Evidence map›Paper›PMID 22535200›Full record

ArticleGenes and immunity2012

Unique contribution of IRF-5-Ikaros axis to the B-cell IgG2a response.

C-M Fang, S Roy, E Nielsen, M Paul, R Maul, A Paun, F Koentgen, F M Raval, E Szomolanyi-Tsuda, P M Pitha

Open access · bronzeAbstract read
In one paragraph

Article in Genes and immunity, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 11% 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

28 citing papers in PubMed, 1 synthesis or guideline pooled it, 49 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Unraveled role of TLR7-mediated interferon signaling activation in COVID-19.Frontiers in cellular and infection microbiology · 2025
    Review
  4. Review
  5. Article
  6. Review
  7. IKAROS in Acute Leukemia: A Positive Influencer or a Mean Hater?International journal of molecular sciences · 2023
    Review
  8. Article
  9. Immunogenetics of Lupus Erythematosus.Advances in experimental medicine and biology · 2022
    Article
  10. Article
  11. Article
  12. Review
  13. Observational
  14. Article
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors at 5 institutions in 1 country.

C-M FangDepartment of Biology, Johns Hopkins University, Baltimore, MD 21218, USA.
S Roy
E Nielsen
M Paul
R Maul
A Paun
F Koentgen
F M Raval
E Szomolanyi-Tsuda
P M Pitha
Johns Hopkins University · USUniversity of Massachusetts Chan Medical School · USNational Institute of Allergy and Infectious Diseases · USNational Institute on Aging · USSidney Kimmel Comprehensive Cancer Center · US

Funding

POLYOMAVIRUS INFECTION IN IMMUNODEFICIENT MICER01CA066644 · NCI · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI SZOMOLANYI-TSUDA, EVA · 1997 to 2011
$2.8M
Innate antiviral response and predisposition to neoplasia in IRF-5 deficient mousR01AI067632 · NIAID · JOHNS HOPKINS UNIVERSITY · PI PITHA-ROWE, PAULA M · 2006 to 2010
$2.2M
B cell activation during viral infectionR01AI073651 · NIAID · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI WELSH, RAYMOND M · 2007 to 2011
$2.0M
NCI NIH HHS R01 CA066644NCI NIH HHS R01 CA 66644NIAID NIH HHS 3R01-AI1067632-05S1NIAID NIH HHS AI067632NIAID NIH HHS AI 073651NIAID NIH HHS R01 AI067632NIAID NIH HHS R01 AI073651
6 · The paper itself

Abstract

IRF-5 is a transcription factor activated by toll like receptor (TLR)7 and TLR9 during innate immune responses. IRF-5 activates not only Type I IFN, but also inflammatory cytokines. Most importantly, a genetic variation in the IRF-5 gene shows a strong association with autoimmune diseases such as Lupus. Here, we report that IRF5-deficient mice have attenuated IgG2a/c responses to T-cell-dependent and -independent antigens and to polyoma virus infection. This defect is due to the intrinsic deletion of IRF-5 in B cells, as SCID mice reconstituted with Irf5-/- B cells show a decrease in IgG2a/c expression after viral infection compared with mice that received wild-type B cells. Irf5-/-B cells in vitro have diminished TLR and cytokine-induced class switching to IgG2a/c. Addressing the molecular mechanism, we show that IRF-5 regulates IgG2a/c expression by decreasing Ikaros expression; reconstitution of IRF-5 in Irf5-/- B cells downregulates Ikaros levels and increases switching to IgG2a/c. The IRF site in ikzf1 promoter binds IRF-5, IRF-4 and IRF-8. We show that IRF-8 but not IRF-4 activates the ikzf1 promoter, and IRF-5 inhibits the transcriptional activity of IRF-8. Collectively, these results identify the IRF-5-Ikaros axis as a critical modulator of IgG2a/c class switching.

Indexed as

Signal TransductionAICDA (Activation-Induced Cytidine Deaminase)AnimalsAntigensBinding SitesB-LymphocytesCell LineCytidine DeaminaseGene Expression RegulationGerm CellsHumansIkaros Transcription FactorImmunity, HumoralImmunoglobulin Class SwitchingImmunoglobulin GInterferon Regulatory Factor-4AICDA (Activation-Induced Cytidine Deaminase)AntigensCytidine DeaminaseIkaros Transcription FactorImmunoglobulin GInterferon Regulatory Factor-4Interferon Regulatory Factor-7Interferon Regulatory Factor-8Interferon Regulatory FactorsIrf5 protein, mouseT-bet Transcription FactorT-Box Domain ProteinsZfpn1a1 protein, mouse

Identifiers

PMID22535200
PMCPMC3628768
OpenAlexW2035035380

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.