Ionis Pharmaceuticals, Inc. (IONS) Earnings Call Transcript & Summary
September 18, 2020
Earnings Call Speaker Segments
Jason Gerberry
analystGood afternoon and good evening, everybody. Thanks for joining us for our final company presenter at the BofA Global Healthcare Conference. My name is Jason Gerberry, smid-cap biotech analyst at BofA. And I'm pleased to be introducing Ionis and Brett Monia, CEO of Ionis. And Ionis, for those of you on the line who don't know, is a leader in antisense oligonucleotide therapeutics, or ASOs as we may refer to them on the call. So first off, Brett, thanks for joining us.
Brett Monia
executiveThank you, Jason. It's a pleasure to be here.
Jason Gerberry
analystYes. So hopefully next year, we'll actually be in London, but maybe we can just start big picture. And I think it's timely, given you'll have updates in the fourth quarter around new dosage form, or say new routes of delivery, for ASOs potentially between inhaled between oral ASOs in the second half. So I guess maybe can you help frame for us how important the data updates that we'll get around these routes of delivery will be? How derisking do you view the data updates that we'll get if the data pan out as you hope that they will? Just trying to get a sense of how we start to think about how this opens up the opportunity set for Ionis as a drug developer.
Brett Monia
executiveSure. Happy to. Jason, we've been at this in opening up new opportunities for target new organ systems and new cell types with oligonucleotide therapeutics for decades, for a long time. And we were the first to work in the liver, and in certain other organ systems, first to apply our drugs intravitreally for eye diseases, the first to validate intrathecal delivery for central nervous system, neurodegenerative diseases. And we think we're getting close to doing this for pulmonary diseases by delivering our drugs by aerosolization as a once a week delivery to the lung for pulmonary diseases. And also, we think we're getting close to commercially viable oral delivery as well. And as we said, we're planning -- we've been working on this very hard with -- through medicinal chemistry, principally and really optimizing the chemistry for both routes. And we are planning, as you said, to provide an update from our pipeline on clinical studies involving both routes of delivery later this year. The pulmonary program is -- involves our ENaC program, so a channel on the epithelium in the lung. And this drug is now in Phase II studies in patients with cystic fibrosis, and that study will read out next year. However, we're planning to provide an update from our ENaC program from our Phase I data as well as an update on the development program later this year, in which we're going to be sharing data providing the justification, the rationale for the approach, the preclinical data, the clinical data showing target engagement, safety and tolerability. And we think upon achieving robust target engagement with good safety and tolerability, it really opens up a big opportunity for pulmonary diseases like IPF, COPD, cystic fibrosis, other types of lung diseases. So -- and the only other thing I'll say there is that we have 2 other drugs in development right behind an ENaC for pulmonary diseases. So we think that this is going to be another dimension to drug discovery for antisense drug for pulmonary diseases. We're also planning, as I mentioned, an update on the oral program later this year. We've been working on oral for quite some time using both formulation strategies as well as chemistry strategies for our drugs. And with our partner, Astra -- AstraZeneca, we've done a lot of preclinical work in animal models, dogs, rodents, monkeys, really demonstrating the proof of concept in those models that gives us the belief that we've tackled a commercially-viable oral delivery as a once a day pill. We're now in the clinic to prove that, and we're going to share that data later this year. We're going to share the preclinical data. And we're also going to provide the justification, the rationale and an update on the clinical studies that we believe will support commercially viable oral delivery. And your question about how significant would this be? Quite significant. It could really open up oral delivery for a large segment of our population -- I'm sorry, of our pipeline. That gives us a significant competitive advantage over other modalities. So it could be a real big deal. And we're looking forward to sharing those results later this year.
Jason Gerberry
analystThinking about ENaC and the inhaled opportunity, obviously with ASOs, an important challenge historically has been preventing degradation of the ASO so that it can get to its target site. So how broadly transferable would the findings be if you can drug ENaC as a target to some of these other respiratory conditions that you alluded to? Just trying to get a sense of what one can infer and extrapolate from a positive finding there.
