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Phenotype characterisation of TBX4 mutation and deletion carriers with neonatal and paediatric pulmonary hypertension
- Source :
- European Respiratory Journal. 54:1801965
- Publication Year :
- 2019
- Publisher :
- European Respiratory Society (ERS), 2019.
-
Abstract
- Rare variants in the T-box transcription factor 4 gene (TBX4) have recently been recognised as an emerging cause of paediatric pulmonary hypertension (PH). Their pathophysiology and contribution to persistent pulmonary hypertension in neonates (PPHN) are unknown. We sought to define the spectrum of clinical manifestations and histopathology associated with TBX4 variants in neonates and children with PH.We assessed clinical data and lung tissue in 19 children with PH, including PPHN, carrying TBX4 rare variants identified by next-generation sequencing and copy number variation arrays.Variants included six 17q23 deletions encompassing the entire TBX4 locus and neighbouring genes, and 12 likely damaging mutations. 10 infants presented with neonatal hypoxic respiratory failure and PPHN, and were subsequently discharged home. PH was diagnosed later in infancy or childhood. Three children died and two required lung transplantation. Associated anomalies included patent ductus arteriosus, septal defects, foot anomalies and developmental disability, the latter with a higher prevalence in deletion carriers. Histology in seven infants showed abnormal distal lung development and pulmonary hypertensive remodelling.TBX4 mutations and 17q23 deletions underlie a new form of developmental lung disease manifesting with severe, often biphasic PH at birth and/or later in infancy and childhood, often associated with skeletal anomalies, cardiac defects, neurodevelopmental disability and other anomalies.
- Subjects :
- 0301 basic medicine
Pulmonary and Respiratory Medicine
Pediatrics
medicine.medical_specialty
Lung
business.industry
medicine.medical_treatment
medicine.disease
Pulmonary hypertension
Pathophysiology
03 medical and health sciences
030104 developmental biology
0302 clinical medicine
medicine.anatomical_structure
030228 respiratory system
Respiratory failure
Ductus arteriosus
medicine
Lung transplantation
Histopathology
Copy-number variation
business
Subjects
Details
- ISSN :
- 13993003 and 09031936
- Volume :
- 54
- Database :
- OpenAIRE
- Journal :
- European Respiratory Journal
- Accession number :
- edsair.doi...........2ab60c4f8e06bc363d1b07fe53cc5eeb
- Full Text :
- https://doi.org/10.1183/13993003.01965-2018