title: The effects of exposure to different clastogens on the pattern of chromosomal aberrations detected by FISH whole chromosome painting in occupationally exposed individuals.
abstract: The pattern of chromosomal aberrations (CA) was studied by fluorescence in situ hybridization (FISH) technique (whole chromosomes #1 and #4 painting) in workers occupationally exposed to any of the four following conditions: acrylonitrile (ACN), ethyl benzene (EB), carcinogenic polycyclic aromatic hydrocarbons (c-PAHs), and irradiation in nuclear power plants (NPP), respectively. Decrease in the relative frequency of translocations was observed in EB group, and an increase in reciprocal translocations in ACN and NPP-exposed groups. An increase in a relative number of insertions was registered under all four conditions (significant at ACN, EB, c-PAHs, quasisignificant at NPP-exposed groups). Significant differences in the percentage of lymphocytes with aberrations on chromosome #1 (58.8+/-32.7%, versus 73.8+/-33.6% in the controls, P < 0.05), and chromosome #4 (47.0+/-34.1%, versus 29.4+/-32.2%, P < 0.01) were found in workers exposed to ACN. Similarly, a decrease in the proportion of cells with aberration on chromosome #1 (61.0+/-24.0%, versus 73.8+/-33.6%, P < 0.05) and an increase on chromosome #4 (45.6+/-24.6%, versus 29.4+/-32.2%, P < 0.05) were observed in workers exposed to EB. Frequency of aberrant cells (%AB.C.) as well as genomic frequency of translocations (F(G)/100) increased with age (P < 0.001). Aging also increased the percentage of translocations and reciprocal translocations (P < 0.05), but decreased the relative number of acentric fragments (P < 0.01). Smoking led to significantly increased F(G)/100 (P < 0.05), but did not affect the pattern of chromosomal aberrations. Our results seem to indicate that different carcinogens may induce a different pattern of chromosomal aberrations.
authors.affiliation: Institute of Experimental Medicine AS CR and Health Institute of Central Bohemia, Vídenská 1083, 142 20 Prague 4, Czech Republic.
authors.forename: O
authors.initials: O
authors.lastname: Beskid
authors.forename: Z
authors.initials: Z
authors.lastname: Dusek
authors.forename: I
authors.initials: I
authors.lastname: Solanský
authors.forename: R J
authors.initials: RJ
authors.lastname: Srám
mesh_terms: D000181:Acrylonitrile / Q000633:toxicity; D000328:Adult; D001555:Benzene Derivatives / Q000633:toxicity; D002478:Cells, Cultured; D002869:Chromosome Aberrations / Q000139:chemically induced*; D020223:Chromosome Painting; D006801:Humans; D008214:Lymphocytes / Q000187:drug effects / Q000528:radiation effects; D008297:Male; D009153:Mutagens / Q000633:toxicity*; D016273:Occupational Exposure / Q000009:adverse effects*; D011084:Polycyclic Aromatic Hydrocarbons / Q000633:toxicity; D011839:Radiation, Ionizing; D012044:Regression Analysis; D012907:Smoking / Q000009:adverse effects
chemical_list: D001555:Benzene Derivatives; D009153:Mutagens; D011084:Polycyclic Aromatic Hydrocarbons; C004912:ethylbenzene; D000181:Acrylonitrile