Tumor-immunotherapeutic efficacy of Serratia marcescens polyribosomes.

Abstract:

:The ability of polyribosomes, obtained from several bacterial species, to suppress the development of cutaneous SaD2 fibrosarcomas in DBA/2 mice were evaluated. Suppression of tumor appearance depended upon the tumor load at the time of treatment, dose of polyribosomes, and species source of polyribosomes, with Serratia marcescens being superior to Escherichia coli, Streptococcus pneumoniae, Mycobacterium bovis (Pasteur), Mycobacterium smegmatis, and Propionibacterium acnes (formerly Corynebacterium parvum). A single injection of 5 or 50 microgram of Serratia polyribosomes at the tumor site 72 hr after the intradermal administration of 1.5 X 10(3) SaD2 cells resulted in 66 to 95% survival. All untreated animals expired within 50 days. Tumor suppression occurred at both flank and footpad sites. Presensitization with polyribosomes and incorporation of polyribosomes into adjuvant were not required for the tumor-suppressive effect. Treatment of Serratia polyribosomes with RNase or pronase reduced the number of survivors. Endotoxin was not detectable with the Limulus amebocyte lysate assay.

journal_name

Cancer Res

journal_title

Cancer research

authors

Urban RW,Edwards BS,Segal W

subject

Has Abstract

pub_date

1980-05-01 00:00:00

pages

1501-5

issue

5

eissn

0008-5472

issn

1538-7445

journal_volume

40

pub_type

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