Skip Navigation

This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Hasegawa, R.
Right arrow Articles by Takayama, S.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Hasegawa, R.
Right arrow Articles by Takayama, S.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© 1991 Oxford University Press

research-article

Synergistic enhancement of thyroid tumor induction by 2,4-diaminoanisole sulfate, N,N'-diethylthiourea and 4,4'-thiodianiline in male F344 rats

Ryohei Hasegawa, Tomoyuki Shirai, Kazuo Hakoi, Shigetsugu Wada, Ken Yamaguchi 1 and Shozo Takayama 2

First Department of Pathology, Nagoya City University Medical School 1-Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467, Japan
1Growth Factor Division, National Cancer Center Research Institute 5-1-1 Tsukiji, Chuo-ku, Tokyo 104, Japan
2National Cancer Center Research Institute 5-1-1 Tsukiji, Chuo-ku, Tokyo 104, Japan

Three thyroid carcinogens, 2,4-diaminoanisole sulfate (DAAS), N,N'-diethylthiourea (DETU) and 4,4'-thiodianiline (IDA), were simultaneously administered in the diet to male K344 rats at one-third the concentration of the reported TD50 levels (610, 200 and 46 p.p.m. respectively) for 52 weeks. The resultant incidence of thyroid adenocarcinomas in the combined treatment group (18/18: 100%) was significantly higher than those in each individual treatment group (DAAS, 0/21; DETU, 1/21; TDA, 2/20). Hepatocellular carcinomas (9/18, 50%) and lung adenomas (6/18, 33%) were also induced by the combined treatment, the incidences being higher than in the TDA group (3/20, 15% and 4/20, 20% respectively) to which these tumors were limited in the three groups treated with single chemicals. Thus, the results indicated that the three carcinogens exert apparent synergism in thyroid carcinogenesis when administered simultaneously.


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.