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Related Experiment Videos

Nucleotide receptors

R A North1, E A Barnard

  • 1Geneva Biomedical Research Institute, Glaxo Wellcome Research and Development, 14 chemin des Aulx, Plan-les-Ouates, 1228 Geneva, Switzerland. RAN8881@ggr.co.uk

Current Opinion in Neurobiology
|June 1, 1997
PubMed
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Adenosine triphosphate (ATP) and related nucleotides signal through P2X and P2Y receptors. Research highlights P2X3 in pain sensing and P2X7 in immune cells, while P2Y receptors influence various cellular pathways.

Area of Science:

  • Molecular biology
  • Neuroscience
  • Immunology

Background:

  • Adenosine 5'-triphosphate (ATP) and related nucleotides are crucial signaling molecules.
  • These nucleotides interact with two main receptor families: ionotropic P2X and metabotropic P2Y receptors.
  • P2X receptors form ligand-gated cation channels, while P2Y receptors are G-protein-coupled receptors.

Purpose of the Study:

  • To review the roles and characteristics of P2X and P2Y receptors.
  • To highlight recent findings regarding P2X subunit function, particularly P2X3 and P2X7.
  • To discuss the signaling mechanisms and pharmacological classification of P2Y receptors.

Main Methods:

  • Literature review of recent studies on purinergic signaling.
  • Analysis of structural and functional data for P2X receptor subunits.

Related Experiment Videos

  • Examination of G-protein coupling and downstream effects of P2Y receptor activation.

    • Main Results:

    • P2X receptor subunits (P2X1-P2X7) assemble into functional cation channels.
    • P2X3 subunits are implicated in nociceptive sensory neurons, with transmembrane domain 2 crucial for ion permeation.
    • P2X7 subunits, found in macrophages and microglia, form cytolytic pores.
    • P2Y receptors exhibit diverse G-protein coupling, affecting phospholipase C, adenylate cyclase, and ion channels.
    • Pharmacological classification of P2Y receptors requires purified nucleotides due to varying agonist preferences.

    Conclusions:

    • Purinergic signaling via P2X and P2Y receptors is widespread and functionally diverse.
    • Specific P2X subunits have distinct roles in neuronal excitability and immune cell function.
    • Understanding P2Y receptor pharmacology is essential for accurate classification and therapeutic targeting.