Dr. Faye Feller
Thank you, Chip, and good morning to everyone on the call. First, as Chip mentioned, we expect to submit the new drug application in lower risk MDS to the FDA next month. I'm deeply impressed by and appreciative of the tremendous teamwork of the preclinical, regulatory, clinical and CMC teams to prepare the NDA. Next, we are very pleased that all of our submitted abstracts have been accepted at the upcoming ASCO and EHA annual meeting. The abstract for IMerge Phase 3 top line results was accepted for oral presentation at ASCO on June 2nd, and will be available on the ASCO website on May 25. The abstract for EHA described longer follow-up data on durability of transfusion independence, further evidence of potential disease modification and favorable patient reported outcomes in imetelstat-treated low-risk MDS patients and IMerge Phase 3. The abstracts are posted online this morning on the EHA website, and I will be covering their contents in my remarks. The first abstract, which was accepted for oral presentation at EHA, described not only the top line results from IMerge Phase 3 that were released in January of this year, but also new data, including an update to the rate of one-year transfusion independence. Specifically, with three months of additional follow-up, 21 of the 118 imetelstat-treated patients versus 1 of 60 placebo-treated patients achieved one-year TI, representing 63.6% of 24-week TI imetelstat responders. As stated in the abstract, the continuous TI for one year and longer represents substantial relief from transfusion-associated complications for this lower risk MDS patient population. In addition, this abstract describes new data on the correlations of reductions in variant allele frequency, or VAF, to longer TI duration in imetelstat-treated patients. I'll discuss these data with the next abstract. The second abstract also was accepted for an oral presentation at EHA and provides further evidence of the disease-modifying activity observed in IMerge Phase 3 with imetelstat. Of the 178 patients enrolled in IMerge Phase 3, 22% of imetelstat-treated patients and 21.7% of placebo-treated patients had baseline cytogenetic abnormalities, a cytogenetic response, which is defined by either a reduction or complete disappearance of abnormal cytogenetic clone characteristic for MDS was observed in 34.6% of imetelstat-treated patients versus 15.4% of placebo-treated patients. Imetelstat-treated patients achieving 8-week TI, 24-week TI and 1-year TI had VAF reductions of at least 50% that were statistically significantly greater compared to placebo for SF3B1, TET2 and DNMT3A mutations. Importantly, greater VAF reductions in SF3B1 mutation for imetelstat-treated patients were correlated at a highly statistically significant level with increases in hemoglobin and longer TI duration. The abstract concludes that these data taken together with the robust rates of TI that are continuously durable for imetelstat-tread patients may indicate improvement of the ineffective erythropoiesis characteristic of lower risk MDS and suggest imetelstat may alter the underlying biology of disease in these patients. Moving along to the third abstract, which will be a poster presentation at EHA. Patients with lower MDS and anemia typically experience severe fatigue that negatively impacts overall functioning in daily life. Further, fatigue can also be commonly reported as a side effect of currently available treatments. In IMerge Phase 3, an exploratory analysis of patient reported fatigue was conducted using the FACIT fatigue score, a validated 13 item patient questionnaire, to measure the rate of deterioration or improvement of fatigue during treatment with imetelstat or placebo. Based on this analysis, imetelstat did not worsen the rate of deterioration in fatigue. And impressively, patients treated with imetelstat had greater clinically meaningful, sustained improvement in fatigue compared to placebo. An improvement in patient-reported fatigue has not been previously reported with any other treatment for lower risk MDS. Also, the median time to achievement of sustained meaningful improvement in fatigue was shorter for imetelstat versus placebo. Finally, in imetelstat-treated patients, a significantly higher proportion of responders had sustained meaningful improvement in fatigue scores versus non-responders, consistent across 8- and 24-week TI and HI-E. This association was not observed in placebo-treated patients. These data provide additional evidence for the multifactorial clinical benefit of imetelstat treatment. Lastly, two imetelstat abstracts submitted by Geron collaborators have been accepted for presentation at EHA. The first, which will be presented in an oral presentation, covers the translational analysis from a subset of lower risk MDS patients from IMerge Phase 2. The abstract concludes that low inflammatory features at baseline and an induction o an adaptive immune profile by imetelstat are associated with TI response, suggesting that immune cell remodeling could contribute to hematopoietic activity of imetelstat treatment. The second, which will be a poster presentation, features imetelstat preclinical data in MS in which the authors demonstrate that imetelstat reduces hTERT expression and telomere length and targets JAK/STAT signaling, particularly in CALR-mutated cells. According to the abstract conclusion, the data proposed that CALR-mutated clones are highly vulnerable to imetelstat treatment. Next, I will discuss our pivotal Phase 3 IMpactMF study, which is designed to enroll approximately 320 patients with myelofibrosis that is relapsed/refractory to JAK inhibitor. Our Geron clinical operations team has been conducting on-site visits to clinical trial sites around the globe, and we consistently hear significant enthusiasm from investigators around IMpactMF, specifically as the first and only Phase 3 MF trial with overall survival as the primary endpoint. Additionally, we've been increasing our engagement with patient advocacy groups in the myelofibrosis space, who have also expressed excitement around the potential to extend survival in this JAK inhibitor relapsed/refractory population. Lastly, the IMerge Phase 3 readout in lower risk MDS has also spurred an additional way of support about the potential of imetelstat in myelofibrosis. Under our current planning assumptions, we continue to project the interim analysis for IMpactMF to occur in 2024. Of course, because these analyses are event-driven and it is uncertain whether actual rates for enrollment and events will reflect current planning assumptions, the interim analysis may occur at a different time than currently expected. In addition to engaging in a strong scientific exchange related to imetelstat at ASCO and EHA, our teams are planning to have significant on-site presence to interact directly with the medical community. We have exhibit space at ASCO, offering MDS disease state information and medical resources, for our clinical trials to oncologists and other attendees. Our medical affairs team is also participating in conferences, such as those organized by the Oncology Nursing Society, Society of Hematologic Oncology, Association of Managed Care Pharmacy, and the American Society of Hematology, to support and connect with a broad array of professionals who touch the lives of patients with lower risk MDS and myelofibrosis. I am very pleased that we have completed the initial hiring of the medical affairs field team, which includes senior field medical liaisons and oncology clinical educators. Experienced scientists and dedicated clinicians will be interacting with the medical community as ambassadors to champion the unmet needs of patients with lower risk MDS and MF. Their efforts are an important piece of our broad launch preparedness planning, which Anil will cover in his remarks as well as providing an overview of the imetelstat market opportunity. Anil?