2017 Fiscal Year Annual Research Report
Elucidation of useful livestock/poultry for Pb source estimation and its molecular mechanisms underlying species differences by integrated metallomics approaches
Project/Area Number |
16K16197
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Research Institution | Hokkaido University |
Principal Investigator |
中山 翔太 北海道大学, 獣医学研究院, 助教 (90647629)
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Project Period (FY) |
2016-04-01 – 2018-03-31
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Keywords | 鉛 / 汚染源推定 / 安定同位体比 / 家畜・家禽 / 歩哨動物 / LA-ICP-MS / 海馬 / 高感受性部位 |
Outline of Annual Research Achievements |
途上国を中心に、年間23万人が主に鉱床由来の鉛中毒により死亡し、60万人以上の子供の知的発達に影響を及ぼしているが、汚染源推定に有用な手法は確立されていない。鉛の生体内同位体分別により、低濃度暴露においては、人の血液・尿の鉛同位体比解析による推定が困難なためである。そこで、本研究では鉛汚染源推定に有用な家畜・家禽種を解明することを目的とした。鉛汚染地域であるザンビア・カブエ鉱床地域において、家畜・家禽であるヤギとニワトリを採材し、血液や臓器中の鉛同位体比をマルチコレクター誘導結合プラズマ質量分析計により高性能分析を実施した。土壌などの環境試料における同位体比とのマッピングおよび室内実験での鉛投与試験により、アフリカを含めた発展途上国で流通し、またヒトの食糧源としても用いられるこれらの家畜・家禽を用いることで、鉛汚染源の推定が可能であることを明らかにした。さらに、LA-ICP-MS(レーザー照射型 誘導結合プラズマ質量分析法)により、マウスにおける鉛の臓器内局所分布を解析した。脳の海馬領域の高濃度蓄積や、特に、腎臓の髄質において皮質よりも高濃度の鉛蓄積が確認された。鉛や他の有害金属の腎障害は、主に皮質に存在する近位尿細管に生じるため、近位尿細管(皮質)の高濃度蓄積を予想していたが、本研究結果は、高感受性部位と高蓄積部位は異なるということを示唆し、鉛の病理毒性学的な機序解明に貢献する知見である。以上の成果は、学術論文や国内外の学会で発表し、国際シンポジウムでの受賞など高い評価も受けている。さらに、当該研究課題は、平成30年度からの国際共同研究加速基金(国際共同研究強化)の新規課題に発展・拡大し、ザンビア大学との継続的な共同研究へと繋がった。
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[Journal Article] Human Health Risk from Consumption of Marine Fish Contaminated with DDT and its Metabolites in Maputo Bay, Mozambique.2018
Author(s)
Thompson L.A, Ikenaka Y, Yohannes Y.B, Ichise T, Ito G, Bortey-Sam N, van Vuren J.J, Wepener V, Smit N.J, Darwish W.S, Nakayama S.M.M, Mizukawa H, Ishizuka M.
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Journal Title
Bull. Environ. Contam. Toxicol
Volume: 印刷中
Pages: 印刷中
DOI
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] Concentrations and Human Health Risk Assessment of DDT and Its Metabolites in Free-range and Commercial Chicken Products from KwaZulu-Natal, South Africa2017
Author(s)
Thompson LA, Ikenaka Y, Yohannes YB, van Vuren JJ, Wepener V, Smit NJ, Darwish WS, Nakayama SMM, Mizukawa H, Ishizuka M
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Journal Title
Food Additives and Contaminants: Part A
Volume: 34
Pages: 1959-1969
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Lead levels in eggs in Kabwe, Zambia: implication of human exposure2018
Author(s)
Haruya Toyomaki, John Yabe, Shouta M.M. Nakayama, Yared B. Yohannes, Kaampwe Muzandu, Hazuki Mizukawa, Yoshinori Ikenaka, Hokuto Nakata, Takeshi Kuritani, Mitsuhiro Nakagawa, Mayumi Ishizuka
Organizer
Society of Toxicology’s 57th Annual Meeting and ToxExpo
Int'l Joint Research
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[Presentation] A Pilot Study on Exposure of Lead (Pb) and Its Blood Level Burden in Children from Kabwe, Zambia: Implication to the General Population2017
Author(s)
Yared B. Yohannes, Shouta M.M. Nakayama, Haruya Toyomaki, John Yabe, Kaampwe Muzandu, Andrew Kataba,Yoshinori Ikenaka, Hazuki Mizukawa, Russell Dowling, Jack Caravanos, Mayumi Ishizuka
Organizer
第26回環境化学討論会
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[Presentation] Introduction of “The project for Visualization of impact of chronic / latent chemical hazard and Geo-Ecological Remediation” in Kabwe, Zambia2017
Author(s)
Hokuto Nakata, Yoshitaka Uchida, Kaampwe Muzandu, Kawawa Banda, Shouta M.M. Nakayama, John Yabe, Toshifumi Igarashi, Mayumi Ito, Imasiku Nyambe, Mayumi Ishizuka
Organizer
The sixth Zambia Water Forum and Exhibition
Int'l Joint Research
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[Presentation] Trends of childhood blood lead levels and remedial options in Kabwe, Zambia2017
Author(s)
John Yabe, Haruya Toyomaki, Shouta MM Nakayama, Yared B. Yohannes,Kaampwe Muzandu, Andrew Kataba, Kennedy Choongo, Russell Dowling, Jack Caravanos, Yoshinori Ikenaka, Mayumi Ishizuka
Organizer
9th International Toxicology Symposium in Nigeria
Int'l Joint Research / Invited
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[Presentation] The relationship of Blood Lead Levels between mothers and infants in Kabwe, Zambia2017
