Abstract：
:Quinocarmycin monicitrate (KW2152) and its analogue, DX-52-1, demonstrated specificity for melanomas in the National Cancer Institute in vitro human tumor cell line drug screen. In contrast to most cell lines, a 50% reduction in tumor cell burden (as measured protein) at the end of a 48-h drug incubation was produced in five of eight melanoma lines by KW2152 concentrations (LC50s) ranging from 0.49 to 10.93 microM and by DX-52-1 concentrations ranging from 0.71 to 7.33 microM. Using the COMPARE algorithm, the patterns of differential cytotoxicity for both agents at the LC50 level of effect most closely resembled those for actinomycin D, mithramycin, and Adriamycin. In in vivo studies, both KW2152 (40 mg/kg/day) and DX-52-1 (90 mg/kg/day) caused partial and complete regressions of staged s.c.-implanted LOX IMVI melanoma xenografts following i.p. administration on days 5, 9, and 13 and produced tumor growth delays of 231 and 181%, respectively (P < 0.001). Activity was augmented by more prolonged therapy. Statistically significant growth inhibition of SK-MEL-2, UACC-62, UACC-257, and M14, but not SK-MEL-5 and MALME-3M, melanoma xenografts also was observed following every fourth or seventh day i.p. treatments. Based on these findings, DX-52-1 has been selected by the National Cancer Institute for development to clinical trial especially against melanomas. This agent represents one of the first to be selected for preclinical development based on disease-panel specificity discovered in the National Cancer Institute cancer drug screen.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Plowman J,Dykes DJ,Narayanan VL,Abbott BJ,Saito H,Hirata T,Grever MRsubject
Has Abstractpub_date
1995-02-15 00:00:00pages
862-7issue
4eissn
0008-5472issn
1538-7445journal_volume
55pub_type
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