TY - JOUR
T1 - Eradication of B-CLL by autologous and allogeneic host nonreactive anti-third-party CTLs
AU - Arditti, Fabian D.
AU - Aviner, Shraga
AU - Dekel, Benjamin
AU - Krauthgamer, Rita
AU - Gan, Judith
AU - Nagler, Arnon
AU - Tabilio, Antonio
AU - Martelli, Massimo
AU - Berrebi, Alain
AU - Reisner, Yair
PY - 2005/4/15
Y1 - 2005/4/15
N2 - Establishment of cell lines capable of killing leukemia cells, in the absence of alloreactivity against normal host cells, represents a most desirable goal in bone marrow transplantation (BMT) and cancer immunotherapy. By using a human → mouse chimeric model, we demonstrate that allogeneic anti-third-party cytotoxic T lymphocytes (CTLs) depleted of alloreactivity are endowed with a potent anti-B-cell chronic lymphocytic leukemia (B-CLL) reactivity. Likewise, CTL preparations generated from autologous T cells of the same patients with B-CLL exhibited comparable leukemia eradication, suggesting that the reactivity of allogeneic anti-third-party CTLs is not mediated by residual antihost clones. This specificity was also exhibited in vitro, and annexin staining revealed that B-CLL killing is mediated by apoptosis. While the CTLs killing of third-party cells could be blocked by anti-CD3 antibody, the lysis of the B-CLL cells was not inhibited by this antibody, suggesting a T-cell receptor (TCR)-independent cytotoxicity. The role of cell contact leading to apoptosis of B-CLL cells is shown in transwell plates and by anti-lymphocyte function-associated antigen-1 (LFA-1)-blocking antibody. Up-regulation of CD54 and the subsequent apoptosis of B-CLL cells depend on the initial LFA-1/ICAM-1 (intercellular adhesion molecule 1) interaction. Taken together, these results suggest that allogeneic or autologous host nonreactive anti-third-party CTLs may represent a new therapeutic approach for patients with B-CLL.
AB - Establishment of cell lines capable of killing leukemia cells, in the absence of alloreactivity against normal host cells, represents a most desirable goal in bone marrow transplantation (BMT) and cancer immunotherapy. By using a human → mouse chimeric model, we demonstrate that allogeneic anti-third-party cytotoxic T lymphocytes (CTLs) depleted of alloreactivity are endowed with a potent anti-B-cell chronic lymphocytic leukemia (B-CLL) reactivity. Likewise, CTL preparations generated from autologous T cells of the same patients with B-CLL exhibited comparable leukemia eradication, suggesting that the reactivity of allogeneic anti-third-party CTLs is not mediated by residual antihost clones. This specificity was also exhibited in vitro, and annexin staining revealed that B-CLL killing is mediated by apoptosis. While the CTLs killing of third-party cells could be blocked by anti-CD3 antibody, the lysis of the B-CLL cells was not inhibited by this antibody, suggesting a T-cell receptor (TCR)-independent cytotoxicity. The role of cell contact leading to apoptosis of B-CLL cells is shown in transwell plates and by anti-lymphocyte function-associated antigen-1 (LFA-1)-blocking antibody. Up-regulation of CD54 and the subsequent apoptosis of B-CLL cells depend on the initial LFA-1/ICAM-1 (intercellular adhesion molecule 1) interaction. Taken together, these results suggest that allogeneic or autologous host nonreactive anti-third-party CTLs may represent a new therapeutic approach for patients with B-CLL.
UR - http://www.scopus.com/inward/record.url?scp=20144387140&partnerID=8YFLogxK
U2 - 10.1182/blood-2003-03-0982
DO - 10.1182/blood-2003-03-0982
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C2 - 15238417
AN - SCOPUS:20144387140
SN - 0006-4971
VL - 105
SP - 3365
EP - 3371
JO - Blood
JF - Blood
IS - 8
ER -