Rethinking Neuroregenerative Microenvironments: Synergy Between Bioengineering and Organoids

Area of Science:

• Regenerative Medicine
• Neuroscience
• Biomaterials Science

Background:

• Central nervous system (CNS) injuries and neurodegenerative diseases lack effective cures due to detrimental microenvironments.
• The peripheral nervous system (PNS) shows greater regeneration, offering insights for CNS repair strategies.
• Existing challenges include neuroinflammation, oxidative stress, and glial scarring that inhibit axonal regrowth.

Purpose of the Study:

• To review the CNS injury microenvironment and key design principles for engineered repair matrices.
• To highlight lessons learned from advanced peripheral nerve guidance conduits for CNS applications.
• To explore novel strategies for neural circuit reconstruction.

Main Methods:

• Overview of CNS injury microenvironment and regenerative barriers.
• Summary of design requirements for engineered repair matrices.
• Highlighting advances in hydrogels, bioinks, 3D bioprinting, and organoid engineering.

Main Results:

• Injectable hydrogels can modulate CNS microenvironments, support cell growth, and restore vascular function.
• 3D bioprinting enables fabrication of complex neurovascular architectures.
• Organoid-based strategies offer modular biohybrid constructs for neural repair.

Conclusions:

• Integrating biomaterials, biofabrication, and organoid engineering provides a roadmap for neural circuit reconstruction.
• Advances in PNS repair inform translation to CNS applications.
• These strategies hold promise for treating currently incurable neurological conditions.