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• W2019254144 endingPage "1198" @default.
• W2019254144 startingPage "1198" @default.
• W2019254144 abstract "This study investigated whether the enzymatically inactive caspase mimetic IQACRG protects rat retinal ganglion cells (RGCs) from excitotoxic insults. Minimally invasive delivery of the peptide to the retina was explored, and the mechanisms of neuroprotection were elucidated.IQACRG was linked to penetratin (P-IQACRG) to facilitate cellular uptake. RGC labeling by biotinylated-P-IQACRG delivered via intravitreal or subconjunctival injection was demonstrated by avidin-biotin chemistry. The authors used histologic and electrophysiological measures to evaluate the neuroprotective potential of P-IQACRG against RGC death induced by N-methyl-D-aspartate (NMDA) in vitro and in vivo. In addition, they monitored activity of an enzyme that is downstream of caspase-1, matrix metalloproteinase-9 (MMP-9), and protein levels of the caspase-3/7 substrate, myocyte enhancer factor 2C (MEF2C), to determine the effectiveness of IQACRG in blocking excessive caspase activity.IQACRG significantly reduced NMDA-induced RGC death in culture and in vivo. Ex vivo electrophysiological recording of the retina on multielectrode arrays demonstrated functional rescue of RGCs by IQACRG. The authors also found that delivery of IQACRG to the retina inhibited NMDA-triggered MMP-9 activity and prevented cleavage of MEF2C protein that would otherwise have been engendered by caspase activation preceding RGC death. Strikingly, subconjunctival injection of P-IQACRG was very effective in preventing NMDA-induced RGC death in vivo.These data demonstrate that IQACRG protects RGCs from excitotoxicity in vitro and in vivo. The positive results with subconjunctival administration of P-IQACRG suggest that in the future this treatment may be useful clinically in diseases such as glaucoma and retinal ischemia." @default.
• W2019254144 created "2016-06-24" @default.
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• W2019254144 creator A5049332331 @default.
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• W2019254144 date "2010-02-01" @default.
• W2019254144 modified "2023-10-18" @default.
• W2019254144 title "Protection of Retinal Ganglion Cells by Caspase Substrate-Binding Peptide IQACRG from<i>N</i>-Methyl-<scp>d</scp>-Aspartate Receptor-Mediated Excitotoxicity" @default.
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• W2019254144 doi "https://doi.org/10.1167/iovs.09-4102" @default.
• W2019254144 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2868456" @default.
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