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  4. Long-Term 5-HT1A Receptor Agonist NLX-112 Treatment Improves Functional Recovery After Spinal Cord Injury

Long-Term 5-HT1A Receptor Agonist NLX-112 Treatment Improves Functional Recovery After Spinal Cord Injury

Int. J. Mol. Sci., 2025 · DOI: https://doi.org/10.3390/ijms26010239 · Published: December 30, 2024

Spinal Cord InjuryPharmacologyNeurology

Simple Explanation

Spinal cord injuries often disrupt the body's ability to control movement and organ function. This study explores whether a drug called NLX-112, which activates serotonin receptors, can improve recovery after such injuries. The researchers found that long-term treatment with NLX-112, starting two weeks after a spinal cord injury in rats, led to improved walking ability and better bladder function. These improvements suggest that NLX-112 could be a potential therapy for spinal cord injury patients, helping them regain some motor and autonomic functions.

Study Duration
6 weeks
Participants
52 adult female Sprague-Dawley rats
Evidence Level
Not specified

Key Findings

  • 1
    NLX-112 treatment significantly improves locomotion in a dose-dependent fashion, suggesting a direct relationship between the amount of drug and the improvement in walking ability.
  • 2
    The study demonstrated that NLX-112 improves LUT function, which includes both detrusor and EUS activities, indicating better bladder control and voiding efficiency.
  • 3
    NLX-112 reduces SCI-upregulated spinal 5-HT1A receptor expression below the injured site in both the L4 and L6/S1 spinal cord segments.

Research Summary

This study evaluated the efficacy of long-term NLX-112 intervention starting from two weeks post-T8 contusive SCI for an additional six weeks. Our results indicate that NLX-112 treatment significantly improves locomotion in a dose-dependent fashion, improves LUT function, reduces bladder weight and bladder wall thickness, and reduces the SCI-upregulated spinal 5-HT1A receptors compared to vehicle-treated SCI animals. These data suggest promising therapeutic potential for long-term NLX-112 activation of 5-HT1A receptors to treat SCI.

Practical Implications

Potential Therapeutic Strategy

NLX-112 could be a potential therapeutic strategy to treat neurogenic bladder after SCI.

Improvement in Motor Function

NLX-112 intervention is a potential repair strategy to improve locomotor recovery after SCI.

Clinical Relevance

The two-week delayed NLX-112 treatment after SCI provides a clinically relevant therapeutic window.

Study Limitations

  • 1
    Study was conducted on female rats only, and results may not be generalizable to males.
  • 2
    The study focuses on T8 contusive SCI, and the effects on other types or levels of SCI may differ.
  • 3
    Long-term effects and potential side effects of NLX-112 were not fully explored.

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