Journal
CELL REPORTS
Volume 25, Issue 3, Pages 544-+Publisher
CELL PRESS
DOI: 10.1016/j.celrep.2018.09.052
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Funding
- NIH/NINDS [R01NS062796, R01NS097428, R01NS095889]
- Adelson Medical Research Foundation [A130141]
- Rachleff family endowment
- NIH/NIGMS IRACDA post-doctoral fellowship [K12GM081266]
- NIH/NINDS career transition award [K22NS104234]
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Emerging evidence suggests that neuronal signaling is important for oligodendrocyte myelination; however, the necessity of this signaling during development is unclear. By eliminating dynamic neuronal signaling along the developing optic nerve, we find that oligodendrocyte differentiation is not dependent on neuronal signaling and that the initiation of myelination is dependent on a permissive substrate, namely supra-threshold axon caliber. Furthermore, we show that loss of dynamic neuronal signaling results in hypermyelination of axons. We propose that oligodendrocyte differentiation is regulated by non-neuronal factors during optic nerve development, whereas myelination is sensitive to the biophysical properties of axonal diameter.
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