CD28 Ligation Induces Transplantation Tolerance by IFN-gamma-dependent Depletion of T Cells That Recognize Alloantigens
Overview
Affiliations
Administration of an agonistic anti-CD28 mAb paradoxically inhibits donor T cell expansion and prevents graft-versus-host disease (GVHD) in mice. Here we examined the mechanism of anti-CD28-mediated immunosuppression and found that anti-CD28 mAb activated, rather than blocked, CD28-mediated signaling in vivo. Anti-CD28 treatment prevented GVHD by selectively depleting alloantigen-activated donor T cells through apoptosis but spared the T cells that did not recognize recipient alloantigens. Overexpression of Bcl-x(L) did not protect T cells from depletion and did not affect GVHD prevention after anti-CD28 treatment. Depletion of activated T cells mediated through CD28 did not depend on the expression of death receptors Fas and TNF receptors type I and II, but both the depletion of activated T cells and the suppressive effect of anti-CD28 mAb on GVHD lethality required donor-derived IFN-gamma production. This study demonstrates that agonistic Ab's specific for the CD28 costimulatory molecule may be used as novel therapeutic agents to abrogate pathogenic T cell responses by selective depletion of activated T cells.
Arellano G, Acuna E, Loda E, Moore L, Tichauer J, Castillo C J Neuroinflammation. 2024; 21(1):144.
PMID: 38822334 PMC: 11143617. DOI: 10.1186/s12974-024-03126-3.
CD28 blockade controls T cell activation to prevent graft-versus-host disease in primates.
Watkins B, Tkachev V, Furlan S, Hunt D, Betz K, Yu A J Clin Invest. 2018; 128(9):3991-4007.
PMID: 30102255 PMC: 6118599. DOI: 10.1172/JCI98793.
Advance in Targeted Immunotherapy for Graft-Versus-Host Disease.
Zhang L, Yu J, Wei W Front Immunol. 2018; 9:1087.
PMID: 29868032 PMC: 5964137. DOI: 10.3389/fimmu.2018.01087.
CD28 Costimulation of T Helper 1 Cells Enhances Cytokine Release .
Langenhorst D, Haack S, Gob S, Uri A, Luhder F, Vanhove B Front Immunol. 2018; 9:1060.
PMID: 29868020 PMC: 5964139. DOI: 10.3389/fimmu.2018.01060.
Uri A, Werner S, Luhder F, Hunig T, Kerkau T, Beyersdorf N Front Immunol. 2017; 8:721.
PMID: 28690612 PMC: 5481316. DOI: 10.3389/fimmu.2017.00721.