Abstract:
:The 'omnipresence' of adenosine in all nervous system cells (neurons and glia) together with the intensive release of adenosine following insults, makes adenosine as a sort of 'maestro' of synapses leading to the homeostatic coordination of brain function. Besides direct actions of adenosine on the neurosecretory mechanisms, where adenosine operates to tune neurotransmitter release, receptor-receptor interactions as well as interplays between adenosine receptors and transporters occur as part of the adenosine's attempt to fine tuning synaptic transmission. This review will focus on the different ways adenosine can use to trigger or brake the action of several neurotransmitters and neuromodulators. Adenosine receptors cross talk with other G protein coupled receptors (GPCRs), with ionotropic receptors and with receptor kinases. Most of these interactions occur through A2A receptors, which in spite their low density in some brain areas, such as the hippocampus, may function as metamodulators. Tonic adenosine A2A receptor activity is a required step to allow synaptic actions of neurotrophic factors, namely upon synaptic transmission at both pre- and post-synaptic level as well as upon synaptic plasticity and neuronal survival. The implications of these interactions in normal brain functioning and in neurologic and psychiatric dysfunction will be discussed.
journal_name
Curr Neuropharmacoljournal_title
Current neuropharmacologyauthors
Sebastião AM,Ribeiro JAdoi
10.2174/157015909789152128subject
Has Abstractpub_date
2009-09-01 00:00:00pages
180-94issue
3eissn
1570-159Xissn
1875-6190journal_volume
7pub_type
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更新日期:2016-01-01 00:00:00
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journal_title:Current neuropharmacology
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更新日期:2011-06-01 00:00:00
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更新日期:2011-09-01 00:00:00
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journal_title:Current neuropharmacology
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更新日期:2011-03-01 00:00:00
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journal_title:Current neuropharmacology
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更新日期:2015-01-01 00:00:00
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journal_title:Current neuropharmacology
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更新日期:2006-04-01 00:00:00
abstract:BACKGROUND:Traumatic brain injury (TBI) constitutes the primary reason for mortality and morbidity in persons worldwide below 45 years of age. 1.7 million Traumatic events occur yearly in the United States alone, considering for 50,000 deaths. In severe traumatic brain injury sufferers, a considerable achievement attai...
journal_title:Current neuropharmacology
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更新日期:2018-01-01 00:00:00
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journal_title:Current neuropharmacology
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abstract::Malignant glioma is the most common and destructive form of primary brain tumor. Along with surgery and radiation, chemotherapy remains as the major treatment modality. The emergence of drug resistance, however, often leads to a therapeutic failure in the treatment of glioma, precluding long-term survival of the patie...
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更新日期:2012-03-01 00:00:00
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abstract::To explore the functional consequences of cannabinoid withdrawal in the rat mesolimbic dopamine system, we investigated the anatomical morphology of the mesencephalic, presumed dopaminergic, neurons and their main post-synaptic target in the Nucleus Accumbens. We found that TH-positive neurons shrink and Golgi-stained...
journal_title:Current neuropharmacology
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更新日期:2011-03-01 00:00:00
abstract::Bacopa monnieri, commonly known as Brahmi, has been extensively used as a neuromedicine for various disorders such as anxiety, depression and memory loss. Chemical characterization studies revealed the major active constituents of the herb as the triterpenoid saponins, bacosides. Bacoside A, the vital neuroprotective ...
journal_title:Current neuropharmacology
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更新日期:2019-01-01 00:00:00