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Abbott Announces Phase 3 Hepatitis C Program Details

ABBOTT PARK, Ill., Nov. 13, 2012 /PRNewswire/ -- Abbott (NYSE: ABT) today released details on its phase 3 hepatitis C registrational program following promising results from its phase 2b clinical trial, known as Aviator, presented at the Annual Meeting of the American Association for the Study of Liver Disease (AASLD) in Boston. The phase 3 clinical trials are designed to evaluate safety and efficacy of a 12-week regimen of three direct acting antivirals (DAA), with and without ribavirin, for the treatment of HCV in genotype 1 (GT1) non-cirrhotic, treatment-naïve and treatment-experienced patients. An additional phase 3 trial will study triple-DAAs, with ribavirin, in patients with cirrhosis for 12 or 24 weeks. 

The phase 3 program, which is currently open for enrollment, will include more than 2,000 patients with HCV genotype 1, with trial sites in 29 countries. The DAAs in the studies include ABT-450/r (protease inhibitor and ritonavir), ABT-267 (NS5A inhibitor) and ABT-333 (non-nucleoside polymerase inhibitor). Treatment duration will be 12 weeks in non-cirrhotic patients, and 12 or 24 weeks in cirrhotic patients. All patients will be followed for 48 weeks post-treatment. Co-formulated tablets of ABT-450/r and ABT-267 will be used in the phase 3 trials.

More information on the trials is available at www.clinicaltrials.gov.

"Abbott is committed to investigating a short-course HCV therapy without the use of interferon to achieve high SVR rates," said Scott Brun, M.D., divisional vice president, Infectious Disease Development, Abbott. "Our trial enrollment strives to reflect a broad range of populations, including those that have been difficult to treat. We have been very encouraged by the data from the phase 2 studies, and look forward to confirming the findings in our phase 3 program."

Topline intent-to-treat results from the 12-week, triple-DAA regimens with ribavirin presented at the AASLD meeting this week found that 97.5 percent (77 of 79) of treatment-naïve GT1 patients and 93.3 percent (42 of 45) in GT1 null responder patients achieved SVR 12.

About the Hepatitis C VirusHepatitis C is a liver disease affecting as many as 170 million people worldwide. The virus is primarily spread through direct contact with the blood of an infected person. HCV increases a person's risk of developing chronic liver disease, cirrhosis, liver cancer and death; and liver disease associated with HCV infection is growing rapidly.

Of the six main genotypes of hepatitis C, genotypes 1, 2 and 3 are the most widespread. Genotype 1 is the most common genotype in the U.S. and the most difficult to treat with interferon based therapies. Patients with genotypes 2 and 3 are more likely than individuals with genotype 1 to respond to therapy with peg-interferon or the combination of peg-interferon and ribavirin.

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