Diseased central nervous system white matter and neuron-glia functional units

Diseased central nervous system (CNS) white matter and neuron-glia functional units refer to the integrated multicellular system of axons and their associated glial cells—oligodendrocytes, astrocytes, and microglia—that are disrupted during neurological disease. In a healthy state, these units facilitate rapid electrical signaling through myelination and provide essential metabolic support to neurons (Nave & Werner, 2014, Nat. Rev. Neurosci.). In diseased states such as Multiple Sclerosis or leukodystrophies, the unit is characterized by demyelination, reactive astrogliosis, and chronic neuroinflammation, which ultimately lead to axonal degeneration and permanent functional loss (Lassmann, 2018, Nat. Rev. Neurol.). This term represents a complex physiological and pathological environment rather than a single molecular target, making it a broad focus for therapeutic intervention rather than a specific drug-binding site. Current pharmacological approaches aim to protect these units or stimulate their repair by targeting specific proteins within the unit, such as sphingosine-1-phosphate (S1P) receptors on astrocytes and lymphocytes or inhibitory molecules like LINGO-1 on oligodendrocytes (Franklin & Ffrench-Constant, 2008, Nat. Rev. Neurosci.). Consequently, while the unit is the site of pathology, drug discovery typically identifies specific receptors, enzymes, or signaling pathways within these constituent cells as the actual therapeutic targets (Fields et al., 2015, Science).

Other names

Central nervous system white matterNeuron-glia unitMyelin-axon functional unitNeurovascular unit (related)Tripartite synapse (related)

Sphingosine-1-phosphate receptor modulation, B-cell depletion, Alpha-4 integrin inhibition, LINGO-1 antagonism, Cytokine modulation