Epigenetic processes associated with neonatal spinal transection

Area of Science:

• Neuroscience
• Developmental Biology
• Epigenetics

Background:

• Spinal cord injury (SCI) impacts spinal cord plasticity, partly mediated by brain-derived neurotrophic factor (BDNF).
• BDNF delivery shows promise in mitigating SCI consequences.
• Previous research identified epigenetic changes in the BDNF gene following SCI.

Purpose of the Study:

• To investigate locus-specific epigenetic modifications and expression patterns of the BDNF gene during early development after SCI.
• To determine if BDNF gene epigenetic activity can serve as a biomarker for SCI etiology and therapeutic intervention.

Main Methods:

• Neonatal rats (P1) received thoracic spinal cord lesions.
• Cervical and lumbar spinal cord tissues were collected at P7, P14, and P21.
• BDNF expression, locus-specific methylation (exon IX and IV), and global methylation levels were quantified.

Main Results:

• SCI induced locus-specific reductions in BDNF expression, correlated with increased methylation caudal to the injury.
• Elevated BDNF expression was observed at the P14 timepoint.
• Global methylation levels were also assessed across timepoints.

Conclusions:

• Epigenetic regulation of the BDNF gene is altered following developmental SCI.
• BDNF gene methylation patterns may act as a biomarker for understanding SCI progression.
• These epigenetic markers could inform the efficacy of interventions for spinal cord injury.