Reciprocal regulation between resting microglial dynamics and neuronal activity in vivo.

Abstract:

:Microglia are the primary immune cells in the brain. Under physiological conditions, they typically stay in a "resting" state, with ramified processes continuously extending to and retracting from surrounding neural tissues. Whether and how such highly dynamic resting microglia functionally interact with surrounding neurons are still unclear. Using in vivo time-lapse imaging of both microglial morphology and neuronal activity in the optic tectum of larval zebrafish, we found that neuronal activity steers resting microglial processes and facilitates their contact with highly active neurons. This process requires the activation of pannexin-1 hemichannels on neurons. Reciprocally, such resting microglia-neuron contact reduces both spontaneous and visually evoked activities of contacted neurons. Our findings reveal an instructive role for neuronal activity in resting microglial motility and suggest the function for microglia in homeostatic regulation of neuronal activity in the healthy brain.

journal_name

Dev Cell

journal_title

Developmental cell

authors

Li Y,Du XF,Liu CS,Wen ZL,Du JL

doi

10.1016/j.devcel.2012.10.027

subject

Has Abstract

pub_date

2012-12-11 00:00:00

pages

1189-202

issue

6

eissn

1534-5807

issn

1878-1551

pii

S1534-5807(12)00490-X

journal_volume

23

pub_type

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