axonal transport
Bidirectional movement of cellular components along nerve fibers, disrupted in neuroinflammatory conditions.
Full Definition
Axonal transport refers to the highly regulated bidirectional movement of organelles, proteins, lipids, and other cellular components along the length of nerve fibers. This process is essential for neuronal function, involving both anterograde transport (from cell body to synapse) and retrograde transport (from synapse to cell body) mediated by motor proteins such as kinesin and dynein. In neuroimmunology, axonal transport dysfunction is increasingly recognized as a key pathological mechanism in inflammatory CNS diseases. Inflammatory mediators, including cytokines and nitric oxide, can impair axonal transport leading to energy failure, accumulation of organelles, and eventual axonal degeneration. This process contributes to irreversible neurological disability in conditions such as multiple sclerosis, where transport disruption may occur independently of demyelination. Understanding axonal transport mechanisms has implications for neuroprotective therapeutic strategies.
Usage
Usage note: Specify direction (anterograde/retrograde) when discussing specific transport mechanisms.
In Context
- "Inflammatory mediators in the CSF may impair axonal transport, contributing to neurodegeneration." — Research paper discussion
- "Neurofilament accumulation suggests disrupted axonal transport in the patient's lesions." — Pathology report