New potent and selective A(1) adenosine receptor antagonists as potential tools for the treatment of gastrointestinal diseases

作者：Lambertucci Catia; Marucci Gabriella; Dal Ben Diego; Buccioni Michela; Spinaci Andrea; Kachler Sonja; Klotz Karl Norbert; Volpini Rosaria^*

来源：European Journal of Medicinal Chemistry, 2018, 151: 199-213.

DOI：10.1016/j.ejmech.2018.03.067

• Adenosine
• Adenosine receptors
• Adenosine receptor antagonists
• A(1) adenosine receptor
• Purinergic receptors
• Mouse ileum

The synthesis of 9-alkyl substituted adenine derivatives presenting aromatic groups and cycloalkyl rings in 8- and N-6-position, respectively, is reported. The compounds were tested with radioligand binding studies showing, in some cases, a low nanomolar A(1) adenosine receptor affinity and a very good selectivity versus the other adenosine receptor subtypes. Functional assays at human adenosine receptors and at a mouse ileum tissue preparation clearly demonstrate the antagonist profile of these molecules, with inhibitory potency at nanomolar level. A molecular modeling study, consisting in docking analysis at the recently reported A(1) adenosine receptor crystal structure, was performed for the interpretation of the obtained pharmacological results. The N-6-cyclopentyl-9-methyl-8-phenyladenine (17), resulting the most active derivative of the series (K-i = 2.8 nM and IC50 = 14 nM), was also very efficacious in counteracting the effect of the agonist CCPA on mouse ileum contractility. This new compound represents a tool for the development of new agents for the treatment of intestinal diseases as constipation and postoperative ileus.

• 出版日期2018-5-10