Peter Mueller
Analyst · Bernstein
Thank you, Nancy, and hello, everyone listening to today's call. Obviously, we had a tremendously productive first half of 2011, with the successful advisory committee for INCIVEK and hepatitis C and subsequent approval and launch, as well as completion and readout of Phase 3 data for VX-770 in cystic fibrosis. These were all major milestones for the company and represented the successful outcome of many years of research, clinical, CMC and regulatory efforts. Our hepatitis C and cystic fibrosis programs are critical programs for the company, and we expect that the second half of the year will be marked by additional data and presentations from these programs to help further improve therapy in hepatitis C and position ourselves potentially, to treat a greater number of people living with cystic fibrosis. I'd like to start today with a review of our efforts on the cystic fibrosis front. With the Phase III data in hand, we are aggressively preparing the MAA and the NDA documents and expect to submit those applications in October, specifically targeting approval in children aged 6 and older and adults with the G551D mutation. We conducted a successful pre-NDA meeting in the U.S. and rapporteur and co-rapporteur meetings in Europe to support the submissions, and these meetings were very, very constructive. Specifically, in line with our commitment to make VX-770 available to CF patients who can benefit from the medicine, we are focusing our attention on additional studies. First, we have developed a pediatric formulation of VX-770 and have discussed with the FDA a protocol for initiating a registration study in younger children ages 2 to 5. This will be an important study, and we believe VX-770 could potentially benefit people with cystic fibrosis who are treated earlier and before significant damage to the lung is incurred. Secondly, during our pre-NDA meeting for VX-770, we have productive discussions regarding the potential future evaluation of sweat chloride data to understand its use as a marker for clinical benefits. As an outcome of these discussions, we are developing clinical protocols for studies of at least 4 weeks in duration to evaluate whether VX-770 monotherapy has a clinical benefit in people with scaling [ph] mutations other than G551D, as well as other mutations that have residual CFTR function. Additional information will be provided at the completion of discussions with the FDA and other regulatory agencies concerning these proposed protocols. We expect these studies to begin in the first half of 2012. Next, I will highlight our combination therapy studies in cystic fibrosis. In the second quarter, we have announced results from Part 1 of our Phase II combination study, this VX-809 and VX-770. This study is designed to evaluate the treatment cystic fibrosis in people with the F508del mutation, the most common CFTR mutation. Based on these data, we expect to initiate Part 2 in September pending FDA approval of the broader design. We expect Part 2 of the drug will evaluate higher doses of VX-809 monotherapy for a minimum of 4 weeks followed by a dosing of VX-770 and VX-809 in combination for a minimum of another 4 weeks. This study will measure sweat chloride FEV1 and safety as well as other markers of clinical activity in people with cystic fibrosis with either 1 or 2 copies of the F508del mutation, that is F08del heterozygotes and homozygotes. Now turning to Hepatitis C and our clinical activities focused on further improving the treatment regimen. We are conducting currently several programs in parallel to achieve this goal. One approach is our 4-drug therapy evaluating multiple 12- and 24-week response guided regimens of INCIVEK, VX-222, this pegylated-interferon and ribavirin. This week, we announced the study week-24 interims data, which included SVR12 results from patients who were treated for 12 weeks only. Results show that at least 1/2 of the patients who were treated for 12 weeks in the high dose VX-222 are eligible to stop treatment with the 4-drug regimen at week 12. One of these patients, of these patients, 14 out of 15 or 93% of patients achieved SVR12. The patients who were assigned the 24-week regimen remained undetectable at the end of the treatment. In addition, interim safety results from the recorded arms showed that mild GI symptoms and mild fatigue were the most frequently recorded adverse events. Side effects are consistent with the known safety profile of INCIVEK combination treatment, and the interim data suggest potential to treat Hepatitis C in as few as 12 weeks and no longer than 24 weeks. We look forward to the outcome in patients receiving 24 weeks. This data will guide our future development of this very important regimen. Our second approach to improve the regimen is on all oral triple interferon-sparing regimen with INCIVEK, VX-222 and ribavirin. We expect to complete enrollment in these study arms evaluating genotype 1A and 1B hepatitis C patients in the third quarter. Our third approach will involve nuclear-type compounds from a collaboration designed with Alios last month. We are working with them diligently to initiate first-in-human trials later this year to set the stage for potential oral combination studies in 2012. Data from all of these programs will inform us of our next step in advancing this potential Hepatitis C treatment regimens. In addition, in the third quarter of this year, we expect to initiate a short duration study in approximately 400 genotype 1 treatment-naïve patients who have a specific polymorphism known as CC near the IL28B gene. This study will evaluate 12 weeks of INCIVEK in combination with pegylated-interferon and ribavirin. Data are expected in 2012. We estimate that close to 1/3 of the people who have not been treated for the Hepatitis C have this marker, and it could be a significant benefit for them if we can reduce treatment to 12 weeks while maintaining high viral cure rates. Now to the other pipeline programs. Turning next to our JAK3 inhibitor, VX-509. In September, we expect to announce top line clinical data from our Phase II proof-of-concept study in rheumatoid arthritis, which will include safety, tolerability and clinical efficacy measured by ACR20, 50 and 70 and other measures. Our goal in this study is to see tolerability and efficacy that enable us to identify a dose or several doses to take forward in development. We believe that as a selective JAK3 inhibitor, we have the opportunity, with 509, to see a wider therapeutic window that may not exist for retroactive JAK inhibitors. While rheumatoid arthritis is the first indication for which VX-509 is being evaluated by the company, we also believe there could be many other inflammatory indications where a selective JAK3 inhibitor could potentially have clinical benefit. We are also working on several exciting pre-clinical programs, and we expect that at least one new program, our flu program for VX-787 will start Phase I clinical trials in healthy volunteers in September to be followed by a Phase II trial in people challenged with an attenuated influenza virus in the first half of 2012. We recently completed a successful pre-R&D meeting with the FDA for this investigational medicine. VX-787 is designed to treat influenza A, including recent H1 endemic and H5 avian flu strains through a mechanism distinct from neuraminidase inhibitors, the current standard of care, and from other previously reported approaches known for treatment of flu. So in summary, we look really forward to keeping you updated on our progress in these programs and other programs as they advance and hope to bring forward more medicines like INCIVEK with the goal of improving the lives of people living with serious diseases. And now I'm turning back the call to Michael.