Henry Fuchs
Analyst · Deutsche Bank
Thanks, Steve. As J.J. noted earlier, the successful execution of our pipeline is a top priority for the company, and we have made significant progress in advancing our research and development programs during the quarter. Starting with GALNS for MPS IVA, the pivotal Phase III trial is progressing well and we expect enrollment to increase further as additional sites open. We continue to expect to report top line results in the second half of 2012 and to file by either the end of 2012 or beginning of 2013. With regard to the Phase I/II extension study as detailed in a press release issued earlier today, the ongoing study suggests GALNS sustains improvements and endurance in respiratory function for at least 2 years. Recall that in the original Phase I/II study, patients were dosed at 0.1 milligrams per kilo for 12 weeks, and then moved up to 1.0 milligrams per kilogram for 12 weeks and then 2.0 milligrams per kilogram for 12 weeks. Thereafter, these patients were dosed at 1 milligram per kilo for an additional 36 to 48 weeks. And then these patients were brought back to a dose of 2 milligrams per kilo. We can now provide a preliminary update on the findings of these extension studies, including information on patients treated for 24 additional weeks at 2 milligrams per kilo, the dose that we're using in our Phase III pivotal trial. Taken together, patients have been treated for approximately 2 years and their treatment continues on an ongoing extension study. Measures at 6 minutes walk distance, 3 minutes stair climb and pulmonary function all generally improved and sustained for at least 2 years. For the group of patients whose baseline, 6-minute walk distance was less than 325 meters, that is the patient population that will be enrolled in the Phase III trial, mean walked distance remains consistently improved for the entire period of observation. Specifically, 24 weeks after resuming 2 milligrams per kilo per week dosing in the more 100 extension study, the mean 6-minute walk distance was 38 meters. This is roughly equivalent to that observed after the first 24 weeks of the original Phase I/II trial MOR-002. The ongoing Ph III study, as I mentioned, is using mean improvement in 6-minute walk distance in patients with baseline walk distance less than 325 meters as the primary endpoint. 6-minute walk distance improvements were greater in the subgroups of patients with less than 325 meters. However, variability of this test increases with longer-term follow-up likely as a result of issues related to the progressive nature of Morquio syndrome. Several measures to reduce variability already been incorporated in the ongoing Phase III trial, and I'd like to delineate those measures that have already been incorporated into the Phase III trial. Specifically, we'll include a large sample size, and this study will be the largest enzyme replacement therapy for lysosomal storage disease conducted to-date. We will focus on selecting patients who are not expected to require surgical corrections with skeletal deformities in a subsequent 24-week period of the study. We'll conduct duplicate measures of 6-minute walk tests. The study will be concluded -- the double-blind randomized portion of the study will conclude at 24 weeks. And the extension -- and we will have extensive oversight of the performance walk test according to the ATS grade American Thoracic Society criteria. And finally, we include a placebo in the clinical trial for comparative purposes. Three-minute stair climb and pulmonary function have of consistently improved over the entire duration of the study. 24 weeks after returning to 2 milligrams per kilo, patients can now climb a mean of 13.6 stairs per minute and force vital capacity has improved the mean of 15.9%, compares favorably to 6.9 stairs per minute and 1.5% improvement in FEC reported at the end of the first 24 weeks of the Phase I/II trial almost a year ago. Stair climb and pulmonary function are secondary and tertiary endpoints respectively in the ongoing prospective Phase III trial. The data of the extension study to-date supports 6-minute walk distance as the primary endpoint and patients with baseline walk distance of less than 325 meters as an entry criteria in the ongoing Phase 3 GALNS trial, given the large and durable effect of the drug on these measures in the population. In totality, these observations increase our confidence in the Phase III trial design. These results will be submitted for presentation in detail at the World Lysosomal Storage Disease Conference in February. We continue to receive encouraging reports on the overall improvements in well-being of patients on GALNS. I'd like to share a few anecdotes we've heard from treating clinicians. First, we showed a video of a non-ambulatory patient at our Research and Development Day. This is patient who required assistance in completing simple everyday tasks prior to enrollment in the GALNS study, specifically this patient was bed-bound and required, physical assistance to transfer from bed to wheel to potty and the patient couldn't even sign his own name. At this point now, nearly 2 years later, the patient can climb 61 stairs in 3 minutes, which is a remarkable change in that patient's mobility and independence in living. Next, a patient had an 11-week drug holiday due to travel and logistical complications. And therefore, became completely non-ambulatory while off medication. Upon returning to therapy, the patient recovered the ability to complete the 6-minute walk test and continues to improve toward pre-holiday levels. Finally, 2 patients who had elective knee surgery during the dose escalation phase of the study remained on steady medication while their knee surgeries were conducted. The surgeries were declared successful, and just over half the time required for recovery in patients not treated with GALNS. Specifically, femoral plate screws were removed from these patients in under half the time usually required -- and just about half the time usually required. Now these are 3, 4 anecdotes in patients treated in the GALNS program but we continue to hear other evidence of clinical