Dedifferentiation of the retinal pigment epithelium compared to the proliferative membranes of proliferative vitreoretinopathy

Toshiaki Abe, Masami Sato, Makoto Tamai

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Purpose. To examine the gene expression for melanogenesis of retinal pigment epithelial cells during dedifferentiation and to compare the condition to that of eyes obtaining anatomical success after surgery for proliferative vitreoretinopathy. Methods. Gene expression for melanogenesis was determined by reverse transcriptase-polymerase chain reaction of tyrosinase and tyrosinase-related protein-1 genes in normal and cultured retinal pigment epithelial cells and in proliferative membranes in patients with proliferative vitreoretinopathy. Results. Gene expression for melanogenesis was classified into three types during dedifferentiation of retinal pigment epithelial cells: (1) tyrosinase-related protein-1 gene expression, (2) tyrosinase and tyrosinase-related protein-1 gene expression and (3) no expression of these genes. The expression of these genes were maintained better in mediums with basic fibroblast growth factor than in medium without basic fibroblast growth factor. Of the anatomically unsuccessful patients with proliferative vitreoretinopathy treated by surgery, 76.9% showed both tyrosinase and tyrosinase-related protein-1 gene expression; only 20% of the anatomically successful patients showed the gene expression. Conclusions. We reported three different conditions of retinal pigment epithelial cells based on gene expression for melanogenesis during dedifferentiation. The different condition of the retinal pigment epithelial cells may have some relationship to the anatomical results for proliferative vitreoretinopathy surgery.

Original languageEnglish
Pages (from-to)1103-1109
Number of pages7
JournalCurrent Eye Research
Volume17
Issue number12
DOIs
Publication statusPublished - 1998

Keywords

  • Dedifferentiation
  • Epithelium (PVR)
  • Proliferative vitreoretinopathy (PVR)
  • Retinal pigment
  • Reverse transcriptase-polymerase chain reaction (RT-PCR)
  • Tyrosinase-related protein-1 (TRP-1)

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

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