Cited by 68T-cell and B-cell ImmunologyCancer Immunotherapy and BiomarkersHIV Research and Treatment

Acquired transcriptional programming in functional and exhausted virus-specific CD8 T cells.

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Youngblood, Ben, Wherry, E. John, Ahmed, Rafi·2012·Current Opinion in HIV and AIDS

Abstract

PURPOSE OF REVIEW: Failure to control viral infections such as HIV results in T-cell receptor (TCR) and inhibitory receptor driven exhaustion of antigen-specific T cells. Persistent signaling by these receptors during chronic viral infection sculpts the transcriptional regulatory programs of virus-specific T cells. The resulting gene expression profile is tailored to temper the potentially damaging effector functions of cytotoxic T cells and adapt them to an antigen-rich and inflammation-rich environment. Here we review recent studies investigating mechanisms of transcriptional regulation of effector, functional memory, and exhausted T-cell functions during acute versus chronic infections. RECENT FINDINGS: Patterns of gene expression in virus-specific CD8 T cells are a result of a combination of pro and inhibitory signals from antigen presentation (TCR-mediated) and co-inhibitory receptor ligation (PD-1, 2B4). Further, memory-specific transcriptional regulation of 2B4 expression and signaling impose a self-limiting secondary effector response to a prolonged viral infection. Additionally, differentiation of functional memory CD8 T cells is coupled with acquisition of a repressive epigenetic program for PD-1 expression. However, chronic infection provides a signal that blocks the acquisition of these epigenetic modifications reinforcing the suppression of cytotoxic lymphocyte (CTL) functions in exhausted cells. SUMMARY: Current findings suggest that the mechanism(s) that delineate functional memory versus exhaustion are coupled with acquisition of transcriptional programs at the effector stage of differentiation, reinforced by cessation or persistence of TCR signaling.

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  • Senescent T cells are phenotypically and functionally distinct from exhausted T cells induced by prolonged antigen stimulation.

    “Based on phenotype and function, senescent T cells must not be confused with exhausted T cells induced by prolonged antigen stimulation [40–42].”

    From T-cell aging in rheumatoid arthritis (2014) · cites this paper as [40]

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Authors
Youngblood, B., Wherry, E. J., & Ahmed, R.
Affiliations
  • Emory University (US)
  • University of Pennsylvania (US)
Corresponding author
Youngblood, Ben
Venue
Current Opinion in HIV and AIDS
Published
2012-01
Volume
7
Issue
1
Pages
50-57
ISSN
1746-630X (ISSN-L)
OpenAlex
W1987886529
Cited by
68
References
51
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 3 · 2020: 4 · 2019: 1 · 2018: 3 · 2017: 3 · 2016: 6 · 2015: 10 · 2014: 13 · 2013: 11 · 2012: 5
FWCI
0.83
Type
journal article
Language
en
Open access
Locations
  • Current Opinion in HIV and AIDS (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Allergy and Infectious Diseases (HHSN266200500030C, AI 082630, AI095608, U19AI083022, P01AI080192, AI078897, AI071309, P01AI078897, R01AI071309, AI 083022, R01AI030048, U01AI095608, U19AI082630)
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 › Virology › HIV Research and Treatment
Keywords
CD8+ T cell exhaustion, transcriptional regulation, HIV, chronic viral infection, PD-1, 2B4, T cell receptor signaling, co-inhibitory receptors, epigenetic regulation, gene expression profiling, T cell differentiation
MeSH terms
Antigens, Viral, Gene Expression Regulation, HIV, Humans, Immunologic Memory, Transcription, Genetic, CD8-Positive T-Lymphocytes, Gene Expression Profiling

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