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Updated: Sep 4, 2026
Experimental Models for Study of Retinal Pigment Epithelial Physiology and Pathophysiology
Published on: November 7, 2010
[Inhibition of IL-6 antisense oligonucleotide on IL-6 expression by human retinal pigment epithelium in vitro]
Zongming Song1, Yannian Hui, Jia Qu
1Department of Ophthalmology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China. songzongming@263.net
Objective:
To investigate the inhibition of IL-6 antisense oligonucleotide (ASON) on IL-6 expression by retinal pigment epithelium (RPE) cells on the basis of previous study.
Methods:
Cultured human RPE cells was treated with IL-1 beta and IL-6 ASON. IL-6 mRNA and protein expression were detected by enzyme linked immunosorbent assay (ELISA), immunohistochemistry and in situ hybridization histochemistry (ISH).
Results:
It was demonstrated that the IL-6 expression by RPE cells was dose and time dependent after the stimulation of IL-1 beta. IL-6 in the conditioned media or in the control group was 2.00 x 10(-6) g/L cells after the exposed to IL-1 beta for 8 hours. IL-6 ASON (2.00 x 10(-5) mol/L) obviously inhibited IL-6 (5.50 x 10(-7) g/L cells, t = 4.518, P < 0.01) production. Immunohistochemistry study showed dark blue staining in RPE cytoplasm after stimulation with IL-1 beta, while the cells treated with IL-6 ASON showed light staining in RPE cytoplasma. ISH displayed that there was a marked reduction in mRNA expression in IL-6 ASON treated group compared with that in the control group (t = 3.746, P < 0.01).
Conclusion:
Cultured RPE cells express IL-6 protein and mRNA in dose and time dependent manners when RPE cells are stimulated with IL-1 beta. The expressions of IL-6 protein and mRNA can be significantly inhibited by IL-6 ASON in cultured human RPE cells.
Insights
Interleukin-6 (IL-6) antisense oligonucleotide (ASO) significantly reduces IL-6 protein and mRNA expression in human retinal pigment epithelium (RPE) cells. This inhibition is dose- and time-dependent following IL-1 beta stimulation.
Area of Science:
- Ophthalmology
- Molecular Biology
- Cell Biology
Context:
- Retinal pigment epithelium (RPE) cells play a crucial role in retinal health.
- Interleukin-6 (IL-6) is implicated in various ocular inflammatory conditions.
- Previous studies suggested a role for IL-6 in RPE cells.
Purpose:
- To investigate the inhibitory effect of IL-6 antisense oligonucleotide (ASO) on IL-6 expression in cultured human RPE cells.
- To determine the dose- and time-dependency of IL-6 expression following IL-1 beta stimulation.
- To validate the efficacy of IL-6 ASO in reducing both IL-6 mRNA and protein levels.
Summary:
- Human RPE cells were stimulated with IL-1 beta and subsequently treated with IL-6 ASO.
- IL-6 mRNA and protein levels were quantified using ELISA, immunohistochemistry, and in situ hybridization histochemistry (ISH).
- Results showed that IL-1 beta stimulation increased IL-6 expression in a dose- and time-dependent manner, which was significantly inhibited by IL-6 ASO.
Impact:
- Demonstrates that IL-6 ASO effectively suppresses IL-6 production in RPE cells.
- Provides evidence for the therapeutic potential of IL-6 ASO in treating ocular diseases involving RPE inflammation.
- Highlights the utility of ASO technology in modulating gene expression within the retinal context.
