P2X receptors as cell-surface ATP sensors in health and disease

Area of Science:

• Molecular biology
• Neuroscience
• Cell biology

Background:

• P2X receptors are ion channels activated by extracellular adenosine triphosphate (ATP).
• Historically, their function was mainly associated with the autonomic nervous system.
• Emerging evidence suggests broader roles in physiological processes.

Purpose of the Study:

• To review the expanding functional significance of P2X receptors.
• To highlight novel roles in afferent signaling and chronic pain.
• To discuss their involvement in endothelial and epithelial cell autocrine signaling.

Main Methods:

• Literature review of recent studies on P2X receptor function.
• Analysis of P2X receptor molecular architecture.
• Examination of unique functional properties of P2X channels.

Main Results:

• P2X receptors play key roles in afferent nerve signaling.
• They are implicated in the mechanisms underlying chronic pain.
• Autocrine signaling roles in endothelial and epithelial cells are increasingly recognized.
• P2X receptors possess a distinct molecular structure and unique channel properties.

Conclusions:

• P2X receptor functions extend significantly beyond the autonomic nervous system.
• Their involvement in pain and cellular signaling underscores their therapeutic potential.
• The unique structure and properties of P2X receptors warrant further investigation.