Older nerve-support cell precursors respond to inflammation in animals
An experiment in young and middle-aged animals found that precursors of nerve-insulating cells responded to immune attacks, but few matured.
Limit: The study examined an acute stage; lasting repair was not measured
Edited by Boris Djordjevic · AgingResearch.News
In an experiment in young and middle-aged animals, researchers genetically labeled oligodendrocyte progenitor cells—precursors of cells that make myelin, the insulation around nerve fibers. They transferred immune cells that react against myelin to study the precursors’ response to an autoimmune attack, in which the immune system targets the body’s own tissue.
In both age groups, labeled precursors were more abundant in damaged areas than in nerve-fiber tissue outside them. Dividing precursors clustered at the edges of damaged areas. Few labeled precursors matured into myelin-making cells, and maturation was rarest inside damaged areas. Myelin repair was present in both age groups at this acute stage. The immune-cell transfer reduced differentiated myelin-making cells, particularly in middle-aged animals. Mature myelin-making cells were dying within damaged areas and at the borders of the membranes surrounding the brain and spinal cord.
Why it matters
Aging is associated with progressive disability in people with multiple sclerosis. The authors suggest that identifying pathways that help precursor cells and newly formed myelin-making cells survive inflammation could guide therapies to rebuild nerve insulation.
Caveats
The results describe an acute stage of inflammation in animals, not lasting repair or outcomes in people with multiple sclerosis.
The paper
Aged oligodendrocyte progenitors retain the capacity to respond to an inflammatory insult
The Ohio State University
Experimental Neurology, Jun 10, 2026, Open access
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