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Neuronal Mitochondrial Dysfunction Activates the Integrated Stress Response to Induce Fibroblast Growth Factor 21.

Published version
Peer-reviewed

Type

Article

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Authors

Restelli, Lisa Michelle 
Oettinghaus, Björn 
Halliday, Mark 
Agca, Cavit 
Licci, Maria 

Abstract

Stress adaptation is essential for neuronal health. While the fundamental role of mitochondria in neuronal development has been demonstrated, it is still not clear how adult neurons respond to alterations in mitochondrial function and how neurons sense, signal, and respond to dysfunction of mitochondria and their interacting organelles. Here, we show that neuron-specific, inducible in vivo ablation of the mitochondrial fission protein Drp1 causes ER stress, resulting in activation of the integrated stress response to culminate in neuronal expression of the cytokine Fgf21. Neuron-derived Fgf21 induction occurs also in murine models of tauopathy and prion disease, highlighting the potential of this cytokine as an early biomarker for latent neurodegenerative conditions.

Description

Keywords

Alzheimer’s disease, autophagy, biomarker, endoplasmic reticulum, heme, metabolism, mitochondria, neurodegeneration, tau, unfolded protein response, Animals, Fibroblast Growth Factors, Mice, Mitochondria, Neurons

Journal Title

Cell Rep

Conference Name

Journal ISSN

2211-1247
2211-1247

Volume Title

24

Publisher

Elsevier BV
Sponsorship
European Research Council (647479)