A study of tobacco carcinogenesis XLIV. Bioassay in A J mice of some N-nitrosamines

A. Rivenson, M. V. Djordjevic, S. Amin, R. Hoffmann

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The evaluation of the tumorigenic activity in A J mouse lung of certain tobacco N-nitrosamines, namely 3-(methylnitrosamino)propionic acid (NMPA), 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and 4-(methylnitrosamino)-4-(3-pyridyl)-butyric acid (iso-NNAC), had the following results (total dose in μmol per mouse/lung tumors per mouse): NMPA ( 200 7.1 ± 2.9); NNK ( 2 15.7 ± 4.1); iso-NNAC ( 200 0.24 ± 0.43); saline control (0.2 ± 0.4). The tumorigenic activity of NMPA was not surprising since its lower homologue, N-nitrososarcosine, as well as its higher homologue, 4-(methylnitrosamino)-butyric acid, are known carcinogens. The high tumorigenic activity of NNK in strain A J mice confirms earlier findings as to its carcinogenic potency in rats and hamsters. The lack of tumorigenic activity of iso-NNAC supports the observation that the pyridyl rest adjacent to the nitrosamino group inhibits the activity of some tobacco-specific N-nitrosamines (TSNA). Iso-NNAC is most likely formed endogenously from the nicotine metabolites cotinine and 4-(methylamino)-4-(3-pyridyl)butyric acid.

Original languageEnglish (US)
Pages (from-to)111-114
Number of pages4
JournalCancer Letters
Issue number1-2
StatePublished - Sep 15 1989

All Science Journal Classification (ASJC) codes

  • Oncology
  • Cancer Research


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