Lentivirus-mediated Knockdown of Ski Improves Neurological Function After Spinal Cord Injury in Rats

Area of Science:

• Neuroscience
• Regenerative Medicine
• Molecular Biology

Background:

• Glial scar formation after spinal cord injury (SCI) impedes axonal regeneration and functional recovery.
• Ski, a transcriptional co-regulator, is upregulated in spinal cord injury models and influences astrocyte behavior.
• Previous findings suggest Ski plays a role in astrocyte activation post-SCI.

Purpose of the Study:

• To investigate the in vivo effect of Ski knockdown on glial scar formation and neurological function after SCI.
• To determine if targeting Ski can modulate key molecules involved in glial scarring and axonal regeneration.
• To assess the therapeutic potential of Ski downregulation for SCI recovery.

Main Methods:

• A rat spinal cord injury model was established using Allen's percussion method.
• Lentivirus-mediated delivery was used to downregulate Ski expression in the injured spinal cord.
• Expression levels of glial scar markers (Gfap, vimentin), axonal regeneration markers (Nf-200, Gap43), and synapse formation marker (Synaptophysin) were analyzed.
• Motor function recovery was evaluated post-intervention.

Main Results:

• Knockdown of Ski significantly suppressed the expression of glial fibrillary acidic protein (Gfap) and vimentin.
• Ski downregulation increased the expression of neurofilament protein-200 (Nf-200), growth-associated protein (Gap43), and Synaptophysin.
• Motor function recovery was promoted in rats with Ski knockdown after SCI.

Conclusions:

• Ski inhibition reduces glial scar formation by suppressing key scar molecules.
• Downregulating Ski promotes axonal regeneration and synapse formation markers.
• Ski represents a potential therapeutic target for enhancing recovery after spinal cord injury.