Evidence map›Paper›PMID 25422268›Full record

ArticleInfection and immunity2015

Toll-like receptor 2 and NLRP3 cooperate to recognize a functional bacterial amyloid, curli.

Glenn J Rapsinski, Meghan A Wynosky-Dolfi, Gertrude O Oppong, Sarah A Tursi, R Paul Wilson, Igor E Brodsky, Çagla Tükel

Open access · bronzeAbstract read
In one paragraph

Article in Infection and immunity, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 75 papers.

0numbers the graph read from it
0cells of the map it votes in
75citing papers in PubMed
5.2field-weighted citation impact, top 4% 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

75 citing papers in PubMed, 116 citations in OpenAlex.

  1. Article
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  10. Biofilm-associated molecular patterns: BAMPs.Infection and immunity · 2025
    Review
  11. Review
  12. Review
  13. Journal of inflammation research · 2025
    Review
  14. Review
  15. Article
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  19. Article
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15 more citing papers are in PubMed but not listed here.

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

7 authors at 2 institutions in 1 country.

Glenn J RapsinskiDepartment of Microbiology and Immunology, School of Medicine, Temple University, Philadelphia, Pennsylvania, USA.
Meghan A Wynosky-DolfiDepartment of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Gertrude O OppongDepartment of Microbiology and Immunology, School of Medicine, Temple University, Philadelphia, Pennsylvania, USA.
Sarah A TursiDepartment of Microbiology and Immunology, School of Medicine, Temple University, Philadelphia, Pennsylvania, USA.
R Paul WilsonDepartment of Microbiology and Immunology, School of Medicine, Temple University, Philadelphia, Pennsylvania, USA.
Igor E BrodskyDepartment of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
Çagla TükelDepartment of Microbiology and Immunology, School of Medicine, Temple University, Philadelphia, Pennsylvania, USA ctukel@temple.edu.
Temple University · USUniversity of Pennsylvania · US

Funding

Mechanisms of Inflammasome Inhibition by SalmonellaR21AI105346 · NIAID · UNIVERSITY OF PENNSYLVANIA · PI BRODSKY, IGOR E · 2013 to 2014
$440k
The role of curli fibrils in modulating immune responses in the gutR21AI105370 · NIAID · TEMPLE UNIV OF THE COMMONWEALTH · PI TUKEL, CAGLA · 2014 to 2015
$428k
Regulation of intestinal barrier by E. coli curli fibrilsR03AI107434 · NIAID · TEMPLE UNIV OF THE COMMONWEALTH · PI TUKEL, CAGLA · 2013 to 2014
$151k
NIAID NIH HHS 1R03AI107434NIAID NIH HHS 1R21AI105346-01NIAID NIH HHS 1R21AI105370NIAID NIH HHS R03 AI107434NIAID NIH HHS R21 AI105346NIAID NIH HHS R21 AI105370
6 · The paper itself

Abstract

Amyloids are proteins with cross-β-sheet structure that contribute to pathology and inflammation in complex human diseases, including Alzheimer's disease, Parkinson's disease, type II diabetes, and secondary amyloidosis. Bacteria also produce amyloids as a component of their extracellular matrix during biofilm formation. Recently, several human amyloids were shown to activate the NLRP3 inflammasome, leading to the activation of caspase 1 and production of interleukin 1β (IL-1β). In this study, we investigated the activation of the NLRP3 inflammasome by bacterial amyloids using curli fibers, produced by Salmonella enterica serovar Typhimurium and Escherichia coli. Here, we show that curli fibers activate the NLRP3 inflammasome, leading to the production of IL-1β via caspase 1 activation. Investigation of the underlying mechanism revealed that activation of Toll-like receptor 2 (TLR2) by curli fibers is critical in the generation of IL-1β. Interestingly, activation of the NLRP3 inflammasome by curli fibers or by amyloid β of Alzheimer's disease does not cause cell death in macrophages. Overall, these data identify a cross talk between TLR2 and NLRP3 in response to the bacterial amyloid curli and generation of IL-1β as a product of this interaction.

Indexed as

AmyloidAmyloid beta-PeptidesAnimalsBacterial ProteinsBone Marrow CellsCarrier ProteinsCaspase 1Cells, CulturedEscherichia coliInflammasomesInterleukin-1betaMacrophagesMiceMice, Inbred C57BLMice, KnockoutNLR Family, Pyrin Domain-Containing 3 ProteinAmyloidAmyloid beta-PeptidesBacterial ProteinsCarrier ProteinsCaspase 1Crl protein, BacteriaIL1B protein, mouseInflammasomesInterleukin-1betaNLR Family, Pyrin Domain-Containing 3 ProteinNlrp3 protein, mouseTlr2 protein, mouseToll-Like Receptor 2

Identifiers

PMID25422268
PMCPMC4294241
OpenAlexW2156518138

What OpenQuestion holds

Textmetadata
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.