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. 1977 Mar;35(3):357–368. doi: 10.1038/bjc.1977.50

Radiolabelling of Corynebacterium parvum and its distribution in mice.

T E Sadler, W A Cramp, J E Castro
PMCID: PMC2025284  PMID: 851511

Abstract

Corynebacterium parvum was labelled by growing live bacteria in the presence of [3H]thymidine. The bacteria were killed by formalin, washed thoroughly and resuspended at a concentration of 7 mg dry weight/ml. An activity of 1-6 X 10(5) ct/min/0-1 ml was obtained. The biological properties (inhibition of tumour growth and hepatosplenomegaly) of the labelled C. parvum were compared with those of commercially available vaccine, and were found to be similar. Labelled C. parvum was injected i.v., i.p., or s.c. into normal C57BL mice and the localization of activity determined at 4 h and 1,3,7 and 14 days after injection. After i.v. or i.p. injection, highest counts were recorded in the liver. Moderate activity was found in the spleen, lungs and small gut. After s.c. injection, the majority of radioactive label was detected at the site of injection and little found in other tissues. The distribution of injected C. parvum was also studied in mice bearing Lewis tumour, and was found to be similar to that in normal mice. Moderate amounts of labelled C. parvum were recovered from tumour. There appeared to be no relationship between the antitumour effect of C. parvum given by a particular route of injection and the concentration of C. parvum recovered from the tumour.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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