benefits from patients that are encouraging, although not statistically meaningful and anecdotal, they clearly demonstrate an improvement in patient outcomes and give us increased confidence in the GALNS program. It's also remarkable that improvements in endurance are sustained in spite of severe and progressive nature of Morquio syndrome. Patients with Morquio syndrome can miss therapy for example due to the need for corrective surgeries. In spite of that, we see patients improving once they return to therapy. Now turning to PEG-PAL. We are on track to proceed to a Phase III trial on the first or second quarter of 2012. First, let's take a step back to evaluate the progression of the Phase II program to-date. We view the PEG-PAL Phase II program in 3 segments. Segment A enrolled 23 patients with 8 weeks of repeat dosing followed by an uptitration to find the therapeutic level of dosing. Segment B enrolled 10 patients and compared 2 formulations, which differed primarily on the level of PEGylation and viscosity. We're starting doses for segments A and B were relatively low and the titration was extremely gradual and measured, taking over 6 months for some patients to reach therapeutic level. The highest dose reached in segments A and B were 2 milligrams per kilo per week, which today appears safe, tolerable and results in significant Phe level drops in the majority of patients. No significant differences in tolerability or efficacy were observed between the PEG formulations of differing levels of PEGylation and viscosity. Taking what we learned from segments A and B of the trial, we proceeded to segment C, which is our ongoing daily dosing evaluation. The goal of the study is to verify the safety of starting patients on daily administration of the drug, recognizing that it will be preferable to administer one injection per day than multiple injections once per week. We started at 0.4 milligrams per kilo for 5 days a week, the equivalent of the 2-milligram per kilo maximum dose achieved in segments A and B. Segment C is expected to enroll 10 or more patients. At this point in the daily dosing study, we believe that we have a good chance of demonstrating a strong efficacy, safety and commercial profile. PEG-PAL when delivered daily, initially results in large reductions in Phe, to below the normal range of 65 micromolar at initial doses as low as 0.1 milligrams per kilo in all patients treated. There is a common transient side effect of generalized rash in at least half the patients that does not persist with continued treatment. While joint pain has occurred in some patients treated in higher doses in the study, all side effects were transient. All patients have been keen to remain on therapy as these initial effects subside. And in fact, they would resume safe therapy safely. We anticipate that longer term, fee reductions can be sustained as has been demonstrated in segment A. Finally, we anticipate that dosing can be administered in a single daily injection, consisting of a volume of under 1 milliliter based on the similarity of the lower viscosity material in patients as demonstrated in segment B. We now have patients that have been on PEG-PAL for more than one year of therapeutic doses and all without any significant signs of long-term safety concerns. Pending the accumulation of more daily dosing data and near-term discussions with the FDA, PEG-PAL will likely progress to Phase III in the first or second quarter of 2012. The Phase III program will likely include some dose adjustment as patients move through the period of transient vulnerability to generalized skin reaction. The therapeutic goal of the achievement of large and durable reductions in Phe, clearly allowing for at least some patients resumption of normal food intake. A complete data from these studies will be presented at a possible mini R&D Day in the fourth quarter and the subsequent scientific meeting. Moving on to Kuvan life cycle development. The randomized placebo control 13-week outcome study is ongoing as Steve mentioned. Endpoints include clinically validated measures of neuropsychiatric symptoms, and if successful, may support a label amendment. Regarding Firdapse, we initiated a Phase III trial on the U.S. in the second quarter. In January, we initiated a Phase I/II trial of BMN-701 for late-onset Pompe's disease, trials and open label study to evaluate the safety pharmacokinetics, pharmacodynamics and clinical activity of BMN-701 administered as an IV infusion every 2 weeks. If this is the 5 milligrams per kilo, 10 milligrams per and 20 milligrams per kilo. We have completed enrollment in the 5 milligrams per kilo at cohort, cleared the safety review and have the authorization to start enrolling patients at 10 milligrams per kilo, which we expect to occur this month. We expect to report top line results in the second half of 2012. We also now have 2 ongoing trials for our PARP inhibitor, BMN-673. In January, we initiated a Phase I/II open label trial of once daily, orally administered BMN-673 in patients ages 18 and older with advanced to recurrent solid tumors. Two weeks ago, we initiated a 2-arm open label dose escalation Phase I trial with hemologic malignancies. The primary objective of these studies is to establish the maximum tolerated dose of daily, oral BMN-673 and obtain preliminary efficacy data in an expanded cohort of patients with genetically defined tumors. We're also advancing BMN-111, the CMP analog for achondroplasia, animal data for BMN-111 was presented at the International Scale of Dysplasia Meeting in June in Australia. Interactions with global health authorities have begun, and we look forward to finalizing the design of the initial Phase I studies and progressing as quickly as possible to improve a product concept outcome. We're very excited about this program and expect to initiate a Phase I trial in the first quarter of 2012. So as you can see, we have a very full and diversified pipeline ranging from preclinical programs to GALNS and the Phase III pivotal study. We'll keep you updated on our progress of our programs as they advance. And with that, operator, we'd like now to open the call for questions.