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. 1990 Jul;81(1):116–122. doi: 10.1111/j.1365-2249.1990.tb05300.x

Early accumulation of suppressor cell precursors in the spleen of Mycobacterium lepraemurium-infected mice and analysis of their in vitro-induced maturation.

S Lemieux 1, D Gosselin 1, Y Lusignan 1, R Turcotte 1
PMCID: PMC1535006  PMID: 2143124

Abstract

Spleen cells harvested from mice infected intraperitoneally with M. lepraemurium 11-17 weeks prior to harvest acquired the capacity to inhibit concanavalin A (Con A) induced proliferation of normal spleen cells when precultured for up to 24 h in mitogen-free medium. The in vivo induced suppressor activity correlated with the length of the preculture period, the time post-infection and the infecting dose. These findings were interpreted as an indication that suppressor cell precursors accumulated in the spleen of infected mice during the early phase of the disease. The interaction of infection-dependent adherent suppressor cell precursors and infection-independent, non-adherent regulatory cells is necessary for the suppressor activity to develop. Both the cells which transmit the inductive signal and the precursor cells which mature into active suppressor cells are radiosensitive, whereas suppressor activity itself is a function of radioresistant adherent cells. Preculture of cells for a short period, before they were cocultured with Con A-stimulated normal spleen cells, allowed the detection of suppressor cells before they were deleterious to the infected host and also turned out to be a relevant in vitro model for characterization of suppressor cell development during M. lepraemurium infection.

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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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