Ben Zimmer
Analyst · Cantor. Your line is open. Please go ahead
Great. Thanks, Matt. Before going into the 52-week data, I just wanted to briefly highlight two tailwinds in I&I that we are really excited about as it relates to the brepo Phase 3 programs in NIU, as well as in dermatomyositis, and these are outlined on slide 11. The first on the left-hand side is you can see that as a category, JAK inhibitors have roughly doubled since 2020 in terms of both treated patients and revenue. And I think this really speaks to the fact that the benefit-risk profile of these agents and physicians and patients’ comfort with that benefit-risk profile is quite established at this point and that even includes in indications with significantly less morbidity than those in which Priovant is operating. And then in terms of those indications where Priovant is operating these orphan diseases with high morbidity, we've also seen over the last few years several launches in those, including the one played out on the right-hand side of this slide that have really validated this category of indication as a source not only of blockbuster revenue, but blockbuster revenue that can be achieved in a very quick timeframe given the prevalence of the disease, high morbidity, high unmet need, and concentrated prescriber base with orphan pricing. And so if you turn to slide 12, you see that NIU really fits this phenotype quite on the money around 70,000 to 100,000 patients in terms of prevalence, very high morbidity, fourth leading cause of blindness in the developed world among the working age population, very little available for patients and concentrated prescriber base. Most of these patients are seen at dedicated uveitis specialty centers. And turning to slide 13, you see really supporting this -- a new claims analysis that we did with IQVIA, which reconfirms once again the large number of patients receiving biologic therapy and TNF therapy, in particular. In 2022, about 40,000 patients with NIU receiving a TNF inhibitor, including Humira and off-label TNF inhibitors as that number as you can see is growing quite significantly and includes between off-label TNFs and other biologics, a large number of off-label therapies. And we know both from real-world experience and from clinical trials that Humira is only effective in fewer than 50% of patients with NIU. So I think this data here really speaks to both the large commercial opportunity in the TNF-refractory population, but also with all of these off-label therapies, the urgency that physicians and patients feel to find something that does work and the willingness to try that and try it aggressively, and we think that speaks to the additional opportunity for brepocitinib given our data potentially in the broader non-anterior NIU population. So with that context, I'll turn to the data itself. Just a brief reminder on slide 14 of the design of the Phase 2 NEPTUNE study as this enrolled patients with active non-interior NIU randomized 2:1 to brepo 45 milligrams and 15 milligrams, consistent with past studies, including the registrational study for Humira, as well as the treatment paradigm in NIU, given how sick these patients are and are in need of an -- immediate therapy to avoid the risk of blindness, all patients in both arms receive a two-week 60 milligram per day steroid burst and then are rapidly tapered off those steroids. And the primary goal of the study then is to prevent treatment failure. Notably, as a reminder, in the NEPTUNE study, the taper occurred over six-weeks to week eight while on precedent studies, including the Humira VISUAL 1 study and occurred over 13 weeks. So the study was designed really to set actually a higher bar for brepocitinib, make it more difficult for it to demonstrate efficacy. And so against that backdrop, we're very excited with the results that were generated. And turning now to slide 15 to walk through that, we start with the primary endpoint from the NEPTUNE study. And on the left-hand side of the slide, you see the -- what was the primary endpoint, which is the 24-week treatment failure rate, which we've shared previously. And then on the right-side, we have the updated data at week 52, in both cases measured here against the historical placebo rate from the VISUAL 1 study. As Matt mentioned, only one additional patient met treatment failure criteria in each arm, so excellent data sustained after week 52. You'll recall that Humira's failure rate at week 24 was over 50% using this analysis that includes discontinuations with 62%. And although AbbVie did not specifically report a one-year failure rate, their rate based on the data that was published was well in excess of 70% under this analysis. And probably the most effective way to compare to Humira now, which we do on slide 16, now that we have one year data from the NEPTUNE study is against what was the pre-specified primary endpoint in the VISUAL 1 study, which was median time to treatment failure. And you see that on slide 16 with three months for the placebo arm and VISUAL 1, 5.6 months for the active arm, so again, reinforcing that the median patient fails before six months. So more than half of patients even just at the six-month mark, let alone the one-year mark, are not able to receive benefit. And then you see in contrast in brepo, the low-dose arm median time to treatment failure 9.3-months. And in the high-dose arm, as we did not get to a 50% treatment failure rate even at one year, it's not estimable over 12 months. So very exciting data on treatment failure. And on slide 17, we also see that clinical data supported by what's really the gold standard biomarker for measuring ocular inflammation, which is wide-field fluorescein angiography measurements of retinal vascular leakage. And you see here on the left side data for the high-dose arm, brepo 45 milligrams; on the right side, the low-dose arm, brepo 15 milligrams. The top row is the week-24 data, which we presented at the EURETINA conference this fall, and then the bottom is the new 52-week data today. And you see really great data, particularly from the high-dose arm, no patients worsening, most of the patients improving and that improvement from week-24, which was already quite significant, not only being sustained up to 52-weeks, but actually even increasing slightly. And then you see at both time points a very clear dose response as it relates to the 15 milligram data. So very exciting data here that I think resonates quite a bit with the ophthalmology community in particular. Turning to slide 18, wanted to share an update as well on our macular edema data. I think this is one where the 52-week data is particularly important because macular edema in