Article ; Online: Screening and evaluation of antioxidants for retinal pigment epithelial cell protection: L-ergothioneine as a novel therapeutic candidate through NRF2 activation.
2024 Volume 242, Page(s) 109862
Abstract: ... against oxidative stress and identified L-ergothioneine (EGT) as a potent cytoprotective agent. L ...
Abstract | The continual exposure of retinal tissues to oxidative stress leads to discernible anatomical and physiological alterations. Specifically, the onslaught of oxidative damage escalates the irreversible death of retinal pigmented epithelium (RPE) cells, pinpointed as the fundamental pathological event in dry age-related macular degeneration (AMD). There is a conspicuous lack of effective therapeutic strategies to counteract this degenerative process. This study screened a library of antioxidants for their ability to protect RPE cells against oxidative stress and identified L-ergothioneine (EGT) as a potent cytoprotective agent. L-ergothioneine provided efficient protection against oxidative stress-damaged RPE and maintained cell redox homeostasis and normal physiological functions. It maintained the normal structure of the retina in mice under oxidative stress conditions. Transcriptomic analysis revealed that EGT counteracted major gene expression changes induced by oxidative stress. It upregulated antioxidant gene expression and inhibited NRF2 translocation. The inhibition of NRF2 abolished EGT's protective effects, suggesting that NRF2 activation contributes to its mechanism of action. In conclusion, we identified EGT as a safe and effective small-molecule compound that is expected to be a novel antioxidative agent for treating AMD. |
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MeSH term(s) | Retinal Pigment Epithelium/drug effects ; Retinal Pigment Epithelium/metabolism ; Retinal Pigment Epithelium/pathology ; NF-E2-Related Factor 2/metabolism ; NF-E2-Related Factor 2/genetics ; Animals ; Ergothioneine/pharmacology ; Antioxidants/pharmacology ; Oxidative Stress/drug effects ; Mice ; Mice, Inbred C57BL ; Macular Degeneration/drug therapy ; Macular Degeneration/metabolism ; Macular Degeneration/pathology ; Cells, Cultured ; Humans ; Blotting, Western ; Disease Models, Animal ; Gene Expression Regulation/drug effects ; Reactive Oxygen Species/metabolism |
Chemical Substances | NF-E2-Related Factor 2 ; Ergothioneine (BDZ3DQM98W) ; Antioxidants ; Nfe2l2 protein, mouse ; Reactive Oxygen Species |
Language | English |
Publishing date | 2024-03-13 |
Publishing country | England |
Document type | Journal Article ; Research Support, Non-U.S. Gov't |
ZDB-ID | 80122-7 |
ISSN | 1096-0007 ; 0014-4835 |
ISSN (online) | 1096-0007 |
ISSN | 0014-4835 |
DOI | 10.1016/j.exer.2024.109862 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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