Microcomputed tomography visualization and quantitation of the pulmonary arterial microvascular tree in mouse models...

Area of Science:

• Pulmonary vascular biology
• Medical imaging
• Fibrotic lung disease research

Background:

• Pulmonary vascular dysfunction, marked by microvessel loss, is key in chronic lung diseases (CLD).
• Small pulmonary arterioles and capillaries are initially affected by pruning and remodeling in CLD models.
• 3D visualization is crucial for understanding vascular changes in CLD, aging, and tissue repair.

Purpose of the Study:

• To develop a novel method for 3D visualization and quantification of the murine pulmonary arterial circulation.
• To assess the impact of bleomycin-induced injury on pulmonary arterial vascular structure.

Main Methods:

• Development of a novel perfusion-based microcomputed tomography (µCT) imaging technique.
• Quantification of microvessels down to approximately 6 µM in diameter.
• 3D reconstruction and analysis of pulmonary arterial vasculature.

Main Results:

• Successful development of a perfusion methodology for 3D visualization and quantification of mouse pulmonary microvasculature.
• Demonstration of significant alterations in arterial vessel structure following bleomycin-induced injury and peak fibrosis.
• Validation of the technique's ability to visualize and quantitate microvascular changes.

Conclusions:

• A novel 3D perfusion µCT method enables detailed visualization and quantification of pulmonary arterial microvasculature.
• This technique effectively captures structural changes in pulmonary vasculature following fibrotic injury.
• The developed tool will advance the study of angiogenesis in CLD development and tissue repair.