Bioorganic and Medicinal Chemistry p. 3091 - 3107 (2008)
Update date:2022-07-29
Topics:
Maugeri, Caterina
Alisi, Maria A.
Apicella, Claudia
Cellai, Luciano
Dragone, Patrizia
Fioravanzo, Elena
Florio, Saverio
Furlotti, Guido
Mangano, Giorgina
Ombrato, Rosella
Luisi, Renzo
Pompei, Raffaello
Rincicotti, Vito
Russo, Vincenzo
Vitiello, Marco
Cazzolla, Nicola
Human Rhinovirus (HRV) is the most important aetiologic agent of common cold in adults and children. HRV is a single-stranded, positive sense RNA virus and, despite the high level of conservation among different serotypes, sequence alignment of viral protease 3C with mammalian protease reveals no homology. Thus, protease 3C is an optimal target for the development of anti-HRV agents. In the present work we investigated the design, the synthesis and the development of new potential reversible inhibitors against HRV protease 3C. Docking studies on the crystallized structure of HRV2 protease 3C led us to the design and the synthesis of a series of 3,5 disubstituted benzamides able to act as analogues of the substrate. We also developed 1,3,5 trisubstituted benzamides where aromatic substitutions on the aryl ring led us to investigate the importance of π-π interaction on the stabilization of protease 3C-inhibitor complex. All structures were tested for enzymatic inhibition on HRV14 protease 3C. Results highlighted the inhibitory activity of compounds 13, 14, and 20 (91%, 81%, and 85% at 10 μM, respectively), with the latter exhibiting an ID50 (dose that inhibits 50% of the viral cytopathic effect) on HRV-14 = 25 μg/ml.
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