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Autosomal dominant variants in FOXJ1 causing primary ciliary dyskinesia in two patients with obstructive hydrocephalus

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Title: Autosomal dominant variants in FOXJ1 causing primary ciliary dyskinesia in two patients with obstructive hydrocephalus
Authors: Adam J. Shapiro, Kimberley Kaspy, M. Leigh Ann Daniels, Jaclyn R. Stonebraker, Van‐Hung Nguyen, Lyne Joyal, Michael R. Knowles, Maimoona A. Zariwala
Source: Molecular Genetics & Genomic Medicine, Vol 9, Iss 7, Pp n/a-n/a (2021)
Publisher Information: Wiley, 2021.
Publication Year: 2021
Collection: LCC:Genetics
Subject Terms: Genetics, QH426-470
More Details: Abstract Background Primary ciliary dyskinesia (PCD) is a mostly autosomal recessive, genetic disease of abnormal motile cilia function, resulting in bronchiectasis, infertility, organ laterality defects, and chronic otolaryngology disease. Though motile, ependymal cilia influencing cerebrospinal fluid flow in the central nervous system share many aspects of structure and function with motile cilia in the respiratory tract, hydrocephalus is rarely associated with PCD. Recently, pathogenic variants in FOXJ1 (Chr 17q25.1) were identified causing PCD associated with hydrocephalus, reduced respiratory cilia number, axonemal microtubule disorganization, and occurring in a de novo, autosomal dominant inheritance pattern. Method Two patients with chronic oto‐sino‐pulmonary disease and hydrocephalus underwent candidate testing of FOXJ1. Coding region and splice junctions were sequenced and analyzed under the auspices of Genetic Disorders of Mucociliary Clearance Consortium. Results Upon sequencing of the entire coding region and splice‐junctions, heterozygous, pathogenic variants in FOXJ1 were discovered in exon 3 of two patients: an 11‐month‐old female with situs inversus totalis (NM_001454.4: c.945delC (p.Phe315Leufs*18)) and a 51 year‐old male, post‐double lung transplantation (NM_001454.4: c.929_932delACTG (p.Asp310Glyfs*22)). FOXJ1 variants were not detected in the available parents and the siblings of these probands. Conclusion FOXJ1 pathogenic variants cause PCD in a de novo, autosomal dominant inheritance pattern, and are associated with hydrocephalus. Physicians treating patients with hydrocephalus and chronic oto‐sino‐pulmonary disease should be aware of this PCD association and test for FOXJ1 variants.
Document Type: article
File Description: electronic resource
Language: English
ISSN: 2324-9269
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DOI: 10.1002/mgg3.1726
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  Data: Autosomal dominant variants in FOXJ1 causing primary ciliary dyskinesia in two patients with obstructive hydrocephalus
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  Data: Molecular Genetics & Genomic Medicine, Vol 9, Iss 7, Pp n/a-n/a (2021)
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  Data: Abstract Background Primary ciliary dyskinesia (PCD) is a mostly autosomal recessive, genetic disease of abnormal motile cilia function, resulting in bronchiectasis, infertility, organ laterality defects, and chronic otolaryngology disease. Though motile, ependymal cilia influencing cerebrospinal fluid flow in the central nervous system share many aspects of structure and function with motile cilia in the respiratory tract, hydrocephalus is rarely associated with PCD. Recently, pathogenic variants in FOXJ1 (Chr 17q25.1) were identified causing PCD associated with hydrocephalus, reduced respiratory cilia number, axonemal microtubule disorganization, and occurring in a de novo, autosomal dominant inheritance pattern. Method Two patients with chronic oto‐sino‐pulmonary disease and hydrocephalus underwent candidate testing of FOXJ1. Coding region and splice junctions were sequenced and analyzed under the auspices of Genetic Disorders of Mucociliary Clearance Consortium. Results Upon sequencing of the entire coding region and splice‐junctions, heterozygous, pathogenic variants in FOXJ1 were discovered in exon 3 of two patients: an 11‐month‐old female with situs inversus totalis (NM_001454.4: c.945delC (p.Phe315Leufs*18)) and a 51 year‐old male, post‐double lung transplantation (NM_001454.4: c.929_932delACTG (p.Asp310Glyfs*22)). FOXJ1 variants were not detected in the available parents and the siblings of these probands. Conclusion FOXJ1 pathogenic variants cause PCD in a de novo, autosomal dominant inheritance pattern, and are associated with hydrocephalus. Physicians treating patients with hydrocephalus and chronic oto‐sino‐pulmonary disease should be aware of this PCD association and test for FOXJ1 variants.
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