John Scarlett
Analyst · Stifel
Thanks, Olivia. Good afternoon, everyone, and thank you for joining. I'll begin the call today with comments on the two large global imetelstat studies, IMerge and IMbark that are being conducted by Janssen. First IMbark. This is phase 2 clinical trial and approximately 200 patients with intermediate-2 and high risk mylofibrosis or MF, who are relapsed after or refractory due to treatment with the JAK inhibitor. These patients represent a significant unmet medical need. There are no approved alternative therapies beyond the one JAK inhibitor on the market today, which is ruxolitinib. And once the patient is relapsed after treatment median survival has been reported to be approximately 6 months. In IMBark, MF patients are initially assigned randomly to one of two dosing arms of imetelstat, either 9.4 milligrams per kilogram, or 4.7 milligrams per kilogram administered every three weeks. As I have discussed in the past one of the objectives of the study is to identify the appropriate dosing schedule in this relapsed or refractory MF patient population. To help inform this assessment, we expect Janssen to conduct periodic internal reviews of safety and efficacy from the two dosing arms. No review has been conducted to date. We expect the first internal review will include data from 20 patients from each of the two dosing arms, who've been followed on the study for at least 12 weeks. Janssen has reported to us that the patient enrollment to conduct this review has been achieved, so we expect this internal data review to be conducted by the end of the third quarter. As a reminder, the co-primary efficacy endpoints in this study are spleen response and symptom response rate assessed at the 24 week visit. Given the first internal data reviews occurring after 40 patients have been treated for only 12 weeks, we expect Janssen to conduct another internal data review to include longer follow-up with patients on the study of at least 24 weeks, consistent with these co-primary endpoints. We expect Janssen to conduct this additional review of safety and efficacy by the end of this year. There are no plans by either us or Janssen to publicly disclose the results of these internal data reviews except for any significant change to the study. During these internal data reviews, we expect patient enrollment for IMbark will continue. There are no predetermined study stopping rules in the protocol based on the results of these internal data reviews. Provided the data are sufficiently informative to enable decision-making, potential outcomes from any internal data reviews may include the following. If both doses show adequate activity and acceptable safety, we expect Janssen to continue with enrollment in both arms. If one of the doses does not show adequate activity or have acceptable safety, we expect that Janssen may stop enrollment in that arm. In the event that both arms do not have adequate activity or acceptable safety, we expect Janssen may select an alternative dose based on exposure response, efficacy or safety analyses or the study may be discontinued. Next, IMerge. This study is a Phase 2/3 clinical trial of approximately 200 patients with low and intermediate-1 risk myelodysplastic syndromes, or MDS, who have relapsed after or a refractory to treatment within erythropoiesis-stimulating agent or ESA. Chronic anemia remains the predominant clinical problem in low-risk and lower-risk MDS. ESA treatment can provide an improvement in anemia, but the effect is transient and patients may become dependent on frequent red blood cell transfusions, which is associated with poor survival. IMerge is planned to be conducted by Janssen in 2 parts. Part one is an open-label Phase 2 single-arm design to assess the efficacy and safety of imetelstat in up to 30 MDS patients before proceeding to part 2 of the study, which would be a Phase 3 randomized placebo-controlled trial. We have been informed by Janssen that the open-label Part 1 of the study is fully enrolled. A decision to move forward with to part 2 of the study will be based on a positive assessment of the benefit risk profile of imetelstat in this patient population, including red blood cell transfusion independent during any consecutive 8 weeks or longer since entering into the trial, consistent with the primary endpoint for the study. To inform this assessment, we expect Janssen to conduct an internal ongoing review of efficacy and safety from part 1 during the second half of 2016. No review has been conducted to date. During the review, no new patients will be enrolled into the study. If Janssen decides to move forward with part 2 of IMerge, depending on rate [ph] factors, including the timing of the completion of Janssen's internal data reviews and assessment, we expect part 2 of the clinical trial will be open for patient enrollment in the first half of 2017. As with IMbark, we do not expect data from any internal data reviews from IMerge to be presented or publicly disclosed by Janssen or us except for any significant change to the study design. If part 2 of the study is initiated by Janssen, we expect to disclose such an event upon the dosing of the first patient. Before I close my prepared remarks, I'd like to discuss other company activities. As many of you are aware tomorrow is the deadline for submitting abstract to be considered by the review committee of the American Society of Hematology, or ASH for presentation at the annual meeting to be held in December. I want to note the Janssen and Geron have no plans to submit abstracts related to imetelstat clinical data to ASH this year. We are still in the execution phase of the ongoing IMbark and IMerge studies, and data from those studies are not yet available. While waiting for clinical data to approve, Janssen has sponsored numerous preclinical studies to explore the effects of imetelstat in other myeloid hematologic malignancies, such as AML. Thus, we expect one or more preclinical abstracts to be submitted to ASH. However, until such abstracts are accepted and published, we're limited by the embargo policies of ASH in commenting further. We have indicated since announcing our collaboration with Janssen that we've been conducting a rigorous and comprehensive process to identify and evaluate the potential acquisition of new oncology products, programs or companies that we believe could potentially grow and diversify our business as well as to leverage the potential cash stream that could come from the successful development and commercialization of imetelstat. An ideal acquisition candidate would be a company that would possess either a platform technology or capability with outstanding science behind it, which could be used to develop a pipeline of preclinical or early clinical stage products that we believe can improve shareholder value on a risk-adjusted basis. This search and evaluation process continues, and we are uncertain whether we will be able to identify and make such an acquisition. Thanks to all of you for listening. I'd be pleased to answer questions in the time we have remaining. With that, operator, let's open the call to questions, please.