PMID- 23856779 OWN - NLM STAT- MEDLINE DCOM- 20140409 LR - 20211021 IS - 1098-6596 (Electronic) IS - 0066-4804 (Print) IS - 0066-4804 (Linking) VI - 57 IP - 10 DP - 2013 Oct TI - Antiviral effect, safety, and pharmacokinetics of five-day oral administration of Deleobuvir (BI 207127), an investigational hepatitis C virus RNA polymerase inhibitor, in patients with chronic hepatitis C. PG - 4727-35 LID - 10.1128/AAC.00565-13 [doi] AB - Deleobuvir (BI 207127) is an investigational oral nonnucleoside inhibitor of hepatitis C virus (HCV) NS5B RNA polymerase. Antiviral activity, virology, pharmacokinetics, and safety were assessed in HCV genotype 1-infected patients receiving 5 days' deleobuvir monotherapy. In this double-blind phase 1b study, treatment-naive (TN; n = 15) and treatment-experienced (TE; n = 45) patients without cirrhosis received placebo or deleobuvir at 100, 200, 400, 800, or 1,200 mg every 8 h (q8h) for 5 days. Patients with cirrhosis (n = 13) received deleobuvir at 400 or 600 mg q8h for 5 days. Virologic analyses included NS5B genotyping and phenotyping of individual isolates. At day 5, patients without cirrhosis had dose-dependent median HCV RNA reductions of up to 3.8 log10 (with no placebo response); patients with cirrhosis had median HCV RNA reductions of approximately 3.0 log10. Three patients discontinued due to adverse events (AEs). The most common AEs were gastrointestinal, nervous system, and skin/cutaneous tissue disorders. Plasma exposure of deleobuvir was supraproportional at doses >/= 400 mg q8h and approximately 2-fold higher in patients with cirrhosis than in patients without cirrhosis. No virologic breakthrough was observed. NS5B substitutions associated with deleobuvir resistance in vitro were detected in 9/59 patients; seven encoded P495 substitutions, including P495L, which conferred 120- to 310-fold-decreased sensitivity to deleobuvir. P495 variants did not persist in follow-up without selective drug pressure. Deleobuvir monotherapy was generally well tolerated and demonstrated dose-dependent antiviral activity against HCV genotype 1 over 5 days. FAU - Larrey, Dominique AU - Larrey D AD - Departement d'Hepato-Gastroenterologie, Hopital Saint Eloi, Montpellier, France. FAU - Lohse, Ansgar W AU - Lohse AW FAU - Trepo, Christian AU - Trepo C FAU - Bronowicki, Jean-Pierre AU - Bronowicki JP FAU - Arasteh, Keikawus AU - Arasteh K FAU - Bourliere, Marc AU - Bourliere M FAU - Calleja, Jose Luis AU - Calleja JL FAU - Stern, Jerry O AU - Stern JO FAU - Nehmiz, Gerhard AU - Nehmiz G FAU - Abdallah, Nasri AU - Abdallah N FAU - Berger, Kristi L AU - Berger KL FAU - Marquis, Martin AU - Marquis M FAU - Steffgen, Jurgen AU - Steffgen J FAU - Kukolj, George AU - Kukolj G CN - BI 207127 Study Group LA - eng PT - Clinical Trial, Phase I PT - Journal Article PT - Randomized Controlled Trial DEP - 20130715 PL - United States TA - Antimicrob Agents Chemother JT - Antimicrobial agents and chemotherapy JID - 0315061 RN - 0 (Antiviral Agents) RN - EC 2.7.7.6 (DNA-Directed RNA Polymerases) SB - IM MH - Administration, Oral MH - Adolescent MH - Adult MH - Aged MH - Antiviral Agents/adverse effects/*pharmacokinetics/*therapeutic use MH - DNA-Directed RNA Polymerases/antagonists & inhibitors MH - Double-Blind Method MH - Female MH - Hepacivirus/*drug effects/*enzymology/genetics MH - Hepatitis C, Chronic/*drug therapy MH - Humans MH - Male MH - Middle Aged MH - Young Adult PMC - PMC3811456 EDAT- 2013/07/17 06:00 MHDA- 2014/04/10 06:00 PMCR- 2014/04/01 CRDT- 2013/07/17 06:00 PHST- 2013/07/17 06:00 [entrez] PHST- 2013/07/17 06:00 [pubmed] PHST- 2014/04/10 06:00 [medline] PHST- 2014/04/01 00:00 [pmc-release] AID - AAC.00565-13 [pii] AID - 00565-13 [pii] AID - 10.1128/AAC.00565-13 [doi] PST - ppublish SO - Antimicrob Agents Chemother. 2013 Oct;57(10):4727-35. doi: 10.1128/AAC.00565-13. Epub 2013 Jul 15.