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Cell Growth & Differentiation, Vol 3, Issue 4 217-223, Copyright © 1992 by American Association of Cancer Research

ARTICLES

Gene-specific DNA interstrand cross-links produced by nitrogen mustard in the human tumor cell line Colo320HSR

BW Futscher, RO Pieper, WS Dalton and LC Erickson
Department of Pharmacology, Stritch School of Medicine, Loyola University Chicago, Maywood, Illinois 60153.

Genomic and gene-specific DNA interstrand cross-links produced by nitrogen mustard (HN2) were measured in the human tumor cell line Colo320HSR. Following exposures that produced greater than or equal to 1 log cell kill, it was found that HN2-induced DNA interstrand cross-links were produced and processed in a heterogeneous fashion within the genome. Cross-links were detected in the amplified, overexpressed c-myc oncogene, whereas in the weakly expressed N-ras gene and the nontranscribed, high copy number alpha-satellite sequence (of chromosome 20), cross-links were not detected. The cross-links in the c-myc oncogene disappeared more rapidly than total genomic cross-links. These results suggest that HN2-induced DNA interstrand cross-links are produced and processed in the genome in a nonrandom fashion.


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[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Cancer Research Clinical Cancer Research
Cancer Epidemiology Biomarkers & Prevention Molecular Cancer Therapeutics
Molecular Cancer Research Cell Growth & Differentiation
Copyright © 1992 by the American Association of Cancer Research.