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. 1983 Mar;49:51–58. doi: 10.1289/ehp.834951

Role of tissue exposure and DNA lesions for organ-specific effects of carcinogenic trans-4-acetylaminostilbene in rats.

H G Neumann
PMCID: PMC1569147  PMID: 6832097

Abstract

trans-4-Acetylaminostilbene is acutely toxic to the glandular stomach and produces sebaceous gland tumors in rats quite specifically. Metabolism, tissue exposure to reactive metabolites, DNA binding and persistence of DNA lesions are implicated in tissue susceptibility, but nothing indicates that one of these parameters determines the biological effect. All tissues are exposed to reactive metabolites, liver as a nontarget tissue ranking highest. DNA binding in this tissue, however, is not irrelevant to tumor formation, but rather indicates the presence of initiating lesions. They can be amplified by partial hepatectomy and/or promoters, such as phenobarbital, DDT and diethylstilbestrol. Liver tumors are formed in high yields with these treatments, and mammary tumors also occur. trans-4-Acetylaminostilbene is therefore considered to be an incomplete carcinogen in these tissues and may initiate cells in other tissues as well. Apparently it lacks promoting properties which are supposed to be unrelated to reactive metabolites. It is concluded that DNA lesions do not reflect tissue risk, but rather secondary effects ultimately determine where the process of tumor formation starts and how fast it develops.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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