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- W2119465449 abstract "Rod, cone, cone-rod, and macular dystrophies eventually bring about the death of cone photoreceptor cells. The present study explores means of inhibiting apoptosis in addition to inducing a specific apoptotic pathway within a photoreceptor-derived cell line.Retinal cell culture of murine 661W photoreceptor-derived cells was used to assess the effect of both a synthetic peptide inhibitor of caspases (benzyloxycarbonyl-Val-Ala-DL-Asp-[Ome] fluoromethylketone [Z-VAD.FMK]) and a natural inhibitor, baculoviral p35. In addition, the effect of transfection of Fas-associated death domain (FADD), a cellular protein implicated in receptor-induced apoptosis, was assessed. Assays were performed by transient transfection of cell cultures, and results were recorded by cell counting, Western blot, and spectrophotometry.Western blot analysis and chromogenic caspase substrate cleavage analysis confirmed the activation of caspases within 661W cells. At a concentration of 80 micro M, Z-VAD.FMK, 72.36% +/- 0.93% of 661W cells survived cytotoxic insult compared with 6.99% +/- 1.35% of control cells. Transient transfection of 1200 ng baculoviral p35 conferred a protection of 75.30% +/- 4.23%, compared with 19.61% +/-1.84% of control cells, and it was additionally observed that as little as 50 ng transfection of FADD was capable of inducing the death of 53.21% +/- 1.33% of cells in 661W cultures.Apoptotic cell death in 661W cells is caspase dependent and may be inhibited with both a synthetic and natural inhibitor of caspase function. Furthermore, 661W cells are highly sensitive to the FADD protein, which may suggest a number of novel therapeutic approaches to halt photoreceptor cell apoptosis." @default.
- W2119465449 created "2016-06-24" @default.
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- W2119465449 date "2002-11-01" @default.
- W2119465449 modified "2023-09-23" @default.
- W2119465449 title "Sensitivity of photoreceptor-derived cell line (661W) to baculoviral p35, Z-VAD.FMK, and Fas-associated death domain." @default.
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