JNK signalling regulates antioxidant responses in neurons.

Chris Ugbode, Nathan Garnham, Laura Fort-Aznar, Gareth J O Evans, Sangeeta Chawla, Sean T Sweeney

Redox biology 2020 Oct

filter terms:

Reactive oxygen species (ROS) are generated during physiological bouts of synaptic activity and as a consequence of pathological conditions in the central nervous system. How neurons respond to and distinguish between ROS in these different contexts is currently unknown. In Drosophila mutants with enhanced JNK activity, lower levels of ROS are observed and these animals are resistant to both changes in ROS and changes in synapse morphology induced by oxidative stress. In wild type flies, disrupting JNK-AP-1 signalling perturbs redox homeostasis suggesting JNK activity positively regulates neuronal antioxidant defense. We validated this hypothesis in mammalian neurons, finding that JNK activity regulates the expression of the antioxidant gene Srxn-1, in a c-Jun dependent manner. We describe a conserved 'adaptive' role for neuronal JNK in the maintenance of redox homeostasis that is relevant to several neurodegenerative diseases. Copyright © 2020 The Author(s). Published by Elsevier B.V. All rights reserved.

Citation

Chris Ugbode, Nathan Garnham, Laura Fort-Aznar, Gareth J O Evans, Sangeeta Chawla, Sean T Sweeney. JNK signalling regulates antioxidant responses in neurons. Redox biology. 2020 Oct;37:101712