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Spinal Cord

Spinal Cord

The spinal cord, a critical component of the central nervous system, extends from the base of the brainstem to the lumbar region of the vertebral column. It is essential for maintaining physical stability and facilitating communication between the brain and peripheral parts of the body.

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Spinal Cord Lateral Hemisection and Asymmetric Behavioral Assessments in Adult Rats

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AAV-KLF7 Promotes Descending Propriospinal Neuron Axonal Plasticity after Spinal Cord Injury.

Wen-Yuan Li^1,2, Ying Wang², Feng-Guo Zhai³

¹Department of Anatomy, Basic Medical College, China Medical University, Shenyang 110122, China.

Neural Plasticity

|September 9, 2017

Summary

This study shows that KLF7 promotes the regeneration of descending propriospinal neuron (DPSN) axons after spinal cord injury (SCI). KLF7 enhances synapse formation and functional recovery, suggesting its therapeutic potential for SCI.

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Area of Science:

Neuroscience
Regenerative Medicine
Molecular Biology

Background:

Descending propriospinal neuron (DPSN) axons are vital for spinal cord function and recovery after injury.
The transcription factor KLF7 has been implicated in axonal plasticity following spinal cord injury (SCI).

Purpose of the Study:

To investigate the potential of KLF7 to promote DPSN axon regeneration and synapse formation post-SCI.
To evaluate the therapeutic efficacy of Adeno-Associated Virus-mediated KLF7 (AAV-KLF7) delivery for spinal cord injury.
To assess the impact of KLF7 on functional recovery and related biological markers after SCI.

Main Methods:

Overexpression of KLF7 using an AAV-KLF7 construct in vitro and in vivo.
Induction of SCI via T10 contusion in C57BL/6 mice, followed by AAV-KLF7 injection.
Assessment of KLF7 expression, target gene levels (NGF, TrkA, GAP43, P0), myelin sparing, axonal regeneration, synapse formation, and functional parameters.

Main Results:

KLF7 overexpression enhanced axonal outgrowth in vitro.
In vivo, AAV-KLF7 treatment increased KLF7 and its target genes in the injured spinal cord.
KLF7 treatment improved myelin sparing, DPSN axon regeneration, synapse formation, muscle weight, motor endplate morphology, and functional recovery.

Conclusions:

KLF7 significantly promotes DPSN axonal plasticity and synapse formation with motor neurons.
AAV-KLF7 demonstrates therapeutic potential for enhancing functional recovery after spinal cord injury.
KLF7 represents a promising therapeutic agent for spinal cord injury treatment.