Cited by 89Inflammasome and immune disordersImmunodeficiency and Autoimmune DisordersImmune Response and Inflammation

Brief Report: Connecting Two Pathways Through Ca2+ Signaling: NLRP3 Inflammasome Activation Induced by a Hypermorphic PLCG2 Mutation

Open access
Chae, Jae Jin, Park, Yong Hwan, Park, Chung, Hwang, Il‐Young, Hoffmann, Patrycja, Kehrl, John H., Aksentijevich, Ivona, Kastner, Daniel L.·2015·Arthritis & Rheumatology

Abstract

Objective: We previously reported that p.Ser707Tyr, a novel variant in phospholipase Cγ2 (PLCγ2), is the cause of a dominantly inherited autoinflammatory disease, autoinflammation and PLCγ2‐associated antibody deficiency and immune dysregulation (APLAID). The hypermorphic mutation enhances PLCγ2 activity and causes an increase in intracellular Ca 2+ release from endoplasmic reticulum stores. Because increased intracellular Ca 2+ signaling has been associated with NLRP3 inflammasome activation, we studied the role of the NLRP3 inflammasome in the pathogenesis of APLAID. Methods: Human peripheral blood mononuclear cells (PBMCs) were isolated from healthy control subjects and 2 patients with APLAID. Inflammasome activation was analyzed by Western blotting. Intracellular Ca 2+ levels were measured with a FLIPR Calcium 4 assay kit. Results: Cells from the patients had elevated basal levels of intracellular Ca 2+, and the intracellular Ca 2+ flux triggered by extracellular CaCl 2 was substantially enhanced. Patient PBMCs secreted interleukin‐1β in response to lipopolysaccharide priming alone, and this effect was attenuated by treatment with a PLC inhibitor, intracellular Ca 2+ blockers, or an adenylate cyclase activator. Conclusion: Our findings suggest that the inflammation in patients with APLAID is partially driven by activation of the NLRP3 inflammasome. These data link 2 seemingly distinct molecular pathways and provide new insights into the pathogenesis of APLAID and autoinflammation.

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1002/art.38961

Cites

12 of 12 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

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?

  • IP3 triggers calcium release and DAG activates PKC and other effector proteins, influencing microglial processes such as migration, phagocytosis, cytokine secretion, and metabolic responses.

    “IP3 triggers calcium release from intracellular stores, while DAG activates protein kinase C (PKC) and other effector proteins, ultimately influencing microglial processes such as migration, phagocytosis, cytokine secretion, and metabolic responses. 13 , 16 , 17”

    From Alzheimer's disease–associated PLCG2 variants alter microglial state and function in human induced pluripotent stem cell–derived microglia‐like cells (2025) · cites this paper as [16]

    The Introduction (page unavailable) states that InsP3 releases calcium from ER stores and identifies DAG as another product of PLCγ2. The Discussion (page unavailable) says PLCγ2 signaling includes PKC, but does not specifically link DAG to PKC or address other effector proteins. The Results concern IL-1β secretion from human PBMCs, not migration, phagocytosis, cytokine secretion, or metabolic responses in microglia. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • PLCγ2 activation leads to an increase in cytoplasmic calcium, that supports the assembly of the NLRP3 inflammasome, and pro-inflammatory cytokine release in human blood monocytes, bone-marrow-derived macrophages and dendritic cells.

    “PLCγ2 activation leads to an increase in cytoplasmic calcium, that supports the assembly of the pyrin (PYD)-domain-containing protein 3 (NLRP3) inflammasome, and pro-inflammatory cytokine release in human blood monocytes [31], bone-marrow-derived macrophages (BMDM) and dendritic cells [32].”

    From TREM2/PLCγ2 signalling in immune cells: function, structural insight, and potential therapeutic modulation (2021) · cites this paper as [31]

    The Results (page unavailable) link PLC-mediated calcium signaling to NLRP3 activation and IL-1β secretion in human peripheral blood mononuclear cells (PBMCs). The Methods (page unavailable) confirm that PBMCs, not isolated blood monocytes, were studied, so the claim is more cell-specific than this source supports. The macrophage and dendritic-cell portion is attached to a different citation [32] and is not assessed here. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • DAG leads to activation of protein kinase C (PKC) isozymes, the NLRP3 inflammasome, as well as other proteins.

    “and DAG leading to activation of protein kinase C (PKC) isozymes, the NLRP3 inflammasome [31, 34], as well as other proteins [77].”

    From TREM2/PLCγ2 signalling in immune cells: function, structural insight, and potential therapeutic modulation (2021) · cites this paper as [31]

    The Introduction says PLCγ2 produces DAG and InsP3, and the Discussion says PLCγ2 can trigger protein kinase C signaling. The Results link NLRP3 inflammasome activation to the PLC–InsP3–Ca2+ pathway, not to DAG; the paper therefore does not support the claimed DAG-to-NLRP3 link. Page numbers are unavailable in our copy. (LLM, conf=0.87)

    Experimental — accuracy not yet measured
  • A significant gain of function of PLCγ2 can lead to deleterious impacts on the immune system.

    “These clearly indicate that a significant gain of function of PLCγ2 can lead to deleterious impacts on the immune system.”
  • Blood mononuclear cells from APLAID patients secreted increased levels of IL-1β.

    “The inflammation found in APLAID has partially been attributed to the activation of the NLRP3 inflammasome as patient’s blood mononuclear cells secreted increased levels of IL-1β (109).”

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Chae, J. J., Park, Y. H., Park, C., Hwang, I., Hoffmann, P., Kehrl, J. H., Aksentijevich, I., & Kastner, D. L.
Affiliations
  • National Institutes of Health (US)
  • National Institute of Allergy and Infectious Diseases (US)
Venue
Arthritis & Rheumatology
Publisher
Wiley
Published
2015-01-28
Volume
67
Issue
2
Pages
563-567
ISSN
  • 2326-5191 (ISSN-L)
  • 2326-5205
OpenAlex
W1545536889
Cited by
89
References
12
Citations by year
2026: 5 · 2025: 7 · 2024: 5 · 2023: 8 · 2022: 10 · 2021: 12 · 2020: 15 · 2019: 8 · 2018: 9 · 2017: 6 · 2016: 2 · 2015: 2
FWCI
1.37
Type
journal article
Language
en
Open access
Locations
  • Arthritis & Rheumatology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (Z99 HG999999)
  • National Human Genome Research Institute
  • National Institute of Allergy and Infectious Diseases
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Inflammasome and immune disorders
  • Life Sciences › Immunology and Microbiology › Immunology › Immunodeficiency and Autoimmune Disorders
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
Keywords
NLRP3 inflammasome, autoinflammatory disease, intracellular calcium signaling, endoplasmic reticulum calcium release, interleukin-1β secretion, lipopolysaccharide, PLCγ2, adenylate cyclase, peripheral blood mononuclear cells
MeSH terms
NLR Family, Pyrin Domain-Containing 3 Protein, Calcium, Calcium Channel Blockers, Carrier Proteins, Endoplasmic Reticulum, Humans, Immunologic Deficiency Syndromes, Immune System Diseases, Leukocytes, Mononuclear, Lipopolysaccharides, Mutation, Signal Transduction, Case-Control Studies, Calcium Signaling, Phospholipase C gamma, Interleukin-1beta, Inflammasomes

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