title: Effect of antibiotics on the mutagenic activity induced by chemicals. I. Chromosome aberrations during spermatogenesis in mice.
abstract: Effect of antibiotics (rifampicin-RIF, puromycin-PU, chloramphenicol-CHF and cycloheximide-CYC) on the frequency of chromosomal abnormalities induced by TEPA [tris (1-aziridinyl) phosphine oxide] was studied by the cytogenetic analysis in mice during spermatogenesis. Males were given intraperitoneally a single dose of one of the following agents: TEPA 1 mg./kg. b.w., RIF 150 mg./kg. b.w., PU 100 mg./kg. b.w., CHF 500 mg./kg. b.w. and CYC 100 mg./kg. b.w., or a simultaneously administered TEPA and an antibiotic. Spermatocytes in the diakinesis/first metaphase stage and in spermatogonia. However, statistically insignificantly increased translocations in the group TEPA-CHF, univalents of X and Y chromosomes in TEPA-CHF, CYC and TEPA-CYC, and the increased frequency of metaphases with 19II + U and 20II + f were induced in the preleptotene stage. The decreased frequency of X and Y univalents in TEPA-RIF and TEPA-CHF was induced in spermatogonia. Results revealed a possible selective pressure against the cells carrying some abnormalities.
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002701:Chloramphenicol / Q000494:pharmacology; D002869:Chromosome Aberrations; D003513:Cycloheximide / Q000494:pharmacology; D008297:Male; D051379:Mice; D009154:Mutation / Q000187:drug effects*; D011691:Puromycin / Q000494:pharmacology; D012293:Rifampin / Q000494:pharmacology; D013091:Spermatogenesis / Q000187:drug effects*; D013094:Spermatozoa / Q000187:drug effects*; D014178:Translocation, Genetic; D013721:Triethylenephosphoramide
chemical_list: D000900:Anti-Bacterial Agents; D011691:Puromycin; D002701:Chloramphenicol; D003513:Cycloheximide; D013721:Triethylenephosphoramide; D012293:Rifampin