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GSK-3β, a double-edged sword in Nrf2 regulation: Implications for neurological dysfunction and disease

Megan Culbreth1, Michael Aschner2

  • 1Department of Environmental Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY, 14642, USA.

F1000Research
|August 7, 2018
PubMed

Insights

Glycogen synthase kinase 3β (GSK-3β) inhibits the Nrf2 oxidative stress pathway. Its distinct role in neurodegenerative decline, beyond general oxidative stress, remains unclear in conditions like Alzheimer's disease and brain ischemia.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Biochemistry

Background:

  • Glycogen synthase kinase 3β (GSK-3β) is known to modulate the nuclear factor erythroid 2-related factor 2 (Nrf2) pathway.
  • GSK-3β acts as an inhibitor of Nrf2 activation and post-induction.
  • Oxidative stress is implicated in neurological dysfunction, making the Nrf2 pathway a therapeutic target.

Purpose of the Study:

  • To investigate the specific role of GSK-3β mediated Nrf2 inhibition in neurological decline.
  • To explore the influence of this pathway in Alzheimer's disease and brain ischemia.
  • To determine if GSK-3β has a distinct function in neurodegeneration separate from general oxidative stress responses.

Main Methods:

  • Literature review and analysis of existing studies on GSK-3β and Nrf2.
  • Examination of evidence linking GSK-3β/Nrf2 pathway to Alzheimer's disease.
  • Assessment of the pathway's role in brain ischemia models.

Main Results:

  • Evidence suggests GSK-3β inhibits Nrf2, impacting oxidative stress response.
  • The specific contribution of this inhibition to neurodegenerative diseases like Alzheimer's and ischemia is not well-established.
  • A unique function of GSK-3β in neurodegeneration, beyond oxidative stress, is currently unsubstantiated.

Conclusions:

  • The precise role of GSK-3β in modulating Nrf2 and its impact on neurodegenerative diseases requires further investigation.
  • Clarifying GSK-3β's distinct functions in nervous system decline is crucial for therapeutic development.
  • Current evidence does not conclusively support a unique role for GSK-3β mediated Nrf2 inhibition in neurodegeneration.
Keywords:
GSK-3βNrf2oxidative stress

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