Bill Rote
Analyst · Leerink Partners
Thanks, Steve. During the third quarter, we continued to make progress with our two Phase III development programs. Both fosmetpantotenate and sparsentan have the potential to be first-in-class therapies for PKAN and FSGS respectively. These patient communities are currently facing serious unmet needs and are dependent upon us to deliver the first approved therapies for these conditions. As such, we're working diligently to move them both along as quickly as possible. Regarding our fosmetpantotenate program for PKAN, we are very pleased to reach the milestone of initiating dosing in the FORT study during the quarter, and we have since increased efforts to open additional clinical sites and accelerate our enrollment. Our goal is to have more than 20 sites participating in the study, and we made further progress initiating additional sites in the US, and preparing sites for initiation in Europe during the quarter. Per our study protocol, we are enrolling adult patients to enable a data safety monitoring board readout that would allow for pediatric enrollment to commence. We expect to reach that readout after some adult PKAN patients have been observed over a relatively short period of time. As Steve mentioned earlier, we remain on pace to complete enrollment during the second half of 2018. In addition to the FORT study, four patients continue to receive fosmetpantotenate and physician-initiated studies outside the United States. All four of these patients have been receiving fosmetpantotenate for more than two years, and remain stable on therapy. Recently, an update of one of these patients' experience was described in a presentation at the Child Neurology Society's annual meeting in Kansas City. The new data from months 15 to 30, of treatment with fosmetpantotenate, showed improvement in all clinical parameters. Specifically, the treatment was associated with a persistent improvement in the patient's functioning, as evidenced by the converging outcomes on functional scales, such as Part 2 of the UPDRS, and Euroqol 5-dimensional 3-level scale. The persistent benefit exhibited on Part 2 of the UPDRS is especially encouraging to us, as Part 2 of the UPDRS served as the basis for the development of our novel PKAN-ADL or PKAN activities of daily living scale. The PKAN-ADL is being utilized under a special protocol assessment agreement for the primary efficacy endpoint in our pivotal FORT study. Gait, and thus functional independence also reportedly improved and remains stable. Also encouraging is that the data presented most recently remained consistent with the reported outcomes from the other non-controlled physician-initiated studies. As you can see, there is a lot of positive momentum behind the fosmetpantotenate program, and we look forward to furthering our advancement of this potential first-in-class treatment for PKAN. I'll now move on to sparsentan, our investigational candidate for FSGS. We worked diligently during the quarter to submit protocol for our proposed Phase III trial to the FDA for review, and as Steve mentioned, we just received feedback from the agency last night. In a constructive response, the agency requested some additional quantitative modeling in order to qualify our surrogate endpoint to be considered for Subpart H accelerated approval. This is not a unique request given the higher standards set to gain approval via the Subpart H pathway. We've already begun pulling together the next steps to obtain the necessary analyses, and in parallel, we'll continue our clinical site preparation activities with our CRO in anticipation of engaging the agency again in early 2018, and initiating the trial thereafter. I'm pleased with the progress we're seeing in their preparation and look forward to an efficient trial start. We also just returned from ASN Kidney Week where we had a great engagement with the nephrology community and presented new data from our open-label extension in the Phase II DUET study. Regarding the presentation of new data, we were very encouraged to see a progressive reduction in proteinuria combined with stable eGFR during the open-label period to date. We were also pleased to see that sparsentan remained generally safe and well tolerated. Perhaps the greatest testament to the perceived benefit amongst both patients and physicians, is that we still have 74 patients participating in the extension today. Overall, at Kidney Week, we heard consistent enthusiasm for sparsentan from the community of physicians who treat FSGS, as well as other kidney diseases. As you all know, since the positive readout of DUET, we have been doing a considerable amount of work to understand where sparsentan and its unique dual mechanism of action may have utility in the treatment of additional orphan nephrology indications. While those efforts began with evaluation of many indications, the science continuously drove us towards a significant potential of IgA nephropathy. Mechanistically, the anti-proteinuric properties of sparsentan appeared to translate very well to IgA nephropathy, and we have had access to high-quality data to develop foundational work more quickly than we originally anticipated. Key to that has been an analysis of data covering the use of endothelin antagonism with IGAN, which are highly supportive of our premise that sparsentan may have utility across multiple glomerular nephropathies. We also did validation work with external advisers and key opinion leaders, who see a great opportunity for a non-immunosuppressive agent in this disease, that like FSGS, has few treatment options for physicians and patients. So we're looking forward to advancing sparsentan in IgA nephropathy alongside of FSGS. Our development strategy is being established and we plan on providing more details related to IgA nephropathy in the clinic in 2018. Finally, as Steve mentioned earlier, we are excited about the cooperative research and development agreement with NCATS of the National Institute of Health, and a Patient Advocacy Foundation, NGLY1.org, that was announced during the quarter. The cradle will focus on the development of assays for small molecule, high throughput screening in an effort to better understand the biology of NGLY1 deficiency and identify potential small molecules to be developed as therapeutics patients. Overall, we took meaningful steps this quarter to advance and expand our pipeline, and we look forward to sharing our many milestone ahead in 2018. Let me now turn the call over to Neil for his operational update. Neil?