Brett Monia
executiveYes. That's one of the big advantages of a platform technology, right, is when you're within a chemical segment of your platform, which we would be here in pulmonary diseases, it would be directly applicable to many other drug targets for many other disease indications. So what we learned from the ENaC program would be -- would really, really propel us into -- and give us the confidence that other drugs are going to work for diseases like idiopathic pulmonary fibrosis, where we have a drug coming to our genetic cause of IPF and COPD as well. So -- and the same is true for oral because the chemistry is the same from drug to drug and the formulations that we'll use are the same is directly applicable, just like it was in the CNS when we validated SPINRAZA and intrathecal delivery for CNS diseases, and we showed we can get broad distribution in the brain, in the cord, and we can show knockdown in or up-regulation in the case of SMN. It was directly applicable to Huntington's, and ALS, and Parkinson's, and Alzheimer's and so on. So it's a huge advantage of being a platform technology. When you validate a new route of delivery, you then open up a large opportunity for drug discovery.
Jason Gerberry
analystGot it. Great. A lot those lines, thinking about your more established, I guess, chemically modified ASOs or LICAs, as we think about the ongoing safety debate between RNAi versus ASOs, where do you feel like you are in terms of validating the LICA platform? I think in the past, you've talked about largely the consistency, consistency of target knockdown and safety seen across LICA as the thing that gets you most encouraged. But wondering if you can just chime in on that topic and debate on where you think you're at?
Brett Monia
executiveI think, there really -- there's never a real need for a debate on the safety of our LICA technology anymore. We really have so much data validating this strategy, both from an efficacy, and safety, and tolerability and patient convenience standpoint, with thousands of patients now treated with LICAs across 15 or 16 different LICA drugs in clinical testing, validated, not only by -- well, Ionis says, but validated by our partners like Novartis and Bayer and AstraZeneca and Pfizer, who have really doubled down on Ionis' LICA platform. And they are now in the midst of Phase III and large Phase III studies and large Phase IIb studies with this platform. Really demonstrated the confidence they have, not just us, in the performance of these drugs and the safety and the convenience and tolerability of these drugs. As I mentioned, we have now more than well over 1,000 patients with patients treated over a year with our LICA drug showing exquisite pristine safety tolerability with reproducible potency as once per month subcu injection. Or even less frequent, we can go to less frequent injection if we felt that there was a competitive reason to do so. And our LICA platform today is principally focused -- is entirely focused in the clinic on liver LICA. So as I said, we have 15 clinical studies from Phase I through Phase III, using liver LICA drugs, our own drugs as well as -- that we're developing as well as our partners. But liver LICA is just the beginning, Jason. We have now -- we're developing LICA chemistries for a whole range of new organs and cell types that precisely deliver our drugs to the cell type that we want to deliver the drug to. The hepatocyte for liver LICA, we're now on the verge of succeeding in muscle for muscle diseases, for example, like myotonic dystrophy or Duchenne's or heart muscle for heart failure, directly targeting the heart cardiac myocytes. We're also making great progress in immune cells for immune disorders or even in cancer for immuno-oncology. And we're also developing strategies for the lung epithelium to make the drugs that we're delivering there even more potent. So lot of experience with liver LICA. The experience really, I think, validates this strategy. And we're expanding it now to other organ systems. And we're hoping to provide an update on some of these other LICAs later this year as well.
Jason Gerberry
analystGreat. Great. And so before we jump into some programming-specific questions, just the -- I wanted to quickly touch upon the recent Akcea update in transaction. And so maybe if you can talk a little bit about how you're envisioning any changes to the commercial strategy behind TEGSEDI and WAYLIVRA once the products are, I guess, under your control as a marketer? Or given the prior arrangement if you had a lot of input into those decisions, perhaps there's just not a lot of change, practically speaking. Can you maybe just speak to that dynamic?
