ArticleJournal of immunology (Baltimore, Md. : 1950)2009
P2X7 receptor-stimulated secretion of MHC class II-containing exosomes requires the ASC/NLRP3 inflammasome but is independent of caspase-1.
Article in Journal of immunology (Baltimore, Md. : 1950), 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 94 papers.
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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.
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Who cites it
94 citing papers in PubMed, 158 citations in OpenAlex.
- The P2X4 purinergic receptor controls the autophagy-related release of small extracellular vesicles from mammary cancer cells under hypoxia.Cell communication and signaling : CCS · 2026Article
- Extracellular Vesicles and Purinergic Signaling in Alzheimer's Disease-Joining Forces for Novel Therapeutic Approach.Brain sciences · 2025Review
- Adenosine triphosphate-mediated signaling of P2X7 receptors controls donor extracellular vesicle release and major histocompatibility complex cross-decoration after allotransplantation.American journal of transplantation : official journal of the American Society of Transplantation and the American Society of Transplant Surgeons · 2025Article
- Role of exosomes in gastrointestinal physiology and pathophysiology.Frontiers in immunology · 2025Review
- Comprehensive multiomics analysis identifies PYCARD as a key pyroptosis-related gene in osteoarthritis synovial macrophages.Frontiers in immunology · 2025Article
- The Role of Extracellular Vesicles and Microparticles in Central Nervous System Disorders: Mechanisms, Biomarkers, and Therapeutic Potential.Cellular and molecular neurobiology · 2024Review
- Exosome Cargo in Neurodegenerative Diseases: Leveraging Their Intercellular Communication Capabilities for Biomarker Discovery and Therapeutic Delivery.Brain sciences · 2024Review
- Review
- Exosomes in asthma: Underappreciated contributors to the pathogenesis and novel therapeutic tools.Immunity, inflammation and disease · 2024Review
- The gasdermin family: emerging therapeutic targets in diseases.Signal transduction and targeted therapy · 2024Review
- P2X7 Receptor in Dendritic Cells and Macrophages: Implications in Antigen Presentation and T Lymphocyte Activation.International journal of molecular sciences · 2024Review
- The role of extracellular vesicles in COPD and potential clinical value.Respiratory research · 2024Review
- TheFrontiers in immunology · 2024Article
- Role of Extracellular Vesicles in Immunity and Host Defense.Immunological investigations · 2024Review
- P2XInternational journal of molecular sciences · 2023Review
- Pyroptosis in neutrophils: Multimodal integration of inflammasome and regulated cell death signaling pathways.Immunological reviews · 2023Review
- Plasma derived extracellular vesicle biomarkers of microglia activation in an experimental stroke model.Journal of neuroinflammation · 2023Article
- Article
- Extracellular Vesicles' Role in the Pathophysiology and as Biomarkers in Cystic Fibrosis and COPD.International journal of molecular sciences · 2022Review
- Exosome biogenesis: machinery, regulation, and therapeutic implications in cancer.Molecular cancer · 2022Review
34 more citing papers are in PubMed but not listed here.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 1 country.
Funding
Abstract
We recently reported that P2X7 receptor (P2X7R)-induced activation of caspase-1 inflammasomes is accompanied by release of MHC class II (MHC-II) protein into extracellular compartments during brief stimulation of murine macrophages with ATP. Here we demonstrate that MHC-II containing membranes released from macrophages or dendritic cells (DCs) in response to P2X7R stimulation comprise two pools of vesicles with distinct biogenesis: one pool comprises 100- to 600-nm microvesicles derived from direct budding of the plasma membrane, while the second pool is composed of 50- to 80-nm exosomes released from multivesicular bodies. ATP-stimulated release of MHC-II in these membrane fractions is observed within 15 min and results in the export of approximately 15% of the total MHC-II pool within 90 min. ATP did not stimulate MHC-II release in macrophages from P2X7R knockout mice. The inflammasome regulatory proteins, ASC (apoptosis-associated speck-like protein containing a caspase-recruitment domain) and NLRP3 (NLR family, pyrin domain containing 3), which are essential for caspase-1 activation, were also required for the P2X7R-regulated release of the exosome but not the microvesicle MHC-II pool. Treatment of bone marrow-derived macrophages with YVAD-cmk, a peptide inhibitor of caspase-1, also abrogated P2X7R-dependent MHC-II secretion. Surprisingly, however, MHC-II release in response to ATP was intact in caspase-1(-/-) macrophages. The inhibitory actions of YVAD-cmk were mimicked by the pan-caspase inhibitor zVAD-fmk and the serine protease inhibitor TPCK, but not the caspase-3 inhibitor DEVD-cho. These data suggest that the ASC/NLRP3 inflammasome complexes assembled in response to P2X7R activation involve protease effector(s) in addition to caspase-1, and that these proteases may play important roles in regulating the membrane trafficking pathways that control biogenesis and release of MHC-II-containing exosomes.
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What OpenQuestion holds
Registered trials
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.