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Translocation Frequencies Measured in Patients One Year after Radioactive Iodine Therapy for Thyrotoxicosis
Lambert, Vincent; Thierens, H.; Monsieurs, M. et al.
2001In International Journal of Radiation Biology, 77 (6), p. 679-85
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Abstract :
[en] PURPOSE: To investigate the incidence of translocations induced by iodine-131 therapy in thyrotoxicosis patients 1 year after the administration of the radiolabelled compound. MATERIALS AND METHODS: Tricolour FISH with whole-chromosome-specific probes for chromosomes 2, 4 and 8 was used for scoring translocations. From the genomic translocation frequencies, derived using the Lucas formula, equivalent whole-body doses were calculated, based on the in vitro (60)Co gamma-ray dose-response curve. RESULTS: A total of 101 translocations were observed in 4864 metaphases, 63% being of the two-way type. In the control group used for obtaining dose-response data, nine translocations were observed in 5278 metaphases, 55% being two-way translocations. No correlation was found between the observed frequency of translocations and administered radioactivity. Using the in vitro dose-response, an estimated average dose for the group of nine patients of 0.79 +/- 0.22Gy was obtained. Compared with frequencies following the assumption that the involvement of a particular chromosome in a two-break exchange-type aberration is proportional to its DNA content, chromosome 4 was more frequently involved and chromosomes 2 and 8 less frequently involved in chromosomal rearrangements. CONCLUSION: This study shows that (131)I therapy for thyrotoxicosis patients induced translocations, especially in chromosome 4, which could be detected 1 year after the administration of the radiolabelled compound.
Disciplines :
General & internal medicine
Author, co-author :
Lambert, Vincent  ;  Centre Hospitalier Universitaire de Liège - CHU > Ophtalmologie
Thierens, H.
Monsieurs, M.
Roncancio, C.
Laurent, C.
Language :
English
Title :
Translocation Frequencies Measured in Patients One Year after Radioactive Iodine Therapy for Thyrotoxicosis
Publication date :
June 2001
Journal title :
International Journal of Radiation Biology
ISSN :
0955-3002
eISSN :
1362-3095
Publisher :
Taylor & Francis, United Kingdom
Volume :
77
Issue :
6
Pages :
679-85
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 January 2009

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