Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/26581
Title: Application of fluorescence difference gel electrophoresis technology in searching for protein biomarkers in chick myopia
Authors: Lam, TC
Li, KK
Lo, SCL 
Guggenheim, JA
To, CH 
Keywords: Chick
DIGE
Mass spectrometry
Myopia
Proteomics
Retina
Two-dimensional gel electrophoresis
Issue Date: 2007
Publisher: Amer Chemical Soc
Source: Journal of proteome research, 2007, v. 6, no. 11, p. 4135-4149 How to cite?
Journal: Journal of Proteome Research 
Abstract: The lens-induced myopia (LIM) in response to concave lens (negative lens) is a well established animal model for studying myopia development. However, the exact visual and neurochemical signaling mechanisms involving myopic eye growth are yet to be elucidated. The feasibility of applying a novel two-dimensional fluorescence difference gel electrophoresis technique for global protein profilings and a search for differential protein expressions in LIM were explored in the present study. Two-dimensional Polyacrylamide gel electrophoresis was performed employing a "minimal Lysine labeling" approach and a reverse CyeDye experimental protocol using retinal tissue from chicks. The retinal protein profiles between myopic and control eyes were found to be very similar. More than a thousand protein spots could be detected on a 2D gel. Sixteen and ten protein spots were found to be up-regulated and down-regulated respectively in the myopic eyes according to our preset criteria with the inclusion of an internal pool standard. About 65% of those filtered spots could be successfully identified by peptide mass fingerprinting by matrix-assisted laser desorption ionization-time-of-flight mass spectrometry. Most of the differentially expressed proteins were found to be related to cytoskeletal or oxidative functions. According to the prediction of subcellular locations, most of them (about 84%) were classified as cytoplasmic proteins. The cellular functions for those differentially expressed proteins were reported and their possible involvements in the compensated eye growth were discussed. We have optimized a workable protocol for the study of the differential retinal protein expressions in the LIM using 2D-DIGE approach which was shown to have a number of advantages over the traditional 2D electrophoresis technique.
URI: http://hdl.handle.net/10397/26581
DOI: 10.1021/pr0701097
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