Abstract:
:Fluorescence in situ hybridization with whole chromosome libraries, also known as chromosome "painting", is an easy and rapid method for detection of chromosome aberrations. To evaluate the sensitivity of this in radiation dosimetry we have made comparisons with G-banding analysis and also with physicochemical measurements of radiation induced DNA damage (DNA strand breaks and 8-hydroxydeoxyguanosine formation). Heparinised human blood was irradiated at room temperature with a range (0-10 Gy) of gamma irradiation from a cobalt 60 source. Chromosome spreads prepared from phytohaemagglutinin stimulated "whole blood" lymphocyte cultures were hybridized in situ with the whole chromosome 1 library, coded, and scored for aberrant cells. Dose response curves plotted as percent abnormal cells obtained by the two cytogenetic methods were similar and it would appear that chromosome "painting" compared favourably with G-banding for the detection of aberrations. The measurement of DNA strand breaks by a fluorimetric alkaline unwinding assay showed similar sensitivity to chromosome "painting" whereas the formation of 8-hydroxydeoxyguanosine did not correlate with aberration frequencies.
journal_name
Hereditasjournal_title
Hereditasauthors
Plummer SM,Pheasant AE,Johnson R,Faux SP,Chipman JK,Hultén MAdoi
10.1111/j.1601-5223.1994.00139.xsubject
Has Abstractpub_date
1994-01-01 00:00:00pages
139-45issue
2eissn
0018-0661issn
1601-5223journal_volume
121pub_type
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