Environment and Breast Cancer: Science Review


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simazine
CAS RN 122-34-9



Cancer studies: Mammary gland tumors
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Originating list
The list(s) or database(s) in which the chemical was identified as showing an increase in mammary gland tumors. CPDB: Carcinogenic Potency Database, IARC: International Agency for Research on Chemicals Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man summaries, NTP TR: National Toxicology Program (NTP) Technical Reports, NTP 11ROC: NTP 11th Report on Carcinogens, CCRIS: Chemical Carcinogenesis Research Information Service.
IARC Monographs
Mammary gland tumor summary
A summary of findings related to mammary gland tumors, most often excerpted from IARC Monographs or the NTP 11th ROC, and, in some cases, supplemented by our evaluation of individual studies and reviews, is available for the priority chemicals and 67 others.
Similar mechanism of action as atrazine, which shows evidence of incrased mammary gland tumors in rats.
Citations to review sources and individual studies reporting mammary gland tumors are listed below.
Citation
Source Type
Notes
International Agency for Research on Cancer, Monographs on the evaluation of carcinogenic risk of chemicals to man.VOL.: 73 (1999) (p. 625) Simazine. Summary of Data Reported and Evaluation.
Review
Administration by diet induced mammary tumors in female rats: Stevens 1994.
Stevens JT, Breckenridge CB, Wetzel LT, Gillis JH, Luempert LG, 3rd, Eldridge JC. Hypothesis for mammary tumorigenesis in Sprague-Dawley rats exposed to certain triazine herbicides. J Toxicol Environ Health. 1994 Oct;43(2):139-53.
Primary Literature
From IARC
National Toxicology Program 11th Report on Carcinogens, Table 1. Chemicals nominated to the National Toxicology Program for in-depth toxicological evaluation for carcinogenesis testing in fiscal years 1988-2003.
Review
Simazine (122-34-9) will be reviewed in place of acetachlor in a joint study between the NTP staff and representatives of Hungary.