Open Access

Quantitative profiling of regional protein expression in rat retina after partial optic nerve transection using fluorescence difference two‑dimensional gel electrophoresis

  • Authors:
    • Chuen Lam
    • King Kit Li
    • Chi Wai Do
    • Henry Chan
    • Chi Ho To
    • Jacky Man Kwong Kwong
  • View Affiliations

  • Published online on: July 25, 2019     https://doi.org/10.3892/mmr.2019.10525
  • Pages: 2734-2742
  • Copyright: © Lam et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

To examine the difference between primary and secondary retinal ganglion cell (RGC) degeneration, the protein expression at four regions of retina including superior, temporal, inferior and nasal quadrant in a rat model of partial optic nerve transection (pONT) using 2‑D Fluorescence Difference Gel Electrophoresis (DIGE) were investigated. Unilateral pONT was performed on the temporal side of optic nerves of adult Wistar rats to separate primary and secondary RGC loss. Topographical quantification of RGCs labeled by Rbpms antibody and analysis of axonal injury by grading of optic nerve damage at 1 week (n=8) and 8 weeks (n=15) after pONT demonstrated early RGC loss at temporal region, which is considered as primary RGC degeneration and progressing RGC loss at nasal region, which is considered as secondary RGC degeneration. Early protein expression in each retinal quadrant (n=4) at 2 weeks after pONT was compared with the corresponding quadrant in the contralateral control eye by DIGE. For all comparisons, 24 differentially expressed proteins (>1.2‑fold; P<0.05; ≥3 non‑duplicated peptide matches) were identified by mass spectrometry (MS). Interestingly, in the nasal retina, serum albumin and members of crystallin family, including αA, αB, βA2, βA3, βB2 and gamma S indicating stress response were upregulated. By contrast, only αB and βA2 crystallin proteins were altered in temporal quadrant. In the superior and inferior quadrants, βB2 crystallin, keratin type I, S‑arrestin and lamin‑B1 were upregulated, while heat shock cognate 71 kDa protein and heterogeneous nuclear ribonucleoproteins A2/B1 were downregulated. In summary, the use of DIGE followed by MS is useful to detect early regional protein regulation in the retina after localized optic nerve injury.
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September 2019
Volume 20 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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APA
Lam, C., Li, K.K., Do, C.W., Chan, H., To, C.H., & Kwong, J.M. (2019). Quantitative profiling of regional protein expression in rat retina after partial optic nerve transection using fluorescence difference two‑dimensional gel electrophoresis. Molecular Medicine Reports, 20, 2734-2742. https://doi.org/10.3892/mmr.2019.10525
MLA
Lam, C., Li, K. K., Do, C. W., Chan, H., To, C. H., Kwong, J. M."Quantitative profiling of regional protein expression in rat retina after partial optic nerve transection using fluorescence difference two‑dimensional gel electrophoresis". Molecular Medicine Reports 20.3 (2019): 2734-2742.
Chicago
Lam, C., Li, K. K., Do, C. W., Chan, H., To, C. H., Kwong, J. M."Quantitative profiling of regional protein expression in rat retina after partial optic nerve transection using fluorescence difference two‑dimensional gel electrophoresis". Molecular Medicine Reports 20, no. 3 (2019): 2734-2742. https://doi.org/10.3892/mmr.2019.10525