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Pseudomonas aeruginosa pyocyanin directly oxidizes glutathione and decreases its levels in airway epithelial cells.
Production of pyocyanin enhances Pseudomonas aeruginosa virulence. Many of pyocyanin's in vitro and in vivo cytotoxic effects on human cells appear to result from its ability to redox cycle.Expand
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Oxidation of pyocyanin, a cytotoxic product from Pseudomonas aeruginosa, by microperoxidase 11 and hydrogen peroxide.
Pyocyanin (1-hydroxy-N-methylphenazine) is a cytotoxic pigment secreted by the bacterial species Pseudomonas aeruginosa, which frequently infects the lungs of immunosuppressed patients as well asExpand
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Reaction of melatonin and related indoles with hydroxyl radicals: EPR and spin trapping investigations.
It has been suggested that the indole hormone melatonin (N-acetyl-5-methoxytryptamine, MLT) is an important natural antioxidant and free radical scavenger [J. Pineal Res., 14:51; 1993]. In theExpand
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Subcellular localization of Pseudomonas pyocyanin cytotoxicity in human lung epithelial cells.
The Pseudomonas aeruginosa secretory product pyocyanin damages lung epithelium, likely due to redox cycling of pyocyanin and resultant superoxide and H(2)O(2) generation. Subcellular site(s) ofExpand
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Direct oxidation of 2',7'-dichlorodihydrofluorescein by pyocyanin and other redox-active compounds independent of reactive oxygen species production.
Formation of dichlorofluorescein (DCF), the fluorescent oxidation product of 2',7'-dichlorodihydrofluorescein (DCFH2), in cells loaded with the latter compound is often used to detect ROS formation.Expand
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The Pseudomonas secretory product pyocyanin inhibits catalase activity in human lung epithelial cells.
Pyocyanin, produced by Pseudomonas aeruginosa, has many deleterious effects on human cells that relate to its ability to generate reactive oxygen species (ROS), such as superoxide and hydrogenExpand
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Alterations in the Host Defense Properties of Human Milk Following Prolonged Storage or Pasteurization
Objectives: Preterm infants are often fed pasteurized donor milk or mother's milk that has been stored frozen for up to 4 weeks. Our objectives were to assess the impact of pasteurization orExpand
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Oxidation of the Spin Trap 5,5-Dimethyl-1-pyrroline N-Oxide by Singlet Oxygen in Aqueous Solution
The spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO) is frequently used to identify free radicals that are generated photochemically using dyes as photosensitizers. When oxygen is present in suchExpand
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THE PHOTOCHEMISTRY OF HUMAN RETINAL LIPOFUSCIN AS STUDIED BY EPR
Fluorescent material generated in the human retina accumulates within lipofuscin (HLF) granules of the retinal pigment epithelium (RPE) during aging. We have been investigating the possibleExpand
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Oxidation of biological electron donors and antioxidants by a reactive lactoperoxidase metabolite from nitrite (NO2-): an EPR and spin trapping study.
We report that a lactoperoxidase (LPO) metabolite derived from nitrite (NO2-) catalyses one-electron oxidation of biological electron donors and antioxidants such as NADH, NADPH, cysteine,Expand
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