Chromosomal changes in cell lines from mouse tumors induced by nickel sulfide and methylcholanthrene.
Rhabdomyosarcomas were induced in mice by intramuscular injections of crystalline nickel sulfide and 3-methylcholanthrene. At early passage, karyotypes were performed by G-banding for four nickel sulfide cell lines and for three 3-methylcholanthrene cell lines. Six cell lines were near-diploid and one nickel sulfide line was near-tetraploid. Three of the nickel sulfide cell lines were characterized by a rearranged marker chromosome which was present in a majority of the cells of each line. The rearrangements leading to the formation of marker chromosomes were different in each nickel sulfide cell line but involved chromosome 4 in two of the nickel sulfide cell lines. Extra copies of chromosome 15 were present in two nickel sulfide cell lines. Possible rearrangement and/or gene activation was examined for the c-mos oncogene on chromosome 4 and the c-myc oncogene on chromosome 15, but no alteration or activation was observed. None of the 3-methylcholanthrene cell lines contained rearranged marker chromosomes; however, one MCA cell line did contain large numbers of double minutes. In all cell lines, minichromosomes (small atypical acrocentric chromosomes) were observed that contained distinct centromeric regions but no other G-positive bands.
Christie
N T
NT
Institute of Environmental Medicine, New York University Medical Center, New York 10987.
Tummolo
D M
DM
Biggart
N W
NW
Murphy
E C
EC
D000782:Aneuploidy; D000818:Animals; D015152:Blotting, Northern; D015139:Blotting, Southern; D015197:Carcinogenicity Tests; D002869:Chromosome Aberrations; D002871:Chromosome Banding; D005260:Female; D007621:Karyotyping; D008748:Methylcholanthrene / Q000633:toxicity*; D051379:Mice; D009532:Nickel / Q000633:toxicity*; D012208:Rhabdomyosarcoma / Q000139:chemically induced* / Q000235:genetics; D014407:Tumor Cells, Cultured
D008748:Methylcholanthrene; D009532:Nickel; C017558:nickel sulfide