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AMPK May Play an Important Role in the Retinal Metabolic Ecosystem

Emily E Brown1, Alfred S Lewin2, John D Ash3

  • 1Departments of Ophthalmology, Clinical and Translational Science Institute, Gainesville, FL, USA.

Advances in Experimental Medicine and Biology
|December 30, 2019
PubMed

Insights

Activating 5' adenosine monophosphate protein kinase (AMPK) with metformin protected against retinal degeneration in mouse models. This suggests AMPK activation may preserve retinal metabolic health and prevent vision loss.

Area of Science:

  • Ophthalmology
  • Metabolic pathways
  • Neuroprotection

Background:

  • Metabolic dysregulation is implicated in the etiology of retinal degenerations.
  • Preserving the retinal metabolic ecosystem may offer protection against these conditions.

Purpose of the Study:

  • To investigate the protective role of 5' adenosine monophosphate protein kinase (AMPK) activation in preclinical models of retinal degeneration.
  • To determine if metformin-induced AMPK activation can prevent or delay retinal degeneration.

Main Methods:

  • Utilized three preclinical mouse models: rd10 (retinitis pigmentosa), NaIO3 (RPE and retinal injury), and light-induced retinal degeneration.
  • Administered metformin to activate AMPK and assessed its effects on retinal structure and function.

Main Results:

  • Metformin-induced AMPK activation delayed or prevented retinal degeneration across all tested models.
  • Protection correlated with increased mitochondrial DNA copy number and ATP levels.
  • Observed reductions in oxidative stress and oxidative DNA damage.

Conclusions:

  • AMPK plays a crucial role in regulating the retinal metabolic ecosystem.
  • Activation of AMPK may represent a viable therapeutic strategy to prevent retinal degeneration by promoting metabolic health.
Keywords:
AMPKAdenosine monophosphate-activated protein kinaseAgingGlycolysisMetabolismNeuroprotectionRetina

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