Y. Sakurai

Publications249
h-index32
Citations6,234
Highly Influential Citations83
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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.
TLDR
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.
Increased accumulation of vincristine and adriamycin in drug-resistant P388 tumor cells following incubation with calcium antagonists and calmodulin inhibitors.
TLDR
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.
Active efflux of daunorubicin and adriamycin in sensitive and resistant sublines of P388 leukemia.
TLDR
There is an active outward transport mechanism for anthracyclines in P388 leukemia cells and that enhanced activity of this efflux process renders cells highly resistant to the cytostatic and cytotoxic effects of ADR and DAU.
Circumvention of vincristine and Adriamycin resistance in vitro and in vivo by calcium influx blockers.
TLDR
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.
Antitumor activity of a new platinum complex, oxalato (trans-l-1,2-diaminocyclohexane)platinum (II): new experimental data.
Evaluation of antitumor activity in a human breast tumor/nude mouse model with a special emphasis on treatment dose
TLDR
The results agree with the reported clinical results compared with those with MTD, suggesting the importance of the use of clinically equivalent doses in the evaluation of antitumor efficacy in a human tumor/nude mouse system.
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…
Active efflux common to vincristine and daunorubicin in vincristine-resistant P388 leukemia.
6-Mercaptopurine-induced potentiation of active immunotherapy in L1210-bearing mice treated with concanavalin A-bound leukemia cell vaccine.
TLDR
Results show that 6-MP not only reduced the tumor burden but also potentiated the vaccine-dependent antitumor immunity, resulting in the induction of an augmented therapeutic response.
Taxonomy of the causal fungus of trunk-blight of Xanthoxylum piperitum and heterothallism in this fungus
TLDR
The results of reciprocal spermatization among the monoascosporic strains proved that this fungus is hermaphroditic and shows the compatibility heterothallism.
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