Intraocular Sustained Release of EPO-R76E Mitigates Glaucoma Pathogenesis by Activating the NRF2/ARE Pathway. Academic Article uri icon

Overview

abstract

  • Erythropoietin (EPO) is neuroprotective in multiple models of neurodegenerative diseases, including glaucoma. EPO-R76E retains the neuroprotective effects of EPO but diminishes the effects on hematocrit. Treatment with EPO-R76E in a glaucoma model increases expression of antioxidant proteins and is neuroprotective. A major pathway that controls the expression of antioxidant proteins is the NRF2/ARE pathway. This pathway is activated endogenously after elevation of intraocular pressure (IOP) and contributes to the slow onset of pathology in glaucoma. In this study, we explored if sustained release of EPO-R76E in the eye would activate the NRF2/ARE pathway and if this pathway was key to its neuroprotective activity. Treatment with PLGA.EPO-E76E prevented increases in retinal superoxide levels in vivo, and caused phosphorylation of NRF2 and upregulation of antioxidants. Further, EPO-R76E activates NRF2 via phosphorylation by the MAPK pathway rather than the PI3K/Akt pathway, used by the endogenous antioxidant response to elevated IOP.

authors

  • Naguib, Sarah
  • DeJulius, Carlisle R
  • Backstrom, Jon R
  • Haider, Ameer A
  • Ang, John M
  • Boal, Andrew M
  • Calkins, David J
  • Duvall, Craig L
  • Rex, Tonia S

publication date

  • February 23, 2023

Identity

PubMed Central ID

  • PMC10045745

Scopus Document Identifier

  • 85055646681

Digital Object Identifier (DOI)

  • 10.1089/ars.2017.7342

PubMed ID

  • 36978804

Additional Document Info

volume

  • 12

issue

  • 3