Edwin Rock
Analyst · Capital One Securities. Your line is open
Thanks, Harout, and thank you to all on the line for joining us today. As a reminder, in June 2023, the FDA cleared addition of an optional time-based primary analysis to our Phase III randomized trial of uproleselan in relapsed and refractory AML. This trial enrolled 388 patients and has a primary endpoint of overall survival. Survival events have continued to slow over time, so we will proceed with a time based analysis after a data cutoff at the end of this month. We look forward to reporting top line results in Q2. As Harout mentioned, median follow-up for patients remaining on study will be over three years at time of analysis, remarkable in a trial of therapy for relapsed and refractory AML. Also, a majority of surviving study patients received hematopoietic cell transplantation. And at data cutoff, a large majority of these patients will be at least two years post-transplant. That's a notable milestone, because after two years post-transplant, disease relapse becomes infrequent. Thus, these Phase III clinical trial data are clinically mature and support performance of time-based primary analysis next quarter. Our trial is testing two hypotheses. First, adjunctive uproleselan leads to deeper, more durable measurable residual disease negative responses to therapy. And second, these deeper responses and reduced gastrointestinal toxicity enable more patients to get to and through potentially curative hematopoietic cell transplantation. Rather than target a specific gene mutation, uproleselan is designed to be agnostic to cytogenetics, gene mutation profile and backbone therapy. Consistent with its molecular structure that mimics a natural complex carbohydrate, uproleselan demonstrates an unremarkable toxicity profile in trials conducted to date. So we see potential for broad uproleselan utility in combination with diverse other AML treatments across lines of therapy. Correspondingly, uproleselan potential outside of relapsed and refractory AML is under study in multiple ongoing investigator initiated trials across AML subtypes and lines of therapy. The largest of these trials is an adaptive NCI sponsored Phase II/III trial conducted by the Alliance for Clinical Trials in Oncology. This NCI alliance study is testing uproleselan in newly diagnosed older patients with AML, who are fit for intensive chemotherapy. The Phase II portion has a primary endpoint of event free survival, or EFS, and completed enrollment of 267 patients in December 2021. Just this month, NCI confirmed that the Phase II EFS event trigger has not yet been reached. This trial was designed to show median EFS prolongation from seven to 11 months, hence was expected to reach a Phase II event trigger in 2022. We look forward to sharing trial results when available. As part of our collaboration, the NCI also supports an ongoing Children's Oncology Group Phase I study conducted by COGS Pediatric Early Phase Clinical Trial Network. This dose escalation trial, which is part of the initial pediatric study plan agreed on with the FDA and EMA, assesses safety, pharmacokinetics and preliminary clinical activity of uproleselan plus chemotherapy in pediatric patients with relapsed or refractory AML. Enrollment in this study is ongoing after first patient-in occurred last October. Additional ongoing investigator initiated trials continue to evaluate uproleselan combinations in AML. These trials include uproleselan combinations with a conditioning regimen in patients up to 39 years old undergoing transplantation as well as with Azacitidine and Venetoclax in elderly patients with frontline AML. In addition, a uproleselan combination with low dose cytarabine and cladribine in patients with treated and secondary AML was recently updated at the 2023 ASH meeting. In this notoriously difficult-to-treat population, all of whom had adverse cytogenetics and were previously treated with a hypomethylating agent, cladribine, cytarabine and uproleselan led to marrow blast reductions in 72% of 18 evaluable patients. The authors concluded that this combination provides a safe approach to marrow blast reduction and disease control in preparation for potential hematopoietic cell transplantation. In summary, we believe uproleselan has broad potential utility across AML by targeting a novel form of chemo resistance from AML cell binding in bone marrow. Uproleselan's favorable safety profile makes it a good candidate for combinations with other AML therapies. Finally, both of the two large ongoing randomized trials have seen slow event accumulation and that fact highlights potential for uproleselan to become a valuable addition to diverse existing AML therapies. Beyond uproleselan, we recently completed our Phase Ia single ascending dose trial of subcutaneous GMI-1687. We will evaluate this second-generation E-selectin antagonist as an outpatient, self-administered subcutaneous therapy to potentially alleviate sickle cell vaso-occlusive events at time of pain onset. In addition to benefit from pain control, such a point of care therapy may also reduce patient emergency room visits and hospitalizations. Phase Ia first-in-human data in healthy volunteers support safety and fixed dose administration of subcutaneous GMI-1687. Full study results will be presented at an upcoming medical meeting. Also, we're pleased to announce that we've initiated a collaboration with the sickle cell disease clinical trials network of the American Society of Hematology Research Collaborative. Through this relationship, GlycoMimetics will obtain feedback from experts and people living with sickle cell disease on our GMI-1687 clinical development plan. The ASH research collaborative fosters partnerships to expedite therapeutics development, generate high quality evidence for clinical decision making and improved outcomes for people living with sickle cell disease. We look forward to our partnership with them. Now I'll turn it over to Bruce to discuss the potential commercial opportunity pending positive results of our Phase III trial.