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Overcoming of vincristine resistance in P388 leukemia in vivo and in vitro through enhanced cytotoxicity of vincristine and vinblastine by verapamil.
VCR resistance was almost completely overcome in vivo and in vitro and could be explained by the effective accumulation of VCR by verapamil in P388/VCR cells mediated by the inhibition of a VCR efflux function of the cells, a mechanism which remains to be solved. Expand
Increased accumulation of vincristine and adriamycin in drug-resistant P388 tumor cells following incubation with calcium antagonists and calmodulin inhibitors.
The high intracellular drug accumulation was directly related to the enhancement of the cytotoxicity of the antitumor agents, and the vincristine and Adriamycin resistance in these cells was circumvented. Expand
Circumvention of vincristine and Adriamycin resistance in vitro and in vivo by calcium influx blockers.
Calcium influx blockers, which possess coronary vasodilator activity, greatly enhanced the cytotoxicity of vincristine (VCR) in tumor cells and especially in VCR-resistant sublines of P388 leukemia (P388/V CR) and human K562 myelogenous leukemia. Expand
Rhizoxin, a macrocyclic lactone antibiotic, as a new antitumor agent against human and murine tumor cells and their vincristine-resistant sublines.
Rhizoxin, isolated from a plant pathogenic fungus which causes rice seedling blight, inhibits the mitosis of the tumor cells in a manner similar to that of Vinca alkaloids as revealed by… Expand
Antitumor activity of new anthracycline antibiotics, aclacinomycin-A and its analogs, and their toxicity.
New anthracycline antibiotics have been isolated from the culture of Streptomyces galilaeus MA144-M1 and aclacinomycin-A showed the strongest activity in inhibiting leukemia L-1210 and had lower toxicity than others. Expand
Potentiation of vincristine and Adriamycin effects in human hemopoietic tumor cell lines by calcium antagonists and calmodulin inhibitors.
verapamil, a calcium-influx blocker, enhanced the cytotoxicity of vincristine (VCR) in vitro 6- to 12-fold in eight human hemopoietic tumor cell lines established from acute lymphatic leukemia, acute… Expand
[Phase I study of S-1. S-1 Study Group].
- T. Taguchi, Y. Inuyama, +19 authors I. Nakao
- Gan to kagaku ryoho. Cancer & chemotherapy
- 1 December 1997
Most adverse reactions observed, including myelosuppression, disappeared by discontinuation of administration, and recovery was in about 2 weeks, and the recommended dose and administration for Early Phase II studies were determined as twice daily administration of 75 mg/body for 28 consecutive days with 14 days rest. Expand
Examination of antitumor activities of platinum complexes of 1,2-diaminocyclohexane isomers and their related complexes.
A dose-escalation and pharmacokinetic study of subcutaneously administered recombinant human interleukin 12 and its biological effects in Japanese patients with advanced malignancies.
- R. Ohno, Y. Yamaguchi, +15 authors T. Taguchi
- Clinical cancer research : an official journal of…
- 1 July 2000
Although immunological response to rhIL-12 varies depending on administration route and schedule and on patients' physiological conditions, the recommended dose for Phase II studies is 300 ng/kg s.c. three times a week for 2 weeks followed by 1-week rest. Expand
Enhancement of vincristine- and adriamycin-induced cytotoxicity by verapamil in P388 leukemia and its sublines resistant to vincristine and adriamycin.
- T. Tsuruo, H. Iida, M. Yamashiro, S. Tsukagoshi, Y. Sakurai
- Chemistry, Medicine
- Biochemical pharmacology
- 1 October 1982
A calcium antagonist, verapamil, enhanced the cellular uptake and cytotoxicity of vincristine (VCR) in adriamycin-resistant P388 leukemia (P388/ADM) cells and also enhanced the cells' cytot toxicity and cellular uptake of ADM in VCR- and ADM-resistant cells. Expand