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• W2043402571 endingPage "3469" @default.
• W2043402571 startingPage "3469" @default.
• W2043402571 abstract "Oxidative damage to proteins, lipids, and DNA has been suggested to be a mechanism for age-related macular degeneration (AMD). The retina is particularly susceptible to lipid peroxidation due to high concentrations of easily oxidized polyunsaturated fatty acids in the presence of abundant oxygen. One of the most toxic products of lipid peroxidation, 4-hydroxy-2-nonenal (HNE), can modify and inactivate proteins. The hypothesis was that 4-HNE-modified proteins would accumulate and serve as a marker for progressive stages of AMD.Proteins containing HNE adducts were identified in both the macular and peripheral regions during four progressive stages of AMD. The proteins were resolved by two-dimensional (2-D) gel electrophoresis before detection of HNE-adducted proteins. Modified proteins were identified by matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF/MS). The total content of HNE adducts was compared using a slot blot immunoassay. One-dimensional Western blot analysis was used to measure levels of proteins involved in HNE detoxification.Nineteen proteins that were consistently modified regardless of stage of AMD or retinal region were identified. These proteins are involved in two main functions: energy production and stress response. No change in total HNE-adducted protein was observed between regions or stages. Modest increases in content of proteins involved in HNE detoxification were observed.Consistently modified proteins indicate preferred protein targets for oxidation by HNE. HNE-modified proteins were not different between regions or stages, suggesting that pathways for detoxification of HNE or removal of damaged proteins are adequate. Consistent levels of HNE-modified proteins suggest that HNE is not a sensitive retinal biomarker for AMD." @default.
• W2043402571 created "2016-06-24" @default.
• W2043402571 creator A5001734268 @default.
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• W2043402571 creator A5067991776 @default.
• W2043402571 creator A5071049390 @default.
• W2043402571 creator A5083116262 @default.
• W2043402571 date "2007-08-01" @default.
• W2043402571 modified "2023-09-30" @default.
• W2043402571 title "Age-Related Macular Degeneration and Retinal Protein Modification by 4-Hydroxy-2-nonenal" @default.
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• W2043402571 doi "https://doi.org/10.1167/iovs.06-1058" @default.
• W2043402571 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/17652714" @default.
• W2043402571 hasPublicationYear "2007" @default.
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