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. 1987 Jul;84(13):4611–4615. doi: 10.1073/pnas.84.13.4611

Induction of cytotoxicity in resting human T lymphocytes bound to tumor cells by antibody heteroconjugates.

G Jung, J A Ledbetter, H J Müller-Eberhard
PMCID: PMC305140  PMID: 3110771

Abstract

An in vitro model for peripheral human T-cell activation and resultant tumor cell killing is described. Cytotoxic T lymphocytes may be generated from resting lymphocytes by incubation of human peripheral blood mononuclear cells for 3 days with the anti-CD3 monoclonal antibody OKT3. Cytotoxicity in peripheral blood mononuclear cells can also be induced by adding an anti-target-OKT3 antibody conjugate and 10% (vol/vol) fetal calf serum to the culture medium. Conjugate activation of T cells was almost completely blocked, however, when 20% (vol/vol) human serum was added to the medium. Conjugate-mediated peripheral blood mononuclear cells activation was restored to some extent by the addition of melanoma target cells to the culture and was markedly enhanced by a second conjugate containing anti-target cell and anti-CD28 antibody. Monoclonal antibody 9.3 (anti-CD28) provides a progression signal in T-lymphocyte activation when used in combination with anti-CD3. Thus, presentation by the tumor target cells of anti-CD3 and anti-CD28 to resting human lymphocytes causes T-cell activation, which is independent of monocytes, proceeds in the presence of human serum, and results in tumor cell killing.

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Selected References

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