Phospho-Site-Specific Antibody Microarray to Study the State of Protein
Phosphorylation in the Retina |
| Raju V.S. Rajala* |
| Departments of Ophthalmology and Cell Biology, and Dean A. McGee Eye Institute,
University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA |
| *Corresponding author: |
Raju V.S. Rajala Ph.D, University of Oklahoma Health Sciences Center
608 Stanton L. Young Blvd, Oklahoma City , OK 73104
Phone: 405-271-8255,
Fax: 405-271-8128,
E-mail: raju-rajala@ouhsc.edu
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| Received July 15, 2008; Accepted August 05, 2008; Published August 13, 2008 |
| Citation: Raju VSR (2008) Phospho-Site-Specific Antibody Microarray to Study the State of Protein Phosphorylation in the
Retina. J Proteomics Bioinform 1: 242-249. doi:10.4172/jpb.1000031 |
| Copyright: ©2008 Raju VSR. This is an open-access article distributed under the terms of the Creative Commons
Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original
author and source are credited. |
| Abstract |
Neurodegeneration is an important component of diabetic retinopathy as demonstrated by increased neural
apoptosis in the retina during experimental and human diabetes. Accumulation of sorbitol and fructose and the
generation or enhancement of oxidative stress has been reported in the whole retina of diabetic animals. Aldose
reductase (AR), the first and the rate limiting enzyme in the pathway reduces glucose to sorbitol and the diabetic
complications are prevented by drugs that inhibit AR. In this study we examined the phosphorylation state of
various retinal proteins in response to sorbitol-treatment by phospho-site-specific antibody microarray. Our
results suggest that various retinal protein kinases and cytoskeletal proteins either activated or down regulated
in response to sorbitol treatment. Further, our study also indicates the activation of retinal insulin- and insulin
growth factor 1 receptor and their downstream signaling proteins such as phosphoinositide 3-kinanse and protein
kinase B (Akt). Understanding the regulation of retinal proteins involved in polyol (sorbitol) pathway would
help to design therapeutic agents for the treatment of diabetic retinopathy. |
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