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Adenosine: does it have a neuroprotective role after all?
A de Mendonça1, A M Sebastião, J A Ribeiro
1Laboratory of Neurosciences, Faculty of Medicine of Lisbon, Av. Professor Egas Moniz, 1649-035, Lisbon, Portugal. mendonca@neurociencias.pt
Brain Research. Brain Research Reviews
|September 30, 2000
Summary
Adenosine, often considered neuroprotective, can surprisingly cause neuronal damage. Understanding adenosine receptor subtypes and administration timing is key to harnessing its therapeutic potential.
Area of Science:
- Neuroscience
- Pharmacology
Background:
- Adenosine is widely presumed to possess neuroprotective properties.
- Emerging evidence suggests adenosine can paradoxically promote neuronal damage and death in specific contexts.
Purpose of the Study:
- To explore the dual role of adenosine in neuronal health and damage.
- To identify factors contributing to adenosine's opposing effects.
Main Methods:
- Review of recent studies on adenosine receptor subtypes.
- Analysis of interactions between adenosine receptors.
- Examination of adenosine's differential effects on neuronal and glial cells.
- Consideration of timing in adenosinergic compound administration.
Main Results:
- Adenosine's dual role is linked to distinct adenosine receptor subtype activation.
- Interactions between receptor subtypes influence adenosine's effects.
- Differential actions on neurons and glial cells contribute to its complex role.
- The timing of administration significantly impacts adenosine's neuroprotective or neurotoxic outcomes.
Conclusions:
- The seemingly contradictory effects of adenosine stem from complex receptor interactions and cell-specific actions.
- A comprehensive understanding of these factors is crucial for developing effective adenosine-based neuroprotective therapies.
- Adenosine remains a promising therapeutic target for neurological conditions when its multifaceted actions are properly considered.