A new approach for ratiometric in vivo calcium imaging of microglia.
A new approach for ratiometric in vivo calcium imaging of microglia.
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DOI:
10.1038/s41598-017-05952-3
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发表时间:
2017-07-20
影响因子:
4.6
通讯作者:
Garaschuk O
中科院分区:
文献类型:
--
作者:
Brawek B;Liang Y;Savitska D;Li K;Fomin-Thunemann N;Kovalchuk Y;Zirdum E;Jakobsson J;Garaschuk O
Microglia, resident immune cells of the brain, react to the presence of pathogens/danger signals with a large repertoire of functional responses including morphological changes, proliferation, chemotaxis, production/release of cytokines, and phagocytosis. In vitro studies suggest that many of these effector functions are Ca2+-dependent, but our knowledge about in vivo Ca2+ signalling in microglia is rudimentary. This is mostly due to technical reasons, as microglia largely resisted all attempts of in vivo labelling with Ca2+ indicators. Here, we introduce a novel approach, utilizing a microglia-specific microRNA-9-regulated viral vector, enabling the expression of a genetically-encoded ratiometric Ca2+ sensor Twitch-2B in microglia. The Twitch-2B-assisted in vivo imaging enables recording of spontaneous and evoked microglial Ca2+ signals and allows for the first time to monitor the steady state intracellular Ca2+ levels in microglia. Intact in vivo microglia show very homogenous and low steady state intracellular Ca2+ levels. However, the levels increase significantly after acute slice preparation and cell culturing along with an increase in the expression of activation markers CD68 and IL-1β. These data identify the steady state intracellular Ca2+ level as a versatile microglial activation marker, which is highly sensitive to the cell’s environment.
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影响因子:
16.6
作者:
Kovalchuk, Yury;Homma, Ryota;Garaschuk, Olga
通讯作者:
Garaschuk, Olga
DOI:
10.1056/nejmoa1211851
发表时间:
2013-01-10
期刊:
The New England journal of medicine
影响因子:
--
作者:
Guerreiro R;Wojtas A;Bras J;Carrasquillo M;Rogaeva E;Majounie E;Cruchaga C;Sassi C;Kauwe JS;Younkin S;Hazrati L;Collinge J;Pocock J;Lashley T;Williams J;Lambert JC;Amouyel P;Goate A;Rademakers R;Morgan K;Powell J;St George-Hyslop P;Singleton A;Hardy J;Alzheimer Genetic Analysis Group
通讯作者:
Alzheimer Genetic Analysis Group
影响因子:
4.4
作者:
Ghosh, S
通讯作者:
Ghosh, S
影响因子:
64.5
作者:
Gosselin D;Link VM;Romanoski CE;Fonseca GJ;Eichenfield DZ;Spann NJ;Stender JD;Chun HB;Garner H;Geissmann F;Glass CK
通讯作者:
Glass CK
DOI:
10.3791/50647
发表时间:
2013-08-09
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
作者:
Bronstein R;Torres L;Nissen JC;Tsirka SE
通讯作者:
Tsirka SE