Brett Monia
executiveYes. We're very -- I am personally, and the leadership team at Ionis, is very excited about the reacquisition of our commercial affiliate Akcea. Ionis is well recognized -- has been well recognized for decades as a leader in R&D innovation, and we're proud of that. And scientific innovation will always be at our core. It makes us what we are. And we've proven that with the pipeline we've created and the drugs we've brought to the market. The acquisition of Akcea and the building of our commercial capabilities really represents the next step in our evolution. It's the right time now with us having proven the platform, having proven the technology and on the verge of delivering a vast increase in the number of products to the market over the next few years. We're projecting 10 or more new drug applications through 2025, starting potentially next year with our ALS drug. With that now proven, it's now time to expand our vision, expand our scope to our own pipeline, in addition to partnering when it makes strategic sense to build our pipeline, and to bring products through the finish line, through Phase III and to bring products through commercialization ourselves. The acquisition of Akcea and all the great things that they've accomplished over the years, particularly the commercial capabilities that they've built, the partnerships that they created and so on, it's a great addition to Ionis. And it is the next step, and it is a key step in us building our commercial capabilities going forward. So we're very excited about it. And it's not a shift. It's really a step in our evolution, I would say.
Jason Gerberry
analystGot it. Great. Maybe shifting gears to SPINRAZA just because it's obviously topical, probably will be topical for the next few quarters, just given the PTC Roche launch of risdiplam. I guess the COVID-19 backdrop, there was at least anecdotal feedback around maybe physicians using less medication because of emerging evidence that you could perhaps administer less frequent critical therapy. Any color or commentary you can provide how the pandemic backdrop is impacting SPINRAZA utilization maybe first?
Brett Monia
executiveSure. SMA is a severe disease. And depending on the type, type 1 is a lethal disease. Type 2 is a lethal disease. Type 3 patients have very serious symptoms, but they have normal longevity, lifetime longevity. My point is that there's a need for drugs to treat SMA and patients. And physicians find a way to get them to get access to drugs even in a pandemic. With that said, there has been some impact on the commercial revenue for SPINRAZA that was encountered in the second quarter. Biogen reported a slight dip in revenue in the second quarter compared to the first quarter. Prior to that, we were achieving quarter-over-quarter growth for SPINRAZA each quarter. That was due to the peak of the pandemic, and there was some impact and some misdoses and those sorts of things. But that is largely behind us now, and Biogen, our commercial partner is expecting continued growth for SPINRAZA now that the pandemic is -- not behind us, but is manageable. And the other thing about SMA that Biogen has done a great job doing is identifying more patients. The prevalence of SMA appears to be much larger than what we originally planned -- expected. Now it's north of 60,000 patients with SMA. When we first started our Phase III studies with SPINRAZA, it was estimated to be about 30,000, 35,000 patients. And these are patients all in countries, geographies, where SPINRAZA is available today. So we think there's still plenty of real solid upside for SPINRAZA growth going forward.
Jason Gerberry
analystYes. It seems like the international opportunity is important for growth and where you still have the lead in terms of market versus newer competitive alternatives. What I wonder maybe more medium-term to longer term, how quickly could you be in a position to be rolling out potentially intrathecal versions of SPINRAZA, where you only have to give it every 6 months or perhaps even a year?
Brett Monia
executiveYes. We -- as we're doing with oral and pulmonary as with in LICA that we talked about earlier, where we continue to work and further optimize our medicinal chemistry for CNS applications. We're doing that here at Ionis. We're doing that with our partner Biogen and we're doing it with Roche. And we're making a lot of good progress. We think that we're getting very close to biannual or annual intrathecal dosing through, basically, stabilization of the molecule to increasing the half-life in the CNS. And I think we're going to be in a position to -- with Biogen, to put a follow-on for SPINRAZA into development next year. And our target is, at a minimum, twice a year dosing, but our real goal is annual dosing. And it's looking good. We're still -- we're in the late stages of research, and I think we're getting close to picking a candidate.
Jason Gerberry
analystGot it. Great. And just lastly on this, before we jump to more of the pipeline. But Roche, I think, had some comments that 25% of patients with type 1 and 2/3 of risdiplam patients, previously, I guess, were treated with SPINRAZA. I'm wondering, I suspect these aren't switches, that perhaps these are just patients who maybe have dropped off therapy due to tolerability reasons. But can you address that dynamic? Do you have the sense that, at least in markets where risdiplam is available, is there meaningful switching? Or is there a meaningful number of patients out there who, for whatever reason, spinal scoliosis, couldn't get SPINRAZA and are now candidates for risdiplam?
