PMID: 6168692Oct 1, 1981Paper

Specific unresponsiveness to skin allografts in anti-lymphocyte serum-treated, marrow-injected mice: participation of donor marrow-derived suppressor T cells

The Journal of Immunology : Official Journal of the American Association of Immunologists
T MakiA P Monaco

Abstract

Sequential changes of cell-mediated immune reactivities were examined in anti-lymphocyte serum-(ALS) treated, C3H/He (C3H; H-2k) bone marrow-injected (C57BL/6 X A)F1 (B6AF1; H-2b/k.d) mice bearing enhanced C3H skin grafts. Spleen cells of these mice exhibited marked suppression of the proliferative response to phytohemagglutinin and concanavalin A. When the spleen cells were assayed for the direct lymphocyte-mediated cytotoxicity against H-2k targets, their lytic activity remained low until the time of graft rejection, in contrast to the increasingly high cytotoxic activity exhibited by spleen cells of control B6AF1 mice given only ALS and C3H skin grafts. When spleen cells of marrow-injected B6AF1 mice were cultured with mitomycin-C treated C3H spleen cells, the proliferative response was significantly suppressed the throughout the course, despite the early appearance of high "secondary-type" cytotoxic activity. Co-culture experiments demonstrated the presence of C3H antigen-specific suppressor cells in the ALS-treated, marrow-injected mice bearing intact allografts. Treatment of spleen cells with anti-H-2, anti-Thy 1 and anti-I-J sera and C revealed that the suppressor cells present late in the marrow-injected mice were T cel...Continue Reading

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