Abstract:
:Congenital bicuspid aortic valve (BAV) represents the most common type of cardiac birth defect affecting 0.4‑2% of the general population, and accounts for a markedly increased incidence of life‑threatening complications, including valvulopathy and aortopathy. Accumulating evidence has demonstrated the genetic basis of BAV. However, the genetic basis for BAV in the majority of cases remains to be elucidated. In the present study, the coding regions and splicing donors/acceptors of the nuclear receptor subfamily 2 group F member 2 (NR2F2) gene, which encodes a transcription factor essential for proper cardiovascular development, were sequenced in 176 unrelated cases of congenital BAV. The available family members of the proband carrying an identified NR2F2 mutation and 280 unrelated, sex‑ and ethnicity‑matched healthy individuals as controls were additionally genotyped for NR2F2. The functional effect of the mutation was characterized using a dual‑luciferase reporter assay system. As a result, a novel heterozygous NR2F2 mutation, NM_021005.3: c.288C>A; p.(Cys96*), was identified in a family with BAV, which was transmitted in an autosomal dominant mode with complete penetrance. The nonsense mutation was absent from the 560 control chromosomes. Functional analysis identified that the mutant NR2F2 protein had no transcriptional activity. Furthermore, the mutation disrupted the synergistic transcriptional activation between NR2F2 and transcription factor GATA‑4, another transcription factor that is associated with BAV. These findings suggested NR2F2 as a novel susceptibility gene of human BAV, which reveals a novel molecular pathogenesis underpinning BAV.
journal_name
Int J Mol Medjournal_title
International journal of molecular medicineauthors
Wang J,Abhinav P,Xu YJ,Li RG,Zhang M,Qiu XB,Di RM,Qiao Q,Li XM,Huang RT,Xue S,Yang YQdoi
10.3892/ijmm.2019.4087subject
Has Abstractpub_date
2019-04-01 00:00:00pages
1839-1846issue
4eissn
1107-3756issn
1791-244Xjournal_volume
43pub_type
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