TY - JOUR
T1 - DNA-proportional distribution of radiation-induced chromosome aberrations analysed by fluorescence in situ hybridization painting of all chromosomes of a human female karyotype
AU - Barquinero Estruch, Joan Francesc
AU - Barquinero, J.F.
AU - Knehr, S.
AU - Braselmann, H.
AU - Figel, M.
AU - Bauchinger, M.
PY - 1998/9/8
Y1 - 1998/9/8
N2 - Purpose: This is the extension of a previous study, showing deviations from a DNA-proportional involvement of 12 single chromosomes (1-4, 6-10, 12, 14 and X) in radiation-induced translocations and dicentrics measured by FISH-painting and classified by standard cytogenetic scoring criteria. By adding data on chromosomes 2, 4, 5, 9, 11-13, 15-22 and X the analysis now comprises all chromosomes of a human female karyotype evaluated with three nomenclature systems (PAINT, S and S and a conventional method). Material and methods: Metaphase spreads were prepared from lymphocytes irradiated with 3 Gy 220 kV X-rays. FISH painting was performed with single chromosome-specific probes in combination with a pancentromeric probe. Results: Deviations from a DNA-proportional distribution became apparent for all aberration parameters analysed with the three nomenclature systems. Chromosomes 2, 3 and 6 were less frequently involved and chromosomes 16, 17 and 20 were more frequently involved in exchange aberrations. Generally, smaller chromosomes (15-22, with the exception of chromosome 19) were more frequently involved in aberration formation than expected. Conclusion: The assumption that the probability of a chromosome being involved in an exchange aberration is proportional to its DNA content is not supported by the present data.
AB - Purpose: This is the extension of a previous study, showing deviations from a DNA-proportional involvement of 12 single chromosomes (1-4, 6-10, 12, 14 and X) in radiation-induced translocations and dicentrics measured by FISH-painting and classified by standard cytogenetic scoring criteria. By adding data on chromosomes 2, 4, 5, 9, 11-13, 15-22 and X the analysis now comprises all chromosomes of a human female karyotype evaluated with three nomenclature systems (PAINT, S and S and a conventional method). Material and methods: Metaphase spreads were prepared from lymphocytes irradiated with 3 Gy 220 kV X-rays. FISH painting was performed with single chromosome-specific probes in combination with a pancentromeric probe. Results: Deviations from a DNA-proportional distribution became apparent for all aberration parameters analysed with the three nomenclature systems. Chromosomes 2, 3 and 6 were less frequently involved and chromosomes 16, 17 and 20 were more frequently involved in exchange aberrations. Generally, smaller chromosomes (15-22, with the exception of chromosome 19) were more frequently involved in aberration formation than expected. Conclusion: The assumption that the probability of a chromosome being involved in an exchange aberration is proportional to its DNA content is not supported by the present data.
M3 - Article
SN - 0955-3002
VL - 74
SP - 315
EP - 323
JO - International Journal of Radiation Biology
JF - International Journal of Radiation Biology
IS - 3
ER -