Evidence map›Paper›PMID 34607464›Full record

ArticlemBio2021

The Tumor Necrosis Factor Alpha and Interleukin 6 Auto-paracrine Signaling Loop Controls Mycobacterium avium Infection via Induction of IRF1/IRG1 in Human Primary Macrophages.

Alexandre Gidon, Claire Louet, Lisa Marie Røst, Per Bruheim, Trude Helen Flo

Open access · goldAbstract read
In one paragraph

Article in mBio, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
1.7field-weighted citation impact, top 13% 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

29 citing papers in PubMed, 36 citations in OpenAlex.

  1. Trial
  2. Review
  3. Itaconate and its derivatives in human health and diseases.Signal transduction and targeted therapy · 2026
    Review
  4. mBio · 2026
    Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Fullerene Gallium Phosphonate Shows Antimycobacterial Effect AgainstInternational journal of molecular sciences · 2025
    Article
  10. Reprogramming immunity with itaconate: metabolic mechanisms and therapeutic perspectives.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2025
    Review
  11. Host-directed therapy for tuberculosis.European journal of medical research · 2025
    Review
  12. Review
  13. Article
  14. Article
  15. Review
  16. Review
  17. Article
  18. Article
  19. Divergent effects of itaconate isomers onFrontiers in immunology · 2024
    Article
  20. Metformin improvesFrontiers in immunology · 2024
    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

5 authors at 1 institution in 1 country.

Alexandre GidonCentre of Molecular Inflammation Research, Norwegian University of Science and Technologygrid.5947.f, Trondheim, Norway.
Claire LouetCentre of Molecular Inflammation Research, Norwegian University of Science and Technologygrid.5947.f, Trondheim, Norway.
Lisa Marie RøstDepartment of Biotechnology and Food Science, Faculty of Natural Sciences, Norwegian University of Science and Technologygrid.5947.f, Trondheim, Norway.
Per BruheimDepartment of Biotechnology and Food Science, Faculty of Natural Sciences, Norwegian University of Science and Technologygrid.5947.f, Trondheim, Norway.
Trude Helen FloCentre of Molecular Inflammation Research, Norwegian University of Science and Technologygrid.5947.f, Trondheim, Norway.ORCID 0000-0002-2569-0381
Norwegian University of Science and Technology · NO

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Macrophages sense and respond to pathogens by induction of antimicrobial and inflammatory programs to alert other immune cells and eliminate the infectious threat. We have previously identified the transcription factor IRF1 to be consistently activated in macrophages during Mycobacterium avium infection, but its precise role during infection is not clear. Here, we show that tumor necrosis factor alpha (TNF-α) and interleukin 6 (IL-6) autocrine/paracrine signaling contributes to controlling the intracellular growth of M. avium in human primary macrophages through activation of IRF1 nuclear translocation and expression of IRG1, a mitochondrial enzyme that produces the antimicrobial metabolite itaconate. Small interfering RNA (siRNA)-mediated knockdown of IRF1 or IRG1 increased the mycobacterial load, whereas exogenously provided itaconate was bacteriostatic at high concentrations. While the overall level of endogenous itaconate was low in M. avium-infected macrophages, the repositioning of mitochondria to M. avium phagosomes suggests a mechanism by which itaconate can be delivered directly to M. avium phagosomes in sufficient quantities to inhibit growth. Using mRNA hybridization, we further show that uninfected bystander cells actively contribute to the resolution of infection by producing IL-6 and TNF-α, which, via paracrine signaling, activate IRF1/IRG1 and strengthen the antimicrobial activity of infected macrophages. This mechanism contributes to the understanding of why patients on anti-inflammatory treatment, e.g., with tocilizumab or infliximab, can be more susceptible to mycobacterial disease.

Indexed as

Carboxy-LyasesCells, CulturedHumansImmunity, InnateInterferon Regulatory Factor-1Interleukin-6MacrophagesMycobacterium aviumParacrine CommunicationTuberculosisTumor Necrosis Factor-alphaACOD1 protein, humanCarboxy-LyasesInterferon Regulatory Factor-1Interleukin-6IRF1 protein, humanTumor Necrosis Factor-alphahuman primary macrophagesIL-6innate immunityIRF1IRG1itaconateMycobacterium avium infectionTNF-α

Identifiers

PMID34607464
PMCPMC8546851
OpenAlexW3202566554

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.