Human c-erbB-2 proto-oncogene product as a target for bispecific-antibody-directed adoptive tumor immunotherapy.
To develop an efficient strategy for the targeting of anti-tumor effector cells, we prepared bispecific antibody (BsAb) containing anti-CD3 and an anti-c-erbB-2 proto-oncogene product. The prepared BsAb specifically reacts with both c-erbB-2-positive tumor cells and CD3+ CTL. Human CD4+ helper/killer T cells, induced from peripheral-blood mononuclear cells by activation with immobilized anti-CD3 monoclonal antibody (MAb) plus IL-2, showed no significant cytotoxicity against tumor cells. However, treatment of human CD4+ helper/killer cells with the BsAb caused the induction of specific cytotoxicity against c-erbB-2-positive tumor cells. CD4+ helper/killer cells also produced significant amounts of IL-2 during co-culture with c-erbB-2-positive tumor cells in the presence of the BsAb. Moreover, by combination with the BsAb, CD4+ helper/killer cells showed a strong in vivo anti-tumor effect against c-erbB-2 transfectant or human colon-cancer cells implanted in nude mice. Our results strongly suggest that the c-erbB-2 proto-oncogene product on human tumor cells may be a good target for BsAb-directed adoptive tumor immunotherapy.
Department of Immunology, Tokai University School of Medicine, Isehara, Japan.
T
T
Nishimura
Y
Y
Nakamura
H
H
Tsukamoto
Y
Y
Takeuchi
Y
Y
Tokuda
M
M
Iwasawa
T
T
Yamamoto
T
T
Masuko
Y
Y
Hashimoto
S
S
Habu
D000911:Antibodies, Monoclonal / Q000627:therapeutic use*; D000945:Antigens, Differentiation, T-Lymphocyte / Q000032:analysis / Q000276:immunology*; D017252:CD3 Complex; D015704:CD4 Antigens / Q000032:analysis; D006801:Humans; D016219:Immunotherapy, Adoptive; D007694:Killer Cells, Natural / Q000276:immunology*; D009369:Neoplasms / Q000628:therapy*; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins / Q000032:analysis / Q000276:immunology*; D018719:Erb-b2 Receptor Tyrosine Kinases; D011948:Receptors, Antigen, T-Cell / Q000032:analysis / Q000276:immunology*; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology*
D000911:Antibodies, Monoclonal; D000945:Antigens, Differentiation, T-Lymphocyte; D017252:CD3 Complex; D015704:CD4 Antigens; D000090063:Proto-Oncogene Mas; D011518:Proto-Oncogene Proteins; D018719:Erb-b2 Receptor Tyrosine Kinases; D011948:Receptors, Antigen, T-Cell; C000715470:MAS1 protein, human