| Budget Amount *help |
¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Outline of Final Research Achievements |
In this study, to clarify the generation mechanism of breast cancer cells resistant to anti-breast cancer drug tamoxifen (TAM), and was intended to be the beginning of the resistance overcome. When a drug-metabolizing enzyme UGT1A4 that inactivates TAM in breast cancer cells was overexpressed, it was revealed that the intracellular concentrations of TAM is reduced by excretion as an inactive form via transporter MRP-1. Furthermore, unlike mechanism TAM resistance of the that have been reported so far in TAM resistant strain, that overexpression of the drug-metabolizing enzyme can be one of TAM resistance mechanism of breast cancer was suggested.
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