Postnatal pulmonary artery development from transcript to tissue

Area of Science:

• Cardiovascular Biology
• Developmental Biology
• Biomedical Engineering

Background:

• Congenital conditions and surgeries significantly impact pulmonary artery hemodynamics during development.
• Pathological conditions include patent ductus arteriosus, pulmonary atresia/stenosis, and hypoxemia-induced pulmonary hypertension.
• Surgical interventions like Blalock-Thomas-Taussig shunt, Glenn, and Fontan procedures alter pulmonary artery function.

Purpose of the Study:

• To investigate the natural postnatal development of pulmonary arteries from biological and mechanical viewpoints.
• To establish a data-informed computational model for simulating pulmonary artery development under hemodynamic perturbations.
• To improve understanding of pulmonary artery phenotypes for better diagnosis, treatment, and prognosis.

Main Methods:

• Collected novel data from wild-type mice on postnatal changes.
• Analyzed gene expression, wall composition, and biomechanical properties of proximal pulmonary arteries.
• Developed a computational model informed by experimental data.

Main Results:

• Documented normal postnatal changes in gene expression, wall composition, and biomechanical properties of proximal pulmonary arteries in mice.
• Established a novel computational model of pulmonary artery development.
• The model can simulate outcomes in response to hemodynamic perturbations.

Conclusions:

• Understanding normal pulmonary artery development is fundamental to addressing congenital conditions and surgical interventions.
• The developed computational model provides a valuable tool for predicting the effects of hemodynamic changes on pulmonary artery development.
• This research lays the groundwork for improved diagnostic and therapeutic strategies for pulmonary artery diseases.