uveitis patients really develops over time as the medium to longer-term consequence of inflammation. So even if inflammation can be gotten under control to the point that it's not impairing visual acuity in the short-term, low levels of inflammation over time can lead to macular swelling and ultimately macular edema, which of course, is one of the causes of blindness in uveitis patients and significantly impaired vision otherwise. And so week-24, as you'll recall, we had quite exciting data in the 45-milligram arm of the 10 patients, who did not have macular edema at baseline, none developed it. And of the seven patients who had it at baseline, three out of those seven had resolution. But at the time, we were very eager to see the extent to which that held up at one year and very excited to share that it held up as you can see here quite well with no new patients developing macular edema and the three who had resolution maintaining that resolution. And again, this compares quite favorably to Humira, which is generally viewed by physicians in the real-world as not being super effective at preventing the onset of macular edema, and you see that's actually supported by data from the VISUAL 1 study, where at one year, of patients, who did not have macular edema at baseline, half of them had developed it at one year. And in the placebo group, that was six months. So again, a small number of patients. We're excited to see what the Phase 3 data looks like, but certainly very promising in terms of the potential of the drug. And then just very briefly on slide [19] (ph), want to further reinforce the robustness of this by looking at mean CST over time and you see here in addition to the great data in the 45-milligram arm, a clear dose response with the 15-milligram arm, which is great to see, as well as time course data that is consistent with what you'd hope to see, particularly looking at the 45-milligram arm, very rapid onset of effect in the first few weeks, even while the steroid taper has already begun at week two and then that is clearly sustained over time out to one year. So, very excited about the Phase 2 data and we're already excited after six months, even more excited now after one year. And at Priovant, we're already really focused now on the Phase 3, not the Phase 2 and excited to share, as Matt mentioned, and as we announced a few months ago that enrollment of that study is underway and off to a great start. You see on slide 20 here the schematic for the study, very closely modeled on the Phase 2, as you would -- as one would imagine. We are advancing only the 45 milligram dose into Phase 3 with patients randomized 1:1 for brepo 45 milligram against placebo. This study is a single protocol, so technically one study, but with two identical sub-studies. So it will be reported out as two studies, CLARITY 1 and CLARITY 2, 150 subjects per sub-study, so 300 subjects total. And the primary endpoint will be time to treatment failure, so the same primary endpoint as the VISUAL 1 study and that will be over period one, which is one year of placebo-controlled data. And then secondary endpoints will include all of the same measurements as the NEPTUNE study. And notably as well, we are maintaining the rapid steroid taper that we've seen -- that we've done in the NEPTUNE study based on the great data we had in-spite of that taper, we saw no need to change that and are excited to be bringing that forward and really hopefully setting up a new standard for uveitis clinical trials in terms of what therapies should be expected to demonstrate. And we did have a productive meeting with FDA over the summer and this design incorporates their input and we're confident that if we're able to deliver successful results, it will support an NDA filing. Okay. So all in all, really a lot of excitement around NIU, around the NIU program and brepo's potential there. Did want to highlight as -- briefly before handing it back to Matt, as Matt mentioned, actually, although we're very excited about the Phase 3 NIU program, even before that, we're going to have a readout of the Phase 3 dermatomyositis program, which is fully enrolled and we'll be reading out next year. And I just wanted to highlight on slide 21 that similar to NIU, this again really meets the criteria of the attributes that we've seen being conducive to a very rapid blockbuster revenue potential indication. Again, prevalence of around 40,000 adults in the U.S., very high percentage of these patients are in the active treatment funnels, I'll walk through on the next slide. This is a very-high morbidity indication with really nothing available for patients in terms of modern therapies, mostly just steroids and IVIG, and again, concentrated prescriber base. Our claims analysis suggests that about half of these patients are treated at a few hundred tertiary centers of excellence. And on slide 22, this provides just a bit more color on kind of what these patients are currently being treated on and where they stand. You see on the left here, as mentioned for around 35 patients in 2022 actively treated with late-stage therapies for dermatomyositis. Notably, all of the steroids referenced here are oral or injectable and in no cases did we count topical steroids. And you can see on the left-hand side of the slide that over 50% of these patients are treated with polypharmacy. So I think it really goes to how sick they are and how limited the efficacy of the currently available treatments are. And then you see on the right-hand side, a different kind of the same data, which just looks at for any patients on each of these supposedly-steroid sparing therapies in terms of ISTs, biologics and IVIG that they're not really achieving that goal in terms of steroid sparing with over 50% of patients or some groups roughly 50% receiving greater than 10 milligrams per day of oral steroids chronically. So we're really excited about the DM data readout and we think that if brepo is approved, this claims analysis really supports a large bolus of potential demand for rapid adoption early in the launch. So before handing it back to Matt, really just to wrap up my section on slide 23, we've been working on really just, as Matt mentioned, development execution over the last few years at Priovant. And I think starting next year, that really tees us up to have some major value inflection with the upcoming Phase 3 data in DM, NIU study to follow soon behind that. We are also planning to start studies in additional orphan indications in 2025, and as I mentioned at the beginning, doing all of this into an environment with quite a few commercial tailwinds. So really excited about what's ahead. And with that, I'll hand it back to Matt.