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Related Experiment Videos

ATF-2 phosphorylation in apoptotic neuronal death

M Walton1, A M Woodgate, E Sirimanne

  • 1Department of Pharmacology, Faculty of Medicine and Health Science, University of Auckland, Auckland, New Zealand.

Brain Research. Molecular Brain Research
|December 5, 1998
PubMed
Summary

Phosphorylation of Activating Transcription Factor 2 (ATF-2) at Thr71 is increased in cells undergoing apoptosis. This finding suggests ATF-2 activation plays a role in neuronal cell death following stress.

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Area of Science:

  • Molecular Biology
  • Neuroscience
  • Cellular Stress Response

Background:

  • Activating transcription factor 2 (ATF-2) is a transcription factor involved in cellular stress responses.
  • ATF-2 activation requires post-translational modifications, specifically phosphorylation at Thr69 and Thr71.
  • The role of ATF-2 in neuronal apoptosis remains to be fully elucidated.

Purpose of the Study:

  • To investigate the role of ATF-2 activation in neuronal apoptosis.
  • To determine if phosphorylated ATF-2 is present in cells undergoing apoptosis.

Main Methods:

  • Immunocytochemistry using a phospho-specific ATF-2 (Thr71) antibody.
  • Analysis of 21-day-old rat brains following unilateral hypoxic-ischemic (HI) insult.
  • Culturing PC12 cells with okadaic acid.

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Main Results:

  • A significant increase in phosphorylated ATF-2 (at Thr71) was observed in both experimental models.
  • Increased ATF-2 phosphorylation was localized within cells undergoing apoptosis.
  • Both hypoxic-ischemic insult in vivo and okadaic acid treatment in vitro induced ATF-2 phosphorylation in apoptotic cells.

Conclusions:

  • ATF-2 activation, indicated by Thr71 phosphorylation, is associated with neuronal apoptosis.
  • These findings suggest that ATF-2 plays a role in the cellular mechanisms of neuronal cell death.
  • Targeting ATF-2 phosphorylation may offer a therapeutic strategy for conditions involving neuronal apoptosis.