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Induction of activating transcription factor 3 (ATF3) by peripheral nerve compression
Anders Isacsson1, Martin Kanje, Lars B Dahlin
1Department of Hand Surgery, Malmö University Hospital Malmö, Sweden.
Summary
Severe nerve compression in rats triggers nuclear translocation of activating transcription factor 3 (ATF3) in sensory neurons. This ATF3 response is linked to nerve injury duration and partially correlates with functional recovery.
Area of Science:
- Neuroscience
- Cell Biology
- Regenerative Medicine
Background:
- Activating transcription factor 3 (ATF3) serves as a key marker for neuronal injury.
- Understanding ATF3's role is crucial for developing strategies for nerve repair and regeneration.
Purpose of the Study:
- To investigate the nuclear translocation of ATF3 in sensory neurons following chronic nerve compression.
- To correlate ATF3 expression with nerve function and compression duration.
Main Methods:
- Utilized immunocytochemistry to detect ATF3 in dorsal root ganglia and sciatic nerves of rats subjected to chronic compression.
- Assessed functional recovery through measurements of toe spreading and muscle force.
Main Results:
- ATF3 immunoreactivity was observed in the nuclei of sensory neurons and Schwann cells in compressed nerves.
- Decompression did not alter ATF3 levels in dorsal root ganglia.
- Impaired nerve function showed partial improvement over four weeks, correlating with ATF3 expression.
Conclusions:
- Chronic nerve compression induces nuclear translocation of ATF3, a transcription factor linked to neuronal survival and regeneration.
- The ATF3 response is dependent on the duration of compression and shows a partial correlation with functional outcomes.
