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Updated: Dec 26, 2025

Neural Stem Cell Transplantation in Experimental Contusive Model of Spinal Cord Injury

Neural Stem Cell Transplantation in Experimental Contusive Model of Spinal Cord Injury

Published on: December 17, 2014

Improved mouse sciatic nerve regeneration following lymphocyte cell therapy.

André Luis Bombeiro¹, Bruno Henrique de Melo Lima¹, Amanda Pires Bonfanti¹

¹Department of Structural and Functional Biology, Institute of Biology, University of Campinas - UNICAMP, 13083-862, Campinas, SP, Brazil.

Molecular Immunology

|March 16, 2020

Summary

Adoptive transfer of lymphocytes enhances peripheral nerve regeneration by promoting beneficial inflammation. This immune cell therapy improves axonal regrowth and functional recovery after nerve injury.

Keywords:

Immunomodulation Lymphocyte Nerve regeneration PNS Wallerian degeneration

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Area of Science:

Neuroscience
Immunology
Regenerative Medicine

Background:

Peripheral nervous system (PNS) injury is a common cause of acquired nerve damage.
Immune system involvement is crucial for nerve regeneration, including tissue clearance and remodeling.
Previous studies showed improved motor recovery after lymphocyte transfer to sciatic nerve crush sites.

Purpose of the Study:

To evaluate sciatic nerve regeneration and T cell polarization after adoptive transfer of lymphocytes.
To investigate the effects of lymphocyte therapy on nerve tissue response and immune cell activity.
To determine the impact of enhanced early inflammation on peripheral nerve repair.

Main Methods:

Splenic lymphocytes were isolated from mice 14 days post-sciatic nerve crush.
Lymphocytes were adoptively transferred to axotomized mice 3 days post-injury.
In vivo imaging confirmed lymphocyte migration; flow cytometry analyzed T helper cell polarization (Th1, Th17).
Nerve regeneration was assessed via immunolabeling for axons, Schwann cells, GAP-43, BDNF, macrophages, and IgG.

Main Results:

Adoptive transfer of lymphocytes led to increased frequencies of proinflammatory Th1 and Th17 cells.
Enhanced lymphocyte presence correlated with improved axonal and Schwann cell labeling from 14 to 28 days post-lesion.
Macrophage and IgG levels were elevated in lymphocyte-treated mice.
Improved sensory recovery was observed in the lymphocyte-treated group.

Conclusions:

Enhanced early inflammation following peripheral nerve injury can be beneficial for regeneration.
Lymphocyte adoptive transfer promotes tissue clearance and axonal regrowth.
This immune-based therapeutic strategy shows promise for improving functional recovery after PNS injury.