Journal
CANCER LETTERS
Volume 229, Issue 2, Pages 171-179Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.canlet.2005.07.016
Keywords
gamma H2AX; double strand break; replication arrest; environmental factors
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H2AX is a histone variant that is systematically found and ubiquitously distributed throughout the genome. Since it has been reported that DNA double-strand breaks (DSBs) induce phosphorylation of H2AX at serine 139 (gamma H2AX), an immunocytochemical assay with antibodies recognizing gamma H2AX has become the gold standard for the detection of DSBs. This assay is quite sensitive and is a specific indicator for the existence of a DSB. Until now, it has been reported that various kinds of physical, chemical, and biological factors induce the formation of the gamma H2AX foci detected using this assay. Even when gamma H2AX foci were detected, it was not always possible to conclude that the detected DSBs were produced by environmental stresses in the absence of any known radiation. In this review, emphasis is on discussing whether gamma H2AX foci formation depends on the formation of DSBs. (c) 2005 Elsevier Ireland Ltd. All rights reserved.
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