| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2016: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2015: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
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| Outline of Final Research Achievements |
The global spread of drug-resistant Plasmodium falciparum is a major obstacle to malaria treatment. Identification of drug resistance genes is crucial to efforts aimed at fighting resistant parasites, but most of them have remained unclear. In this study, we attempted to identify mefloquine- and chloroquine-resistance genes by our developed method. Briefly, high-coverage genomic libraries of a drug-resistant strain are directly generated in drug-sensitive parasites using the centromere plasmid and an improved transfection technique, and the drug resistance gene is then robustly identified from these libraries by drug screening. We successfully used this approach to identify multi-drug-resistant transporter 7, an ATP-binding cassette transporter, as a novel mefloquine resistance gene from a field-isolated parasite strain. In addition, plasmepsin VI was identified as novel chloroquine-resistance gene candidate.
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