Adenosine A2A receptors and brain injury: Broad spectrum of neuroprotection, multifaceted actions and "fine tuning" modulation

Jiang Fan Chen, Patricia K. Sonsalla, Felicita Pedata, Alessia Melani, Maria Rosaria Domenici, Patrizia Popoli, Jonathan Geiger, Luísa V. Lopes, Alexandre de Mendonça

Research output: Contribution to journalReview articlepeer-review

222 Scopus citations


This review summarizes recent developments that have contributed to understand how adenosine receptors, particularly A2A receptors, modulate brain injury in various animal models of neurological disorders, including Parkinson's disease (PD), stroke, Huntington's disease (HD), multiple sclerosis, Alzheimer's disease (AD) and HIV-associated dementia. It is clear that extracellular adenosine acting at adenosine receptors influences the functional outcome in a broad spectrum of brain injuries, indicating that A2ARs may modulate some general cellular processes to affect neuronal cells death. Pharmacological, neurochemical and molecular/genetic approaches to the complex actions of A2A receptors in different cellular elements suggest that A2A receptor activation can be detrimental or protective after brain insults, depending on the nature of brain injury and associated pathological conditions. An interesting concept that emerges from these studies is A2AR's ability to fine tune neuronal and glial functions to produce neuroprotective effects. While the data presented here clearly highlight the complexity of using adenosinergic agents therapeutically in PD and other neurodegenerative disorders and point out many areas for further inquiry, they also confirm that adenosine receptor ligands, particularly A2A receptor ligands, have many promising characteristics that encourage the pursuit of their therapeutic potential.

Original languageEnglish (US)
Pages (from-to)310-331
Number of pages22
JournalProgress in Neurobiology
Issue number5
StatePublished - Dec 2007
Externally publishedYes


  • Adenosine A receptors
  • Adenosine receptor
  • Caffeine
  • HIV-1-associated dementia
  • Huntington's disease
  • Ischemia
  • Multiple sclerosis
  • Neuroprotection
  • Parkinson's disease
  • Purinergic receptors
  • Stroke

ASJC Scopus subject areas

  • General Neuroscience


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