Activation of autologous or HLA-identical sibling cytotoxic T lymphocytes by blood derived dendritic cells pulsed with tumor cell extracts.
This study describes the effect of dendritic cells (DC) pulsed with tumor cell extracts on the induction and activation of autologous and HLA-identical sibling tumor cell specific cytotoxic T lymphocytes (CTL). The subjects of the study were patients with hematological malignancies (acute myeloid leukemia, acute lymphoblastic leukemia, and multiple myeloma), and stem cell transplant donors. Although lymphocytes primed with non-pulsed DC did not show definite cytotoxic activity against autologous or HLA-identical sibling patient tumor cells, both autologous and HLA-identical sibling CTL activated by DC pulsed with tumor cell extracts demonstrated markedly significant killing activity against tumor cells in the fashion of higher cytotoxicity with the increase of effector:target ratio (p<0.05). These findings reveal that DC pulsed with tumor cell extracts could be efficiently applicable in anti-tumor immunotherapy for patients with hematological malignancies.
Osman
Y
Y
First Department of Internal Medicine, School of Medicine, Niigata University, Niigata 951-8518, Japan.
Takahashi
M
M
Zheng
Z
Z
Toba
K
K
Liu
A
A
Furukawa
T
T
Aizawa
Y
Y
Shibata
A
A
Koike
T
T
D000328:Adult; D000368:Aged; D000951:Antigens, Neoplasm / Q000276:immunology; D003602:Cytotoxicity, Immunologic; D003713:Dendritic Cells / Q000276:immunology*; D005260:Female; D006680:HLA Antigens; D019337:Hematologic Neoplasms / Q000276:immunology* / Q000628:therapy*; D018380:Hematopoietic Stem Cell Transplantation; D006650:Histocompatibility Testing; D006801:Humans; D016219:Immunotherapy, Adoptive; D008213:Lymphocyte Activation; D008297:Male; D008875:Middle Aged; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000637:transplantation; D014182:Transplantation, Autologous; D014184:Transplantation, Homologous
D000951:Antigens, Neoplasm; D006680:HLA Antigens