P2X7 Receptor Orchestrates Multiple Signalling Pathways Triggering Inflammation, Autophagy and Metabolic/Trophic Responses

Area of Science:

• Biochemistry
• Immunology
• Oncology

Background:

• The P2X7 receptor is an ion channel activated by extracellular adenosine triphosphate (eATP).
• It is increasingly recognized for its roles in immune reactions, neurobiology, and oncology.
• P2X7 activation initiates intracellular signaling via ion permeability changes, pore formation, and protein interactions.

Purpose of the Study:

• To provide an overview of the main biochemical pathways triggered by P2X7 receptor activation.
• To review recent and established literature on P2X7-mediated signaling cascades.
• To cover P2X7-activated pathways involved in cell death, inflammation, immune response, proliferation, and metabolism.

Main Methods:

• Literature review of established and recent research.
• Analysis of P2X7-triggered signaling cascades.
• Focus on key pathways including inflammasome/NF-kB, apoptosis, autophagy, pyroptosis, and proliferation.

Main Results:

• P2X7 activation leads to diverse cellular responses including cell death, inflammation, and immune activation.
• Key pathways discussed include NF-kB, pro-apoptotic signaling, and emerging pathways like autophagy (beclin-1/LC3-II) and pyroptosis (caspase-11).
• P2X7 also modulates proliferation and metabolism through axes like Akt and VEGF.

Conclusions:

• The P2X7 receptor is a critical regulator of multiple cellular processes.
• Understanding P2X7 signaling is crucial for developing therapeutic strategies in immunology and oncology.
• Further research into emerging P2X7 pathways will enhance our knowledge of its complex roles.