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. 1988 Jul;64(3):457–461.

Lectin-induced cytotoxic activity in spleen cells from young and old mice. Age-related changes in types of effector cells, lymphokine production and response.

R K Saxena 1, Q B Saxena 1, W H Adler 1
PMCID: PMC1385058  PMID: 3137156

Abstract

Concanavalin A (Con A)-induced cytotoxic activity, interferon (IFN) and interleukin-2 (IL-2) levels in cultures of spleen cells from young (2-3 months) and old (22-24 months) C57BL/6 female mice were studied. Con A-activated spleen cells from old mice attained significantly higher cytotoxic activity compared with activated spleen cells from young mice. Activated spleen cells from old and young mice showed differences in their ability to lyse different types of target cells. Both could lyse P-815 cells, neither could lyse K562 cells, and only activated cells from old mice could lyse EL-4 cells. Cytotoxic spleen cells from the old mice were more sensitive to anti-asialo-GM-1 and anti-Lyt-2.2 plus complement (C) treatment. While levels of IL-2 produced by spleen cells from young mice were higher, the addition of exogenous IL-2 had no effect on cytotoxic activity of the spleen cells from old mice. Exogenous IL-2, however, could lower cytotoxic activity of Con A-activated spleen cells from young mice. Activated spleen cells from old mice generated higher levels of IFN-gamma while the addition of an anti-IFN-gamma antibody boosted the level of cytotoxicity by Con A-activated spleen cells from young mice. These results suggest that IFN-gamma may act as a feedback inhibitory signal regulating the levels of cytotoxicity induced in spleen cells from young mice in response to Con A. The cytotoxic activity generated in Con A-activated spleen cells from old mice reflects a defect in this feed-back regulation.

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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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