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. 1984 Jun;49(6):769–777. doi: 10.1038/bjc.1984.120

B16 melanoma development, NK activity cytostasis and natural antibodies in 3 and 12 month old mice.

R Ehrlich, N Smorodinsky, M Efrati, M Yaakubowicz, I P Witz
PMCID: PMC1976857  PMID: 6733023

Abstract

Three types of natural immune responses against malignant cells were studied in vitro: Cytotoxicity mediated by splenic NK cells; cytostasis mediated by splenocytes and binding of naturally occurring antibodies to various tumour targets. These responses were studied in untreated 3 and 12 month old mice and in mice of both age groups inoculated with B16 melanoma cells. The results showed that in normal mice NK activity decreases with age, cytostatic activity remains unchanged and the titre of natural antibodies increases. Twelve-month old mice were shown to be appreciably more resistant than 3 month old mice to the development of tumours from subthreshold numbers of B16 tumour cells. In mice injected with threshold amounts of the B16 tumour, there was no change in any of the responses in the tumour-free period, but there was a decrease in NK activity and an increase in cytostatic activity when a large tumour mass developed. An increase in the titre of natural antibodies in young mice injected with the tumour was also seen. The correlation between these changes and tumour appearance and development is discussed.

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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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