N-Nitroso-N-methyl-4-aminobutyric acid (NMBA) is a tobacco-specific nitrosamine carcinogen.1It is oxidized to the reactive metabolite methyl-2-oxopropylnitrosamine (MOPN) in isolated rat liver mitochondria.2NMBA induces bladder transitional cell carcinomas in rats when administered in the drinking water at a concentration of 300 mg L per day.3
N-Nitroso sarcosine is a carcinogen and nitrosation product of sarcosine that has been found in cured meat products.1,2In vivo, N-nitroso sarcosine (225 mg kg) induces the formation of metastatic liver carcinomas in mice.2 1.Janzowski, C., Eisenbrand, G., and Preussmann, R.Occurrence of N-nitrosamino acids in cured meat products and their efffect on formation of N-nitrosamines during heatingFood Cosmet. Toxicol.16(4)343-348(1978) 2.Wogan, G.N., Paglialunga, S., Archer, M.C., et al.Carcinogenicity of nitrosation products of ephedrine, sarcosine, folic acid, and creatinineCancer Res.35(8)1981-1984(1975)
MeIQx (MeIQx) is a food-derived carcinogen that has been found in high temperature-cooked fish and meats.1It is activated by hydroxylation and subsequent O-acetylationviathe cytochrome P450 (CYP) isoform CYP1A2 and N-acetyltransferase 2, respectively, in UV5 cells expressing the human enzymes to a metabolite that reacts with DNA to form adducts.2MeIQx (200 and 400 ppm in the diet) induces tumor formation in rats.3
Hexestrol dibutyrate is a synthetic ER agonist, microtubule polymerization inhibitor, and potential carcinogen. It induces mitotic arrest, aneuploidy, and DNA adduct formation.
N’-Nitrosonornicotine is a tobacco-specific N-nitrosamine and carcinogen that has been found in unburned tobacco and cigarette smoke.1It induces the formation of DNA adducts in isolated rat nasal mucosa and esophagus. N’-Nitrosonornicotine induces tumor formation in rat esophagus and nasal cavity, mouse lung, forestomach, and trachea, and hamster trachea and forebrain. Urinary levels of N’-nitrosonornicotine are positively correlated with the risk of esophageal cancer in smokers.2 1.Hecht, S.S.Biochemistry, biology, and carcinogenicity of tobacco-specific N-nitrosaminesChem. Res. Toxicol.11(6)559-603(1998) 2.Yuan, J.-M., Knezevich, A.D., Wang, R., et al.Urinary levels of the tobacco-specific carcinogen N’-nitrosonornicotine and its glucuronide are strongly associated with esophageal cancer risk in smokersCarcinogenesis32(9)1366-1371(2011)
Hexestrol diphosphate sodium is a synthetic ER agonist, microtubule polymerization inhibitor, and potential carcinogen. It induces mitotic arrest, aneuploidy, and DNA adduct formation.
Hexestrol diphosphate tetrasodium is a synthetic ER agonist, microtubule polymerization inhibitor, and potential carcinogen. It induces mitotic arrest, aneuploidy, and DNA adduct formation.
Hexestrol dipropionate is a synthetic ER agonist, microtubule polymerization inhibitor, and potential carcinogen. It induces mitotic arrest, aneuploidy, and DNA adduct formation.