John Scarlett
Analyst · Piper Jaffray. Your line is now open
Thanks, Olivia. Good afternoon, everyone, and thanks for joining. As this is our 2016 year-end call I'd like to take a moment to reflect on some of the important events occurred during the year. We believe the activities in 2016 provided a foundation on which further development of imetelstat can be evaluated. We remain very pleased with Janssen's continued steady engagement to broadly assess the potential development past very strong. First on the translational research site, Janssen has continued to sponsor and conduct numerous pre-clinical studies. In 2016 at the Annual Meetings of both the American Association for Cancer Research or AACR and the American Society of Hematology or ASH, there were several presentations that describe data from such ongoing work. These studies explored the activity of imetelstat and other hematologic myeloid malignancies such as acute myeloid leukemia both as a single agent and in combination with drugs currently used in clinical practice. Janssen have also sponsored academic research investigating the mechanisms to which telomerase in addition by imetelstat might inhibit the malignant progenitor cell clones in the bone marrow and exert the effects that have been observed in patients. All of these presentations can be found on our website. A new abstract from the Janssen translational research group was recently accepted for poster presentation at the upcoming 2017 AACR Annual Meeting which will occur in April. This abstract summarizes preclinical data on the effects of combining imetelstat with the Bcl-2 inhibitor venetoclax for which both in vitro and animal models of acute myeloid leukemia or AML. The AACR abstract is expected to be published online at AACR.org later today. While promising pre-clinical data have suggested the potential imetelstat and other hem myeloid malignancy such as AML, in the future there is still substantial work to be done before any new clinical studies can be designed. This is particularly the case of imetelstat would be using combination with another drug which we and Janssen currently believe will likely be necessary in AML. We do not expect any trials in AML to be initiated until more data are available from the ongoing clinical studies in part because such data may inform the designs of any future trials including imetelstat dosing. Beyond the translational research accomplishments of 2016, of course great effort has been focused on the ongoing IMbark and IMerge clinical trials in MF and MDS. Janssen's key 2016 execution objectives for imetelstat clinical development were to ensure adequate patient recruitment for IMbark and IMerge and to conduct internal data reviews of both trials to inform further development plans. A recent summarize the outcomes of the first data review is conducted in the third quarter of 2016 for both trials and then outline plans for the second data reviews occurring in 2017. First IMbark is the Phase 2 trial in intermediate-2 or high risk myelofibrosis patients who are refractory too or have relapsed after treatment with the JAK Inhibitor. This trial is originally designed to evaluate two different doses of imetelstat and to confirm the drugs activity using co-primary endpoint of spleen response and symptom response assessed to 24-weeks. These endpoints are the same ones that were developed from previous pivotal myelofibrosis studies in which JAK inhibitor was used to treat front line MF patients. The relapse to refractory patients being treated in IMbark have either never responded to a JAK inhibitor or the disease progressed during or after treatment with the JAK inhibitor. Treating non frontline myelofibrosis patient is clearly challenging. For example, recent data from Phase 3 trials of other JAK inhibitor compounds and previously JAK exposed patients have not been able to replicate the response rate absorbed in the original ruxolitinib Phase 3 trials in frontline MF patients. In addition long term follow up from clinical studies of the JAK inhibitor ruxolitinib, the only drug approved for MF today also suggest that approximately 75% of patients have discontinued treatment by five year with suboptimal response a loss of therapeutic factors a major reasons for discontinuation. The Janssen commercial team conducted an analysis of real world data presented at ASH last December. It reviewed treatment patterns and outcomes of MF patients from two U.S. medical claims data basis suggesting that once patient failed or discontinued ruxolitinib median overall survival is only 7 months. The relapse refractory patient population represents a significant unmet medical need and is clearly in need of new therapies. In the first internal data review of the IMbark completed in September of last year, Janssen reviewed data from 20 patients from each dosing model at a 12 week time point in order to make an early assessment of the appropriate imetelstat starting doses schedule. Based on that internal review Janssen determine the following. First, the safety profile was consistent with prior clinical studies in imetelstat and hem malignancies and no new safety signals were identified. Second, the starting dose of 4.7 milligrams per kilograms administered every three weeks did not show sufficient activity to warrant further investigation and was closed to further enrollment of the patients renaming in the treatment phase could