Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2015: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2014: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2013: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
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Outline of Final Research Achievements |
The origin of naturally produced brominated biphenyls (OH-BDE) was found in brown algae (Sargassum sp.) and bivalve (Spondylus sp.) in Southeast Asia (Philippines, Indonesia). Genetic analysis indicated the marine bacteria (Pseudoanteromonus sp) in the algae could produce OH-BDE, which are further methylated to methoxy metabolites (MeO-BDE) and accumulate in higher trophic organisms. Secondary metabolites (hydroxylated dioxins) during this process were found and partly distributed in fish. Human exposure to MeO-BDE may be readily metabolized in liver to OH-BDE by CYP2B6, which are retained in blood.
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