2009 Fiscal Year Final Research Report
Evaluation of effects of aldehyde dehydrogenase on oxidative stress
| Project/Area Number |
19310043
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Risk sciences of radiation/Chemicals
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| Research Institution | University of Occupational and Environmental Health, Japan |
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Principal Investigator |
KUNUGITA Naoki University of Occupational and Environmental Health, Japan, 生活環境部, 部長 (90178020)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIDA Yasuhiro 産業医科大学, 医学部, 准教授 (10309958)
KAWAMOTO Toshihiro 産業医科大学, 医学部, 教授 (60177748)
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| Project Period (FY) |
2007 – 2009
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| Keywords | アルデヒド脱水素酵素 / 酸化ストレス / ヘモグロビン付加体 / Aldh2ノックアウトマウス / アセトアルデヒド / ミトコンドリアDNA / 体細胞突然変異 |
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| Research Abstract |
Aldehyde dehydrogenase-2 (ALDH2) metabolizes acetaldehyde produced from ethanol into acetate and plays a major role in the oxidation of acetaldehyde in vivo. Half of Japanese have inactive ALDH2. In order to investigate the mutagenicity of acetaldehyde, micronucleus (MN) assay and T cell receptor (TCR) gene mutation assay were performed in Aldh2 KO mice and wild type (Aldh2 WT) mice exposed to acetaldehyde or ethanol in vivo. We also observed the urine 8-hydroxy-2'-deoxyguanosine (8-OHdG), hemoglobin-associated acetaldehyde (Hb-AA), and mutation on tRNA gene of mitochondrial DNA. In results, frequencies of micronuclei in reticulocytes significantly increased by acetaldehyde exposure in Aldh2 KO mice, but not in Aldh2 WT mice. In addition, frequencies of micronuclei, TCR mutation, and 8-OHdG levels in urine were significantly high in Aldh2 KO mice than in Aldh2 WT mice even in control groups. These results indicate that Aldh2 plays a major role not only in acetaldehyde detoxification but also in oxidative stress in mice.
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[Presentation] アルデヒド脱水素酵素2ノックアウトの呼吸器系組織におけるアセトアルデヒド感受性2007
Author(s)
小山倫浩, 一瀬豊日, PHAM Thi Thu Phuong, 小川真規, 山口哲右, 木長健, 八嶋康典, 尾崎真一, 松本明子, 市場正良, 欅田尚樹, 川本俊弘
Organizer
第80回日本産業衛生学会
Place of Presentation
大阪市
Year and Date
20070400
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