Influence of o-Phenanthroline on DNA Single-Strand Breaks, Alkali-Labile Sites, Glutathione Reductase, and Formation of Chromium(V) in Chinese-Hamster V-79 Cells Treated with Sodium Chromate(VI)

1993 ◽  
Vol 305 (2) ◽  
pp. 261-266 ◽  
Author(s):  
M. Sugiyama ◽  
K. Tsuzuki ◽  
N. Haramaki
1990 ◽  
Vol 11 (1) ◽  
pp. 37-41 ◽  
Author(s):  
Sylvia Görsdorf ◽  
Klaus E. Appel ◽  
Cindy Engeholm ◽  
Günter Obe

1987 ◽  
Vol 38 (1-2) ◽  
pp. 1-7 ◽  
Author(s):  
Masayasu Sugiyama ◽  
Akikazu Ando ◽  
Akihiro Furuno ◽  
N. Burr Furlong ◽  
Toshihiro Hidaka ◽  
...  

Genetics ◽  
1977 ◽  
Vol 87 (1) ◽  
pp. 129-138
Author(s):  
James E Cleaver

ABSTRACT Cultured Chinese hamster cells were labeled with 6-3H-thymidine or 5-methyl-3H-thymidine and allowed to accumulate damage from 3H decays for various periods of time while frozen. The frequencies of cells resistant to 6-thioguanine or ouabain and the amount of DNA damage (i.e., number of single-strand breaks) were determined and compared with the mutation frequencies resulting from X and ultraviolet light irradiation. Whereas 3H decays and X rays made only 6-thioguanine-resistant mutants, ultraviolet light made both 6-thioguanine- and ouabain-resistant mutants. 3H decays originating at the 6 position were two to three times as effective as decays at the 5-methyl position in making drug-resistant mutants, but decays at both sites were equally effective in making single-strand breaks. Mutants and strand breaks produced by beta irradiation of the nucleus probably are the same irrespective of the site of the decay in thymine; these results indicate that the local transmutation effects of 3H decay produce more mutations when they occur at the 6 position than at the 5-methyl position.


1995 ◽  
Vol 346 (4) ◽  
pp. 247-253 ◽  
Author(s):  
Shunji Ueno ◽  
Masayasu Sugiyama ◽  
Nobuyuki Susa ◽  
Yoshinori Furukawa

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