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Global gene expression profiling in congenital diaphragmatic hernia (CDH) patients
Kubilay Gürünlüoğlu1, Muhammed Dündar2, Turgay Unver3
1Department of Pediatric Surgery, Faculty of Medicine, Inonu University, Malatya, Turkey.
Insights
Congenital diaphragmatic hernia (CDH) is a complex birth defect. Gene expression analysis revealed 11 key genes linked to lung development, vascularization, and vitamin A metabolism, offering insights into CDH causes.
Area of Science:
- Genetics
- Developmental Biology
- Pediatric Surgery
Background:
- Congenital diaphragmatic hernia (CDH) involves a diaphragm defect allowing organ displacement into the chest.
- CDH is a serious congenital anomaly requiring surgical intervention.
- Understanding the genetic underpinnings of CDH is crucial for improving patient outcomes.
Purpose of the Study:
- To analyze global gene expression profiles in newborns with congenital diaphragmatic hernia.
- To identify specific genes and pathways associated with CDH etiology.
- To explore the complexity of CDH as a multigenic condition.
Main Methods:
- Whole genome gene expression profiling was performed on nine CDH patients and one healthy control.
- Differentially regulated genes were identified and analyzed.
- Gene ontology analysis was used to associate gene expression changes with biological processes.
Main Results:
- A total of 560 differentially regulated genes were identified in CDH patients.
- Eleven genes showed significant expression changes related to lung tissue, vascular development, and vitamin A metabolism.
- Specific genes implicated include SLC25A24, RAB3IL1 (angiogenesis), HIF1A, FOXC2-AS1 (alveolus), MAGI2-AS3 (diaphragm), LHX4, DHH (lung), and BRINP1, FZD9, WNT4, BLOC1S1-RDH5 (retinol/vitamin A).
Conclusions:
- Congenital diaphragmatic hernia is a complex, multigenic anomaly.
- Specific genes involved in angiogenesis, lung development, and vitamin A metabolism are implicated in CDH.
- Holistic approaches are necessary for a comprehensive understanding and treatment of CDH.
Abstract:
Congenital diaphragmatic hernia (CDH) is an anomaly characterized by a defect in the diaphragm, leading to the passage of intra-abdominal organs into the thoracic cavity. Herein, the presented work analyzes the global gene expression profiles in nine CDH and one healthy newborn. All of the patients had left posterolateral (Bochdalek) diaphragmatic hernia, operated via an abdominal approach, and stomach and bowels in the thorax cavity. Some patients also had additional anomalies. A total of 560 differentially regulated genes were measured. Among them, 11 genes showed significant changes in expression associated with lung tissue, vascular structure development, and vitamin A metabolism, which are typical ontologies related to CDH etiology. Among them, SLC25A24 and RAB3IL1 are involved in angiogenesis, HIF1A and FOXC2-AS1 are related with the alveolus, MAGI2-AS3 is associated with the diaphragm, LHX4 and DHH are linked with the lung, and BRINP1, FZD9, WNT4, and BLOC1S1-RDH5 are involved in retinol. Besides, the expression levels of some previously claimed genes with CDH etiology also showed diverse expression patterns in different patients. All these indicated that CDH is a complex, multigenic anomaly, requiring holistic approaches for its elucidation.