Author(s)
Haruya Toyomaki, John Yabe, Shouta M.M. Nakayama, Yared B. Yohannes, Kaampwe Muzandu, Hazuki Mizukawa, Yoshinori Ikenaka, Hokuto Nakata, Russell Dowling, Jack Caravanos, Mayumi Ishizuka
Organizer
9th International Toxicology Symposium in Nigeria
Int'l Joint Research / Invited
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[Presentation] Wild rat’s bio-distribution analysis for pesticide DDT from South Africa2017
Author(s)
Tetsuro Ogawa, Yoshinori Ikenaka, Yared B Yohannes, Lesa Thompson, Johan van Vuren, Victor Wepener, Nico J Smit, Wynand Vlok, Shouta M M Nakayama, Hazuki Mizukawa, Mayumi Ishizuka
Organizer
9th International Toxicology Symposium in Nigeria
Int'l Joint Research
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[Presentation] 鳥類医学の発展に向けた新規腎障害マーカーの探索2017
Author(s)
石井千尋, 池中良徳, 川合佑典, 市居修, 中山翔太, 西村紳一郎, 大橋哲, 田中誠一, 齊藤慶輔, 渡邊有希子, 水川葉月, 石塚真由美
Organizer
日本鳥学会2017年度大会
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[Presentation] “First, do no harm” ? balancing the benefits of malaria control against the toxic effects of DDT use2017
Author(s)
Lesa THOMPSON, Yoshinori IKENAKA, Yared YOHANNES, Atnafu ASSEFA, Johan VAN VUREN, Victor WEPENER, Nico SMIT, Wynand VLOK, Wageh Sobhy DARWISH, Shouta NAKAYAMA, Hazuki MIZUKAWA and Mayumi ISHIZUKA
Organizer
The 5th Sapporo Summer Seminar for One Health (SaSSOH)
Int'l Joint Research
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[Presentation] Effect of DDTs on gallinacins in the avian immune system2017
Author(s)
Lesa Thompson, Yoshinori Ikenaka, Yared Yohannes, Johan van Vuren, Victor Wepener, Nico Smit, Atnafu Assefa, Wageh Sobhy Darwish, Shouta Nakayama, Hazuki Mizukawa, Mayumi Ishizuka
Organizer
The 10th International Meeting of the Asian Society of Conservation Medicine (ASCM), "One Health in Asia Pacific"
Int'l Joint Research
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[Presentation] Current trends of blood lead levels in Kabwe, Zambia2017
Author(s)
Yared BeyeneYohannes, John Yabe, Shota M.M. Nakayama, Haruya Toyomaki, Hokuto Nakata, Kaampwe Muzandu, Andrew Kataba, Golden Zyambo, Hazuki Mizukawa, Yoshinori Ikenaka, Russell Dowling, Jack Caravanos, Mayumi Ishizuka
Organizer
1st International KAMPAI Symposium on Sustainable Management of Resources and Environment in the 21st Century
Int'l Joint Research
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[Presentation] Extent of lead exposure in mothers and infants living around a "closed" lead mining area, Kabwe, Zambia2017
Author(s)
Haruya Toyomaki, John Yabe, Shouta M.M. Nakayama, Yared B. Yohannes, Kaampwe Muzandu, Hazuki Mizukawa, Yoshinori Ikenaka, Hokuto Nakata, Russell Dowling, Jack Caravanos, Mayumi Ishizuka
Organizer
1st International KAMPAI Symposium on Sustainable Management of Resources and Environment in the 21st Century
Int'l Joint Research
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[Presentation] Practical system integration for local community participation in lead contamination assessment in Kabwe, Zambia2017
Author(s)
Shinsaku Nakamura, Kazuyo Hirose, Tomomi Takeda, Yoshitaka Uchida, Hokuto Nakata, Shouta MM Nakayama, Mayumi Ishizuka, John Yabe, Mayumi Ito, Toshifumi Igarashi
Organizer
1st International KAMPAI Symposium on Sustainable Management of Resources and Environment in the 21st Century
Int'l Joint Research
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[Presentation] Elevated Blood Lead Levels among Children, Infants and Mothers in Kabwe, Zambia2017
Author(s)
Yared Beyene Yohannes, John Yabe, Shota M.M. Nakayama, Haruya Toyomaki, Kaampwe Muzandu, Yoshinori Ikenaka, Hazuki Mizukawa, Russell Dowling, Jack Caravanos, Hokuto Nakata, Mayumi Ishizuka
Organizer
SETAC North America 38th Annual Meeting
Int'l Joint Research
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[Book] 9th International Toxicology Symposium in Africa2017
Author(s)
Ikenaka Y, Darwish WS, Johan JV, Wepner V, Moundipa PF, Akoto O, Ikechukwu EL, Ogbomida E, Enuneku A, Beyene Y, Yabe J, Nakayama SMM, Mizukawa H, Ishizuka M
Total Pages
155
Publisher
Syobunsha
ISBN
978-0-620-76799-6
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