Naimish Patel
Analyst · Morgan Stanley
Thank you, Brian. So at our Dupixent R&D event last June, we dove deeply into the biology of type 2 inflammatory diseases and explained why unlocking both IL-4 and -13 are critical for Dupixent. The mantra was, it takes 2 to tackle type 2 inflammation. And I'm now thrilled to introduce Sanofi's next wave of molecules for type 2 diseases beyond Dupixent. So our approach of developing the next wave of molecule really leverages our deep understanding of the type 2 inflammatory cascade. Here is a very simplified depiction of the process. On the left here, type 2 inflammation starts with allergens or pathogens contacting the epithelial barrier surfaces, such as the skin, airways or GI tract. This leads to alarming events with mediators such as IL-33 or TSLP. And in the next step, OX40, OX40-Ligand costimulation plays a critical role in immune programming with Th2 cell differentiation, expansion and memory T cell formation. This is well -- this is where you can almost say the blueprint is created for chronic inflammation and chronic disease such as atopic dermatitis. These cells then produce cytokines such as IL-4, IL-5, IL-13. And these cytokines stimulate and prime effector cells like eosinophils and mast cells, and they lead to tissue pathology, allergic responses and symptoms such as skin itching, thickening and atopic dermatitis. So from this, you can easily see how the mechanism of Dupixent in blocking IL-4, IL-13 potently inhibits type 2 inflammation in diseases such as atopic dermatitis, type 2 asthma and CRSwNP. You can also see how rilzabrutinib, a molecule acquired by Sanofi with the Principia acquisition, targets type 2 inflammation. The BTK enzyme drives allergy by mediating B cell expansion and production of IgE and activation of mast cells, eosinophils and basophils. Thus, rilzabrutinib, a potent and extremely specific BTK inhibitor, we believe, has a significant potential to treat type 2 disease. And as another example of how Sanofi is really leading with innovation, I will share with you in just a moment 3 new programs for rilzabrutinib that will start this year. But there are more areas to explore. We are also looking upstream in this pathway to develop therapies that afford potential to treat diseases that are not just purely type 2, but also nontype 2 and mixed phenotype. This is where our anti-IL-33 monoclonal antibody, itepekimab, is being investigated to reach more COPD patients than any other biologic has attempted. And today, I'm excited to share with you for the very first time the compelling Phase II data that led us to launch our Phase III trials in COPD. And finally, we believe that OX40-Ligand is truly a unique target for type 2 diseases because it represents a critical costimulatory step that leads to the programming of immune response for chronic diseases like atopic dermatitis. The Kymab KY1005 monoclonal antibody, that Sanofi announced intention to acquire, holds promise to reprogram immune response so that durable disease control may be approached for across -- approached across a number of indications. And we look forward to discussing more about the promise of anti-OX40-Ligand once the acquisition of Kymab is finalized later in the first half of this year. So now we'll dive deeper into these key molecules, starting with itepekimab, our anti-IL-33 for COPD. So itepekimab could be the first molecule to treat most COPD patients. And on a personal note, as a pulmonologist who's been practicing for a number of years, it's quite disheartening to think that so few new mechanisms have entered the COPD treatment paradigm over the last 20 years despite the fact where COPD is a leading cause of mortality worldwide. But today, I'm glad to say we really believe that we think we're about to change this. We think -- we took the unique step of studying itepekimab across a spectrum of moderate to severe COPD because of the known effects of IL-33 on both type 2 and nontype 2 inflammation. This is supported by published data, shown here on the left in the graph, demonstrating that IL-33 levels in advanced COPD patients who are former smokers are elevated compared to healthy controls. And here on the right, for the first time, we're revealing the results of our Phase II study of itepekimab in COPD. In this study of moderate to severe COPD patients, itepekimab reduced COPD exacerbations by approximately 40%, 4-0, 40% in former smokers. And importantly, this effect was similar in type 2 and nontype 2 patients. This effect size is far and above what has been seen by any other biologic in COPD, where many competitor Phase III studies have been 20% or less in terms of exacerbation improvement. And this is for the sickest patients with COPD. And these results have given us confidence to commence the Phase III program in a population where no biologics have succeeded. Thus, we have started our pivotal program with itepekimab. The objective of these studies is to establish that itepekimab can reduce COPD exacerbations and remove -- and improve lung function in most patients with COPD. This, in combination with the Dupixent COPD program, has the potential to address greater than 80% of patients with COPD with frequent exacerbations. Turning now to the rilzabrutinib program. We believe this molecule, that came to us with the Principia acquisition, has