Abstract
Assays that measure DNA damage and repair are critical in evaluating the extent to which therapeutic agents damage DNA and in identifying whether DNA repair can limit the toxicity of chemotherapy. The COMET assays described in this guide should help readers evaluate single and double-strand breaks cause by chemotherapeutic agents and also monitor the ability of the cells to repair such damage. The EJDR assay described is a valuable tool to assess the ability of drugs and DNA repair proteins to modulate DNA repair capacity. Finally, the immunofluorescence assay described should allow accurate assessments of DNA damage and the kinetics of repair as measured by Ɣ-H2AX foci. This procedure can also be used to mechanistically investigate the recruitment of specific DNA damage and repair proteins in CLL cells.
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