Lonnel Coats
Analyst · Citi Group
Thank you, Chas. Good morning, everyone, and thank you for joining us on the call. As we noted in our press release this morning, we remain on track to submit our new drug application for sotagliflozin in heart failure late this year. With rising confidence in our opportunity to deliver unique value in an area of high unmet need. Our confidence is supported by the data from our SOLOIST study in patients who had recently been hospitalized for worsening heart failure and results from both our SOLOIST and SCORED studies that demonstrated a reduced risk of cardiovascular death, hospitalization for heart failure and urgent visits for heart failure that was consistent across the full spectrum of left ventricular ejection fraction.
The results of these studies address the areas of greatest unmet needed heart failure. Better treatment options for patients hospitalized for worsening heart failure and effective treatment options for the large population of patients with normal or preserved left ventricular ejection fraction for whom there are essentially no approved therapies.
A series of recent developments since our last quarterly call have further reinforced our confidence in the value of sotagliflozin and validated important areas of differentiation in ways that we believe will translate into benefits for millions of people with heart failure and type 2 diabetes.
Importantly as well, we have completed the work we have described on previous calls to more fully evaluate the intended market for sotagliflozin. It has become clear that this is a market with a concentrated prescriber base 1 that we believe can be efficiently addressed with a focused and modestly sized sales force.
Slide 4. Let's get into some of the metrics of the market opportunity. Now there are nearly 1 million hospitalizations per year in the United States for heart failure. Heart failure is the leading cause of hospitalizations of Americans 65 and older, the hospitalization setting, in patients with worsening heart failure is exactly where our SOLOIST study generated important evidence about the impact of sotagliflozin.
A majority of heart failure patients have heart failure with preserved ejection fracture or HFpEF that is left ventricular ejection fraction greater than or equal to 50%. It is these HFpEF patients who are in the greatest need for effective therapies. Given that at present, they essentially have no real approved treatment options.
Finally, heart failure is very frequently associated with type 2 diabetes. Some of the most recent evidence suggest that approximately 44% of heart failure patients have type 2 diabetes, and this proportion appears to be growing over time. Patients with diabetes moreover tend to be overrepresented in the higher unmet need area of HFpEF.
Next slide. Our SOLOIST clinical trial was designed to evaluate sotagliflozin in the context of worsening heart failure. Patients who were admitted to the hospital with an episode of acute decompensated heart failure or initially stabilized then were randomized to either sotagliflozin or placebo on top of standard of care, either before or within 3 days following discharge from the hospital. About half of patients started therapy before discharge from the hospital with the balance starting therapy promptly following discharge.
This is a unique study design addressing the unique needs and challenges of worsening heart failure, and the results were compelling with a 33% relative risk reduction in the primary endpoint of cardiovascular death, hospitalization for heart failure and urgent visits for heart failure.
We recognize this was a significant risk to take in going after this population, and we were pleased with the remarkable outcome. Now why is that important? For 1 of the developments since our last earnings call that has increased our confidence in the opportunity for sotagliflozin, at the American College of Cardiology Scientific Sessions in May, data were presented from a recently completed study of a leading branded heart failure medication, a multibillion-dollar drug, which failed to show a benefit in worsening heart failure.
I believe this result came as a surprise to many attendees given the product's commercial success in heart failure. The result obviously opens an opportunity relative to the market leader, given that results from SOLOIST showed a clear benefit from treatment with sotagliflozin in people who have recently been hospitalized for worsening heart failure.
But it is also a reminder that worsening heart failure represents a distinct set of patients, that success in heart failure generally does not necessarily translate to the unique needs and challenges of this patient population and that the results of the SOLOIST study offer an opportunity for sustained differentiation giving us focus on those unique needs and challenges.
On the next slide. Turning to HFpEF specifically. Not only does the population of HFpEF patients have the greatest unmet need. It has also been growing as a proportion of overall heart failure patients. This particular figure shows how the proportion of HFpEF patients in a hospital live setting has been increasing over time. Over the years, a number of new therapies have been introduced for treatment of heart failure with reduced ejection fraction or HFpEF. But while data has -- may come from others, and we shall see so far only sotagliflozin has published data showing clear clinical benefit across the full range of a more difficult-to-treat HFpEF population.
