defect which can arises from different genetic defects. The genetic heterogeneity of this disease leads to restricted success in candidate genes screening method. Emerging approaches such as next‐generation sequencing (NGS)‐based genetic analysis might provide a better understating of CHD etiology in the patients who are left undiagnosed. To this aim, in this study, we survived the causes of CHD in an Iranian family who was consanguineous and had two affected children. Methods Affected individuals of this family were checked previously by PCR‐direct sequencing for six candidate genes ( NKX2‐5, ZIC3, NODAL, FOXH1, GJA1, GATA4 ) and had not revealed any reported CHD causative mutations. Whole‐exome sequencing (WES) was performed on this family probond to determine the underlying cause of CHD, and the identified variants were confirmed and segregated by Sanger sequencing. Results We identified one heterozygous missense mutation, c.T6797C (p.Phe2266Ser), in the NOTCH1 gene, which seems to be the most probably disease causing of this family patients. This mutation was found to be novel and not reported on 1000 Genomes Project, dbSNP, and ExAC. Conclusion Worldwide, mutations in NOTCH1 gene are considered as one of the most known causes of CHD. The found NOTCH1 variant in this family affected individuals was the first report from Iran. Yet again, this result indicates the importance of NOTCH1 screening in CHD patients.