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Updated: Sep 26, 2026

Measuring Composition of CD95 Death-Inducing Signaling Complex and Processing of Procaspase-8 in this Complex
Published on: August 2, 2021
Lens epithelial cells express CD95 and CD95 ligand treatment induces cell death and DNA fragmentation in vitro
A Hueber1, C D Eichholtz, N Kociok
1Center of Ophthalmology, University of Cologne, Cologne, Germany. Arno.Hueber@Uni-Koeln.de
Purpose:
Despite advances in intraocular lens design and material, posterior capsule opacification remains one of the major problems in modern cataract surgery. Therefore, the use of antiproliferative agents has been advocated. CD95 ligand (CD95L, Fas, Apo-1) is a death ligand that triggers apoptosis in susceptible target cells. Apoptosis allows for the safe disposal of cells without damaging the surrounding tissue. The goal of this study was to characterize and evaluate CD95L-induced cell death in cultured lens epithelial cells (LEC).
Methods:
Expression of CD95 in untreated porcine LEC was investigated by flow cytometry. Cell death after CD95L or CD95 agonistic antibody treatment was assessed by crystal violet assay and DNA fragmentation was measured by comet assay.
Results:
The presence of CD95 was observed in LEC. CD95L treatment resulted in a time--and concentration-dependent killing of LEC, which was synergistically enhanced by the addition of cyclohexamide. CD95L treatment induced DNA fragmentation.
Conclusions:
The present study confirms the use of apoptosis-inducing CD95L in the inhibition of LEC proliferation. Further studies are needed before clinical application of CD95L to inhibit posterior capsule opacification will be feasible.
Insights
CD95 ligand (CD95L) induces apoptosis in lens epithelial cells (LEC), offering a potential strategy to inhibit proliferation and prevent posterior capsule opacification after cataract surgery.
Area of Science:
- Ophthalmology
- Cell Biology
- Molecular Biology
Background:
- Posterior capsule opacification (PCO) is a common complication following cataract surgery.
- Antiproliferative agents are explored to mitigate PCO.
- CD95 ligand (CD95L) induces apoptosis, a programmed cell death mechanism.
Purpose of the Study:
- To characterize CD95L-induced apoptosis in cultured lens epithelial cells (LEC).
- To evaluate the potential of CD95L as an antiproliferative agent for preventing PCO.
Main Methods:
- Porcine LEC were analyzed for CD95 expression using flow cytometry.
- Cell death was quantified via crystal violet assay.
- DNA fragmentation was measured using the comet assay.
Main Results:
- Lens epithelial cells (LEC) express CD95.
- CD95L treatment caused time- and concentration-dependent cell death in LEC.
- Apoptosis was confirmed by DNA fragmentation, with synergistic enhancement by cyclohexamide.
Conclusions:
- Apoptosis-inducing CD95L effectively inhibits LEC proliferation.
- Further research is required for the clinical application of CD95L to prevent PCO.
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