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- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국광과학회 Photochemical & photobiological sciences : an international journal Photochemical & photobiological sciences : an international journal 제8권 제10호
- 발행연도
- 2009.1
- 수록면
- 1,476 - 1,486 (11page)
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Singlet oxygen ($^1O_2$) is produced by leucocytes during inflammatory reactions, various biochemical reactions and during photoreactions. It deactivates by reacting with a number of targets to produce reactive oxygen species (ROS) and peroxides (that in turn produce ROS). To verify whether serum had the same capability to deactivate secondary oxidants after exposure to $^1O_2$, we provoked a photoreaction using rose bengal added to sera of 53 healthy donors and, after light delivery, reduced 2',7'-dichlorofluorescein (DCFH) was added at the end of irradiation and fluorescence of the oxidized derivative (DCF) was recorded. To avoid optical artifacts, we analyzed the influence of hemolysis. Deactivation capability of secondary oxidants after exposure to $^1O_2$ was stable over a long period of time, slightly different between men and women, but standard biochemistry parameters had little influence. Hemolysis, age and platelet number reduced deactivation of $^1O_2$-induced secondary oxidants. Addition of lysed cancer cells had no influence. Blood sampling in clot act tubes gave a better signal than in heparinized tubes. Red blood cells (RBCs) loaded with antioxidants strongly decreased deactivation of secondary oxidants. Assays are in progress to evaluate the clinical implications of these findings.
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