Induction of Chromosome Aberrations and Sister Chromatid Exchanges by X Rays in Density-Inhibited Cultures of Mouse 10T 1/2 Cells

1981 ◽  
Vol 87 (3) ◽  
pp. 538 ◽  
Author(s):  
Hatsumi Nagasawa ◽  
John B. Little
Keyword(s):  
Sister Chromatid ◽  
Chromosome Aberrations ◽  
Sister Chromatid Exchanges ◽  
X Rays ◽  
Chromatid Exchanges

scholarly journals Sister chromatid exchanges and structural chromosome aberrations in relation to smoking in 91 individuals

Hereditas ◽  
2008 ◽  
Vol 98 (1) ◽  
pp. 77-81 ◽  
Author(s):  
K. HEDNER ◽  
B. HÖGSTEDT ◽  
A.-M. KOLNIG ◽  
E. MARK-VENDEL ◽  
B. STRÖMBECK ◽  
...  
Keyword(s):  
Sister Chromatid ◽  
Chromosome Aberrations ◽  
Sister Chromatid Exchanges ◽  
Structural Chromosome ◽  
Chromatid Exchanges

Qualitative Evaluation of Sister Chromatid Exchanges Elicited by Combinations of Genotoxic Compounds Using Response Surface Methodology

1988 ◽  
Vol 7 (7) ◽  
pp. 975-986
Author(s):  
Richard P. Solana ◽  
Walter H. Carter ◽  
John D. Wilson ◽  
Vernon M. Chinchilli ◽  
Richard A. Carchman
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Sister Chromatid ◽  
Sister Chromatid Exchanges ◽  
X Rays ◽  
Response Curves ◽  
Additive Interaction ◽  
Underlying Assumption ◽  
X Ray ◽  
Chromatid Exchanges

Response surface methodology (RSM), a collection of statistical and mathematical techniques, can empirically model multiple agent interactions. The use of RSM allows modeling of the interaction at all levels of each agent, rather than focusing on a single level of effect, thereby describing the changing interaction present. Further, this technique allows qualitative analysis of the resultant model of the combination exposure for existing interactions. RSM was used in the statistical analysis of sister chromatid exchanges (SCE) elicited by combination exposures of genotoxic agents, ethylnitrosourea (ENU) with cis-diaminedichloroplatinum (II) (DDP), and DDP with x-rays. ENU and DDP each exhibited curvilinear concentration-related increases in SCEs. X-ray exhibited a linear increase in SCEs. For the DDP-x-ray combination, RSM analysis indicates a less-than-additive interaction, suggested by the nonparallel concentration-response curves of one agent at varying concentrations of the other. For the DDP-ENU combination, an increasingly less-than-additive interaction was detected. This descriptive ability is shown to be useful in suggesting hypotheses about mechanisms of action. Employing a polynomial model assumes effect-addition as an underlying assumption of additivity. Models with other underlying assumptions of additivity also can be used.

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