Emerging Roles of Adenosine Metabolism in Astrocytes During Brain Injury.

Area of Science:

• Neuroscience
• Immunology
• Metabolic pathways

Background:

• Adenosine is vital for brain regulation and immunity.
• Post-stroke, an immunosuppressive microenvironment rich in adenosine forms.
• The adenosine pathway is a critical target for stroke immunotherapy.

Purpose of the Study:

• Address knowledge gaps in adenosine therapy for stroke.
• Summarize adenosine metabolism networks (extracellular and intracellular).
• Highlight astrocyte adenosine metabolism and purine-converting enzymes as therapeutic targets for cerebral ischemic stroke.

Main Methods:

• Comprehensive review of research over the past two decades.
• Analysis of adenosine metabolic networks, enzymes, and subcellular pathways.
• Examination of astrocyte metabolism dynamics and purine-converting enzyme roles in cerebral ischemic stroke.
• Review of limitations in current adenosine-related therapies and knowledge gaps.

Main Results:

• Extracellular adenosine increases post-stroke, creating an immunosuppressive environment.
• Current therapies targeting P2Y receptors have limitations, such as bleeding risks.
• Key knowledge gaps include cell type-specific regulation and compartmentalized adenosine metabolism.
• Astrocyte adenosine metabolism changes dynamically during brain injury; purine-converting enzymes show therapeutic potential.

Conclusions:

• Adenosine metabolism is a complex integrated network.
• Dynamic astrocyte metabolism and purine-converting enzymes are critical for adenosine-based stroke therapies.
• Addressing knowledge gaps is essential for successful clinical translation of adenosine therapy for stroke.