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The Nrf2–ARE cytoprotective pathway in astrocytes

Published online by Cambridge University Press:  03 June 2009

Marcelo R. Vargas
Affiliation:
Division of Pharmaceutical Sciences, University of Wisconsin, Madison, WI, USA.
Jeffrey A. Johnson*
Affiliation:
Division of Pharmaceutical Sciences, University of Wisconsin, Madison, WI, USA. Waisman Center, Molecular and Environmental Toxicology Center, and Center for Neuroscience, University of Wisconsin, Madison, WI, USA.
*
*Corresponding author: Jeffrey A. Johnson, School of Pharmacy, 6125 Rennebohm Hall, 777 Highland Avenue, University of Wisconsin, Madison, WI 53705, USA. Tel.: +1 608 262 2893; Fax: +1 608 262 5345; E-mail: jajohnson@pharmacy.wisc.edu

Abstract

The expression of phase-II detoxification and antioxidant enzymes is governed by a cis-acting regulatory element named the antioxidant response element (ARE). ARE-containing genes are regulated by the nuclear factor erythroid-2-related factor 2 (Nrf2), a member of the Cap'n'Collar basic-leucine-zipper family of transcription factors. ARE-regulated genes are preferentially activated in astrocytes, which consequently have more efficient detoxification and antioxidant defences than neurons. Astrocytes closely interact with neurons to provide structural, metabolic and trophic support, as well as actively participating in the modulation of neuronal excitability and neurotransmission. Therefore, functional alterations in astrocytes can shape the interaction with surrounding cells, such as neurons and microglia. Activation of Nrf2 in astrocytes protects neurons from a wide array of insults in different in vitro and in vivo paradigms, confirming the role of astrocytes in determining the vulnerability of neurons to noxious stimuli. Here, we review the current data supporting Nrf2 activation in astrocytes as a viable therapeutic approach, not only in acute neuronal damage, but also in chronic neurodegeneration related to oxidative stress.

Type
Review Article
Copyright
Copyright © Cambridge University Press 2009

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References

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Further reading, resources and contacts

The website of the United States National Institute of Neurological Disorders and Stroke provides information for all major neurodegenerative diseases, possible treatments, current clinical trials information and contact information for organisations dedicated to a specific neurodegenerative disease:

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