Format

Send to

Choose Destination
Dev Cell. 2013 Jun 24;25(6):599-609. doi: 10.1016/j.devcel.2013.05.013.

Individual oligodendrocytes have only a few hours in which to generate new myelin sheaths in vivo.

Author information

1
Centre for Neuroregeneration, University of Edinburgh, Edinburgh EH16 4SB, UK.

Abstract

The number of myelin sheaths made by individual oligodendrocytes regulates the extent of myelination, which profoundly affects central nervous system function. It remains unknown when, during their life, individual oligodendrocytes can regulate myelin sheath number in vivo. We show, using live imaging in zebrafish, that oligodendrocytes make new myelin sheaths during a period of just 5 hr, with regulation of sheath number after this time limited to occasional retractions. We also show that activation and reduction of Fyn kinase in oligodendrocytes increases and decreases sheath number per cell, respectively. Interestingly, these oligodendrocytes also generate their new myelin sheaths within the same period, despite having vastly different extents of myelination. Our data demonstrate a restricted time window relative to the lifetime of the individual oligodendrocyte, during which myelin sheath formation occurs and the number of sheaths is determined.

Comment in

PMID:
23806617
PMCID:
PMC4013507
DOI:
10.1016/j.devcel.2013.05.013
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Elsevier Science Icon for PubMed Central
Loading ...
Support Center