Cited by 1,487T-cell and B-cell ImmunologyImmunotherapy and Immune ResponsesImmune Response and Inflammation

T cell anergy

Schwartz, Ronald H.·2003·Annual Review of Immunology

Abstract

T cell anergy is a tolerance mechanism in which the lymphocyte is intrinsically functionally inactivated following an antigen encounter, but remains alive for an extended period of time in a hyporesponsive state. Models of T cell anergy affecting both CD4 + and CD8 + cells fall into two broad categories. One, clonal anergy, is principally a growth arrest state, whereas the other, adaptive tolerance or in vivo anergy, represents a more generalized inhibition of proliferation and effector functions. The former arises from incomplete T cell activation, is mostly observed in previously activated T cells, is maintained by a block in the Ras/MAP kinase pathway, can be reversed by IL-2 or anti-OX40 signaling, and usually does not result in the inhibition of effector functions. The latter is most often initiated in naïve T cells in vivo by stimulation in an environment deficient in costimulation or high in coinhibition. Adaptive tolerance can be induced in the thymus or in the periphery. The cells proliferate and differentiate to varying degrees and then downregulate both functions in the face of persistent antigen. The state involves an early block in tyrosine kinase activation, which predominantly inhibits calcium mobilization, and an independent mechanism that blocks signaling through the IL-2 receptor. Adaptive tolerance reverses in the absence of antigen. Aspects of both of the anergic states are found in regulatory T cells, possibly preventing them from dominating initial immune responses to foreign antigens and shutting down such responses prematurely.

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Crossref · 10.1146/annurev.immunol.21.120601.141110

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  • T cells that receive antigen with suboptimal CD28 co-stimulation and/or high co-inhibition become anergic, with low IL-2 production and G1/S cell cycle arrest.

    “It is generally accepted that T cells that are presented antigen along with suboptimal CD28 co-stimulation [4,5] and/or high co-inhibition [17] result in anergic phenotypes, as characterized by their low IL-2 production and cell cycle arrest at the G1/S phase.”

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Authors
Schwartz, R. H.
Affiliations
National Institutes of Health (US)
Corresponding author
Schwartz, Ronald H.
Venue
Annual Review of Immunology
Published
2003-04
Volume
21
Issue
1
Pages
305-334
ISSN
  • 0732-0582 (ISSN-L)
  • 1545-3278
OpenAlex
W2112506009
Cited by
1,487
References
131
Citations by year
2026: 40 · 2025: 33 · 2024: 35 · 2023: 58 · 2022: 42 · 2021: 50 · 2020: 56 · 2019: 52 · 2018: 50 · 2017: 59 · 2016: 57 · 2015: 61 · 2014: 63 · 2013: 67 · 2012: 69
FWCI
7.26
Type
journal article
Language
en
Open access
closed
Locations
  • Annual Review of Immunology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
T cell anergy, immune tolerance, anergy, adaptive tolerance, CD4+ T cells, CD8+ T cells, RAS/MAPK pathway, IL-2 signaling, costimulation, tyrosine kinase signaling, calcium mobilization, IL-2 receptor signaling, regulatory T cells, T cell proliferation, persistent antigen
MeSH terms
Abatacept, Adaptation, Physiological, Animals, Antigens, Differentiation, Humans, T-Lymphocytes, CD4-Positive T-Lymphocytes, Antigens, CD, Clonal Anergy, Antigen Presentation, CD8-Positive T-Lymphocytes, Models, Immunological, Immunoconjugates, Intercellular Adhesion Molecule-1, Adoptive Transfer, Mice, CTLA-4 Antigen

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