Evidence map›Paper›PMID 21943489›Full record

ArticleImmunity2011

Chronic virus infection enforces demethylation of the locus that encodes PD-1 in antigen-specific CD8(+) T cells.

Ben Youngblood, Kenneth J Oestreich, Sang-Jun Ha, Jaikumar Duraiswamy, Rama S Akondy, Erin E West, Zhengyu Wei, Peiyuan Lu, James W Austin, James L Riley and 2 more

Open access · bronzeAbstract read
In one paragraph

Article in Immunity, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 280 papers.

0numbers the graph read from it
0cells of the map it votes in
280citing papers in PubMed
6.8field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

280 citing papers in PubMed, 402 citations in OpenAlex.

  1. Trial
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  6. Article
  7. ILC2s and their immune checkpoints in the antitumor response.Journal for immunotherapy of cancer · 2026
    Review
  8. Review
  9. Article
  10. Review
  11. Regulators of CD8Nature reviews. Immunology · 2026
    Review
  12. Review
  13. Review
  14. Review
  15. Review
  16. Article
  17. Aging and immunity: the age-old tango.Genes & development · 2025
    Review
  18. Review
  19. Review
  20. Review

220 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

12 authors at 4 institutions in 2 countries.

Ben YoungbloodEmory Vaccine Center, Emory University School of Medicine, Atlanta, GA 30322, USA.
Kenneth J Oestreich
Sang-Jun Ha
Jaikumar Duraiswamy
Rama S Akondy
Erin E West
Zhengyu Wei
Peiyuan Lu
James W Austin
James L Riley
Jeremy M Boss
Rafi Ahmed
Emory University · USCancer Research Institute · USUniversity of Pennsylvania · USUniversity of Washington · US

Funding

Targeting the PD-1 signaling pathway to rescue HIV T cell dysfunctionP01AI080192 · NIAID · EMORY UNIVERSITY · PI AHMED, RAFI · 2008 to 2012
$12.6M
T CELL MEMORY TO VIRUSESR37AI030048 · NIAID · EMORY UNIVERSITY · PI AHMED, RAFI · 2001 to 2010
$3.9M
NIAID NIH HHS 1 P01 AI080192-01NIAID NIH HHS 2 R37 AI30048-17NIAID NIH HHS P01 AI080192NIAID NIH HHS R37 AI030048
6 · The paper itself

Abstract

Functionally exhausted T cells have high expression of the PD-1 inhibitory receptor, and therapies that block PD-1 signaling show promise for resolving chronic viral infections and cancer. By using human and murine systems of acute and chronic viral infections, we analyzed epigenetic regulation of PD-1 expression during CD8(+) T cell differentiation. During acute infection, naive to effector CD8(+) T cell differentiation was accompanied by a transient loss of DNA methylation of the Pdcd1 locus that was directly coupled to the duration and strength of T cell receptor signaling. Further differentiation into functional memory cells coincided with Pdcd1 remethylation, providing an adapted program for regulation of PD-1 expression. In contrast, the Pdcd1 regulatory region was completely demethylated in exhausted CD8(+) T cells and remained unmethylated even when virus titers decreased. This lack of DNA remethylation leaves the Pdcd1 locus poised for rapid expression, potentially providing a signal for premature termination of antiviral functions.

Indexed as

DNA MethylationPromoter Regions, GeneticAnimalsAntigens, CDAntigens, SurfaceApoptosis Regulatory ProteinsCD8-Positive T-LymphocytesCell DifferentiationCells, CulturedChronic DiseaseEpigenomicsHumansImmunologic MemoryMiceMice, Inbred C57BLProgrammed Cell Death 1 ReceptorAntigens, CDAntigens, SurfaceApoptosis Regulatory ProteinsPDCD1 protein, humanPdcd1 protein, mouseProgrammed Cell Death 1 Receptor

Identifiers

PMID21943489
PMCPMC3183460
OpenAlexW1985182657

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.