No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE

In spite of extensive research, assessment of potential health risks associated with exposure to low-dose (≤ 0.1 Gy) radiation is still challenging. We evaluated the in vivo induction of genomic instability, expressed as late-occurring chromosome aberrations, in bonemarrow cells of two strains of mo...

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Main Authors: Kanokporn Noy Rithidech, Chatchanok Udomtanakunchai, Louise M. Honikel, Elbert B. Whorton
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/51461
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-514612018-09-04T06:13:25Z No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE Kanokporn Noy Rithidech Chatchanok Udomtanakunchai Louise M. Honikel Elbert B. Whorton Chemical Engineering Environmental Science Medicine Pharmacology, Toxicology and Pharmaceutics In spite of extensive research, assessment of potential health risks associated with exposure to low-dose (≤ 0.1 Gy) radiation is still challenging. We evaluated the in vivo induction of genomic instability, expressed as late-occurring chromosome aberrations, in bonemarrow cells of two strains of mouse with different genetic background, i.e. the radiosensitive BALB/cJ and the radioresistant C57BL/6J strains following a whole-body exposure to varying doses of 137Cs gamma rays (0, 0.05, 0.1, and 1.0 Gy). A total of five mice per dose per strain were sacrificed at various times post-irradiation up to 6 months for sample collections. Three-color fluorescence in situ hybridization for mouse chromosomes 1, 2, and 3 was used for the analysis of stable-aberrations in metaphase-cells. All other visible gross structural-abnormalities involving non-painted-chromosomes were also evaluated on the same metaphase-cells used for scoring the stable-aberrations of painted-chromosomes. Our new data demonstrated in bone-marrow cells from both strains that low doses of low LET-radiation (as low as 0.05 Gy) are incapable of inducing genomic instability but are capable of reducing specific aberration-types below the spontaneous rate with time postirradiation. However, the results showed the induction of genomic instability by 1.0 Gy of137Cs gamma rays in the radiosensitive strain only. © 2012 University of Massachusetts. 2018-09-04T06:02:12Z 2018-09-04T06:02:12Z 2012-04-02 Journal 15593258 2-s2.0-84859056820 10.2203/dose-response.11-002.Rithidech https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84859056820&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/51461
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Chemical Engineering
Environmental Science
Medicine
Pharmacology, Toxicology and Pharmaceutics
spellingShingle Chemical Engineering
Environmental Science
Medicine
Pharmacology, Toxicology and Pharmaceutics
Kanokporn Noy Rithidech
Chatchanok Udomtanakunchai
Louise M. Honikel
Elbert B. Whorton
No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE
description In spite of extensive research, assessment of potential health risks associated with exposure to low-dose (≤ 0.1 Gy) radiation is still challenging. We evaluated the in vivo induction of genomic instability, expressed as late-occurring chromosome aberrations, in bonemarrow cells of two strains of mouse with different genetic background, i.e. the radiosensitive BALB/cJ and the radioresistant C57BL/6J strains following a whole-body exposure to varying doses of 137Cs gamma rays (0, 0.05, 0.1, and 1.0 Gy). A total of five mice per dose per strain were sacrificed at various times post-irradiation up to 6 months for sample collections. Three-color fluorescence in situ hybridization for mouse chromosomes 1, 2, and 3 was used for the analysis of stable-aberrations in metaphase-cells. All other visible gross structural-abnormalities involving non-painted-chromosomes were also evaluated on the same metaphase-cells used for scoring the stable-aberrations of painted-chromosomes. Our new data demonstrated in bone-marrow cells from both strains that low doses of low LET-radiation (as low as 0.05 Gy) are incapable of inducing genomic instability but are capable of reducing specific aberration-types below the spontaneous rate with time postirradiation. However, the results showed the induction of genomic instability by 1.0 Gy of137Cs gamma rays in the radiosensitive strain only. © 2012 University of Massachusetts.
format Journal
author Kanokporn Noy Rithidech
Chatchanok Udomtanakunchai
Louise M. Honikel
Elbert B. Whorton
author_facet Kanokporn Noy Rithidech
Chatchanok Udomtanakunchai
Louise M. Honikel
Elbert B. Whorton
author_sort Kanokporn Noy Rithidech
title No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE
title_short No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE
title_full No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE
title_fullStr No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE
title_full_unstemmed No evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>Cs gamma rays in bone marrow cells of BALB/cJ and C57BL/6J MICE
title_sort no evidence for the in vivo induction of genomic instability by low doses of<sup>137</sup>cs gamma rays in bone marrow cells of balb/cj and c57bl/6j mice
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84859056820&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/51461
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