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Zinc-coproporphyrin III (Zincphyrin) acts efficiently as a photodynamic therapy (PDT) agent in mice, while it shows no tumor cell-killing activity in vitro and has a high LD50 (low toxicity) in mice. It appears to have advantages over other porphyrins as a practical PDT reagent. In order to examine the action mechanism of Zincphyrin in PDT, we evaluated the photochemical characteristics of Zincphyrin...
To elucidate the mechanism of phototoxicity induced as a side effect by some of the new quinolone antibiotics, we studied sparfloxacin (SPFX), lomefloxacin, enoxacin, ofloxacin, and ciprofloxacin. We first examined the photosensitized formation of reactive oxygen species such as singlet oxygen (1O2) and superoxide anion (O−2) mediated by the new quinolones. Although a large number of studies have...
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