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@ARTICLE{Motori:137156,
author = {Motori, Elisa and Puyal, Julien and Toni, Nicolas and
Ghanem, Alexander and Angeloni, Cristina and Malaguti, Marco
and Cantelli-Forti, Giorgio and Berninger, Benedikt and
Conzelmann, Karl-Klaus and Götz, Magdalena and Winklhofer,
Konstanze F and Hrelia, Silvana and Bergami, Matteo},
title = {{I}nflammation-induced alteration of astrocyte
mitochondrial dynamics requires autophagy for mitochondrial
network maintenance.},
journal = {Cell metabolism},
volume = {18},
number = {6},
issn = {1550-4131},
address = {Cambridge, Mass.},
publisher = {Cell Press},
reportid = {DZNE-2020-03478},
pages = {844-859},
year = {2013},
abstract = {Accumulating evidence suggests that changes in the
metabolic signature of astrocytes underlie their response to
neuroinflammation, but how proinflammatory stimuli induce
these changes is poorly understood. By monitoring astrocytes
following acute cortical injury, we identified a
differential and region-specific remodeling of their
mitochondrial network: while astrocytes within the penumbra
of the lesion undergo mitochondrial elongation, those
located in the core-the area invaded by proinflammatory
cells-experience transient mitochondrial fragmentation. In
brain slices, proinflammatory stimuli reproduced localized
changes in mitochondrial dynamics, favoring fission over
fusion. This effect was triggered by Drp1 phosphorylation
and ultimately resulted in reduced respiratory capacity.
Furthermore, maintenance of the mitochondrial architecture
critically depended on the induction of autophagy. Deletion
of Atg7, required for autophagosome formation, prevented the
reestablishment of tubular mitochondria, leading to marked
reactive oxygen species accumulation and cell death. Thus,
our data reveal autophagy to be essential for regenerating
astrocyte mitochondrial networks during inflammation.},
keywords = {Animals / Astrocytes: cytology / Astrocytes: drug effects /
Astrocytes: metabolism / Autophagy / Autophagy-Related
Protein 7 / Cells, Cultured / Cytokines: metabolism /
Dynamins: metabolism / Inflammation: metabolism /
Inflammation: pathology / Interferon-gamma: pharmacology /
Interleukin-1beta: metabolism / Lipopolysaccharides:
toxicity / Male / Mice / Mice, Inbred C57BL / Mice,
Transgenic / Microtubule-Associated Proteins: genetics /
Microtubule-Associated Proteins: metabolism / Mitochondria:
drug effects / Mitochondria: metabolism / Mitochondrial
Dynamics: drug effects / Nitric Oxide Synthase Type II:
metabolism / Phosphorylation / Reactive Oxygen Species:
metabolism / Atg7 protein, mouse (NLM Chemicals) / Cytokines
(NLM Chemicals) / Interleukin-1beta (NLM Chemicals) /
Lipopolysaccharides (NLM Chemicals) / Microtubule-Associated
Proteins (NLM Chemicals) / Reactive Oxygen Species (NLM
Chemicals) / Interferon-gamma (NLM Chemicals) / Nitric Oxide
Synthase Type II (NLM Chemicals) / Dnm1l protein, mouse (NLM
Chemicals) / Dynamins (NLM Chemicals) / Autophagy-Related
Protein 7 (NLM Chemicals)},
cin = {München Pre 2020},
ddc = {570},
cid = {I:(DE-2719)6000016},
pnm = {341 - Molecular Signaling (POF3-341)},
pid = {G:(DE-HGF)POF3-341},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:24315370},
doi = {10.1016/j.cmet.2013.11.005},
url = {https://pub.dzne.de/record/137156},
}