development of a novel imaging method for cancer therapy based on alteration of mitochondriafunction

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For the purpose of selection of cancer therapy, prediction of therapeutic effectandearlyjudgment of the therapy, weexplored development of a novel method to estimate mitochondria function which relates "apoptosis", or "oxygen". We obtained a radioiodinated labeled compound IDPP which accumulatesto a cell depending on mitochondrial membrane potential. On the other hand, the relationship between photodynamic therapy and alteration of cell function after PDT was estimated usinguptake value of FDG and MIBI as a marker. High PDT therapeuticeffect isexpected in case of high FDG uptake in tumor cells. And it was indicated thatthe decreasing ratio of MIBI uptake linearly relatedto PDT effect.