RGD Reference Report - Effects of antioxidant gene therapy on retinal neurons and oxidative stress in a model of retinal ischemia/reperfusion. - Rat Genome Database

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Effects of antioxidant gene therapy on retinal neurons and oxidative stress in a model of retinal ischemia/reperfusion.

Authors: Liu, Y  Tang, L  Chen, B 
Citation: Liu Y, etal., Free Radic Biol Med. 2012 Mar 1;52(5):909-15. doi: 10.1016/j.freeradbiomed.2011.12.013. Epub 2011 Dec 24.
RGD ID: 8158043
Pubmed: PMID:22240151   (View Abstract at PubMed)
DOI: DOI:10.1016/j.freeradbiomed.2011.12.013   (Journal Full-text)

Retinal ischemia/reperfusion (I/R) results in neuronal death and generation of reactive oxygen species. The aim of this study was to investigate the neuroprotective effect of manganese superoxide dismutase (SOD2) on retinal ganglion cells (RGCs) in an I/R-induced retinal injury model. One eye of each Wistar rat was pretreated with recombinant adeno-associated virus containing the SOD2 gene (AAV-SOD2) or recombinant AAV containing the GFP gene (AAV-GFP) by intravitreal injection 21 days before initiation of I/R injury. Retinal I/R injury was induced by elevating intraocular pressure for 1h, and reperfusion was established immediately afterward. The number of RGCs and the inner plexiform layer (IPL) thickness were measured by Fluorogold retrograde labeling and hematoxylin and eosin staining at 6 h, 24 h, 72 h, and 5 days after injury. Superoxide anion, the number of RGCs, IPL thickness, malondialdehyde (MDA) level, 8-hydroxy-2-deoxyguanosine (8-OHdG) level, MnSOD (manganese superoxide dismutase) activity, and nitrotyrosine level were measured by fluorescence staining, immunohistochemistry, and enzyme-linked immunosorbent analysis at 5 days after I/R injury. Severe RGC loss, reduced IPL thickness, reduced MnSOD activity, and increased superoxide ion, MDA, 8-OHdG, and nitrotyrosine production were observed after I/R injury. Administration of AAV-SOD2 significantly reduced the levels of superoxide ion, MDA, 8-OHdG, and nitrotyrosine and prevented the damage to RGCs and IPL. Delivery of the antioxidant gene inhibited I/R-induced RGC and IPL damage by reducing oxidative stress and nitrative stress, suggesting that MnSOD may be relevant for the neuroprotection of the inner retina from I/R-related diseases.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
Retina Reperfusion Injury treatmentIDA 8158043 RGD 
Retina Reperfusion Injury  ISOSod2 (Rattus norvegicus)8158043; 8158043protein:decreased activity:retina:RGD 
Retina Reperfusion Injury treatmentISOSOD2 (Homo sapiens)8158043; 8158043 RGD 
Retina Reperfusion Injury  IEP 8158043protein:decreased activity:retina:RGD 

Objects Annotated

Genes (Rattus norvegicus)
Sod2  (superoxide dismutase 2)

Genes (Mus musculus)
Sod2  (superoxide dismutase 2, mitochondrial)

Genes (Homo sapiens)
SOD2  (superoxide dismutase 2)


Additional Information