Abstract
N-Acetylcysteine, known as a radical scavenger, was examined for its influence on the radiotolerance of progenitor cells of granulocytopoiesis. Added before and after irradiation in a dose of 2 mg/ml to suspension cultures of non-adherent low-density human bone marrow cells N-acetylcysteine (AcCys) clearly improved the survival. The D0 value of the survival curve for granulocyte/macrophage colony-forming cells increased by a factor of 1.56 as compared to non-treated control suspensions. The improvement of radiation tolerance is probably not only based on the radical scavenger properties (radioprotective component) of AcCys, but also on the support of repair processes.
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