title: Mouse dominant lethal and sperm abnormality studies with combined exposure to X-rays and mitomycin C.
abstract: The induction of dominant lethal effects and sperm abnormalities in Pzh:Swiss male mice after treatments with X-rays and mitomycin C (MMC) was investigated. Combinations of high (1.00 Gy + 5.25 mg/kg bw MMC) and low (0.25 Gy + 1.75 mg/kg bw MMC) doses of both agents were used. Exposure to high doses of X-rays + MMC induced an increased rate of dominant lethal mutations in spermatogonia and late spermatocytes. Combined treatment with low doses of X-rays and MMC was not mutagenic in any stage of spermatogenesis. MMC increased the frequency of abnormal spermatozoa after exposure alone and in combination with X-rays. Treatment with two high doses (1.00 Gy + 5.25 mg/kg bw MMC) induced 58.4% abnormal spermatozoa. After combined exposure to low doses of both agents 35.7% spermatozoa with malformations were observed.
authors.affiliation: Department of Radiation Protection and Radiobiology, National Institute of Hygiene, Warsaw, Poland.
authors.forename: M M
authors.initials: MM
authors.lastname: Dobrzyńska
authors.forename: A K
authors.initials: AK
authors.lastname: Gajewski
mesh_terms: D000818:Animals; D008297:Male; D051379:Mice; D016685:Mitomycin / Q000009:adverse effects*; D009152:Mutagenicity Tests; D009154:Mutation; D013094:Spermatozoa / Q000002:abnormalities / Q000187:drug effects* / Q000528:radiation effects*; D014965:X-Rays / Q000009:adverse effects*
chemical_list: D016685:Mitomycin