PMID: 6540142Sep 1, 1984Paper

Pharmacological and preclinical toxicological studies of 1,2-diaminocyclohexane(isocitrato)platinum(II)

Cancer Research
J P MacquetJ P Armand

Abstract

The antitumor activity of a new highly water-soluble platinum derivative, (1,2-diaminocyclohexane)(isocitrato)platinum(II) (NSC 350602; PHIC), was studied in L1210 leukemia cells inoculated into mice. PHIC was found to be active for i.p. graft-i.p. treatment, i.p. graft-i.v. treatment, and i.v. graft-p.o. treatment. A significant activity was observed on early and advanced L1210 leukemia even when the treatment was delayed 6 days after the graft. A comparison between the activities of PHIC, cisplatin (NSC 119875), and (4-carboxyphthalato)(1,2-diaminocyclohexane)-platinum(II) (NSC 271674; DACCP) for i.p. graft-i.p. treatment indicated that the highest activity was observed for divided doses rather than single dose in the case of PHIC and DACCP and not for cisplatin. Under these conditions, PHIC gave larger treated versus control survival time values or a greater number of surviving animals than did cisplatin and DACCP. No cross-resistance between PHIC and cisplatin could be detected in L1210 leukemia cells resistant to cisplatin. Mutagenicity studies on Salmonella typhimurium revealed that PHIC is far less mutagenic than cisplatin on TA100 and TA98 strains. Other pharmacological parameters, such as growth inhibition rate of cult...Continue Reading

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