Chemicals of interest have been tested for mutagenicity using a number of Salmonella tester strains. The chemicals studied, or being studied, were sodium bisulfite (SB), a series of nitrosamines, 2- and 4-acetylaminofluorene (2AAF and 4AAF), benzo(a)pyrene (BaP), pyrene, and a series of N-substituted phenanthreneimines. SB, an antioxidant, has been shown to be mutagenic at low pH, and the mutagenicity was bacterial strain-specific. The carcinogen-noncarcinogen pairs, 2AAF and 4AAF, and BaP and pyrene, were tested both in vitro and in the intrasanguineous host-mediated assay (HMA). All 4 chemicals are mutagenic in vitro, and the carcinogens (2AAF and BaP) gave consistently higher responses than the noncarcinogens (4AAF and pyrene). All 4 chemicals failed to induce significant mutagenic responses in the host-mediated assay. The cyclic nitrosamines are being tested in the HMA to determine if their pattern of organ-specific carcinogenicity can be predicted by any organ-specific mutagenicity detected in the HMA. The mutagenicity of the phenanthreneimines correlated with the electron-accepting or -donating ability of the substituent group, and inversely with their alkylating ability.

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
Intramural Research (Z01)
Project #
1Z01ES060102-07
Application #
4693244
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
7
Fiscal Year
1985
Total Cost
Indirect Cost
Name
U.S. National Inst of Environ Hlth Scis
Department
Type
DUNS #
City
State
Country
United States
Zip Code