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@ARTICLE{Djannatian:169388,
author = {Djannatian, Minou and Radha, Swathi and Weikert, Ulrich and
Safaiyani, Shima and Wrede, Christoph and Deichsel,
Cassandra and Kislinger, Georg and Rhomberg, Agata and
Ruhwedel, Torben and Campbell, Douglas S and van Ham, Tjakko
and Schmid, Bettina and Hegermann, Jan and Möbius, Wiebke
and Schifferer, Martina and Simons, Mikael},
title = {{M}yelination generates aberrant ultrastructure that is
resolved by microglia.},
journal = {The journal of cell biology},
volume = {222},
number = {3},
issn = {0021-9525},
address = {New York, NY},
publisher = {Rockefeller Univ. Press},
reportid = {DZNE-2023-00152},
pages = {e202204010},
year = {2023},
abstract = {To enable rapid propagation of action potentials, axons are
ensheathed by myelin, a multilayered insulating membrane
formed by oligodendrocytes. Most of the myelin is generated
early in development, resulting in the generation of
long-lasting stable membrane structures. Here, we explored
structural and dynamic changes in central nervous system
myelin during development. To achieve this, we performed an
ultrastructural analysis of mouse optic nerves by serial
block face scanning electron microscopy (SBF-SEM) and
confocal time-lapse imaging in the zebrafish spinal cord. We
found that myelin undergoes extensive ultrastructural
changes during early postnatal development. Myelin
degeneration profiles were engulfed and phagocytosed by
microglia using exposed phosphatidylserine as one 'eat me'
signal. In contrast, retractions of entire myelin sheaths
occurred independently of microglia and involved uptake of
myelin by the oligodendrocyte itself. Our findings show that
the generation of myelin early in development is an
inaccurate process associated with aberrant ultrastructural
features that require substantial refinement.},
keywords = {Animals / Mice / Axons: ultrastructure / Microglia:
ultrastructure / Myelin Sheath: ultrastructure /
Oligodendroglia: ultrastructure / Zebrafish / Optic Nerve:
ultrastructure / Microscopy, Electron, Scanning /
Phagocytosis / Time-Lapse Imaging},
cin = {AG Simons / AG Misgeld / AG Schmid},
ddc = {570},
cid = {I:(DE-2719)1110008 / I:(DE-2719)1110000-4 /
I:(DE-2719)1140002},
pnm = {351 - Brain Function (POF4-351) / 352 - Disease Mechanisms
(POF4-352)},
pid = {G:(DE-HGF)POF4-351 / G:(DE-HGF)POF4-352},
typ = {PUB:(DE-HGF)16},
pmc = {pmc:PMC9856851},
pubmed = {pmid:36637807},
doi = {10.1083/jcb.202204010},
url = {https://pub.dzne.de/record/169388},
}