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Phloxine B (PhB; 2′,4′,5′,7′-tetrabromo-4,5,6,7-tetrachloro-fluorescein), an artificial xanthene colorant, has been used as a red coloring agent in drugs and cosmetics as well as foods in some countries. However, little effort has been devoted to the study of this colorant as a potentially useful medicinal agent.We investigated the daily light-induced photocytotoxicity of PhB in two human leukemia...
Epithelial xanthine oxidase (XOD) is one of the major enzymes responsible for superoxide (O 2- ) generation, which is involved in oxidative stress. However, there are few known reports of a convenient bioassay to detect cellular XOD activity. We tested several cell lines, and found that AS52, from Chinese hamster ovary cells, produced a significant level of O 2- in response...
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