Superiority of cyclosporin A over PSC-833 in enhancement of VP-16 efficacy in murine tumors in vivo.

Abstract:

:PSC-833, a non immunosuppressive analogue of cyclosporin A, is an effective modulator of the multidrug-resistant tumor phenotype. Since both PSC-833 and cyclosporin A also enhance the cytotoxicity of VP-16 against drug sensitive L1210 leukemia cells in vitro we compared these agents as modulators of VP-16 efficacy in vivo. Compared to VP-16 treatment alone both PSC-833 and cyclosporin A significantly altered the survival of L1210 leukemia-bearing BDF/1 mice and Lewis lung carcinoma-bearing C57/B1 mice. Cyclosporin A enhanced VP-16 efficacy whereas PSC-833 impaired VP-16 efficacy against these murine tumors. Possible reasons for these disparate effects are discussed.

authors

Slater LM,Sweet P,Stupecky M,Osann K

doi

10.1007/s002800050597

subject

Has Abstract

pub_date

1997-01-01 00:00:00

pages

452-4

issue

5

eissn

0344-5704

issn

1432-0843

journal_volume

39

pub_type

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