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Pulmonary vascular development in congenital diaphragmatic hernia
Daphne S Mous1, Heleen M Kool1, Rene Wijnen1
1Dept of Pediatric Surgery, Erasmus Medical Center-Sophia Children's Hospital, Rotterdam, The Netherlands.
Insights
Congenital diaphragmatic hernia (CDH) involves a diaphragm defect and lung issues, primarily causing persistent pulmonary hypertension (PH). Understanding molecular pathways in pulmonary vascular development is key to new therapeutic approaches for this severe condition.
Area of Science:
- Developmental Biology
- Pediatric Surgery
- Cardiovascular Research
Background:
- Congenital diaphragmatic hernia (CDH) is a complex congenital anomaly.
- It presents with a diaphragmatic defect, lung hypoplasia, and persistent pulmonary hypertension (PH).
- PH is the primary cause of mortality in affected newborns, with limited evidence-based treatments.
Purpose of the Study:
- To provide an overview of molecular pathways in pulmonary vascular development.
- To describe vascular abnormalities in CDH.
- To explore potential therapeutic strategies for CDH.
Main Methods:
- Review of current literature on pulmonary vascular development.
- Analysis of molecular pathways involved in vascular growth.
- Examination of CDH-associated vascular defects.
Main Results:
- Pulmonary vascular development is intrinsically linked to airway epithelial development.
- Abnormalities in vascular development originate early in gestation.
- Increased arteriolar and capillary muscularization characterizes PH in CDH.
Conclusions:
- Early disturbances in pulmonary vascular development lead to significant growth abnormalities in CDH.
- Further understanding of molecular pathways is crucial for developing effective therapies.
- Targeting molecular pathways offers potential for improved treatment of CDH and its associated PH.
Abstract:
Congenital diaphragmatic hernia (CDH) is a rare congenital anomaly characterised by a diaphragmatic defect, persistent pulmonary hypertension (PH) and lung hypoplasia. The relative contribution of these three elements can vary considerably in individual patients. Most affected children suffer primarily from the associated PH, for which the therapeutic modalities are limited and frequently not evidence based. The vascular defects associated with PH, which is characterised by increased muscularisation of arterioles and capillaries, start to develop early in gestation. Pulmonary vascular development is integrated with the development of the airway epithelium. Although our knowledge is still incomplete, the processes involved in the growth and expansion of the vasculature are beginning to be unravelled. It is clear that early disturbances of this process lead to major pulmonary growth abnormalities, resulting in serious clinical challenges and in many cases death in the newborn. Here we provide an overview of the current molecular pathways involved in pulmonary vascular development. Moreover, we describe the abnormalities associated with CDH and the potential therapeutic approaches for this severe abnormality.
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