Drug-Induced Demyelinating Neuropathies

Area of Science:

• Neuroscience
• Pharmacology
• Cell Biology

Background:

• Peripheral neuropathies are common adverse drug effects, often impacting axons or neuronal cell bodies.
• A subset of drugs induces neuropathies with a predominant schwannopathy and/or myelinopathy phenotype.

Purpose of the Study:

• To review drugs causing schwannopathy and/or myelinopathy-predominant peripheral neuropathies.
• To explore the underlying pathogenesis of drug-induced demyelination.

Main Methods:

• Literature review focusing on amiodarone, dichloroacetate, and TNF-α antagonists.
• Analysis of in vivo and in vitro studies investigating drug-induced demyelination.

Main Results:

• Amiodarone, dichloroacetate, and TNF-α antagonists are examples of drugs inducing schwannopathy/myelinopathy.
• Evidence suggests metabolic abnormalities and impaired autophagy in Schwann cells play a role.
• Immune system disorders are implicated in disrupting neuron-Schwann cell interactions.

Conclusions:

• Drug-induced demyelinating neuropathies involve complex mechanisms beyond axonal damage.
• Metabolic dysfunction, autophagy impairment, and immune dysregulation are key factors in Schwann cell and myelin pathology.
• Further research is needed to fully elucidate the pathogenesis of these specific drug-induced neuropathies.