Translational Considerations for Injectable Biomaterials and Bioscaffolds to Repair and Regenerate Brain Tissue

Area of Science:

• Biomaterials Science
• Neuroscience
• Regenerative Medicine

Background:

• Adult neurogenesis aids in replacing lost neurons and repairing damaged brain tissue.
• Neurogenesis alone is insufficient for substantial tissue replacement.
• Injectable extracellular matrix (ECM) bioscaffolds offer potential for brain tissue repair and regeneration.

Purpose of the Study:

• To explore the potential of injectable ECM bioscaffolds for brain tissue repair.
• To highlight the importance of pathological context, such as proteases, in bioscaffold biodegradation.
• To emphasize the need for translational considerations, including intracerebral delivery and large animal models, for clinical advancement.

Main Methods:

• Review of existing literature on adult neurogenesis and ECM bioscaffolds.
• Discussion of biodegradation mechanisms involving peripheral immune cells.
• Consideration of challenges in large animal models for brain regeneration.

Main Results:

• ECM bioscaffolds require biodegradation to facilitate brain cell invasion and de novo tissue formation.
• Translational challenges include intracerebral delivery and scaling regeneration to large brain defects.
• Large animal models, particularly non-human primates, are essential for pre-clinical evaluation.

Conclusions:

• Injectable bioscaffolds could revolutionize acute brain injury treatment.
• A robust, iterative translational strategy is necessary for clinical success.
• Addressing limitations in large animal models is key to advancing this technology.