Abstract:
:The adenosine pathway is a powerful evolutionarily selected mechanism aimed at a fine modulation of inflammatory responses and protection of tissues from injuries. Adenosine exerts its modulatory effects via interaction with G protein-coupled receptors, designated as A(1), A(2A), A(2B) and A(3). In this regard, extracellular adenosine concentrations are critical in determining its ability of regulating several biological functions. The levels achieved by adenosine in close proximity of its receptors are strictly regulated by a variety of dynamic mechanisms, including intracellular and extracellular biosynthesis, transport and metabolism, based on tissue energy status. In this context, the catabolic enzyme adenosine deaminase (ADA) represents a critical checkpoint in the regulation of extracellular adenosine levels and, consequently, in the control of receptor stimulation, thus playing a pivotal role in the modulation of purinergic responses to several pathophysiological events, such as chronic pulmonary diseases, rheumatoid arthritis, inflammatory bowel diseases and sepsis. This article reviews current data on the role played by ADA in the regulation of immune system activity through its modulation of adenosine pathways. Particular attention has been paid to the involvement of ADA in the pathophysiology of relevant inflammatory diseases. In addition, the interest in designing and developing novel ADA inhibitors, as new tools potentially useful for the therapeutic management of inflammatory disorders, has been discussed.
journal_name
Curr Drug Targetsjournal_title
Current drug targetsauthors
Antonioli L,Colucci R,La Motta C,Tuccori M,Awwad O,Da Settimo F,Blandizzi C,Fornai Mdoi
10.2174/138945012800564095subject
Has Abstractpub_date
2012-06-01 00:00:00pages
842-62issue
6eissn
1389-4501issn
1873-5592pii
CDT-EPUB-20120117-002journal_volume
13pub_type
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