Abstract
Chinese hamster, HeLa and HAK cells were treated with methotrexate (MTX) to determine the dependence of its effect on drug concentration and exposure time. With a broad range of survival curves for Chinese hamster cells, cell survival is an exponential function of exposure time and a power function of drug concentration. The data allow a mathematical description to be made of the interdependence of MTX concentration and drug exposure in relation to cell survival.
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