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BI 201335 for Hepatitis C Moves into Phase 3 Trials

Boehringer Ingelheim this week announced that enrollment has begun for a Phase 3 clinical trial of its experimental HCV NS3/4A protease inhibitor BI 201335.

Direct-acting antiviral agents that target various steps of the hepatitis C virus (HCV) lifestyle are expected to bring about a new paradigm in treatment for chronic hepatitis C, especially for patients with hard-to-treat HCV genotype 1.

At the European Association for the Study of the Liver's International Liver Congress (EASL 2011) this month in Berlin, researchers presented promising results from the Phase 2b SILEN-C1 and SILEN-C2 trials, which evaluated BI201335 in people starting treatment for the first time and those who did not respond to prior therapy, respectively.

Below is an edited excerpt from a Boehringer Ingelheim press release announcing the start of follow-up Phase 3 trials for treatment-naive and treatment-experienced genotype 1 chronic hepatitis C patients.

Boehringer Ingelheim Announces Enrollment of First Patient
in Phase 3 Trial for Lead Hepatitis C Compound

Development program has been granted FDA Fast Track designation

Ridgefield, CT -- April 26, 2011 -- Boehringer Ingelheim Pharmaceuticals, Inc. today announced that enrollment has commenced at North American sites in its pivotal Phase 3 clinical trial program for BI 201335, the company's investigational, oral protease inhibitor for the treatment of chronic hepatitis C virus (HCV). Phase 3 trials have begun recruiting to evaluate BI 201335 plus standard-of-care (SOC) in both treatment-naive and -experienced patients with chronic genotype-1 HCV, the most challenging HCV genotype to treat. Results from the Phase 3 studies are expected in the first half of 2013.

The U.S. Food and Drug Administration (FDA) has granted Fast Track designation for the development program for BI 201335. Fast Track is a process designed to facilitate the development and expedite the review of drugs to treat serious diseases and fill an unmet medical need. The purpose is to get important new drugs to patients earlier.

"We are pleased to have begun enrolling patients at North American trial sites as we continue development of BI 201335," said Peter Piliero, MD, executive director, Medical Affairs, Boehringer Ingelheim Pharmaceuticals, Inc. "We look forward to initiating additional trials later this year in more patient populations, including HCV-HIV coinfected patients, as we continue to advance our HCV portfolio."

BI 201335 U.S. Phase 3 Trials

There are currently three Phase 3 trials enrolling patients around the world that together seek to enroll approximately 1,875 patients. Two of the three trials have U.S. trial sites that together plan to enroll approximately 495 patients.

In the U.S., Study 1220.47 will enroll approximately 370 treatment-naive genotype-1 HCV patients at 95 trial sites. This study will also include additional sites in Canada, Taiwan and Korea. Study 1220.7 will enroll approximately 125 treatment-experienced genotype-1 HCV patients who have failed at least 12 weeks of prior treatment with SOC at 40 trial sites in the U.S. This study also includes additional trial sites around the world.

In treatment-naive patients (Study 1220.47), BI 201335 will be dosed once-daily at either 120 mg or 240 mg for 12 or 24 weeks in combination with 24 or 48 weeks of pegylated interferon and ribavirin, the current HCV SOC. In treatment-experienced patients (Study 1220.7) BI 201335 will be dosed once-daily at 240 mg for 12 or 24 weeks in combination with SOC for 48 weeks for prior partial and null responder patients. Patients with prior relapse will be dosed with BI201335 once-daily at 240 mg for 12 or 24 weeks in combination with SOC for 24 or 48 weeks total duration. The primary endpoint of each trial is sustained viral response (SVR), which is considered viral cure.

For more information about clinical trials involving BI 201335, please visit

About Boehringer Ingelheim in Virology

Boehringer Ingelheim has more than 6,900 scientists working in cross disciplinary teams within our global R&D network in six large therapeutic areas, including virology. In addition to its ongoing research program for HCV, Boehringer Ingelheim has a long-standing history in virology drug development, including compounds for the treatment of HIV. The company has a well established research center in Laval, Canada, dedicated to virology research since the early 1990's, and is committed to developing new therapies for virologic diseases with a high unmet medical need.

Boehringer Ingelheim in Hepatitis C Virus (HCV)

BI 201335 is an investigational oral HCV NS3/4A protease inhibitor, discovered from Boehringer Ingelheim's own research and development, which has completed clinical trials through Phase 2b (SILEN-C studies). This Phase 2 program supports the investigation of BI 201335 in Phase 3 trials. Boehringer Ingelheim is also developing BI 207127, an NS5B RNA-dependent polymerase inhibitor that has completed Phase 1 clinical trials. Phase 2 trials evaluating BI 207127 with BI 201335 in interferon-sparing regimens, both with and without ribavirin, are currently underway.

About Boehringer Ingelheim Pharmaceuticals, Inc.

Boehringer Ingelheim Pharmaceuticals, Inc., based in Ridgefield, CT, is the largest U.S. subsidiary of Boehringer Ingelheim Corporation (Ridgefield, CT) and a member of the Boehringer Ingelheim group of companies.

The Boehringer Ingelheim group is one of the world's 20 leading pharmaceutical companies. Headquartered in Ingelheim, Germany, it operates globally with 145 affiliates and more than 42,000 employees. Since it was founded in 1885, the family-owned company has been committed to researching, developing, manufacturing and marketing novel products of high therapeutic value for human and veterinary medicine.

As a central element of its culture, Boehringer Ingelheim pledges to act socially responsible. Involvement in social projects, caring for employees and their families, and providing equal opportunities for all employees form the foundation of the global operations. Mutual cooperation and respect, as well as environmental protection and sustainability are intrinsic factors in all of Boehringer Ingelheim's endeavours.

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Boehringer Ingelheim. Boehringer Ingelheim Announces Enrollment of First Patient in Phase 3 Trial for Lead Hepatitis C Compound. Press release. April 26, 2011.























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