The Testing of four UKEMS Trial Compounds for Bacterial Mutation in the Salmonella/Microsome Assay Using (1) Aroclor-induced Rat Liver, (2) Chicken Liver S9 and (3) The York Modification of the Standard Ames Protocol

  • Susan E. Riley
  • R. Colin Garner


The testing of four UKEMS trial compounds in the presence of Aroclor 1254-induced rat liver S9 using the standard Ames protocol showed that BZD and DAT induced mutation in S. typhimurium TA1538. A modification of the standard testing procedure known as the ‘York method’ demonstrated enhanced mutagenicity with BZD but not with DAT; Sample B of CDA was rendered a mutagen using this procedure. Optimum mutagenicity was seen with a final S9 concentration of 10%. Chicken liver S9 was less effective than rat in activating the two positive mutagens.


Chicken Liver Positive Mutagen Standard Testing Procedure Microsomal Activation Cancer Research Campaign 
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  1. Ames, B.N., McCann, J. and Yamasaki, E. (1975). Methods for detecting carcinogens and mutagens with the Salmonella/ mammalian-microsome mutagenicity test. Mutation Res. 31: 347–364PubMedCrossRefGoogle Scholar
  2. Ashby, J., Styles, J. and Callander, R.D. (1980). Comparative activity of 4,4′-diaminobiphenyl (benzidine) and its terphenyl analogue, 4,4″-diaminoterphenyl, in two in vitro assays for potential carcinogenicity. Carcinogenesis 1: 801–802PubMedCrossRefGoogle Scholar
  3. Booth, S.C., Welch, A.M. and Garner, R.C. (1980). Some factors affecting mutant numbers in the Salmonella/microsome assay. Carcinogenesis 1: 911–923PubMedCrossRefGoogle Scholar
  4. Garner, R.C, Walpole, A.L. and Rose, H.L. (1975). Testing of some benzidine analogues for microsomal activation to bacterial mutagens. Cancer Letters 1: 39–45PubMedCrossRefGoogle Scholar

Copyright information

© United Kingdom Environmental Mutagen Society 1985

Authors and Affiliations

  • Susan E. Riley
    • 1
  • R. Colin Garner
    • 2
  1. 1.Microtest Research LimitedUniversity RoadHeslingtonUK
  2. 2.Cancer Research UnitUniversity of YorkHeslington, YorkUK

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