High-frequency microdomain Ca2+ transients and waves during early myelin internode remodeling.

A. Battefeld, M. Popovic, Sharon I de Vries, M.H.P. Kole

Research output: Contribution to journal/periodicalArticleScientificpeer-review

209 Downloads (Pure)

Abstract

Ensheathment of axons by myelin is a highly complex and multi-cellular process. Cytosolic calcium (Ca2+) changes in the myelin sheath have been
implicated in myelin synthesis, but the source of this Ca2+ and the role of neuronal activity is not well understood. Using one-photon Ca2+ imaging,
we investigated myelin sheath formation in the mouse somatosensory cortex and found a high rate of spontaneous microdomain Ca2+ transients
and large-amplitude Ca2+ waves propagating along the internode. The frequency of Ca2+ transients and waves rapidly declines with maturation and reactivates during remyelination. Unexpectedly, myelin microdomain Ca2+ transients occur independent of neuronal action potential generation or network activity but are nearly completely abolished when the mitochondrial permeability transition pores are blocked. These findings are supported by the discovery
of mitochondria organelles in non-compacted myelin. Together, the results suggest that myelin microdomain Ca2+ signals are cell-autonomously
driven by high activity of mitochondria during myelin remodeling.
Original languageEnglish
Pages (from-to)182-191
JournalCell Reports
Volume26
DOIs
Publication statusPublished - 05 Jan 2019

Fingerprint Dive into the research topics of 'High-frequency microdomain Ca2+ transients and waves during early myelin internode remodeling.'. Together they form a unique fingerprint.

Cite this