Dr. Jonathan Leff
Analyst · Canaccord Genuity. Your line is now open
Thanks, Jan. I am pleased to provide an update today on recent pipeline developments, including additional details on our TransCon CNP program. First, I will share some highlights for our other two clinical candidates TransCon Growth Hormone and TransCon PTH. We remain on track to report top-line results for our Phase 3 heiGHt trial in the first quarter of 2019. As a reminder, heiGHt is a randomized, open-label, active-controlled trial comparing once weekly TransCon Growth Hormone to daily Genotropin in treatment naïve pediatric subjects with growth hormone deficiency. The primary endpoint is annualized height velocity at 52 weeks. A non-inferiority analysis will compare both treatment groups. We enrolled 161 subjects ranging in age from 3 to 12. We believe the strong statistical power of heiGHt bodes well for the potential of TransCon Growth Hormone. We also recently passed our third Data Safety and Monitoring Board review for heiGHt during which independent experts evaluated the safety data and recommended the trial continue as planned. We are pleased with the safety profile for TransCon Growth Hormone as our review of aggregate data from heiGHt continue to be consistent with that of published literature and experience with daily growth hormone therapies. Our second clinical trial for TransCon Growth Hormone, the fliGHt or were SWITCH trial also completed enrollment at the end of the third quarter. The total of 146 subjects were enrolled, which means we now have more than 300 pediatric subjects enrolled in our Phase 3 clinical program. The combined safety data will form an important component of our filing package and achieves the safety database as agreed with regulatory authorities in Europe and the U.S. To review, the fliGHt trial is evaluating safety in subjects who switched from Daily Growth Hormone therapy to weekly trends on TransCon Growth Hormone with the follow-up of 6 months. The result of this trial will not only strengthen the safety experience for TransCon Growth Hormone, but are also expected to guide physicians on switching patients from daily to weekly therapy. Importantly, fliGHt includes some that were below 3 years of age. This will provide important information on utilization of TransCon Growth Hormone in subjects younger than those enrolled in the heiGHt trial. Finally, enrollment continues in the third component of our Phase 3 program, the enliGHten trial, an open-label long-term extension that includes subjects who participated in either the heiGHt or fliGHt trials. To-date, about 165 subjects have been rolled as subjects complete the heiGHt and fliGHt trials. While we proceed with our clinical programs, our underlying focus remains on patients. We believe a once weekly growth hormone therapy could overcome a key challenge that hinders children with growth hormone efficiency, the continued struggle of adherence with daily therapies. Missed doses not only impact height, but can also adversely affect bone, muscle, heart and brain development. With the potential to provide the same efficacy, safety and tolerability as daily growth hormone, TransCon Growth Hormone is designed to overcome this barrier and have a positive impact on patients’ lives. Turning now to our second pipeline candidate, TransCon PTH. We are making good progress preparing to initiate a randomized placebo controlled Phase 2 trial in the first quarter of 2019. As a reminder, TransCon PTH is a long-acting pro drug of parathyroid hormone or PTH. It is in development to treat hypoparathyroidism, a rare endocrine disorder characterized by insufficient levels of PTH, resulting in low calcium and elevated phosphate levels in the blood. Maintaining continuous and sustained levels of PTH in the physiological range has been shown to not only raise serum calcium levels but also normalize the processes related to bone turnover and kidney function. We expect the Phase 2 trial to enroll approximately 40 subjects in North America and Europe. The primary endpoint will be a composite endpoint, representing control of serum and urinary calcium levels, as well as reduction in calcium and vitamin D requirements. In this trial, TransCon PTH will be administered via an injection pen. As mentioned previously, the trial will explore a titration schedule, designed to evaluate the ability to completely remove standard of care with activated vitamin D and calcium supplementation. The trial duration will be four weeks after which subjects may enter long-term extension trial. Finally, let me add some comments on our third pipeline candidate, TransCon CNP, including details related to the preliminary data presented today and shown in the deck posted on our website. The Phase 1 trial was a double-blind, randomized, placebo-controlled trial, evaluating the safety, tolerability and pharmacokinetics of TransCon CNP in healthy adult subjects. In this trial, the total of 45 subjects were enrolled. The trial tested 5 doses sequentially, 3, 10, 25, 75, and 150 micrograms per kilogram. Up to 10 subjects were randomized to receive TransCon CNP or placebo in a 4 to 1 ratio. After each dose level was completed, the DSMB was convened to review the blinded data and approve escalation for the next higher dose. The data were unblinded after each assessment. As Jan described, the preliminary data from this trial support our moving ahead with plans to final the U.S. IND in mid 2019, and initiate a Phase 2 trial of TransCon CNP in subjects with achondroplasia soon thereafter. They also support our desired profile for TransCon CNP. In addition, we plan to initiate the ACHIEVE trial, our natural history study in achondroplasia by the end of this year. We believe the ACHIEVE trial will provide important observational insights into the experience of children living with achondroplasia, further informing our clinical program going forward. We are all acutely aware of the need for a safe and effective therapeutic option for achondroplasia. It is the most common form of dwarfism, occurring in about 1 in 10,000 to 30,000 newborns or approximately 250,000 worldwide. Current treatments and development may increase heights, but for patients, the associated comorbidities are much more devastating. These include spinal stenosis and narrowing of the spinal canal that can compress the upper part of the spinal cord, hydrocephalus, a buildup of fluid in the brain and sleep apnea among many others. With the potential of TransCon CNP to deliver continuous levels of CNP over one week, our hope is to develop a treatment option that improves many aspects of patients’ lives, well beyond just height. All three of our pipeline programs have now been clinically validated. And we're exploring opportunities to strengthen our global presence and bring our innovative therapies to patients worldwide. Our VISEN partnership enables this for all three of our clinical programs in China. And in parallel, we continue to pursue additional opportunities in other parts of Asia with our other programs. Throughout the year, we've made great strides with our three potential therapies for rare endocrine diseases. Looking ahead to 2019, we are enthusiastic about reporting pivotal data for our TransCon Growth Hormone program and ramping up clinical activities for our other two programs in hypoparathyroidism and achondroplasia. Our pipeline now includes three endocrinology programs with strong target product profiles, all three supported by clinical data. In closing, I would like to thank our investigators and patient communities for their contributions in supporting our efforts to develop new and differentiated therapies to treat rare and endocrine diseases. Now, Scott will provide a financial update.