An in vitro chemosensitivity test is described for the quantitative determination of the interference of antitumoral drugs on nucleic acid metabolism in short-term cultures of non-Hodgkin's malignant lymphomas. Preliminary biochemical studies have defined the optimal culture conditions and have guaranteed the reliability and the reproducibility of the test. Our results for adriamycin and prednisone are in agreement with those obtained on experimental systems with other techniques.
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