the potential for a pipeline in a product, and I'll explain why. So I mentioned in the first slide that BTK is a key driver of allergy and activation of type 2 inflammatory cells. And it would be logical then that BTK is a potential strategy to treat type 2 diseases such as atopic dermatitis, asthma and urticaria. The problem has always been that many of the early BTK inhibitors that were first used in oncology indications in the past have tended to have significant side effects, often because of binding and inhibition of other proteins besides BTK. And the reason why we're so excited about rilzabrutinib is that it has been designed to try and avoid these issues as Principia's innovative Tailored Covalency platform. So Tailored Covalency, what does that mean? It -- that means the drug has 2 binding sites on the BTK protein, one of which is a reversible covalent bond. These 2 sites essentially fit like a lock and key, increasing the likelihood that the drug will bind to BTK, but making it less likely that it'll have unintended binding to other enzymes. And thus, Tailored Covalency has a potential to minimize off-target binding and minimize the risk of side effects by still -- but still maximizing potency. And safety is a critical issue for type 2 diseases, especially among dermatologists, and we believe that rilza has the potential to deliver it. Now what is the evidence to support this potential and our commitment to further investigate this product? It is a result of the studies with rilzabrutinib. And on this slide, on the left, you see the Phase II results in patients with pemphigus vulgaris treated with rilzabrutinib. In this study, 67% of patients treated with rilzabrutinib achieved minimal disease activity by 24 weeks. This shows the very rapid and potent effect that rilzabrutinib has on this disease where very few patients would have such a response on steroids alone. On the right here, in the ITP Phase II study, you can see that 50% of patients treated with rilzabrutinib for greater than 12 weeks achieved the primary end point of 2 or more consecutive platelet counts greater than 50. This is a significant result when you consider that these patients had failed a median of 6 other therapies before entering this study. And most importantly, for both of these programs, rilzabrutinib was well tolerated with no significant safety issues. So now we would like to reveal our plans for the rilzabrutinib program. Our goal is to develop rilzabrutinib as a pipeline in a product with expansion beyond the typical autoantibody diseases into the type 2 space. We know for type 2 diseases, safety is of major importance to patients and prescribers, and so we believe rilza, via the Tailored Covalency platform, may be the right molecule to achieve this high bar with oral route of administration and meaningful efficacy. This target profile may be ideal for patients with less severe disease as an option before going to biologics. Thus today, we're announcing our plan to start the Phase II studies for rilzabrutinib in atopic dermatitis, in asthma and chronic spontaneous urticaria. These diseases represent a total of 3.5 million patients with high unmet need. And each of these indications is expected to enter the clinic in the second half of this year. So on my concluding slide here, I want to provide you with an understanding of how we're thinking about these multiple, potential first-in-class or best-in-class molecules in the type 2 space. You saw in Brian's earlier presentation that compared to other disease areas, we're still in the very early days of type 2 disease. Indeed, it's an exciting time for patients with many potential entries into atopic dermatitis, asthma and possibly even COPD. Starting with atopic dermatitis on the left. We are building on the foundation of our successes with Dupixent. This is a very underpenetrated market with heterogeneity in biology and in patient needs. There is space, we think, for multiple molecules that offer choices to patients to tailor to their biology and individual needs. We're excited about promising oral programs of rilzabrutinib and the IRAK4 degrader. We also look forward to exploring the potential of anti-OX40 once the acquisition of Kymab closes. Moving now to the right to the respiratory realm. We're pursuing oral and type 2 plus approach in asthma with rilzabrutinib to provide patients with potentially the first oral treatment to enter the asthma space for some time. We also believe that the next wave of transformative molecules in diseases like asthma require a multitargeting approach to provide step change over current efficacy. And we'll get into this in more detail in the next session with the IL-13 TSLP program. And finally, we have the high ambition to transform COPD therapy with itepekimab now in addition to dupilumab to address greater than 80% of patients with COPD where currently there are no biologic therapies. And with this, I hope I've been able to convince you that Sanofi has a lot more coming behind Dupixent with an immunology pipeline rich in potential first-in-class and best-in-class molecules. For more information now on our next generation of molecules, including Nanobody bispecifics program, degrader programs and really cool science, I will turn over to Frank Nestle, Sanofi's Global Head of Research and Chief Scientific Officer.