Brett Monia
executiveYes, Jason, it's really too early to make those calls. It's really to our early to tell. We're just beginning to gather data on impact of risdiplam on SPINRAZA's commercial growth. Biogen is doing a lot of that work, and we're working -- and they're communicating that to us. It's really too early to tell. SPINRAZA, as I said, I think, before, is the standard of care, foundation of medicine for all forms of SMA for more than 50 countries reimbursed around the globe. Prevalence is higher than what we originally were projecting. And it's going to continue to grow. Risdiplam is going to be a significant competitor. We're not disputing that. But risdiplam also has a very high bar to meet with, that SPINRAZA has created, a high bar on efficacy and safety in the long term. With more than 11,000 patients of SPINRAZA around the globe today, there's a lot of catching up to do. As for statements anyone has said on the competitive side on who is switching or what patients are going on to risdiplam or not, I really can't comment on that. I don't have data that I'd be confident to comment on that right now.
Jason Gerberry
analystOkay. Maybe shifting gears to Huntington's and HTT ASO, very interesting program and obviously a very large underserved market. I think in the past, one of the debates and topics around HTT ASO is whether or not it truly crossed the blood-brain barrier, like it does in animals. And I think in the past, you guys have talked about drawing comparisons to SPINRAZA, autopsied humans to make the point, I think, that the drug can get into the brain. Can you elaborate on that point? Do you think any of the chemical modifications between SPINRAZA and HTT ASO are just not significant enough to matter when it comes to that drug delivery debate point, if you will?
Brett Monia
executiveSo remember that we have -- we're delivering our drugs for neurodegenerative diseases intrathecally. So these aren't systemically applied. They don't need to cross the blood-brain barrier. They don't cross the blood-brain barrier. That's why we delivered them intrathecally. We have proven this platform for neurological, neurodegenerative diseases for CNS in the spinal cord and the deep structures of the brain in the surface structures of the brain. In so many ways in the clinic with SPINRAZA, with SOD1-ALS, with our knockdown of Huntington and so many other programs that you'll be hearing about more in the future, which we're getting really remarkable reductions in target levels in patients with all kinds of neurological diseases. The chemistry platform, like we talked about for some of the other applications earlier, is directly transferable applicable to -- from one drug to another within a chemical class. So what we've learned from SPINRAZA, it's a different mechanism than Huntington, is still directly applicable to Huntington, as it is to SOD1-ALS and C9 ALS and all of our other drugs for neurological diseases. We know that in Huntington we've demonstrated, in patients, remarkable reductions in mutant Huntington. That's durable, long-lasting and is well within the range that is predicted to show benefit based on a wealth of preclinical data. So it is directly applicable. We're delivering our drugs by IT. And we're delivering them infrequently, every couple of months, every 3 months or every 4 months. It depends on the program. So it's -- we're getting -- we're extending those intervals for treatment as well for our CNS programs. But we do -- we believe that this route of delivery is well validated with our platform.
Jason Gerberry
analystGot it. Great. Now the natural history of the population, I think to some degree, there have been a number of natural history studies that have been done, but I don't believe that there are any that have actually included CSF biomarkers. So I'm just trying to get a sense of is that sort of like the key kind of part of the hypothesis that you explore? And the key unknown in all this is sort of that dynamic between modulating CSF biomarker versus having an impact on functional outcomes for these patients. I'm asking as we think ahead to we'll get, I believe, 15-month natural history data next year from your partner. So -- and then you have the 25-month endpoint for your clinical study.
