Article (Scientific journals)
In vivo characterization of functional states of cortical microglia during peripheral inflammation.
Riester, Karin; Brawek, Bianca; Savitska, Daria et al.
2020In Brain, Behavior and Immunity, 87, p. 243 - 255
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Keywords :
Ca(2+) signaling; In vivo; Microglia; Peripheral inflammation; Lipopolysaccharides; Brain; Humans; Signal Transduction; Inflammation; Ca2+ signaling; Immunology; Endocrine and Autonomic Systems; Behavioral Neuroscience
Abstract :
[en] Peripheral inflammation is known to trigger a mirror inflammatory response in the brain, involving brain's innate immune cells - microglia. However, the functional phenotypes, which these cells adopt in the course of peripheral inflammation, remain obscure. In vivo two-photon imaging of microglial Ca2+ signaling as well as process motility reveals two distinct functional states of cortical microglia during a lipopolysaccharide-induced peripheral inflammation: an early "sensor state" characterized by dramatically increased intracellular Ca2+ signaling but ramified morphology and a later "effector state" characterized by slow normalization of intracellular Ca2+ signaling but hypertrophic morphology, substantial IL-1β production in a subset of cells as well as increased velocity of directed process extension and loss of coordination between individual processes. Thus, lipopolysaccharide-induced microglial Ca2+ signaling might represent the central element connecting receptive and executive functions of microglia.
Disciplines :
Neurology
Author, co-author :
Riester, Karin;  Institute of Physiology, Department of Neurophysiology, Eberhard Karls University Tübingen, Tübingen, Germany
Brawek, Bianca;  Institute of Physiology, Department of Neurophysiology, Eberhard Karls University Tübingen, Tübingen, Germany
Savitska, Daria;  Institute of Physiology, Department of Neurophysiology, Eberhard Karls University Tübingen, Tübingen, Germany
Fröhlich, Nicole;  Institute of Physiology, Department of Neurophysiology, Eberhard Karls University Tübingen, Tübingen, Germany
Zirdum, Elizabeta;  Institute of Physiology, Department of Neurophysiology, Eberhard Karls University Tübingen, Tübingen, Germany
Mojtahedi, Nima;  Institute of Physiology, Department of Neurophysiology, Eberhard Karls University Tübingen, Tübingen, Germany
HENEKA, Michael  ;  Department of Neurodegenerative Disease and Geriatric Psychiatry, University of Bonn, Bonn, Germany, German Center for Neurodegenerative Diseases, Bonn, Germany
Garaschuk, Olga;  Institute of Physiology, Department of Neurophysiology, Eberhard Karls University Tübingen, Tübingen, Germany. Electronic address: olga.garaschuk@uni-tuebingen.de
External co-authors :
yes
Language :
English
Title :
In vivo characterization of functional states of cortical microglia during peripheral inflammation.
Publication date :
July 2020
Journal title :
Brain, Behavior and Immunity
ISSN :
0889-1591
eISSN :
1090-2139
Publisher :
Academic Press Inc., Netherlands
Volume :
87
Pages :
243 - 255
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Volkswagen Foundation
Funding text :
We thank A. Weible, G. Heck, and K. Schöntag for technical assistance. This work was partially supported by VolkswagenStiftung Grant 90233 to O.G. Appendix A
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