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Photosensitizers produce cytotoxic reactive oxygen species (ROS) upon light illumination, but it is difficult to ablate cells of a specific type (e.g., tumor cells) in the presence of other cell populations, because of the limited precision with which light illumination can be directed to small areas. Here, we report a strategy to achieve cell type-specific ablation by using an enzyme-activated off/on...
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...
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