Cited by 280Adenosine and Purinergic SignalingCalcium signaling and nucleotide metabolismIon Channels and Receptors

The Elusive P2X7 Macropore

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Di Virgilio, Francesco, Schmalzing, Günther, Markwardt, Fritz·2018·Trends in Cell Biology

Abstract

ATP, which is released under pathological conditions and is considered a damage-associated molecular pattern (DAMP), activates P2X7 receptors (P2X7Rs), trimeric plasma membrane ion channels selective for small cations. P2X7Rs are partners in NOD-like receptor containing a pyrin (NLRP3) inflammasome activation and promoters of tumor cell growth. P2X7R overstimulation triggers the ATP-dependent opening of a nonselective plasma membrane pore, known as a 'macropore', which allows fluxes of large hydrophilic molecules. The pathophysiological functions of P2X7R are thought to be dependent on activation of this conductance pathway, yet its molecular identity is unknown. Recent reports show that P2X7R permeability to organic solutes is an early and intrinsic property of the channel itself. A better understanding of P2X7R-dependent changes in plasma membrane permeability will allow a rationale development of novel anti-inflammatory and anticancer drugs.

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Crossref · 10.1016/j.tcb.2018.01.005

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  • The P2X7 receptor is a trimeric ionotropic receptor with low affinity for ATP (EC50 around 0.3-1.8 mM) and, under prolonged stimulation, can form pores allowing the passage of large hydrophilic molecules.

    “The P2X7 receptor is a trimeric ionotropic receptor that belongs to the P2X family of purinergic receptors, presenting low affinity for ATP (EC50 around 0.3–1.8 mM) and, under prolonged stimulation, can form pores allowing the passage of large hydrophilic molecules [62–64].”

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Authors
Di Virgilio, F., Schmalzing, G., & Markwardt, F.
Affiliations
RWTH Aachen University (DE)
Venue
Trends in Cell Biology
Publisher
Elsevier BV
Published
2018-05
Volume
28
Issue
5
Pages
392-404
ISSN
0962-8924 (ISSN-L)
OpenAlex
W2787249947
Cited by
279
References
96
Citations by year
2026: 23 · 2025: 22 · 2024: 41 · 2023: 44 · 2022: 31 · 2021: 30 · 2020: 33 · 2019: 37 · 2018: 17
FWCI
3.44
Type
journal article
Language
en
Open access
Locations
  • Trends in Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
  • RWTH Publications (RWTH Aachen) (submittedVersion)
  • Institutional Research Information System University of Ferrara (University of Ferrara) (submittedVersion, cc-by-nc-nd)
Funders
  • Italian Association for Cancer Research (13025, 18581)
  • Ministry of Health of Italy (RF-2011-02348435)
  • University of Ferrara
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Adenosine and Purinergic Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
Keywords
P2X7 receptor, ATP, plasma membrane permeability, NLRP3 inflammasome, damage-associated molecular patterns, ion channel conductance, anti-inflammatory agents, anticancer agents
MeSH terms
Alarmins, NLR Family, Pyrin Domain-Containing 3 Protein, Adenosine Triphosphate, Cell Membrane Permeability, Humans, Neoplasms, Signal Transduction, Cell Proliferation, Receptors, Purinergic P2X7, Inflammasomes

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