Differential sensitivity of a mouse myeloid leukemia cell line and normal mouse bone marrow cells to X-ray-induced chromosome aberrations

Journal Article · Fri Nov 01 04:00:00 EST 1985 · Cancer Res.; (United States)

OSTI ID:6040552

Aardema, M J; Au, W W; Hand, Jr, R E; Preston, R J

Cell line ML-1 was established from a myelogenous leukemia of an RFM mouse. The ML-1 cells and in vitro normal mouse bone marrow cells were analyzed to determine if there was a differential sensitivity to X-ray-induced chromosome aberrations in G1 cells and/or differences in postirradiation cell cycle progression. Cells identified as being in G1 at the time of irradiation by their staining pattern after replication in 5-bromodeoxyuridine were analyzed for all types of chromosomal aberrations following X-ray doses of 0.5, 1.0, 1.5, and 2.0 Gy. ML-1 cells showed a greater sensitivity to the induction of both chromosome-type aberrations and chromatid-type aberrations compared to normal mouse bone marrow cells, which only contained chromosome-type aberrations. The presence of chromatid-type aberrations in the ML-1 cells and not normal bone marrow cells suggested a differential progression through the cell cycle for the two cell types after irradiation. Mitotic index and flow cytometric analyses were performed and showed that both cell types have a delay in progression from G2 into mitosis, but only the normal mouse bone marrow cells have a delay in progression from G1 into S, as well as delayed progression through the S phase following X-irradiation. These results indicate that the ML-1 leukemia cells have an increased radiosensitivity. These same characteristics have been observed in ataxia telangiectasia cells and may well represent a general feature of cells with increased radiosensitivity.

• Research Organization: Univ. of Tennessee-Oak Ridge Graduate School of Biomedical Sciences
• OSTI ID: 6040552
• Journal Information: Cancer Res.; (United States), Journal Name: Cancer Res.; (United States); ISSN CNREA
• Country of Publication: United States
• Language: English

Related Subjects

560121* -- Radiation Effects on Cells-- External Source-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ANIMAL CELLS
ANIMALS
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
BONE MARROW CELLS
CELL CYCLE
CELL FLOW SYSTEMS
CHROMOSOMAL ABERRATIONS
CONNECTIVE TISSUE CELLS
DNA
GENETIC EFFECTS
GENETIC RADIATION EFFECTS
MAMMALS
MICE
MITOTIC INDEX
MUTATIONS
NUCLEIC ACIDS
ORGANIC COMPOUNDS
RADIATION EFFECTS
RADIOINDUCTION
RADIOSENSITIVITY
RODENTS
SOMATIC CELLS
TUMOR CELLS
VERTEBRATES