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✦   LIBER   ✦

Pharmacological modulation of adenosine system: Novel options for treatment of inflammatory bowel diseases

✍ Scribed by Luca Antonioli; Matteo Fornai; Rocchina Colucci; Narcisa Ghisu; Marco Tuccori; Mario Del Tacca; Corrado Blandizzi


Book ID
102266007
Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
189 KB
Volume
14
Category
Article
ISSN
1078-0998

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✦ Synopsis


Inflammatory bowel diseases (IBDs) are chronic disorders resulting from abnormal and persistent immune responses which lead to severe tissue injury and disturbances in digestive motor/secretory functions. At present, pharmacotherapy represents the cornerstone for the management of IBDs, and recent advances in understanding the immunopathogenesis of intestinal inflammation suggest the adenosine system as an attractive target for development of novel drugs against gut inflammatory disorders. Consistent evidence indicates that adenosine plays a relevant role in the regulation of immune system via interaction with specific cell-membrane G-protein-coupled receptors (A 1 , A 2a , A 2b , and A 3 ). Moreover, this nucleoside is implicated in the control of enteric neurotransmission and gut motor functions. In the presence of inflammation, the adenosine system acts as a sensible sensor apparatus, which, through dynamic modifications in the expression of ecto-enzymes and purinergic receptors, adapts its metabolism to tissue health status and contributes to the mechanisms deputed to the protection of tissues against inflammatory injuries. In keeping with these concepts, it is becoming increasingly appreciated that drugs targeted on adenosine receptors or enzymes responsible for adenosine catabolism can exert beneficial effects on experimental models of intestinal inflammation. This review aims to discuss the role of adenosine in the regulation of enteric immune responses and gut neuromuscular functions in the presence of inflammation, as well as to highlight the mechanisms through which the pharmacological modulation of adenosine pathways may have potential applications for the therapeutic management of IBDs.


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