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The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair.
The effect(s) of the radioprotector 2-[(aminopropyl)amino] ethanethiol (WR 1065) on fission-neutron-induced DNA damage and repair in V79 Chinese hamster cells was determined by using a neutral filter elution procedure (pH 7.2). When required, WR1065, at a final working concentration of 4 mM, was add...
Autores principales: | , , , |
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Formato: | Texto |
Lenguaje: | English |
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Nature Publishing Group
1989
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2246967/ https://www.ncbi.nlm.nih.gov/pubmed/2667608 |
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author | Grdina, D. J. Sigdestad, C. P. Dale, P. J. Perrin, J. M. |
author_facet | Grdina, D. J. Sigdestad, C. P. Dale, P. J. Perrin, J. M. |
author_sort | Grdina, D. J. |
collection | PubMed |
description | The effect(s) of the radioprotector 2-[(aminopropyl)amino] ethanethiol (WR 1065) on fission-neutron-induced DNA damage and repair in V79 Chinese hamster cells was determined by using a neutral filter elution procedure (pH 7.2). When required, WR1065, at a final working concentration of 4 mM, was added to the culture medium, either 30 min before and during irradiation with fission spectrum neutrons (beam energy of 0.85 MeV) from the JANUS research reactor, or for selected intervals of time following exposure. The frequency of neutron-induced DNA strand breaks as measured by neutral elution as a function of dose equalled that observed for 60Co gamma-ray-induced damage (relative biological effectiveness of one). In contrast to the protective effect exhibited by WR1065 in reducing 60Co-induced DNA damage, WR1065 was ineffective in reducing or protecting against induction of DNA strand breaks by JANUS neutrons. The kinetics of DNA double-strand rejoining were measured following neutron irradiation. In the absence of WR1065, considerable DNA degradation by cellular enzymes was observed. This process was inhibited when WR1065 was present. These results indicate that, under the conditions used, the quality (i.e. nature), rather than quantity, of DNA lesions (measured by neutral elution) formed by neutrons was significantly different from that formed by gamma-rays. |
format | Text |
id | pubmed-2246967 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1989 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-22469672009-09-10 The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair. Grdina, D. J. Sigdestad, C. P. Dale, P. J. Perrin, J. M. Br J Cancer Research Article The effect(s) of the radioprotector 2-[(aminopropyl)amino] ethanethiol (WR 1065) on fission-neutron-induced DNA damage and repair in V79 Chinese hamster cells was determined by using a neutral filter elution procedure (pH 7.2). When required, WR1065, at a final working concentration of 4 mM, was added to the culture medium, either 30 min before and during irradiation with fission spectrum neutrons (beam energy of 0.85 MeV) from the JANUS research reactor, or for selected intervals of time following exposure. The frequency of neutron-induced DNA strand breaks as measured by neutral elution as a function of dose equalled that observed for 60Co gamma-ray-induced damage (relative biological effectiveness of one). In contrast to the protective effect exhibited by WR1065 in reducing 60Co-induced DNA damage, WR1065 was ineffective in reducing or protecting against induction of DNA strand breaks by JANUS neutrons. The kinetics of DNA double-strand rejoining were measured following neutron irradiation. In the absence of WR1065, considerable DNA degradation by cellular enzymes was observed. This process was inhibited when WR1065 was present. These results indicate that, under the conditions used, the quality (i.e. nature), rather than quantity, of DNA lesions (measured by neutral elution) formed by neutrons was significantly different from that formed by gamma-rays. Nature Publishing Group 1989-01 /pmc/articles/PMC2246967/ /pubmed/2667608 Text en https://creativecommons.org/licenses/by/4.0/This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Research Article Grdina, D. J. Sigdestad, C. P. Dale, P. J. Perrin, J. M. The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair. |
title | The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair. |
title_full | The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair. |
title_fullStr | The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair. |
title_full_unstemmed | The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair. |
title_short | The effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced DNA damage and repair. |
title_sort | effect of 2-[(aminopropyl)amino] ethanethiol on fission-neutron-induced dna damage and repair. |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2246967/ https://www.ncbi.nlm.nih.gov/pubmed/2667608 |
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