Lack of antioxidative properties of vitamin C and pyruvate in cultured retinal pigment epithelial cells.
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Lack of antioxidative properties of vitamin C and pyruvate in cultured retinal pigment epithelial cells. / Zeitz, Oliver; Schlichting, Lars; Richard, Gisbert; Strauss, Olaf.
in: GRAEF ARCH CLIN EXP, Jahrgang 245, Nr. 2, 2, 2007, S. 276-281.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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TY - JOUR
T1 - Lack of antioxidative properties of vitamin C and pyruvate in cultured retinal pigment epithelial cells.
AU - Zeitz, Oliver
AU - Schlichting, Lars
AU - Richard, Gisbert
AU - Strauss, Olaf
PY - 2007
Y1 - 2007
N2 - BACKGROUND: Oxidative damage to the retinal pigment epithelium might be involved in the pathogenesis of age related macular degeneration. Thus antioxidative protection represents a rationale for a causative therapy or prophylaxis. The aim of the present study is to evaluate antioxidative properties of vitamin C and pyruvate at retinal pigment epithelial (RPE) cells exposed to oxidative stress. METHODS: The ability of vitamin C and pyruvate to quench hydroxyl radicals was tested using the di-hydro-rhodamine (DHR) assay. Cells of the human RPE cell line ARPE-19 were exposed for 8 min to hydroxyl radicals generated by the Fenton reaction from 2.25 mM H2O2 and 30 microM Fe3+ -nitrilo-tri-acetate. This was done in the absence and presence of 0.3-3.0 mM pyruvate and vitamin C, respectively. Cell survival was analysed by vitality staining (life-dead-assay) and expressed as cell survival ratio. A survival ratio
AB - BACKGROUND: Oxidative damage to the retinal pigment epithelium might be involved in the pathogenesis of age related macular degeneration. Thus antioxidative protection represents a rationale for a causative therapy or prophylaxis. The aim of the present study is to evaluate antioxidative properties of vitamin C and pyruvate at retinal pigment epithelial (RPE) cells exposed to oxidative stress. METHODS: The ability of vitamin C and pyruvate to quench hydroxyl radicals was tested using the di-hydro-rhodamine (DHR) assay. Cells of the human RPE cell line ARPE-19 were exposed for 8 min to hydroxyl radicals generated by the Fenton reaction from 2.25 mM H2O2 and 30 microM Fe3+ -nitrilo-tri-acetate. This was done in the absence and presence of 0.3-3.0 mM pyruvate and vitamin C, respectively. Cell survival was analysed by vitality staining (life-dead-assay) and expressed as cell survival ratio. A survival ratio
M3 - SCORING: Zeitschriftenaufsatz
VL - 245
SP - 276
EP - 281
JO - GRAEF ARCH CLIN EXP
JF - GRAEF ARCH CLIN EXP
SN - 0721-832X
IS - 2
M1 - 2
ER -