In this regard, at the same American College of Cardiology Scientific Sessions in May that I mentioned above, Dr. Deepak Bhatt presented pull data from SOLOIST and score shown here, demonstrating sotagliflozin's benefit across the full spectrum of left ventricular ejection fraction, including patients with reduced ejection fraction below 40%, patients with mid-range ejection fraction between 40% and 50%, and patients with preserved ejection fraction greater than or equal to 50%. We believe that the data presented were very well received as the current leading branded heart failure medication is indicated with a label outlining that benefit was seen primarily in patients with below normal left ventricular ejection fraction, and there are no approved therapies for people with ejection fraction equal or greater than 50%.
You can clearly see in these data the impact of sotagliflozin on all patient populations across the entire spectrum of left ventricular ejection fraction. In the traditional HFrEF population, ejection fraction less than 40%, there was a 22% relative risk reduction and the primary endpoint of the studies of total cardiovascular death, hospitalizations due to heart failure and urgent heart failure visits. In the mid-range ejection fraction, there was a 39% relative risk reduction. And on the right, you see that a highly significant relative risk reduction of 37% was achieved in the HFpEF population, a robust result that has not been seen from any other therapy to date.
So to recap, we have rising confidence in the opportunity for us to bring sotagliflozin to market. Importantly, in the United States, which we think is the most substantial market opportunity with or without a partner. We have compelling data from SOLOIST and score that address the areas of greatest unmet need in heart failure, better treatment option for patients hospitalized for worsening heart failure and effective treatment options for a large population of patients with HFpEF for whom there are essentially no approved therapies.
We believe that this will be a rapidly growing market. It may actually grow more rapidly if there are more treatment options for HFpEF, which represents a majority of heart failure patients going home to date, there have been no truly effective options. Importantly, this is a market that our work in the case can be addressed with a focused, modestly sized sales force. These factors combine to give us the opportunity to generate significant value by bringing sotagliflozin to market on our own and/or to set a bar by which to judge the value of any potential partnership.
Finally, we are encouraged by the feedback from our recently completed pre-NDA meeting with the FDA, which is added to our sense of urgency and factored into our decision to accelerate our efforts to prepare for potential U.S. commercial launch in 2022.
One of the important elements of this acceleration of these preparations was just announced this morning. This coming Monday, Dr. Craig Granowitz will be joining us as our Chief Medical Officer. Many of you probably know Dr. Granowitz who has been -- who has extensive industry experience and scientifically differentiating cardiovascular medicines as demonstrated by its track record at Amarin and Merck, among others. Craig has a lot of work ahead, and we welcome him to our leadership team.
Now on to type 1 diabetes. We continue to believe that sotagliflozin demonstrated a positive benefit risk profile in the largest Phase III development program ever conducted in type 1 diabetes and that it has the potential to become an important new treatment option as an adjunct to insulin for type 1 diabetes patients. We requested an opportunity for an administrative hearing with the FDA on whether there are grounds for his previous denial of our NDA for type 1 diabetes.
I am pleased to say this week, the FDA indicated that it is willing to have a good faith discussion with Lexicon on a potential path forward for the sotagliflozin NDA, and we are working with SEDAR on a joint request to hold the administrative hearing process in abeyance while those discussions are pursued. While it is early, we are looking forward to those discussions and we are hopeful that together with the FDA, we can quickly find a potential path forward.
Let me move to the next slide on LX9211. We have seen a meaningful pickup in enrollment in our 2 Phase II proof-of-concept studies for LX9211 in neuropathic pain, while maintaining as a priority of the importance a proper patient selection that is built into the study design. Our mitigation efforts have begun to take effect and the COVID-19 environment has improved relative to earlier this year, but not enough to achieve top line results by the year-end. We now expect to have top line results from these studies in the first half of 2022.
I'd like to take a quick moment to wrap up with our pipeline. We continue to make great strides in advancing our pipeline that has been built on a rich scientific platform and years of research and development. In addition to the programs that we are developing directly, we do have interest in the form of milestones and royalties and other programs that have been developed or facilitated using our technology.
We have a milestone and royalty interest relating to TerSera development and potential future commercialization up to telotristat ethyl and biliary tract cancer in accordance with the terms of the agreement under which we sold telotristat ethyl and related assets to TerSera last year. We also have a milestone and royalty interest in UTTR1147A, a Genentech IL-22Fc that is in Phase II clinical development under the terms of our long-standing target discovery and biotherapeutics alliance with Genentech. Our scientific platform continues to provide continued opportunities for value, both internally with collaborators and other third parties.
I'd like to stop at this moment and pass the call over to Jeff to walk you through our financial results for the second quarter and provide financial guidance for 2021. Jeff?