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- W2004585142 abstract "We investigated the ability of the different wavelength regions of UV radiation, UVA (320-400 nm), UVB (290-320 nm) and UVC (200-290 nm), to induce hemolysis. Sheep erythrocytes were exposed to radiation from either a UVA1 (> 340 nm) sunlamp, a UVB sunlamp, or a UVC germicidal lamp. The doses used for the three wavelength regions were approximately equilethal to the survival of L5178Y murine lymphoma cells. Following exposure, negligible hemolysis was observed in the UVB- and UVC-irradiated erythrocytes, whereas a decrease in the relative cell number (RCN), indicative of hemolysis, was observed in the UVA1-exposed samples. The decrease in RCN was dependent on dose (0-1625 kJ/m2), time (0-78 h postirradiation) and cell density (10(6)-10(7) cells/mL).. Hemolysis decreased with increasing concentration of glutathione, hemoglobin or cell number, while the presence of pyruvate drastically enhanced it. Because scanning spectroscopy (200-700 nm) showed that hemoproteins and nicotinamide adenine dinucleotides were oxidized, cytoplasmic oxidative stress was implicated in the lytic mechanism. Further evidence of oxidation was obtained from electron micrographs, which revealed the formation of Heinz bodies near the plasma membrane. The data demonstrate that exposure of erythrocytes to UVA1, but not UVB or UVC, radiation causes oxidation of cytoplasmic components, which results in cytoskeletal damage and hemolysis." @default.
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- W2004585142 date "1993-05-01" @default.
- W2004585142 modified "2023-10-06" @default.
- W2004585142 title "LONG‐WAVELENGTH UVA RADIATION INDUCES OXIDATIVE STRESS, CYTOSKELETAL DAMAGE and HEMOLYSIS*" @default.
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- W2004585142 doi "https://doi.org/10.1111/j.1751-1097.1993.tb02965.x" @default.
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