Effects of combined therapies with protein-bound polysaccharide (PSK, Krestin) and fluorinated pyrimidine derivatives on experimental liver metastases and on the immunologic capacities of the hosts.

Abstract:

:An experimental model is introduced for the study of liver metastases using intrasplenically injected EL-4 and Lewis lung tumor cells. Fluorinated pyrimidine derivatives, 1-(2-tetrahydrofuryl)-5-fluorouracil and 5-fluorouracil, showed inhibitory effects on the frequencies of liver metastases. Immunosuppressive effects of these drugs were compared at the doses capable of showing 50% inhibition of the development of metastatic nodules. These derivatives strongly suppressed the phagocytic activity and the number of Kupffer cells of the liver and then the humoral response against sheep red blood cells, the delayed hypersensitivity against picryl chloride. On the contrary, combined administration of protein-bound polysaccharide (PSK) and 1-(2-tetrahydrofuryl)-5-fluorouracil showed no inhibitory effect on these activities.

journal_name

Oncology

journal_title

Oncology

authors

Tsuru S,Shinomiya N,Katsura Y,Gotoh M,Noritake M,Nomoto K

doi

10.1159/000226989

subject

Has Abstract

pub_date

1991-01-01 00:00:00

pages

498-504

issue

6

eissn

0030-2414

issn

1423-0232

journal_volume

48

pub_type

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