Cited by 1,445Inflammasome and immune disordersImmune Response and InflammationCell death mechanisms and regulation

Activation of the NALP3 inflammasome is triggered by low intracellular potassium concentration

Pétrilli, V, Papin, S, Dostert, C, Mayor, A, Martinon, F, Tschopp, J·2007·Cell Death & Differentiation

Abstract

Inflammasomes are Nod-like receptor(NLR)- and caspase-1-containing cytoplasmic multiprotein complexes, which upon their assembly, process and activate the proinflammatory cytokines interleukin (IL)-1beta and IL-18. The inflammasomes harboring the NLR members NALP1, NALP3 and IPAF have been best characterized. While the IPAF inflammasome is activated by bacterial flagellin, activation of the NALP3 inflammasome is triggered not only by several microbial components, but also by a plethora of danger-associated host molecules such as uric acid. How NALP3 senses these chemically unrelated activators is not known. Here, we provide evidence that activation of NALP3, but not of the IPAF inflammasome, is blocked by inhibiting K(+) efflux from cells. Low intracellular K(+) is also a requirement for NALP1 inflammasome activation by lethal toxin of Bacillus anthracis. In vitro, NALP inflammasome assembly and caspase-1 recruitment occurs spontaneously at K(+) concentrations below 90 mM, but is prevented at higher concentrations. Thus, low intracellular K(+) may be the least common trigger of NALP-inflammasome activation.

Integrity signals

Registry

Crossref · 10.1038/sj.cdd.4402195

Cites

38 of 38 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • Lowering intracellular K+ through efflux is required for Nalp3 activation by every known activator, including MSU.

    “In favour of the latter assumption is the recent finding that potassium (K + ) efflux, lowering intracellular K + levels, is a requirement for Nalp3 inflammasome activation triggered by all known activators including MSU (13)(14)(15).”
  • Published findings indicate that ROS help activate caspase-1 after ATP treatment and contribute to Nalp3 activation by MSU and R837.

    “Recent data also suggest a role for ROS in activating caspase-1 upon ATP treatment (18) and in Nalp3 inflammasome activation by MSU and R837 (13).”
  • Decreased K+ levels in the cytosolic microenvironment may lead to NLRP3 inflammasome assembly and activation through Nek7 binding, culminating in secretion of IL-1β and IL-18.

    “Decreased K+ levels in the cytosolic microenvironment may lead to NLRP3 inflammasome assembly and activation through NIMA-related serine/threonine kinase 7 (Nek7) binding, which culminates in the secretion of inflammatory cytokines, such as IL-1β and IL-18 [151,152]”

    From P2X7 Receptor Signaling in Stress and Depression (2019) · cites this paper as [152]

  • Inhibition of K+ efflux by high extracellular K+ concentrations prevents NLRP3-dependent caspase 1 activation in response to ATP, asbestos, silica and MSU crystals.

    “Consistently, inhibition of K+ efflux by high extracellular K+ concentrations prevents NLRP3-dependent caspase 1 activation in response to ATP, asbestos, silica and MSU crystals58,66.”

    From Sterile inflammation: sensing and reacting to damage (2010) · cites this paper as [66]

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Pétrilli, V, Papin, S., Dostert, C., Mayor, A., Martinon, F., & Tschopp, J.
Affiliations
  • University of Lausanne (CH)
  • Harvard University (US)
Corresponding author
Tschopp, J
Venue
Cell Death & Differentiation
Published
2007-06-29
Volume
14
Issue
9
Pages
1583-1589
ISSN
  • 1350-9047 (ISSN-L)
  • 1476-5403
OpenAlex
W1978274182
Cited by
1,445
References
38
Citations by year
2026: 36 · 2025: 54 · 2024: 62 · 2023: 71 · 2022: 85 · 2021: 78 · 2020: 102 · 2019: 86 · 2018: 73 · 2017: 104 · 2016: 70 · 2015: 79 · 2014: 90 · 2013: 101 · 2012: 93
FWCI
25.01
Type
journal article
Language
en
Open access
closed
Locations
  • Cell Death and Differentiation (publishedVersion)
  • PubMed (publishedVersion)
  • IRIS (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
Funders
  • National Science Foundation
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
Keywords
NLRP3 inflammasome, potassium efflux, intracellular potassium concentration, caspase-1 activation, inflammasome assembly, NOD-like receptors, damage-associated molecular patterns, uric acid, IL-1β, IL-18
MeSH terms
NLR Family, Pyrin Domain-Containing 3 Protein, Animals, Calcium-Binding Proteins, Carrier Proteins, Cell Line, Humans, Inflammation, Mice, Inbred BALB C, Mice, Inbred C57BL, Potassium, Macrophages, Peritoneal, Caspase 1, Interleukin-18, Apoptosis Regulatory Proteins, Mice, CARD Signaling Adaptor Proteins, Interleukin-1beta

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review