Abstract:
:Chronic infection with hepatitis C virus (HCV) is a major global health burden and is associated with an increased risk of liver cirrhosis and hepatocellular carcinoma. Current therapy for HCV infection has limited efficacy, particularly against genotype 1 virus, and is hampered by a range of adverse effects. Therefore, there is a clear unmet medical need for efficacious and safe direct antiviral drugs for use in combination with current treatments to increase cure rates and shorten treatment times. The broad genotypic coverage achievable with nucleosides or nucleotides and the high genetic barrier to resistance of these compounds observed in vitro and in vivo suggest that this class of inhibitors could be a valuable component of future therapeutic regimens. Here, we report the in vitro inhibitory activity and mode of action of 2'-deoxy-2'-spirocyclopropylcytidine (TMC647078), a novel and potent nucleoside inhibitor of the HCV NS5B RNA-dependent RNA polymerase that causes chain termination of the nascent HCV RNA chain. In vitro combination studies with a protease inhibitor resulted in additive efficacy in the suppression of HCV RNA replication, highlighting the potential for the combination of these two classes in the treatment of chronic HCV infection. No cytotoxic effects were observed in various cell lines. Biochemical studies indicated that TMC647078 is phosphorylated mainly by deoxycytidine kinase (dCK) without inhibiting the phosphorylation of the natural substrate, and high levels of triphosphate were observed in Huh7 cells and in primary hepatocytes in vitro. TMC647078 is a potent novel nucleoside inhibitor of HCV replication with a promising in vitro virology and biology profile.
journal_name
Antimicrob Agents Chemotherjournal_title
Antimicrobial agents and chemotherapyauthors
Berke JM,Vijgen L,Lachau-Durand S,Powdrill MH,Rawe S,Sjuvarsson E,Eriksson S,Götte M,Fransen E,Dehertogh P,Van den Eynde C,Leclercq L,Jonckers TH,Raboisson P,Nilsson M,Samuelsson B,Rosenquist Å,Fanning GC,Lin TIdoi
10.1128/AAC.00214-11subject
Has Abstractpub_date
2011-08-01 00:00:00pages
3812-20issue
8eissn
0066-4804issn
1098-6596pii
AAC.00214-11journal_volume
55pub_type
杂志文章abstract::A novel algorithm designed for the screening of carbapenemase-producing Enterobacteriaceae (CPE), based on faropenem and temocillin disks, was compared to that of the Committee of the Antibiogram of the French Society of Microbiology (CA-SFM), which is based on ticarcillin-clavulanate, imipenem, and temocillin disks. ...
journal_title:Antimicrobial agents and chemotherapy
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doi:10.1128/AAC.00971-07
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