Modulation of P2X Receptors: Emerging Implications for Cellular Signaling and Disease Management

A special issue of Cells (ISSN 2073-4409).

Deadline for manuscript submissions: 30 September 2025 | Viewed by 670

Special Issue Editors


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Guest Editor
Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
Interests: inflammation; immunology; immunopharmacology; inflammatory bowel diseases; purinergic system

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Guest Editor
Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Italy
Interests: inflammatory bowel diseases; purinergic receptors; intestinal epithelial barrier; enteric nervous system

Special Issue Information

Dear Colleagues,

The purinergic pathway plays a key role in the regulation of body homeostasis at a cellular level, being implicated in cellular proliferation, differentiation, death, and regeneration, as well as being known to be involved in more complex processes such as pain, inflammation, immune responses, and endothelial vasodilatation.

Therefore, the aberrant activation of this signaling is associated with the onset of several disorders, including chronic pain, epilepsy, Alzheimer's disease, cancer, diabetes, and cardiovascular dysfunctions.

This Special Issue aims to highlight recent advances in the functions of purinergic receptors (comprising both P1 and P2 receptors) in both physiological and pathological status, with a central focus on the underlying molecular mechanisms. We will delve into the possibility of modulating these receptors as an innovative therapeutic option to manage different pathological conditions, trying to elucidate the benefits and risks of this strategy by analyzing studies conducted on cell lines, animal models, and humans.

Dr. Luca Antonioli
Dr. Clelia Di Salvo
Guest Editors

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Keywords

  • purinergic receptors
  • purinergic signaling
  • adenosine
  • ATP
  • ADP

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Published Papers (1 paper)

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Research

16 pages, 2769 KiB  
Article
Differential Effects of Hearing Loss Mutations in Homomeric P2X2 and Heteromeric P2X2/3 Receptors
by Paula-Luise Wand, Xenia Brünings, Debanjan Tewari, Stefanie Reuter, Ralf Mrowka, Klaus Benndorf, Thomas Zimmer and Christian Sattler
Cells 2025, 14(7), 510; https://doi.org/10.3390/cells14070510 - 29 Mar 2025
Viewed by 327
Abstract
P2X receptors are unspecific cation channels activated by ATP. They are expressed in various tissues and found in neuronal and immune cells. In mammals, seven subunits are described, which can assemble into homomeric and heteromeric trimers. P2X2 receptors play important roles in cochlear [...] Read more.
P2X receptors are unspecific cation channels activated by ATP. They are expressed in various tissues and found in neuronal and immune cells. In mammals, seven subunits are described, which can assemble into homomeric and heteromeric trimers. P2X2 receptors play important roles in cochlear adaptation to elevated sound levels. Three mutations causing inherited progressive hearing loss have been identified. These mutations localize to the transmembrane domain 1 (V60L), the transmembrane domain 2 (G353R) and a β-sheet linking the ATP binding site to the pore (D273Y). Herein, mutations were studied in human homomeric P2X2 as well as in heteromeric P2X2/3 receptors. We measured their binding of a fluorescently labeled ATP derivative (fATP) and characterized the constructs using the patch-clamp technique. The conclusions from our results are as follows: 1. The mutations V60L and G353R show robust localization on the plasma membrane and binding of fATP, whereas the mutant D273Y has no binding to fATP. 2. The mutation V60L has an increased affinity to fATP compared with the wildtype. 3. The expression of hP2X2 V60L channels reduces cell viability, which may support its role in the pathogenesis of hearing loss. 4. All mutant P2X2 subunits can assemble into P2X2/3 heteromeric channels with distinct phenotypes. Full article
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