| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
Protoporphyrin IX (PpIX)-dependent photodynamic diagnosis (PDD) and therapy (PDT) using 5-aminolevulinic acid (ALA-PDD and ALA-PDT) are widely recognized novel therapeutic strategies for the treatment of various cancers.Previously, we demonstrated that the balance between the influx of ALA through the transporter PEPT1 and the efflux of intracellular PpIX through the ABC transporter ABCG2 determines the sensitivity of cancer cells to ALA-PDT. Recently, we found that the Schiff base derivative TX-816 could significantly increase the effect of ALA-PDT. The ability of TX-816 to enhance the efficacy of ALA-PDT was markedly stronger than that of dipyridamole, which inhibits ABCG2 and equilibrative nucleoside transporters. Furthermore, TX-816 could recover the sensitivity to ALA-PDT in cancer cells with acquired resistance. These results indicate TX-816 is a potent lead compound to develop an ALA-PDT sensitizer.
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