continue to receive an imetelstat using 4.7 milligram per kilogram dose. Third, the higher starting dose of 9.4 milligrams per kilogram every three weeks showed encouraging trends in efficacy amongst the first 20 patients and warranted further investigation. However new patient enrollment to this was suspended because of an insufficient number of patients met the protocol designed interim efficacy criteria 12 weeks to confirm the dose for further development. While on the first data review Janssen amended the IMbark protocol to include allowing clinical investigators to increase the dose of their allegeable patients in the 4.7 milligram per kilogram on 9.4 milligrams per kilogram. This amendment then implemented in many clinical sites and Janssen has informed dissipate as of January of this year a number of patients have had the dose increased. So let's move on to IMerge. This study initiated in the first quarter of 2016 is a Phase 2, 3 trial evaluating imetelstat in patients with low or intermediate one risk myelodysplastic syndromes who are dependent on red blood cells transfusions and who relapsed after or are refractory to treatment within erythropoiesis stimulating agent or an ESA. Red blood cell transfusions which were required by many lower risk MDS patients can lead to elevated levels of ion and blood and other tissues which the body has no normal way to eliminate and is associated with core overall survival and higher risk of developing AML. The primary endpoint of IMerge is the weight or percentage of patients who achieved red blood cell transfusion independence for at least a consecutive eight weeks period during the trial. The rate of 24 week red blood cell transfusion independence is a key secondary endpoint because it durable responsive of treatment is an important outcome measure in this patient population. As you will recall, IMerge has two parts, part 1 is a Phase 2 open label single arm design of evaluating 7.5 milligrams per kilogram of the imetelstat administered every four weeks in up to 30 patients. This part of the trial has been fully enrolled. Part 2 of the study is designed as a Phase 2 randomized placebo control trial of up to 170 patients. In September 2016, Janssen completed an internal review of data from the subset of patients from Part 1 of IMerge. Based on that review Janssen determined that emerging safety and efficacy data appear to be consistent with the data reported from the MDS patients in the Mayo Clinic pilot study and decided to continue part 1 of IMerge unmodified. Since the first internal data reviews last September, treatment of patients remaining on study in IMbark and IMerge have been ongoing to obtain additional and more mature data from both trials. Janssen has already initiated the process for the second internal data reviews for these trials which will include comprehensive analysis encompassing safety, efficacy, pharmacokinetic and pharmacodynamic data, as well as other exploratory assessments such as cytogenetic and molecular data. For IMbark the second internal review is expected to include data from patients who are enrolled in the 9.4 milligram per kilogram starting dose arm and have been followed for at least 24 weeks consistent with the protocol specified co-primary endpoint and efficacy endpoints. Following the second internal data review, we expect Janssen could decide to do first, resume enrollment in a 9.4 milligram per kilogram dosing to reach total of approximately 100 patients, we started on 9.4 milligram per kilogram for the protocol specified primary analysis of spleen and symptoms response rate to 24 weeks. Second, they could decide to modify for example to add a new dosing arms or incorporate other modifications to the trial design or of course they could decide to close them. For IMerge the second internal data review is expected to recruit data from all of the patients enrolled in part 1 in order to assess the benefit risk profile of imetelstat including the durability response. We believe this assessment will inform Janssen's decision whether to move forward to part 2 of IMerge. If Janssen does decide to move forward with Part 2, we expect the Phase 3 stage of the IMerge to be opened for patient enrollment in approximately mid-2017. We also expect Janssen to select data from Part 1 of IMerge to be considered for presentation at a medical conference in the future. We believe the outcomes from the second internal data reviews, regulatory considerations and the totality of other program information including the evolving treatment landscapes in MF and MDS will inform Janssen's decision regarding future development plans for imetelstat. Following the second internal data reviews, Janssen could decide to resume, modify or terminate IMbark, IMerge, the imetelstat program for the collaboration agreement. And we expect their decision making to occur in the second quarter of 2017. We also note that Janssen's decisions regarding any future development plans for imetelstat maybe subject to subsequent regulatory feedback. Before we open the call to questions, I will also note that our search and evaluation process to identify and evaluate oncology products, programs or companies for potential acquisition continues but we have not yet found such candidate. Thanks for listening. I will be pleased to answer questions in the time we have remaining. With that operator, let's open the call for questions.