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  4. Fibronectin EDA forms the chronic fibrotic scar after contusive spinal cord injury

Fibronectin EDA forms the chronic fibrotic scar after contusive spinal cord injury

Neurobiol Dis., 2018 · DOI: 10.1016/j.nbd.2018.04.014 · Published: August 1, 2018

Spinal Cord InjuryNeurologyResearch Methodology & Design

Simple Explanation

After a spinal cord injury (SCI), scar tissue forms which can prevent nerves from regenerating. This scar contains proteins like fibronectin. This study looks at a specific form of fibronectin, called FnEDA. The study found that mice without FnEDA had less long-term scar tissue and better recovery after SCI. This suggests FnEDA contributes to the long-term scar formation that inhibits recovery. The research suggests targeting FnEDA could be a new way to help people recover from spinal cord injuries by reducing the scar tissue that blocks nerve regeneration.

Study Duration
10 weeks
Participants
Male and female FnEDA-null and littermate wildtype mice
Evidence Level
Not specified

Key Findings

  • 1
    Eliminating FnEDA did not reduce the acute fibrotic response but markedly diminished chronic fibrotic scarring after SCI.
  • 2
    FnEDA-null mice showed significantly improved behavioral recovery from SCI compared to wildtype mice.
  • 3
    FnEDA-null mice exhibit smaller lesions with higher axonal density.

Research Summary

This study investigates the role of fibronectin EDA (FnEDA) in fibrotic scarring after spinal cord injury (SCI) using FnEDA-null mice. The research found that eliminating FnEDA reduces chronic fibrotic scarring, improves motor functional recovery, and increases the number of axons in the lesion site. The findings suggest that targeting FnEDA could be a potential therapeutic strategy for promoting recovery after SCI by disrupting fibronectin matrix stability.

Practical Implications

Therapeutic Target

FnEDA could be a potential therapeutic target for reducing chronic fibrotic scarring after SCI.

Improved Recovery

Inhibiting FnEDA may lead to improved functional recovery after SCI.

Axonal Regeneration/Sparing

Reducing FnEDA promotes a more conducive environment for axonal regeneration or sparing.

Study Limitations

  • 1
    The study used mice with a constitutive homozygous deletion of the FnEDA domain.
  • 2
    Tract tracing experiments are needed to investigate axonal regeneration or sparing.
  • 3
    Further research is needed to develop a mouse model of inducible FnEDA knockout under the control of a pericyte/fibroblast-specific Cre-promoter.

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