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pubmed-article:2023993pubmed:dateCreated1991-6-6lld:pubmed
pubmed-article:2023993pubmed:abstractTextThe radioprotector WR-1065 (2-[(aminopropyl)amino]ethanethiol) is known to protect mammalian cells from the cytotoxic and mutagenic effects of radio- and chemotherapeutic agents, but the exact mechanisms involved in this protection are not fully known. To help determine the effects of WR-1065 alone on cells, we examined its effect on a variety of cellular processes. Incubation of AA8 cells in 4 mM WR-1065 did not significantly affect the rate of DNA synthesis. Autoradiographic analysis of heavily labeled (S-phase population) nuclei of AA8 cells showed no significant difference in the S-phase population of WR-1065-treated versus control cells for up to 3 h. An examination of the effect of WR-1065 on repair synthesis, as measured by unscheduled DNA synthesis (UDS) in cells exposed to 15 Gy, showed no difference between treated and sham-treated cells for up to 2 h exposure. A significant reduction in the amount of UDS was seen in cells treated with the protector for 2.5 and 3 h. Incubation of cells in WR-1065 did alter the cell cycle distributions. An increase in the G2-phase population with a corresponding decrease in the G1-phase population was observed in cells incubated up to 3 h in the presence of 4 mM WR-1065. After the removal of WR-1065 at 3 h, a redistribution of the cells throughout the cell cycle occurred as has been observed in cells treated with other synchronization agents. These data suggest that perturbations in cell cycle progression, rather than direct effects on the rate of DNA synthesis, could play a role in the increased survival and reduced mutation frequencies observed in the presence of WR-1065.lld:pubmed
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pubmed-article:2023993pubmed:monthMaylld:pubmed
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pubmed-article:2023993pubmed:authorpubmed-author:GrdinaD JDJlld:pubmed
pubmed-article:2023993pubmed:authorpubmed-author:MeechanP JPJlld:pubmed
pubmed-article:2023993pubmed:authorpubmed-author:MurleyJ SJSlld:pubmed
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pubmed-article:2023993pubmed:volume126lld:pubmed
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pubmed-article:2023993pubmed:pagination223-8lld:pubmed
pubmed-article:2023993pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:2023993pubmed:articleTitleAccumulation of CHO cells in G2 phase following exposure to WR-1065.lld:pubmed
pubmed-article:2023993pubmed:affiliationDepartment of Biological Sciences, Northern Illinois University, DeKalb 60115.lld:pubmed
pubmed-article:2023993pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:2023993pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
pubmed-article:2023993pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
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