TY - JOUR
T1 - Rapid detection of radiation-induced chromosomal aberrations in lymphocytes and hematopoietic progenitor cells by mFISH
AU - Greulich, K. M.
AU - Kreja, L.
AU - Heinze, B.
AU - Rhein, A. P.
AU - Weier, H. U.G.
AU - Brückner, M.
AU - Fuchs, P.
AU - Molls, M.
N1 - Funding Information:
This work was supported by the Bundesministerium für Verteidigung, FRG (FV: INSAN I 0697V-3800), by the Commission of the European Communities and by the Ministry for Environment, Nature Conservation and Nuclear Safety, FRG. Partial support of H.-U.G. Weier was provided by the US Army Medical Corps, US Department of Defense, under contract number BC990107 with the E.O. Lawrence Berkeley National Laboratory. We thank Prof. Dr. med. R.U. Peter, Department of Dermatology, University Clinic, Ulm, for providing peripheral blood samples. Furthermore, we acknowledge the help of J. Bode with this paper.
PY - 2000/7/20
Y1 - 2000/7/20
N2 - Structural chromosome aberrations (SCAs) are sensitive indicators of a preceding exposure of the hematopoietic system to ionizing radiation. Cytogenetic investigations have therefore become routine tools for an assessment of absorbed radiation doses and their biological effects after occupational exposure or radiation accidents.Due to its speed and ease of use, fluorescence in situ hybridization (FISH) with whole chromosome painting (WCP) probes has become a method of choice to visualize SCAs. Until recently, this technique was limited to a rather small number of chromosomes, which could be tested simultaneously. As a result, only a fraction of the structural aberrations present in a sample could be detected and the overall dose effect had to be calculated by extrapolation. The recent introduction of two genome-wide screening techniques in tumor research, i.e., Spectral Karyotyping (SKY) and multicolor FISH (mFISH) now allows the detection of translocations involving any two non-homologous chromosomes.The present study was prompted by our desire to bring the power of mFISH to bear for the rapid identification of radiation-induced SCAs. We chose two model systems to investigate the utility of mFISH: lymphocytes that were exposed in vitro to 3 Gy photons and single hematopoietic progenitor cell colonies isolated from a Chernobyl victim 9 years after in vivo exposure to 5.4 Sv.In lymphocytes, we found up to 15 different chromosomes involved in rearrangements indicating complex radiation effects. Stable aberrations detected in hematopoietic cell colonies, on the other hand, showed involvement of up to three different chromosomes. These results demonstrated that mFISH is a rapid and powerful approach to detect and characterize radiation-induced SCAs in the hemopoietic system. The application of mFISH is expected to result in a more detailed and, thus, more informative picture of radiation effects. Eventually, this technique will allow researchers to rapidly delineate chromosomal breakpoints and facilitate the identification of the genes involved in radiation tumorigenesis. Copyright (C) 2000.
AB - Structural chromosome aberrations (SCAs) are sensitive indicators of a preceding exposure of the hematopoietic system to ionizing radiation. Cytogenetic investigations have therefore become routine tools for an assessment of absorbed radiation doses and their biological effects after occupational exposure or radiation accidents.Due to its speed and ease of use, fluorescence in situ hybridization (FISH) with whole chromosome painting (WCP) probes has become a method of choice to visualize SCAs. Until recently, this technique was limited to a rather small number of chromosomes, which could be tested simultaneously. As a result, only a fraction of the structural aberrations present in a sample could be detected and the overall dose effect had to be calculated by extrapolation. The recent introduction of two genome-wide screening techniques in tumor research, i.e., Spectral Karyotyping (SKY) and multicolor FISH (mFISH) now allows the detection of translocations involving any two non-homologous chromosomes.The present study was prompted by our desire to bring the power of mFISH to bear for the rapid identification of radiation-induced SCAs. We chose two model systems to investigate the utility of mFISH: lymphocytes that were exposed in vitro to 3 Gy photons and single hematopoietic progenitor cell colonies isolated from a Chernobyl victim 9 years after in vivo exposure to 5.4 Sv.In lymphocytes, we found up to 15 different chromosomes involved in rearrangements indicating complex radiation effects. Stable aberrations detected in hematopoietic cell colonies, on the other hand, showed involvement of up to three different chromosomes. These results demonstrated that mFISH is a rapid and powerful approach to detect and characterize radiation-induced SCAs in the hemopoietic system. The application of mFISH is expected to result in a more detailed and, thus, more informative picture of radiation effects. Eventually, this technique will allow researchers to rapidly delineate chromosomal breakpoints and facilitate the identification of the genes involved in radiation tumorigenesis. Copyright (C) 2000.
KW - Chernobyl accident
KW - Chromosome aberrations
KW - Hematopoietic system
KW - Radiation
KW - Stem cells
KW - mFISH
UR - http://www.scopus.com/inward/record.url?scp=0034691684&partnerID=8YFLogxK
U2 - 10.1016/S0027-5107(00)00057-9
DO - 10.1016/S0027-5107(00)00057-9
M3 - Article
C2 - 10894893
AN - SCOPUS:0034691684
SN - 0027-5107
VL - 452
SP - 73
EP - 81
JO - Mutation Research Regular Papers
JF - Mutation Research Regular Papers
IS - 1
ER -