Matthew Henn
Analyst · John Newman of Canaccord
Thank you, Lisa and good morning. I'll begin with SER-155. SER-155 is an orally dose rationally designed, cultivated microbiome therapeutic candidate designed to decrease the instance of gastrointestinal infections, bacteremia, and graft versus host disease in immunocompromised patients, receiving allogeneic stem cell transplantation. SER-155 is designed to prevent both bacterial bloodstream infections, particularly those that harbor antibiotic resistant genes, as well as to modulate post immunity to reduce the onset of graft versus host disease. Prior published studies by our collaborators at Memorial Sloan Kettering Cancer Center, indicate that HSCT patients with a disrupted low diversity microbiome are at substantially increased risk for bacterial infection including antibiotic-resistant infection and poor clinical outcomes. At the recent ID Week Conference, in an oral presentation, we highlighted preclinical data showing that SER-155 can decolonize patient isolated antibiotic-resistant pathogen including vancomycin -resistant enterococci and carbapenem -resistant Enterobacteriaceae, such as Enterococcus faecium and Klebsiella pneumonia, which are notable escape pathogens. The continued emergence of antibiotic resistant bacterial infection is a top global health priority identified as such by both the World Health Organization and centers for disease control with significant clinical implications, particularly in immuno -compromised patients. Prior studies published by our collaborators at MSK indicate that HSCT patients with the disruptive low diversity microbiome on a substantially increased risk of bacterial infections, including antibiotic resistant, resistant infections and poor clinical outcomes. Based on these observations, in our clinical programs and our preclinical data supporting SER -155 mechanisms of action. We believe SER-155 has the potential to reduce the risk of infection in individuals with compromised immune systems. IND for SER-155 was cleared by the FDA and we are in the late stages of prepping the dose our first patient in the SER-155 Phase 1b study in collaboration with MSK and the University of Chicago. The Phase 1b study is a two-part trial, including an open-label and placebo-controlled portion. And the overall study is designed to enroll approximately 70 participants. A first part of the study aims to primarily assess safety in SER-155 engraftment and the second part of the study will also evaluate the incidence of bloodstream infections, gastrointestinal infections, and the incidents of acute graft versus host disease. We look forward to providing further updates soon on the progress of this important study. Now, moving onto our ulcerative colitis efforts. We continue to analyze data from our SER-287 Phase 2b study conducted in patients with mild-to-moderate [Indiscernible] colitis. We're in the process of obtaining and analyzing microbiome results, as well as Metabolomic and other functional data from that study. We expect these data to provide us with a much deeper understanding of that study's unexpected clinical outcome. And these results will form our decisions regarding next steps for 287 as well as any potential modifications to our ongoing 001 Phase 1B study. We intend to communicate and update on our initial assessment findings before the end of the year. As a reminder, SER-301 is a next-generation orally dosed, rationally designed, cultivated microbiome therapeutic candidate for the treatment of ulcerative colitis. The composition of SER-301 is Designed to optimize drug species in graftment and the pharmacological properties that are clinical and non-clinical research have identified as potentially important drivers of a treatment effect. Research indicates that individuals with Ulster colitis can have a gastrointestinal microbiome that differs from those of healthy individuals. And further, that bacteria found in the gastrointestinal microbiome and the metabolites they produce are associated with modulation of many of the immune pathways that have been associated with Ulster colitis and IBD more broadly. Unlike SER-287, a donor-derived product candidate, SER-301 is comprised of a target set of bacteria selected to optimize the reduction of pro-inflammatory activity, improve epithelial barrier integrity, and modulating multiple use relevant and mean pathways to suppress inflammation. We continue to enroll our SER-301 Phase 1b study in adults with mild-to-moderate ulcerative colitis. As we had previously done several years ago with our SER-109 program, we're performing an in-depth, rigorous, scientific analysis of all available, colitis study results. Based on the findings from our SER-287 assessment, We intend to make a thoughtful determination regarding next steps for U.C. franchise, and we maintain the opportunity to modify the SER-301 study, if awarded. With that, I will now turn the call to David, to provide an overview of our financials.