MUTAGENICITY TESTS ON TMS-19-Q

DOI

Bibliographic Information

Other Title
  • 新マクロライド系抗生物質TMS-19-Qの変異原性

Abstract

Genetical toxicology tests on TMS-19-Q, a new macrolide antibiotic, were carried out by using microorganisms, cultured mammalian cells and small rodents.<BR>The effect of the drug on DNA damage and/or repair was examined according to the Rec-assay with Bacillus subtilis tester strains and to sister-chromatid exchange (SCE) test with cultured Chinese hamster cells.<BR>The results from these tests showed no remarkable difference in growth inhibition zones between the repair-deficient (M 45) and -proficient (H 17) tester strains, or no increase in SCE frequencies with increasing TMS-19-Q concentration; suggesting that the drug has no substantial effect on DNA damage and/or repair both in prokaryotes and eukaryotes.<BR>Further evidence for no mutagenicity of the drug was revealed by the result from the Ames microsome assay in which the drug had no effects on induction of reverse mutation.<BR>The cytogenetical effect of TMS-19-Q was examined in accordance with chromosomal aberration analysis in cultured Chinese hamster cells and with micronucleus test in mouse bone-marrow cells. Although an increase in centric fission of chromosome Nos. 10 and 11 was observed in cultured Chinese hamster cells when exposed to the drug in combination with S-9 mix., but the drug had no effect on induction of micronucleus in mice bone-marrow cells.<BR>All these results support the notion that TMS-19-Q per se is genetically safe drug.

Journal

  • CHEMOTHERAPY

    CHEMOTHERAPY 32 (Supplement6), 222-227, 1984

    Japanese Society of Chemotherapy

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