Abstract

Evaluation of the effectiveness of small molecule radiation protectors and mitigators requires in vitro assays for clonogenic survival and analyses of drug effects on apoptosis and DNA damage repair. Application of novel mitigators for potential use in normal tissue protection during clinical radiation therapy and radiation counter terrorism mandates animal testing which, in the LD 50/30 assay for the effects of TBI on the hematopoietic syndrome, involves significant expense. We tested the hypothesis that early evaluation of candidate drugs in human cord blood clonogenic assay could potentially identify drugs which, while effective in the murine system, might be ineffective in humans.

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