Injured and demyelinated axon

Injured and demyelinated axons represent a pathological state of the nervous system where the protective myelin sheath is lost and the underlying neuronal process is damaged. This condition is a central feature of neurodegenerative and autoimmune disorders, most notably Multiple Sclerosis (MS) and spinal cord injury, where the loss of insulation leads to slowed or blocked nerve impulses and increased metabolic stress on the neuron (Compston & Coles, 2008). Over time, the lack of trophic support from myelin and the redistribution of ion channels (such as Nav1.6) lead to axonal degeneration and permanent functional deficit (Waxman, 2006). While the state itself is a complex tissue environment rather than a single molecule, it serves as the primary site for therapeutic interventions aimed at remyelination and neuroprotection. Current research focuses on targeting inhibitory molecules like LINGO-1 or promoting the maturation of oligodendrocyte precursor cells to restore the myelin sheath and preserve axonal health (Green et al., 2017; Cadavid et al., 2017).

Other names

Demyelinated nerve fiberAxonal injuryLesioned axonDemyelinated axon

Therapeutic strategies involve the promotion of remyelination through the differentiation of oligodendrocyte precursor cells (OPCs), the blockade of inhibitory signaling molecules like LINGO-1 or Nogo-A, and the modulation of ion channels to prevent calcium-mediated excitotoxicity and axonal degeneration (Waxman, 2006; Cadavid et al., 2017).