Cited by 2,768Monoclonal and Polyclonal Antibodies ResearchImmune Cell Function and InteractionT-cell and B-cell Immunology

Inhibitory Fc receptors modulate in vivo cytoxicity against tumor targets

Clynes, Raphael A., Towers, Terri L., Presta, Leonard G., Ravetch, Jeffrey V.·2000·Nature Medicine

Abstract

Inhibitory receptors have been proposed to modulate the in vivo cytotoxic response against tumor targets for both spontaneous and antibody-dependent pathways. Using a variety of syngenic and xenograft models, we demonstrate here that the inhibitory FcgammaRIIB molecule is a potent regulator of antibody-dependent cell-mediated cytotoxicity in vivo, modulating the activity of FcgammaRIII on effector cells. Although many mechanisms have been proposed to account for the anti-tumor activities of therapeutic antibodies, including extended half-life, blockade of signaling pathways, activation of apoptosis and effector-cell-mediated cytotoxicity, we show here that engagement of Fcgamma receptors on effector cells is a dominant component of the in vivo activity of antibodies against tumors. Mouse monoclonal antibodies, as well as the humanized, clinically effective therapeutic agents trastuzumab (Herceptin(R)) and rituximab (Rituxan(R)), engaged both activation (FcgammaRIII) and inhibitory (FcgammaRIIB) antibody receptors on myeloid cells, thus modulating their cytotoxic potential. Mice deficient in FcgammaRIIB showed much more antibody-dependent cell-mediated cytotoxicity; in contrast, mice deficient in activating Fc receptors as well as antibodies engineered to disrupt Fc binding to those receptors were unable to arrest tumor growth in vivo. These results demonstrate that Fc-receptor-dependent mechanisms contribute substantially to the action of cytotoxic antibodies against tumors and indicate that an optimal antibody against tumors would bind preferentially to activation Fc receptors and minimally to the inhibitory partner FcgammaRIIB.

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Crossref · 10.1038/74704

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  • IgG modulates cellular immune responses through FcγR-binding and direct receptor- or ligand-binding.

    “They modulate cellular immune responses through Fcγ receptor (FcγR)-binding as well as through direct receptor- or ligand-binding [9,10].”
  • In mice lacking FcγRIII and thus deficient in NK cells and macrophages capable of binding the Fc region of trastuzumab, the therapeutic effect of trastuzumab was markedly diminished.

    “In mice lacking FcγRIII and, thus, deficient in NK cells and macrophages capable of binding the Fc region of trastuzumab, the therapeutic effect of trastuzumab was markedly diminished (Clynes et al., 2000).”

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Authors
Clynes, R. A., Towers, T. L., Presta, L. G., & Ravetch, J. V.
Affiliations
  • Rockefeller University (US)
  • Genentech (US)
Corresponding author
Ravetch, Jeffrey V.
Venue
Nature Medicine
Published
2000-04
Volume
6
Issue
4
Pages
443-446
ISSN
  • 1078-8956 (ISSN-L)
  • 1546-170X
OpenAlex
W2128402413
Cited by
2,768
References
21
Citations by year
2026: 44 · 2025: 46 · 2024: 66 · 2023: 95 · 2022: 81 · 2021: 66 · 2020: 83 · 2019: 93 · 2018: 93 · 2017: 99 · 2016: 82 · 2015: 141 · 2014: 138 · 2013: 167 · 2012: 158
FWCI
84.81
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Medicine (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Cell Function and Interaction
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
inhibitory Fc receptor, Fc gamma receptor IIb, Fc gamma receptor III, antibody-dependent cellular cytotoxicity, cancer immunotherapy, therapeutic antibodies, trastuzumab, rituximab, myeloid cells, antibody specificity, antitumor immunity
MeSH terms
Trastuzumab, Rituximab, Animals, Antibodies, Monoclonal, Antibody-Dependent Cell Cytotoxicity, Antineoplastic Agents, Female, Humans, Immunization, Passive, Male, Melanoma, Experimental, Mice, Inbred BALB C, Mice, Nude, Antigens, CD, Lymphoma, B-Cell, Receptors, IgG, Erb-b2 Receptor Tyrosine Kinases, Mice, Antibodies, Monoclonal, Murine-Derived, Antibodies, Monoclonal, Humanized

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