Pathogenetics of alveolar capillary dysplasia with misalignment of pulmonary veins

Przemyslaw Szafranski , Tomasz Gambin , Avinash V. Dharmadhikari

Abstract

Alveolar capillary dysplasia with misalignment of pulmonary veins (ACDMPV) is a lethal lung developmental disorder caused by heterozygous point mutations or genomic deletion copy-number variants (CNVs) of FOXF1 or its upstream enhancer involving fetal lung-expressed long noncoding RNA genes LINC01081 and LINC01082. Using custom-designed array comparative genomic hybridization, Sanger sequencing, whole exome sequencing (WES), and bioinformatic analyses, we studied 22 new unrelated families (20 postnatal and two prenatal) with clinically diagnosed ACDMPV. We describe novel deletion CNVs at the FOXF1 locus in 13 unrelated ACDMPV patients. Together with the previously reported cases, all 31 genomic deletions in 16q24.1, pathogenic for ACDMPV, for which parental origin was determined, arose de novo with 30 of them occurring on the maternally inherited chromosome 16, strongly implicating genomic imprinting of the FOXF1 locus in human lungs. Surprisingly, we have also identified four ACDMPV families with the pathogenic variants in the FOXF1 locus that arose on paternal chromosome 16. Interestingly, a combination of the severe cardiac defects, including hypoplastic left heart, and single umbilical artery were observed only in children with deletion CNVs involving FOXF1 and its upstream enhancer. Our data demonstrate that genomic imprinting at 16q24.1 plays an important role in variable ACDMPV manifestation likely through long-range regulation of FOXF1 expression, and may be also responsible for key phenotypic features of maternal uniparental disomy 16. Moreover, in one family, WES revealed a de novo missense variant in ESRP1, potentially implicating FGF signaling in the etiology of ACDMPV.
Collective authorPrzemyslaw Szafranski, Tomasz Gambin, Avinash V. Dharmadhikari, Kadir Caner Akdemir, Shali.....
Author Przemyslaw Szafranski - Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA (DMHG)
Przemyslaw Szafranski,,
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, Tomasz Gambin II - [Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA (DMHG)]
Tomasz Gambin,,
- The Institute of Computer Science
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
, Avinash V. Dharmadhikari - Department of Molecular and Human Genetics (DMHG) [Baylor College of Medicine (BCM)]
Avinash V. Dharmadhikari,,
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Total number of authors93
Journal seriesHuman Genetics, ISSN 0340-6717
Issue year2016
Vol135
No5
Pages569-586
Publication size in sheets0.85
DOIDOI:10.1007/s00439-016-1655-9
URL http://link.springer.com/article/10.1007%2Fs00439-016-1655-9
Languageen angielski
Score (nominal)35
ScoreMinisterial score = 35.0, 27-03-2017, ArticleFromJournal
Ministerial score (2013-2016) = 35.0, 27-03-2017, ArticleFromJournal
Publication indicators WoS Impact Factor: 2016 = 4.637 (2) - 2016=4.157 (5)
Citation count*16 (2018-05-25)
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