Christian Itin
Analyst · Jefferies
Thank you, Silvia. And good morning to all of you, and thank you for joining us. I'm pleased to review our progress in the first quarter of 2019 as well as some recent company highlights. Slide 5 has a snapshot of our pipeline. Each of our product candidates addresses a key issue in the development of advanced program T cell therapies. The insight that cancer cells have an inherent ability to fend off T cells using a broad range of defend strategies and mechanisms led to the development of our programs, which I'd like to quickly review before we get into our operational highlights. AUTO1 is a program designed to maintain high antitumor activity with without inducing severe cytokine release syndrome. AUTO3 aims to reduce relapse due to loss of antigen, and in combination with pembrolizumab also addresses inhibition by checkpoint. AUTO3 NG, AUTO6 NG and AUTO7 expand the capability of T cells to withstand hostile defense mechanisms by including programming modules that render the T cells insensitive to the family of checkpoints and to tumor environmental factors. Finally, AUTO4 and 5 represent a completely new approach to tackle T cell lymphoma. Now I'd like to turn to our Q1 operational highlights. Turning to Slide 7. Let's start with AUTO1 and the ALLCAR19 trial in adult ALL. Relapsed refectory B cell acute lymphoblastic leukemia in adult patients is an area of significant unmet clinical need. While most patients respond to initial combination chemotherapy regimens, once relapsed, standard chemotherapy regimens can induce a complete remission in about 10% to maximally 30% of adults with very limited durability unless patients receive a stem cell transplant. The average duration of survival is 5 to 6 months, and less than 5% of adult patients survive 5 years after relapse. The standard of care for relapsed refractory patients include blinatumomab, a CD19-targeted redirected T cell therapy. Blinatumomab has a 42% complete response rate but only modest durability of response as an event-free survival is only 31% at 6 months. Exploratory clinical trials with standard CD19 CAR T cell therapies in adult ALL, while active, showed considerable levels of severe cytokine release syndrome and severe neurotoxicity. AUTO1 has been specifically designed to address the challenges. Using a CD19 bindery in AUTO1 that has an ability to drive a physiological engagement of the CAR T cell with cancer cells and avoids the excessive immune activation of the CAR T cells observed with conventional approaches. Based on prior clinical studies looking at AUTO1 in pediatric patients, we believe that AUTO1's design might not only prevent high-grade CRS but also supports long-term persistence of the CAR T therapy. At the American Association for Cancer Research, or AACR, Annual Meeting in Atlanta last month, Dr. Claire Roddie from the Cancer Institute of University College London presented initial data from the ongoing Phase I/II ALLCAR19 trial of AUTO1 in adult ALL patients. As of the data cut off March 18, 2019, in the trial, 13 patients were leukapheresed, and products for 12 patients were manufactured, including 7 with Autolus’ semiautomated, fully enclosed manufacturing process. With regards to safety, using the Lee criteria, there were no patients with severe CRS, which is a cytokine release syndrome with Grade 3 or higher, and 2 of 10 patients had Grade 2 CRS and also received tocilizumab to manage the CRS. None of the patients were admitted to intensive care due to CRS. One patient developed delayed Grade 3 neurotoxicity following high-grade -- high levels of CAR T expansion, which was quickly reversed with steroids. Four patients died while enrolled in the trial due to progression of leukemia and due to sepsis, a common complication of advanced ALL. Nine patients were evaluable for response at 1 month, and 8 of those 9 patients or 88% had achieved a molecular complete response. One patient died of sepsis before the 1 month evaluation point. On Slide 8, we would like to provide some context on how this data fits into the landscape of ALL therapy. First, we would like to highlight the consistency between the pediatric and adult data sets for AUTO1. Both data sets show a higher than 80% molecular complete remission rate without inducing Grade 3 or higher cytokine release syndrome by Lee criteria. Encouragingly, the 12 months' event-free survival for the pediatric patients was 46%, and overall survival at 12 months was 63%. Finally, persistence for the CAR T cells in children was excellent. The most recently approved products for the treatment of adult patients in -- with ALL are blinatumomab targeting CD19 and inotuzumab targeting CD22. Blinatumomab is, like