Cited by 2,222T-cell and B-cell ImmunologyCancer Immunotherapy and BiomarkersImmunotherapy and Immune Responses

CTLA-4 can function as a negative regulator of T cell activation

Walunas, Theresa L., Lenschow, Deborah J., Bakker, Christina Y., Linsley, Peter S., Freeman, Gordon J., Green, Jonathan M., Thompson, Craig B., Bluestone, Jeffrey A.·1994·Immunity

Abstract

CD28 and CTLA-4 are related glycoproteins found on T cells. Ligation of CD28 following antigen receptor engagement provides a costimulatory signal required for T cell activation. Anti-CTLA-4 antibodies were generated to examine the role of the CTLA-4 receptor on murine T cells. Expression of CTLA-4 as a homodimer is up-regulated 2-3 days following T cell activation. Anti-CTLA-4 antibodies and Fab fragments augmented T cell proliferation in an allogeneic MLR. However, when optimal costimulation and Fc cross-linking were present, anti-CTLA-4 Mabs inhibited T cell proliferation. Together, these results suggest that the MAb may obstruct the interaction of CTLA-4 with its natural ligand and block a negative signal, or directly signal T cells to down-regulate immune function.

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Crossref · 10.1016/1074-7613(94)90071-x

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Authors
Walunas, T. L., Lenschow, D. J., Bakker, C. Y., Linsley, P. S., Freeman, G. J., Green, J. M., Thompson, C. B., & Bluestone, J. A.
Affiliations
  • University of Chicago (US)
  • Howard Hughes Medical Institute (US)
  • Bristol-Myers Squibb (United States) (US)
  • Harvard University (US)
Venue
Immunity
Publisher
Elsevier BV
Published
1994-08
Volume
1
Issue
5
Pages
405-413
ISSN
1074-7613 (ISSN-L)
OpenAlex
W2048073154
Cited by
2,222
References
35
Citations by year
2026: 36 · 2025: 71 · 2024: 84 · 2023: 71 · 2022: 82 · 2021: 114 · 2020: 98 · 2019: 100 · 2018: 91 · 2017: 90 · 2016: 94 · 2015: 85 · 2014: 56 · 2013: 67 · 2012: 56
FWCI
22.26
Type
journal article
Language
en
Open access
closed
Locations
  • Immunity (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p01ai035225-04, 5r01ca040216-13)
  • National Cancer Institute (CA40216)
  • National Institute of Allergy and Infectious Diseases (P01-AI 35294, P01AI035294, AI-35225)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
CTLA-4, CD28, T cell activation, costimulation, negative regulation, anti-CTLA-4 antibody, T cell proliferation, allogeneic mixed lymphocyte reaction, immune tolerance
MeSH terms
Abatacept, Animals, Antibodies, Antibodies, Monoclonal, Antigens, Differentiation, Base Sequence, Cell Division, Humans, Immunoglobulin Fragments, Immunoglobulin Fab Fragments, Lymphocyte Culture Test, Mixed, Lymphocyte Activation, Male, Membrane Proteins, Mice, Inbred BALB C, Mice, Inbred C57BL, Mice, Inbred DBA, Molecular Sequence Data, Receptors, Antigen, T-Cell, T-Lymphocytes, Antigens, CD, CD3 Complex, CD28 Antigens, Immunoconjugates, Mice, CTLA-4 Antigen

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