InterMune, Inc. Announces Modification to On-Going Phase 2b Study of ITMN-191 in Patients with Chronic HCV Infection

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BRISBANE, Calif., Nov. 17 /PRNewswire-FirstCall/ -- InterMune, Inc. today announced that the on-going Phase 2b study conducted by Roche of ITMN-191 (RG7227) combined with standard of care (SOC) PEGASYS(R) (peginterferon alfa-2a) and COPEGUS(R) (ribavirin) in HCV treatment-naive patients has been modified.

Three patients in the blinded 900 mg q12h dosage cohort experienced a Grade 4 elevation in ALT levels, one of whom experienced an elevation of total bilirubin while also receiving concomitant allopurinol. After their review of the un-blinded data from all cohorts, the study’s independent Data Monitoring Committee (DMC) recommended that the 900mg q12h cohort be discontinued and that all other cohorts of the study continue. The companies accepted the DMC’s recommendations. The on-going Phase 2b study is blinded and consequently, additional details will not be provided.

About the Phase 2b Study

The objective of the Phase 2b randomized, double-blind, placebo-controlled study is to further characterize the safety, tolerability, and antiviral effects of ITMN-191 in triple combination, compared with standard of care (PEGASYS plus COPEGUS).

Part 2 of the study, is designed to further evaluate RG7227/ ITMN-191 in a 24-week triple combination regimen with PEGASYS and COPEGUS. Patients will be randomized to one of two study arms in Part 2, either a 24-week regimen of ITMN-191 in combination with PEGASYS and COPEGUS, or a control arm of PEGASYS and COPEGUS dosed for 48 weeks. Dose selection for Part 2 will be informed by week 4 results generated in Part 1.

About InterMune

InterMune is a biotechnology company focused on the research, development and commercialization of innovative therapies in pulmonology and hepatology. InterMune has an R&D portfolio addressing idiopathic pulmonary fibrosis (IPF) and hepatitis C virus (HCV) infections. The pulmonology portfolio includes pirfenidone for which InterMune has completed a Phase 3 program in patients with IPF (CAPACITY) and has submitted a New Drug Application (NDA) to the FDA. The hepatology portfolio includes the HCV protease inhibitor compound ITMN-191 (RG7227) which entered Phase 2b in August of 2009 and a second-generation HCV protease inhibitor research program. For additional information about InterMune and its R&D pipeline, please visit www.intermune.com.

Factors that could cause or contribute to such differences include, but are not limited to, those discussed in detail under the heading “Risk Factors” in InterMune’s most recent annual report on Form 10-K filed with the SEC on March 16, 2009 (the “Form 10-K”) and other periodic reports filed with the SEC, including the following: (i) risks related to the long, expensive and uncertain clinical development and regulatory process, including having no unexpected safety, toxicology, clinical or other issues or delays in anticipated timing of the regulatory approval process; (ii) risks related to failure to achieve the clinical trial results required to commercialize our product candidates; and (iii) risks related to timely patient enrollment and retention in clinical trials. The risks and other factors discussed above should be considered only in connection with the fully discussed risks and other factors discussed in detail in the Form 10-K and InterMune’s other periodic reports filed with the SEC, all of which are available via InterMune’s web site at www.intermune.com.

CONTACT: Jim Goff, InterMune, Inc., +1-415-466-2228, jgoff@intermune.com

Web site: http://www.intermune.com/

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