Abstract |
Roche Holding AG is developing R-1626, an oral nucleoside inhibitor of HCV RNA polymerase. R-1626 has been demonstrated to be well absorbed and rapidly converted to the active component R-1479. The compound has demonstrated a strong capacity to inhibit HCV replication in vitro and in vivo, without the rapid development of viral resistance. After 4 weeks of treatment with R-1626 in combination with PEG-IFN plus ribavirin in treatment-naïve patients with genotype 1 HCV infection, HCV RNA could no longer be detected in approximately 74% of patients, compared with 5% of patients treated with PEG-IFN plus ribavirin alone, indicating the high potency of R-1626 to induce HCV RNA viral load reductions. R-1626 was generally well tolerated, although severe side effects of neutropenia were observed at high doses. A phase IIb clinical trial was ongoing at the time of publication to test the efficacy of R-1626 in combination with a standard or lower dose of PEG-IFN and ribavirin in HCV genotype 1-infected patients. Given its potent antiviral effect with an apparent high genetic barrier, R-1626 represents an important advancement in improving the outcome of patients with chronic HCV infection.
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Authors | Pierluigi Toniutto, Carlo Fabris, Davide Bitetto, Elisa Fumolo, Ezio Fornasiere, Mario Pirisi |
Journal | IDrugs : the investigational drugs journal
(IDrugs)
Vol. 11
Issue 10
Pg. 738-49
(Oct 2008)
ISSN: 1369-7056 [Print] England |
PMID | 18828074
(Publication Type: Journal Article, Review)
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Chemical References |
- Antiviral Agents
- Enzyme Inhibitors
- Nucleosides
- Prodrugs
- RNA, Viral
- Viral Nonstructural Proteins
- NS-5 protein, hepatitis C virus
- balapiravir
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Topics |
- Administration, Oral
- Animals
- Antiviral Agents
(administration & dosage, therapeutic use)
- Drug Evaluation, Preclinical
- Drug Resistance, Viral
- Drug Therapy, Combination
- Enzyme Inhibitors
(administration & dosage, therapeutic use)
- Hepacivirus
(drug effects, enzymology, genetics)
- Hepatitis C, Chronic
(drug therapy)
- Humans
- Molecular Structure
- Nucleosides
(administration & dosage, adverse effects, pharmacokinetics, therapeutic use)
- Patents as Topic
- Prodrugs
(administration & dosage, adverse effects, pharmacokinetics, therapeutic use)
- RNA, Viral
(blood)
- Structure-Activity Relationship
- Treatment Outcome
- Viral Load
- Viral Nonstructural Proteins
(adverse effects, antagonists & inhibitors, metabolism, pharmacokinetics)
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