Oral Administration of Dimethylarsinic Acid, a Main Metabolite of Inorganic Arsenic, in Mice Promotes Skin Tumorigenesis Initiated by Dimethylbenz(a)anthracene with or without Ultraviolet B as a Promoter.
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- YAMANAKA Kenzo
- College of Pharmacy, Nihon University
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- MIZOI Mutsumi
- College of Pharmacy, Nihon University
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- KATO Koichi
- College of Pharmacy, Nihon University
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- HASEGAWA Akira
- College of Pharmacy, Nihon University
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- NAKANO Masayuki
- National Mito Hospital
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- OKADA Shoji
- School of Pharmaceutical Sciences, University of Shizuoka
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Concerning arsenic-induced tumorigenesis, an animal model must be developed for understanding the mechanism of human carcinogenesis by arsenics. To determine whether orally administered dimethylarsinic acid (DMA) promotes and causes the progression of skin tumorigenesis, an animal protocol by topical application of dimethylbenz(a)anthracene (DMBA) with or without UVB, a tumor promoter, in hairless mice was used. The administration of DMA by the oral route promoted not only the formation of papillomas induced by DMBA alone but also the formation of malignant tumors induced by way of the formation of atypical keratoses by treatment with DMBA and UVB. A phenomenon, the progression of keratoses→atypical keratoses→squamous cell carcinomas (SCCs), observed in the present study may resemble the development of tumors in arsenic-exposed humans. We also discussed the involvement of a reactive oxygen species (ROS), e.g., the dimethylarsenic peroxy radical [(CH3)2AsOO·], produced during the metabolic processing of DMA, in skin and in multi-organ tumorigenesis.
収録刊行物
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- Biological & Pharmaceutical Bulletin
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Biological & Pharmaceutical Bulletin 24 (5), 510-514, 2001
公益社団法人 日本薬学会
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詳細情報 詳細情報について
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- CRID
- 1390001204626626432
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- NII論文ID
- 110003638503
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- NII書誌ID
- AA10885497
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- COI
- 1:CAS:528:DC%2BD3MXjt1altr0%3D
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- ISSN
- 13475215
- 09186158
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- NDL書誌ID
- 5764939
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- PubMed
- 11379771
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- PubMed
- CiNii Articles
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- 使用不可