Study Design and ResultsThe expansion of this randomized, open-label, phase IIa study evaluated the antiviral activity and safety of the combination of DCV and ASV with and without alfa/RBV in 101 HCV genotype 1 prior null responders to alfa/RBV. The primary endpoint of the study was the proportion of patients achieving undetectable viral load (HCV RNA < LLOQ TND) 12 weeks post-treatment (SVR 12). Patients received one of five treatment regimens for 24 weeks. Genotype 1b infected patients were randomized to receive one of four treatment regimens for 24 weeks (two DCV/ASV Dual treatment groups, two DCV/ASV/Alfa/RBV Quad treatment groups). Genotype 1a infected patients were randomized to receive one of two treatment regimens for 24 weeks (two DCV/ASV/Alfa/RBV Quad treatment groups). A fifth group (DCV/ASV/RBV Triple therapy) included both GT1a and GT1b infected patients and enrolled separately. The DCV/ASV Quad treatment groups received DCV 60 mg once daily and ASV 200 mg either twice daily (Group B1) or once daily (Group B2). Both groups received a backbone of PEG-interferon alfa-2a 180 µg once weekly and ribavirin 1000-1200 mg daily (according to body weight) in two divided doses. Virologic Response DCV ASV Quad therapy resulted in high rates of sustained virologic response in this predominantly genotype 1a prior null responder patient population. Of patients in Groups B1 and B2, 85% (17/20) and 91% (19/21) had HCV genotype 1a.
- Group B1 patients (ASV dosed BID), achieved SVR 12 and SVR 24 rates of 95% (19/20) and 90% (18/20), respectively. One patient did not receive a viral load measurement at 24 weeks post-treatment.
- Group B2 patients (ASV dosed QD) achieved SVR 12 and SVR 24 rates of 95% (20/21).
- There was no virologic breakthrough in either Group B1 or B2. Two patients relapsed post-treatment, one Group B1 patient at week 4 and one Group B2 patient at week 12.
SafetyIn the patients treated with DCV ASV Quad therapy, there were no serious adverse events due to study drug, no deaths, and no treatment discontinuations due to adverse events (AEs). Most AEs were mild to moderate in severity. The most common AEs (≥40% in any group) were:
|Adverse Event||Group B1 DCV + ASV 200 mg BID + alfa/RBV||Group B2 DCV + ASV 200 mg QD + alfa/RBV|
|Headache||60% (12/20)||43% (9/21)|
|Diarrhea||45% (9/20)||33% (7/21)|
|Weakness (asthenia)||30% (6/20)||57% (12/21)|
|Fatigue||40% (8/20)||24% (5/21)|
|Insomnia||45% (9/20)||14% (3/21)|
About Bristol-Myers Squibb’s Commitment to Liver DiseaseBristol-Myers Squibb is studying a portfolio of compounds that aims to address unmet medical needs across the liver disease continuum, including hepatitis C, hepatitis B and liver cancer. The Company’s hepatitis C pipeline includes compounds with different mechanisms of action, pursuing both biologics as well as small molecule DAAs. These compounds are being studied as part of multiple treatment regimens with the goal of increasing SVR rates across diverse patient types and geographies. Daclatasvir is an NS5A replication complex inhibitor that is being extensively studied as a key component of potential DAA-based hepatitis C treatment regimens. Studied in more than 3,000 patients to date, daclatasvir is in Phase III development. Asunaprevir is an NS3 protease inhibitor in Phase III development for hepatitis C as a component of daclatasvir-based treatment regimens, and has been studied in more than 1,200 patients to date. About Hepatitis C Hepatitis C is a virus that infects the liver and is transmitted through direct contact with infected blood and blood products. An estimated 170 million people worldwide are infected with hepatitis C, with genotype 1 being the most prevalent genotype. Up to 90 percent of those infected with hepatitis C will not clear the virus and will become chronically infected. Twenty percent of people with chronic hepatitis C will develop cirrhosis and, of those, up to 25 percent may progress to liver cancer. About Bristol-Myers Squibb Bristol-Myers Squibb is a global biopharmaceutical company whose mission is to discover, develop and deliver innovative medicines that help patients prevail over serious diseases. For more information, please visit http://www.bms.com or follow us on Twitter at http://twitter.com/bmsnews. Bristol-Myers Squibb Forward Looking Statement This press release contains “forward-looking statements” as that term is defined in the Private Securities Litigation Reform Act of 1995, regarding the research, development and commercialization of pharmaceutical products. Such forward-looking statements are based on current expectations and involve inherent risks and uncertainties, including factors that could delay, divert or change any of them, and could cause actual outcomes and results to differ materially from current expectations. No forward-looking statement can be guaranteed. Among other risks, there can be no guarantee that the compounds described in this release will support regulatory filings, or that the compounds will receive regulatory approvals or, if approved, they will become commercially successful products. Forward-looking statements in this press release should be evaluated together with the many uncertainties that affect Bristol-Myers Squibb’s business, particularly those identified in the cautionary factors discussion in Bristol-Myers Squibb’s Annual Report on Form 10-K for the year ended December 31, 2011, in our Quarterly Reports on Form 10-Q, and our Current Reports on Form 8-K. Bristol-Myers Squibb undertakes no obligation to publicly update any forward-looking statement, whether as a result of new information, future events, or otherwise.