Brett Monia
executiveRight. So there really aren't great biomarkers for Huntington's disease. What there is, is a wealth of published data studying the course of this disease, the disease progression of this disease over years, looking at various rating scales like the Huntington's Disease Functional Rating Scale, which measures psychological, cognitive, motor functions, activities of daily living, quality of life. These different domains within these rating scales that have been shown and have been refined over, and over, and over again for years, to really be highly quantitative measures of disease progression during the decades in which Huntington's disease progresses. Well published, excellent natural history data to build on. This is the primary endpoint in the Phase III studies, the Huntington's disease, the composite Huntington's disease functional rating scale, which is well received by the FDA and the EMA and so on. And this is the, as I said, the primary endpoint in the Phase III study. This will also be what's looked at in the open-label extension date -- and let me just remind you that the Phase III study for Huntington's is fully enrolled and is due to read out in 2022 and potentially file for approval in 2022, with our partner Roche. So in addition, the open label data, the 15-month data that you referred to, which is an extension of the Phase II study that we ran that led to the licensing of the drug by Roche, the 15-month data will be presented next year by Roche, an update on that study by Roche next year, in which they'll be looking at and they'll be presenting data on the durability of new reductions, the safety, the tolerability of the long-term treatment. And then we'll also be looking at components of clinical endpoints, including components of the rating scale that I referred to earlier. So it will be very interesting over 15 months. In addition, Roche initiated a natural history study that this study is following the progression of the disease, the clinical progression of the disease in patients over 15 months in a population that is very similar to the Phase II patient population that we studied. So it's kind of like a mirror image of that population. And it's kind of like it will serve as a reference to the open-label extension study now. And they're providing an update on the natural history study next year as well. So that's something to look forward to is an update on the treatment group, the open-label extension as well as the natural history study next year. And they'll be looking at clinical endpoints that are comparable to the Phase III clinical endpoints in that update next year.
Jason Gerberry
analystGot it. And I guess thinking about your patient numbers, your level of patient follow-up, I know one of the debates is are you knocking down too much Huntington protein potentially? Do you have the right balance? I know that there was the debates around neurofilament light chain, but then I think you showed follow-up data that suggest that, that was transient and returned to normalized levels. So I guess where do you feel like do you feel like that debate is put to rest once you've got additional data from the Phase I/II exploration?
Brett Monia
executiveWhen we first started the Phase III study as we did in our -- as we look at in our Phase II study, we were looking at monthly dosing as well as bi-monthly dosing. And in the monthly dosing, we saw really dramatic reductions in mutant Huntington levels as we did in every 2-month dosing. But in the monthly dosing, we saw in a handful of patients a mild elevation of neurofilament light chain in those patients, and we had more adverse events. A lot of those adverse events were due to intrathecal bubbles injections, which are more frequent and sometimes would give you an inverse event. There was no relationship between neurofilament light chain and adverse events or serious adverse events or anything like that. There's no correlation with side effects. In addition as you mentioned, they were mild and they were transient, but they were principally seeing in the monthly dosing. The other thing we learned was that we didn't need to dose monthly to get the knockdown of new Huntington that was predicted to show efficacy. And in fact not only was every 2 months dosing enough dosing to get us well below the threshold where it's predicted based on preclinical data to show efficacy, our modeling showed that we can actually go to triannual, every 4 months dosing, and be well within the range of mutant Huntington knockdown to show efficacy, robust efficacy, predicted robust efficacy, without the effects on NFL, neurofilament light chain or any other AEs that were associated with monthly dosing. So that's when the Phase III study pivoted to every 2 months dosing, every 12 months dosing. And Roche provided an update on that this year at the Huntington Disease meeting, which they provided all the rationale for that in which the bimonthly and every 4-month dosing was justified based on the knockdown of the Huntington levels we're getting in both treatment regimens. And with the data that supported the conclusion that we were well within the efficacy range and thereby avoiding the increases in neurofilament light chain that we were seeing as well as any AE. So that's sort of the experience there with NFL levels in the dosing regimens.
Jason Gerberry
analystGot it. Great. Maybe we can shift to your ALS program. First up would be the Phase III readout for tofersen. I believe that's next year. Obviously, an extremely challenging area of drug development ALS. Now you sought one mutation. I think it's 2% of the ALS population, so it's small. But can you speak to -- if you can replicate Phase II success in this setting, to what extent does this offer any read across to your broader ALS programs in other patient segments, including sporadic disease?
