Cited by 174Monoclonal and Polyclonal Antibodies ResearchImmunotherapy and Immune ResponsesT-cell and B-cell Immunology

Induction of a long-lasting antitumor immunity by a trifunctional bispecific antibody

Ruf, Peter, Lindhofer, Horst·2001·Blood

Abstract

Bispecific antibodies (bsAbs) can efficiently mediate tumor cell killing by redirecting preactivated or costimulated T cells to disseminated tumor cells, especially in a minimal residual disease situation. This study demonstrates that the trifunctional bsAb BiLu is able to kill tumor cells very efficiently without any additional costimulation of effector cells in vitro and in vivo. Remarkably, this bsAb also induces a long-lasting protective immunity against the targeted syngeneic mouse tumors (B16 melanoma and A20 B-cell lymphoma, respectively). A strong correlation was observed between the induction of a humoral immune response with tumor-reactive antibodies and the survival of mice. This humoral response was at least in part tumor specific as shown in the A20 model by the detection of induced anti-idiotype antibodies. Both the survival of mice and antitumor titers were significantly diminished when F(ab′)2 fragments of the same bsAb were applied, demonstrating the importance of the Fc region in this process. With the use of T-cell depletion, a contribution of a cellular antitumor response could be demonstrated. These results reveal the necessity of the Fc region of the bsAb with its potent immunoglobulin subclass combination mouse immunoglobulin G2a (IgG2a) and rat IgG2b. The antigen-presenting system seems to be crucial for achieving an efficient tumor cell killing and induction of long-lasting antitumor immunity. Hereby, the recruitment and activation of accessory cells by the intact bsAb is essential.

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Crossref · 10.1182/blood.v98.8.2526

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32 of 32 references verified0 citation errors · 0 not checkable

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  • In animal studies, 100% of mice administered an injection of 4 μg of triomabs survived after intraperitoneal injection of a lethal dose of EpCAM+ melanoma cells.

    “In animal studies, 100% of mice administered an injection of 4 μg of triomabs survived after intraperitoneal (IP) injection of a lethal dose of EpCAM + melanoma cells. 25”
  • All mice rechallenged on day 144 after the primary challenge were still able to reject the tumor, indicating high efficacy and long duration of the antitumor response.

    “All mice rechallenged on day 144 after the primary challenge were still able to reject the tumor, indicating the high efficacy and long duration of the antitumor response.”
  • The antitumor effect was dependent on the presence of the hybrid Fc and involved a humoral response directed against non-transfected (EPCAM-) tumor cells.

    “This effect was dependent on the presence of the hybrid Fc, and involved a humoral response directed against the non-transfected (EPCAM -) tumor cells.”

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Authors
Ruf, P., & Lindhofer, H.
Affiliations
Helmholtz Munich (DE)
Venue
Blood
Published
2001-10-15
Volume
98
Issue
8
Pages
2526-2534
ISSN
  • 0006-4971 (ISSN-L)
  • 1528-0020
OpenAlex
W1972848082
Cited by
174
References
34
Citations by year
2025: 2 · 2024: 3 · 2023: 1 · 2022: 4 · 2021: 6 · 2020: 2 · 2019: 5 · 2018: 3 · 2017: 4 · 2016: 11 · 2015: 9 · 2014: 15 · 2013: 9 · 2012: 16
FWCI
2.66
Type
journal article
Language
en
Open access
closed
Locations
  • Blood (publishedVersion)
  • PubMed (publishedVersion)
  • Site cant be reached (submittedVersion)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
bispecific antibodies, trifunctional antibody, antitumor immunity, Fc fragment, humoral immune response, anti-idiotypic antibodies, T cell depletion, antigen-presenting cells, B16 melanoma, tumor cell killing, immunoglobulin G2a, tumor-specific antibodies
MeSH terms
Animals, Antibodies, Neoplasm, Antibody Formation, Antibody Specificity, Cytotoxicity, Immunologic, Enzyme-Linked Immunosorbent Assay, Flow Cytometry, Immunoglobulin G, Immunoglobulin Idiotypes, Immunoglobulin Fab Fragments, Immunoglobulin Fc Fragments, Melanoma, Experimental, Mice, Inbred BALB C, Mice, Inbred C57BL, Survival Rate, Antibodies, Bispecific, Mice, Rats

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