Proteome map of normal rat retina and comparison with the proteome of diabetic rat retina: New insight in the pathogenesis of diabetic retinopathy

Godfrey J. Quin*, Alice C.L. Len, Frank A. Billson, Mark C. Gillies

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)

Abstract

We have employed proteomics to establish a proteome map of the normal rat retina. This baseline map was then used for comparison with the early diabetic rat retinal proteome. Diabetic rat retinae were obtained from Dark Agouti rats after 10 wk of streptozotocin-induced hyperglycaemia. Extracted proteins from normal and diabetic rat retinae were separated and compared using 2-DE. A total of 145 protein spots were identified in the normal rat retina using MALDI-MS and database matching. LC-coupled ESI-MS increased the repertoire of identified proteins by 23 from 145 to 168. Comparison with early diabetic rat retinae revealed 24 proteins unique to the diabetic gels, and 37 proteins absent from diabetic gels. Uniquely expressed proteins identified included the HSPs 70.1A and 8, and platelet activating factor. There were eight spots with increased expression and 27 with decreased expression on diabetic gels. Beta catenin, phosducin and aldehyde reductase were increased in expression in diabetes whilst succinyl coA ligase and dihydropyrimidase-related protein were decreased. Identification of such changes in protein expression has given new insights and a more comprehensive understanding of the pathogenesis of diabetic retinopathy, widening the scope of potential avenues for new therapies for this common cause of blindness.

Original languageEnglish
Pages (from-to)2636-2650
Number of pages15
JournalProteomics
Volume7
Issue number15
DOIs
Publication statusPublished - Aug 2007

Keywords

  • Diabetes
  • Diabetic retinopathy
  • Proteome map
  • Two-dimensional gel electrophoresis

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