Brett Monia
executiveYes. It's really an exciting franchise we have for ALS that's emerging. Huntington's disease is caused by -- it's a monogenic disease. It's caused by mutations in the Huntington gene, the CAG expansions. Unlike Huntington's, ALS has multiple causes of -- there are multiple causes of ALS. There are genetic causes in which there are several different genes that are mutating that cause ALS. And then there's the sporadic ALS, which is 80% or so of ALS patients suffer from nongenetic causes of ALS. We're -- we have drugs for all forms of ALS in development today, sporadic and various forms of genetic. The lead drug, tofersen, that you referred to, targets -- is in Phase III development and targets SOD1-ALS patients, patients that have ALS due to mutations in the SOD1 gene. We showed, with our partner Biogen, in Phase II, and after only 3 months of treatment, patients were doing better, with -- that are on drug compared to placebo. Which was truly remarkable because as you said, this has been a difficult, essentially impossible area, historically, to have any sort of disease-modifying effect in ALS with any kind of drug. We believe we're there. We believe we're on the verge of proving this in Phase III based on the strong Phase II data, which we also showed very potent reductions in SOD1 levels in that study. And based on that, we moved into Phase III with Biogen which is in -- is a 6-month treatment study, so twice as long as the Phase II. And SOD1-ALS patients in this study will read out next year. So we believe that this will be our next product to reach market. And this -- our SOD1-ALS drug, we believe, portends very favorably to all forms of ALS. We have another genetic form of ALS that we're targeting called C9ORF. The gene mutations in the gene is called C9ORF. This is about 5 to 6x larger population than SOD1, and we're in Phase II for this -- with this drug now in C9 ALS patients. And that too will read out next year as projected too. So next year is a big year for ALS, SOD1 Phase III, C9 Phase II data. We also have a third drug for a genetic cause of ALS starting with in a gene product called FUS. We're expecting to start Phase III development ourselves, Ionis, with -- in FUS-ALS next year. And then finally, sporadic ALS that you asked about, the largest population, sporadic nongenetic ALS. We have a drug that's about to start Phase II testing with Biogen that is targeting a gene called ataxin 2, which if it works, based on our preclinical data, we think -- has the opportunity to treat all forms -- all patients with sporadic ALS. This will start any day now, really, dosing in patients with sporadic ALS. And it is the first and very important one and very exciting one, but still the first of several eggs -- drugs for sporadic ALS, that we're expecting to reach development in the future.
Jason Gerberry
analystGreat. That's really helpful. And thinking about the Phase III trial for SOD1, can you talk a little bit about how rapidly these patients progress? You mentioned that you're going to an endpoint that's nearly double the duration. I think you're going from a Day 1 97 endpoint from a Day 85 endpoint in Phase II. And so just wondering how you thought about that when designing the primary endpoint in order to ascertain a separation between your ASO and the placebo arm on the ALSFRS endpoint?
Brett Monia
executiveWe saw, in the Phase II study after -- during -- after 3 months of treatment, strong trends in stabilizing ALS progression in our treated patients versus placebo for the overall population in Phase III. But when we drilled down a little bit more, and we studied those patients with certain types of SOD1 mutations that cause the disease to progress very rapidly, we saw really dramatic differentiation between treatment and placebo. Depending on the nature of the mutation -- of the nature of the SOD1 mutation you have, you could be classified as a -- what they -- what we refer to as a rapid progressor. These patients rapidly progressed. Over just a few months, their disease deteriorates very quickly. And that's what we saw, was for the rapid progressors in the Phase II study, they were falling -- they were degenerating very quickly, unfortunately. But our patients treated with tofersen were completely stable, both on lung function as well as a rating scale called the ALS Functional Rating Scale. The reason why we went to a longer treatment period in the 6 months is because we expect that the less rapid progressors -- ALS progresses rapidly always. But there's faster progressors and there's regular progressors. Over 6 months, we would expect the regular -- the patients that would progress more normally with SOD1-ALS to also show a real differentiation from treatment in the Phase III study. So we went from 3 months to 6 months in the study to capture benefit in all patients with SOD1 mutations in that study.
Jason Gerberry
analystGot it. Now conceptually, in your view, is knocking down SOD1 ultimately stabilizing or reversing disease symptoms -- on what you know today? I'm trying to get a sense of, do you need to get early at the patient onset to prevent functional or respiratory functions from deteriorating? Ultimately trying to think through, and maybe the answer is still to be told in a larger Phase III data set will help you understand answers to these questions.