the CAR T therapies, a redirected T cell therapy that is fully approved across all age groups of ALL. The CR rate is 42% with a molecular response rate of 28% and with an event-free survival at 6 months of at 31%. Blinatumomab was approved as a breakthrough by the FDA in 2014. While Kymriah, a CD19-targeting CAR T therapy was approved in pediatric patients in 2018, no CAR T therapy has been approved for adult ALL patients to date. The key challenges have been the high level of high-grade cytokine release syndrome, as seen with Kymriah in children, and a high level of high-grade neurotoxicity observed with just CAR T and other programs in adult patients with ALL. Our initial data for AUTO1, both in children and in adults, shows a lack of high-grade CRS by Lee criteria with no patients treated in ICU for high-grade CRS. Also the high level of high-grade neurotoxicity appears -- observed with other programs appears low and is at similar levels to blinatumomab. However, the activity level is very high with more than 80% of the evaluable patients achieving a molecular CR. In summary, we believe that the strong persistence of the CAR T cells over time, coupled with a low frequency of severe CRS events seen in these patients, represent encouraging initial data for AUTO1 and relapsed refractory adult ALL. Of note, we expect AUTO1 in adult ALL to move into a registration trial towards the end of this year. Moving on to AUTO3 in pediatric ALL and to Slide 9. In the quarter, we provide an update from the ongoing AMELIA Phase I/II study in pediatric ALL. These data demonstrated that 6 out of 6 patients treated at highest dose level of 3 million cells achieved -- or achieved minimal residual disease, negative complete responses. Ongoing MRD negative CR remissions were noted in 4 out of 6 patients with duration up to 10 months as of February 2019, the date of the latest follow-up. There have been no reported CD19 or CD22 negative relapses in CAR T-naive patients. Data also showed that AUTO3 continues to be generally well tolerated with no high-grade CRS, no ICU admissions and no pressers or critical care support for CRS required. The Phase II portion of this study is expected to start in the second half of 2019. We're also pleased to receive the recent news that the United States FDA has granted orphan drug designation to AUTO3 for the treatment of acute lymphoblastic leukemia. Moving on to our inaugural research and development day on March 26, 2019, which we hosted in New York and allowed us a unique opportunity to present an in-depth overview of our differentiated technology, multiple programs, market opportunities and the significant pipeline progress we have achieved to date. A major focus of the R&D Day was on how to address tumor heterogeneity using our modular approach to T cell programming, as illustrated on Slide 10. The key focus of the presentation was encountering immune modulation employed by the cancer cells, in particular checkpoint-based inhibition and TGF-beta-mediated dia-modulation of T cell activity. An example of modular programming is shown on Slide 11. We have planned to introduce these auxiliary programming modules into next-generation programs for AUTO2, AUTO3 and AUTO6. Going forward, as starting with AUTO7, in prostate cancer and other development programs, we will include 1 or more of these programming modules from the onset. We believe our ability to rapidly iterate programs enable us to drive a high pace of innovation, and in particular, in solid tumors, will allow us to penetrate the defense mechanisms. Finally, moving to Slide 12. Important to our ability to serve patients is product manufacturing and delivery. Our facility at the gene and cell therapy Catapult facility in Stevenage U.K. is critical for clinical trial supply. The facility and our suite are now operational and started manufacturing products for clinical studies in March 2019. In January 2019, we initiated a build-out of a commercial manufacturing facility in Enfield in the U.K. called the GRiD. This facility will provide global supply for viral vector as well as planned capacity for up to 1,000 T cell therapies annually. The GRiD is planned to serve as our initial commercial launch facility. Also in 2019, we signed a long-term, full building lease for a built-to-suit facility that will be the site of our first full commercial-scale manufacturing center with a plant capacity of up to 5,000 T cell therapies annually. This facility will also house our new U.S. headquarters and will be located in Rockville, Maryland, close to our current offices. The facility is expected to open in 2021. With that, I will turn the call over to Andrew for our first quarter 2019 financial update. Andrew?