title: Genotoxic potential of an organophosphate insecticide, phosphamidon (dimecron): an in vivo study in mice.
abstract: The genotoxic effect of phosphamidon in mice in an in vivo test system was investigated by 3 different assays: chromosomal aberration, micronucleus and sperm-shape abnormality. The chemical was administered to groups of mice via 3 routes (i.p., p.o. and s.c.), acutely in 3 dose regimens (5, 4 and 3 mg/kg) and subacutely or chronically (5 X 1 mg/kg). The animals were sacrificed at different times: after 6, 24, 48 and 120 h for chromosomal aberration, 30 h for micronucleus and 35 days for sperm-shape abnormality. Significant effects were observed in all assays. Chronic exposure to fractionated doses induced less effect than the equivalent acute dose. The results were dose- as well as time-responsive and indicated the genetic peril of phosphamidon in the present, in vivo system.
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000187:drug effects; D002467:Cell Nucleus / Q000187:drug effects*; D002869:Chromosome Aberrations; D004305:Dose-Response Relationship, Drug; D007306:Insecticides / Q000633:toxicity*; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D010707:Phosphamidon / Q000633:toxicity*; D013094:Spermatozoa / Q000002:abnormalities / Q000187:drug effects*
chemical_list: D007306:Insecticides; D010707:Phosphamidon