Brett Monia
executiveYes. It's -- we'll have to determine that clinically. We believe strongly that we will halt progression of SOD1-ALS in this trial. And like I said before, it portends very well for the benefit we can see in all forms of -- for our other drugs for ALS. But whether or not we can actually reverse the disease and whether or not it will be better to treat earlier versus later or even presymptomatically versus later, we'll have to see once we prove that in the clinic. And that might even require additional clinical studies. But what we do know is that for neurological diseases that we have tackled before, that we can reverse disease symptoms for certain people. Like we think -- we saw it with TEGSEDI with polyneuropathy and we've seen it with SPINRAZA, that we can actually improve symptoms in many people with SMA. And we've shown with SPINRAZA that if we can treat babies presymptomatically just based on a genetic test, those babies will largely, oftentimes -- most of the time, can develop normally. So earlier you -- we have a lot of data indicating that the earlier you treat for neurological diseases, the better off you'll be. And you should be able to -- if you can get the presymptomatic, you might actually prevent the disease from ever happening. SOD1 can be determined genetically as would be C9 as with Huntington's disease. And someday, maybe, if we prove that the drug is efficacious, we can get the presymptomatic patients with Huntington's disease, ALS, genetic forms of ALS and many other genetic forms of neurological diseases.
Jason Gerberry
analystGot it. And last question for me as we're up against our time here, but TTR LICA seems to be a program that could meaningfully alter the competitive dynamics right now in the market as defined by TEGSEDI versus ONPATTRO. And so outside of waiting until 2024 for outcomes data, can you talk a little bit about any data that you'll be generating around TTR LICA that at least will address some of the safety debates around TEGSEDI versus TTR LICA? Maybe in the polyneuropathy setting that has read across to the safety profile in the cardiomyopathy setting? Just -- it seems like you have a lot of value in these large outcome trials that are being run beyond TTR LICA, right, in terms of the APO, APOCIII and PTLA III as well, potentially, as well. So just curious more so about TTR LICA in terms of the data generation that might perceive the outcome readout?
Brett Monia
executiveAs we touched on earlier, our LICA drugs are all including TTR LICA have performed exceptionally well clinically. Potency, we're driving TTR levels down greater than 90%. TEGSEDI, we achieved about 70, 75% reduction of TTR. We're expecting even greater reductions of TTR with the LICA. And the safety profile for all of our LICAs, including our Phase I data with TTR LICA, has been pristine. During the course of this study, we'll -- remember, we have 2 Phase III studies. We have the polyneuropathy patient study as well as the cardiomyopathy that you referred to, which is a cardiovascular outcome trial. In the polyneuropathy study, we'll have data at 8 months like we did for TEGSEDI. And that could read out into late 2022, early '23 time frame for the interim analysis on the polyneuropathy. And then the cardiomyopathy as you said, late '23 or early '24, is when the outcome data is coming there. But we will be monitoring safety for the TTR LICAs throughout the study. And we'll be providing updates on how the study is going throughout those Phase III studies, just like we do with TEGSEDI. And although it will be pooled data, we won't be able to talk about placebo versus treatment and that sort of thing, we'll be able to share pooled data on the safety and how patients are doing, how the levels of TTR reduction in a pooled setting, placebo and treatment throughout the course of the study. And trust me, if there are safety issues along the way, that information will come out. We're not expecting any of these on all the LICAs that we have today.
Jason Gerberry
analystBrett, I mean, against the comparator arm, it's either going to be placebo and/or placebo plus tafamidis, I wouldn't think that your comparator arm would show any of the platelet impact that you see with the TEGSEDI. So even on a blinded basis, you should be able to factor some confidence. But perhaps around the safety profile, is that a fair statement?
Brett Monia
executiveExactly. That's what I meant when I said pooled data. Absolutely. That's a very fair statement. We'll be sharing -- we'll be able to share results on how patients are doing from a safety tolerability all along the way, as well as compliance, dropouts and all that. So -- and we know -- we're very confident that it will be very well tolerated, very safe with respect to platelets in compliance and so on. So -- but yes, that is a true statement.
Jason Gerberry
analystAll right. Great. Well we are up against our time. So I want to thank you, Brett, for joining us at our conference today. Hopefully, next year it's in person in London. And thank you to everyone who dialed in or got on their computer to listen to us today.
Brett Monia
executiveI hope we can together -- yes, I hope we can get together in London again also, Jason. Thanks very much. It was a pleasure.
Jason Gerberry
analystAll right. Same here. All right, thank you. And with that, operator, we can wrap up the call.
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