An in vitro assay for evaluating chemosensitivity of leukaemia cells: preclinical studies
Menconi, E.; Lepri, E.; Bonmassar, E.; Frati, L.; Barzi, A.
International Journal of Tissue Reactions 8(6): 485-492
1986
ISSN/ISBN: 0250-0868 PMID: 3793386 Document Number: 280829
The present study was aimed at defining the standard conditions for predictive chemosensitivity testing of human leukemias. The in vitro cytotoxic potential of 11 anticancer drugs against L1210 murine leukemia was comparatively determined 3 and 48 h after in vitro exposure of leukemia cells to these agents. In preliminary testing, drug-induced damage wasestimated in terms of percent inhibition of: tumor cell proliferation, by microscopic determination of viable cell numbers; and DNA synthesis, by measuring the extent of incorporation of the labelled nucleoside 125IUdR. Since the two tests appeared to yield comparable results, all subsequent experiments on the various murine tumours were performed using the radiolabel incorporation technique. The results obtained pointed out that this metabolic assay performed 48 hours after drug exposure appears to be capable of predicting both "spontaneous" and "induced" in vivo resistance of murine leukemias.