Tissue Models for Neurogenesis and Repair in 3D

Area of Science:

• Biomedical Engineering
• Developmental Biology
• Neuroscience

Background:

• Vascular and neuronal tissue development are intricately linked during gestation.
• Understanding the signaling crosstalk is crucial for modeling neurogenesis.

Purpose of the Study:

• To develop a 3D tissue system that models neurogenesis and developmental signaling.
• To investigate the role of vascular networks and signaling molecules in neural development and repair.

Main Methods:

• Seeding human umbilical vein endothelial cells (HUVECs) in collagen gel channels to mimic vascular networks.
• Utilizing chicken dorsal root ganglia (DRGs) to observe axonal growth towards HUVEC-seeded or brain-derived neurotrophic factor (BDNF)-loaded channels.
• Applying the 3D system to model peripheral nerve injury and observe neural repair in vitro.

Main Results:

• Axons showed significantly longer growth and preferential extension towards HUVEC-seeded channels.
• Axonal growth was similarly enhanced towards channels loaded with BDNF, confirming its role in signaling.
• The 3D system demonstrated observable neural repair within two weeks following simulated laceration injuries.

Conclusions:

• The developed 3D tissue system effectively models neural network formation and repair processes.
• This platform can be used to further investigate the interactions between neural networks and other tissues.
• The findings highlight the importance of vascular-neuronal crosstalk in development and potential therapeutic strategies for nerve repair.