Cited by 365Monoclonal and Polyclonal Antibodies ResearchT-cell and B-cell ImmunologyImmunotherapy and Immune Responses

Induction of regular cytolytic T cell synapses by bispecific single-chain antibody constructs on MHC class I-negative tumor cells

Offner, Sonja, Hofmeister, Robert, Romaniuk, Andrea, Kufer, Peter, Baeuerle, Patrick A.·2006·Molecular Immunology

Abstract

Certain bispecific single-chain antibody constructs exhibit an extraordinary potency for polyclonal T cell engagement and target cell lysis. Here we studied the structural basis for this potency, using laser scanning confocal microscopy. Cytolytic human T cell synapses could be triggered either by addition of a specific peptide antigen or an Ep-CAM-/CD3-bispecific T cell engager (BiTE). Both kinds of synapses showed a comparable distribution of all protein markers investigated. Two other BiTEs constructed from different Ep-CAM-specific antibodies gave similar results. BiTEs could also induce lytic synapses between human T cells and a MHC class I-negative, Ep-CAM cDNA-transfected cell line resulting in potent target cell lysis. This shows that certain T cell recognition molecules on target cells are dispensable for synapse formation and BiTE activity, and suggests that BiTE-activated polyclonal T cells may ignore major immune evasion mechanisms of tumor cells in vivo, such as loss of MHC class I expression.

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Crossref · 10.1016/j.molimm.2005.03.007

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  • BiTEs induce immunological cytolytic synapses identical to synapses induced by regular T cell stimuli, even in the absence of MHC class I molecules.

    “BiTEs have been demonstrated to induce immunological cytolytic synapses identical to synapses induced by regular T cell stimuli, 49 even in the absence of MHC class I molecules, as shown by the lysis of EpCAM-expressing K562 cells or transfected rodent cells expressing the target antigen by human effector cells.”

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Authors
Offner, S., Hofmeister, R., Romaniuk, A., Kufer, P., & Baeuerle, P. A.
Affiliations
Institut für Immunologie (DE)
Corresponding author
Baeuerle, Patrick A.
Venue
Molecular Immunology
Publisher
Elsevier BV
Published
2006-02
Volume
43
Issue
6
Pages
763-771
ISSN
0161-5890 (ISSN-L)
OpenAlex
W2020634797
Cited by
365
References
39
Citations by year
2026: 15 · 2025: 25 · 2024: 24 · 2023: 33 · 2022: 30 · 2021: 40 · 2020: 30 · 2019: 24 · 2018: 15 · 2017: 21 · 2016: 13 · 2015: 17 · 2014: 15 · 2013: 12 · 2012: 15
FWCI
3.82
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
bispecific T-cell engagers, single-chain antibody, T cell synapse, cytotoxic T lymphocytes, EpCAM, target cell lysis, peptide antigens, tumor immune evasion
MeSH terms
Cell Communication, Humans, Lymphocyte Activation, Neoplasms, T-Lymphocytes, Cytotoxic, Histocompatibility Antigens Class I, Antibodies, Bispecific, Microscopy, Confocal, Coculture Techniques, Epitopes, T-Lymphocyte, Tumor Escape, Cell Line, Tumor

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