期刊
CELL TRANSPLANTATION
卷 24, 期 6, 页码 1167-1181出版社
SAGE PUBLICATIONS INC
DOI: 10.3727/096368914X679327
关键词
CD137; Graft-versus-host disease (GVHD); Graft-versus-leukemia (GVL) effect; Allodepletion; Immunotoxin
资金
- National Research Foundation of Korea (NRF) - Ministry of Education, Science and Technology [2009-0094050]
- Korean Health Technology R&D Project, Ministry of Health & Welfare, Republic of Korea [HI13C1325]
Depletion of alloreactive T-lymphocytes from allogeneic bone marrow transplants may prevent graft-versus-host disease (GVHD) without impairing donor cell engraftment, immunity, and the graft-versus-leukemia (GVL) effect. Alloreactive T-cells may be identified by their expression, upon activation, of CD137, a costimulatory receptor and putative surrogate marker for antigen-specific effector T-cells. In this context, we tested the use of anti-CD137 saporin immunotoxin to selectively deplete mouse and human alloreactive T-cells. Anti-CD137 antibodies were internalized by cells within 4 h of binding to the cell surface CD137, and anti-CD137 saporin immunotoxin effectively killed polyclonally activated T-cells or antigen-stimulated T-cells. Transfer of donor T-cells after allodepletion with anti-CD137 saporin immunotoxin failed to induce any evident expression of GVHD; however, a significant GVL effect was observed. Targeting of CD137 with an immunotoxin was also effective in killing polyclonally activated or alloreactive human T-cells. Our results indicate that anti-CD137 saporin immunotoxin may be used to deplete alloreactive T-cells prior to bone marrow transplantation and thereby prevent GVHD and the relapse of leukemia.
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