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Activating transcription factor 3 and the nervous system.
David Hunt1, Gennadij Raivich, Patrick Norval Anderson
1Medical Education Centre, Newham University Hospital London, UK.
Frontiers in Molecular Neuroscience
|February 21, 2012
Summary
Activating transcription factor 3 (ATF3) is an adaptive response gene upregulated by stress, particularly in neurons and glia after injury. It plays a key role in neuronal survival, axonal regeneration, and regulating immune responses.
Area of Science:
- Neuroscience
- Molecular Biology
- Immunology
Background:
- Activating transcription factor 3 (ATF3) is part of the ATF/cyclic AMP responsive element binding family.
- It's known as an adaptive response gene, typically regulated by stress.
- ATF3 can act as a transcriptional repressor but also activate genes through interactions with other factors like c-Jun.
Purpose of the Study:
- To explore the role of ATF3 in neuronal survival and axonal regeneration following injury.
- To investigate ATF3's function in regulating Toll-like receptor (TLR) signaling and innate immune responses.
Main Methods:
- Analysis of ATF3 expression patterns in neurons and glia under normal and injury conditions.
- Investigating the impact of ATF3 on neuronal survival and axon regeneration after axotomy.
- Examining ATF3's interaction with TLR signaling pathways.
Main Results:
- ATF3 expression is low in healthy neurons and glia but rapidly increases after injury.
- Elevated ATF3 levels in neurons are linked to improved survival and axonal regeneration.
- In peripheral nerves, ATF3 promotes a Schwann cell phenotype supporting regeneration.
- ATF3 negatively regulates TLR signaling, suppressing innate immune responses.
Conclusions:
- ATF3 is a critical factor in the adaptive response to neuronal injury, promoting survival and regeneration.
- Its role extends to modulating immune responses via TLR signaling, influencing neuronal recovery.
- Understanding ATF3's functions offers potential therapeutic targets for neurological repair.
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