GSBS Student Publications

Title

Treatment of allograft recipients with donor-specific transfusion and anti-CD154 antibody leads to deletion of alloreactive CD8+ T cells and prolonged graft survival in a CTLA4-dependent manner

GSBS Program

Biochemistry & Molecular Pharmacology

UMMS Affiliation

Graduate School of Biomedical Sciences; Program in Immunology and Virology; Department of Medicine, Division of Diabetes; Department of Pathology

Date

12-22-1999

Document Type

Article

Medical Subject Headings

Animals; Antibodies, Monoclonal; Antigens, CD; Antigens, CD40; Antigens, CD8; Antigens, Differentiation; *Blood Transfusion; CD40 Ligand; CD8-Positive T-Lymphocytes; Combined Modality Therapy; Epitopes, T-Lymphocyte; Female; Graft Survival; *Immunoconjugates; Immunophenotyping; Immunosuppressive Agents; Isoantigens; Ligands; Lymph Nodes; Lymphocyte Activation; Lymphocyte Count; *Lymphocyte Depletion; Male; Membrane Glycoproteins; Mice; Mice, Inbred BALB C; Mice, Inbred C57BL; Mice, Inbred CBA; Mice, Knockout; Mice, Transgenic; Skin Transplantation; Thymectomy; Time Factors

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

A two-element protocol consisting of one donor-specific transfusion (DST) plus a brief course of anti-CD154 mAb greatly prolongs the survival of murine islet, skin, and cardiac allografts. To study the mechanism of allograft survival, we determined the fate of tracer populations of alloreactive transgenic CD8+ T cells in a normal microenvironment. We observed that DST plus anti-CD154 mAb prolonged allograft survival and deleted alloreactive transgenic CD8+ T cells. Neither component alone did so. Skin allograft survival was also prolonged in normal recipients treated with anti-CD154 mAb plus a depleting anti-CD8 mAb and in C57BL/6-CD8 knockout mice treated with anti-CD154 mAb monotherapy. We conclude that, in the presence of anti-CD154 mAb, DST leads to an allotolerant state, in part by deleting alloreactive CD8+ T cells. Consistent with this conclusion, blockade of CTLA4, which is known to abrogate the effects of DST and anti-CD154 mAb, prevented the deletion of alloreactive transgenic CD8+ T cells. These results document for the first time that peripheral deletion of alloantigen-specific CD8+ T cells is an important mechanism through which allograft survival can be prolonged by costimulatory blockade. We propose a unifying mechanism to explain allograft prolongation by DST and blockade of costimulation.

Rights and Permissions

Citation: J Immunol. 2000 Jan 1;164(1):512-21.

Related Resources

Link to article in PubMed

Journal Title

Journal of immunology (Baltimore, Md. : 1950)

PubMed ID

10605049