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Published on: January 16, 2017
Enhanced expression of the complement factor H mRNA in proliferating human RPE cells
Norbert Kociok1, Antonia M Joussen
1Department of Ophthalmology, Heinrich Heine University, Duesseldorf, Germany. norbert.kociok@charite.de
Summary
Researchers identified decreased expression of complement factors H and I in retinal pigment epithelial (RPE) cells. This finding highlights the complement system's role in RPE cell function and retinal diseases like AMD and proliferative retinopathy.
Area of Science:
- Ophthalmology
- Molecular Biology
- Immunology
Background:
- Retinal pigment epithelial (RPE) cells are crucial in retinal and choroidal diseases.
- Proliferating RPE cells are implicated in proliferative vitreoretinopathy (PVR).
- Aging RPE cells are significant in age-related macular degeneration (AMD).
Purpose of the Study:
- To identify differentially expressed genes in proliferating human retinal pigment epithelial (RPE) cells.
- To model proliferating RPE cells using early passages of cultured cells.
Main Methods:
- Differential expression analysis (DEmRNA-PCR) to detect altered mRNA.
- Sequencing to identify detected mRNAs.
- Semi-quantitative RT-PCR, western blotting, and immunocytochemistry for verification.
Main Results:
- DEmRNA-PCR revealed decreased expression of complement factor H in passage 3 RPE cells compared to passage 0.
- mRNA and protein expression of complement regulatory factors H and I were confirmed in RPE cells.
- These complement factors were also detected in surgically removed epiretinal membranes.
Conclusions:
- Differential expression of complement factors H and I in RPE cells is confirmed.
- These factors are important in RPE cells, with implications beyond AMD.
- Complement system involvement in proliferative retinopathy is suggested by their presence in epiretinal membranes.
