Microcomputed Tomography-Based Analysis of Neovascularization within Bioengineered Vascularized Tissues.

Area of Science:

• Tissue Engineering
• Vascular Biology
• Biomedical Imaging

Background:

• Evaluating neovascularization is crucial for tissue engineering success.
• Existing methods lack reproducible 3D visualization of new blood vessels.
• A robust methodology for assessing neovessel development is needed.

Purpose of the Study:

• To develop and validate a 3D visualization and analysis method for neovessels in engineered tissues.
• To assess the vascularization of bioengineered constructs in vivo.
• To provide a comprehensive understanding of vessel organization during tissue development.

Main Methods:

• Utilized a contrast agent perfusion protocol combined with high-resolution microcomputed tomography (microCT).
• Implanted bioengineered scaffolds with adipose-derived microvascular endothelial cells (HAMECs) and dental pulp stem cells (DPSCs) in a rat model.
• Performed volumetric and spatial analysis of neovasculature in explants after 14 days of in vivo maturation.

Main Results:

• Successfully visualized and analyzed 3D neovascular networks within engineered tissues.
• Demonstrated the method's applicability with different cell coculture systems, including MSCs and HAMECs.
• Quantified vessel organization and development during tissue engraftment.

Conclusions:

• The developed perfusion and microCT approach offers in-depth, reproducible 3D visualization of neovessels.
• This methodology enhances the understanding of vascularization processes in tissue engineering.
• The technique is valuable for evaluating the efficacy of prevascularization strategies.