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Related Concept Videos

Neurogenesis and Regeneration of Nervous Tissue01:15

Neurogenesis and Regeneration of Nervous Tissue

In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...

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Related Experiment Video

Updated: May 24, 2026

Fabrication of the Composite Regenerative Peripheral Nerve Interface (C-RPNI) in the Adult Rat
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Fabrication of the Composite Regenerative Peripheral Nerve Interface (C-RPNI) in the Adult Rat

Published on: February 25, 2020

Integrating Cells, Biomaterials, and Advanced Engineering for Next-Generation Peripheral Nerve Repair.

Gabriel Leonard Galahad Declercq, Shang Song

    Cells, Tissues, Organs
    |May 22, 2026
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    Summary
    This summary is machine-generated.

    Engineered nerve conduits show promise for peripheral nerve repair, achieving significant motor recovery in animal models. Further development is needed to overcome barriers for clinical translation in complex nerve injuries.

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    Anatomically Inspired Three-dimensional Micro-tissue Engineered Neural Networks for Nervous System Reconstruction, Modulation, and Modeling
    10:45

    Anatomically Inspired Three-dimensional Micro-tissue Engineered Neural Networks for Nervous System Reconstruction, Modulation, and Modeling

    Published on: May 31, 2017

    Area of Science:

    • Biomaterials Science
    • Cell Biology
    • Biofabrication

    Background:

    • Peripheral nerve injuries (PNIs) cause significant functional deficits, with autografts having limitations for long or proximal lesions.
    • Engineered nerve conduits offer a promising alternative to autografts, leveraging advances in cell biology, biomaterials, and biofabrication.
    • This review integrates these domains to establish a translational framework for engineered nerve replacements.

    Purpose of the Study:

    • To review the past decade of progress in engineered nerve conduits for PNI repair.
    • To evaluate cell-based therapies, biomaterial scaffolds, and integrated strategies.
    • To benchmark functional outcomes using standardized metrics and propose design-readiness targets.

    Main Methods:

    • Structured narrative review of 160 articles (2015-2025) from major scientific databases.
    • Analysis of cell types (SCs, MSCs, iPSCs, NSCs/NPCs, OECs), scaffold materials (natural, synthetic, hybrid), and integrated constructs (seeded conduits, hydrogels, conductive designs, 3D bioprinted).
    • Evaluation of functional recovery in rodent (≤15 mm) and large-animal (≥30 mm) models using motor (SFI, CMAP, NCV) and sensory metrics.

    Main Results:

    • Cell-seeded conduits achieve ≥85% motor recovery in rodent models and show promise in large animals for nerve gaps up to 30 mm.
    • Various cell types and scaffold designs demonstrate potential for neurotrophic support, immunomodulation, and remyelination.
    • Standardized sensory testing shows parallel recovery trends, though less frequently reported.

    Conclusions:

    • Engineered conduits are nearing equivalence with autografts for specific PNI models.
    • Key challenges include vascularization, degradation by-products, cell variability, and scalable manufacturing.
    • Clinical translation is promising for digital nerve repairs, with future potential for more complex injuries using advanced, integrated strategies.