Scott Cormack
Analyst · William Blair. Your line is open
Thanks, Jim. Good afternoon and thank you for joining us. Today I will provide an in depth update on our key programs, including results to-date and anticipated events. We have two clinical stage assets, Custirsen and Apatorsen being evaluated in two Phase 3 studies and five Phase 2 studies across a variety of cancers and we have strong financial resources to fund our ongoing operations. Over the next 12 months, we expect a number of significant clinical events for these product candidates, including survival results for our Phase 3 prostate cancer trial, a second interim futility analysis for our Phase 3 lung cancer trial, subject to completion of the Teva termination agreement and a modified statistical analysis plan, enrollment completion in our Phase 2 metastatic bladder cancer trial and survival results for our Phase 2 pancreatic cancer trial. We have developed a pipeline of late stage product candidates that target mechanisms of treatment resistance in cancer. These treatments are designed to block the production of specific proteins that we believe promote treatment resistance and survival tumor cells and are overproduced in response to a variety of cancer therapies. Our aim in targeting these particular proteins is to disable the tumor cells’ adaptive defenses, thereby rendering the tumor cells more susceptible to attack. We believe this approach will increase survival time and improve the quality of life for cancer patients. Let me start with an update on our lead product candidate Custirsen. In December 2014, OncoGenex and Teva agreed to negotiate the termination of our collaboration and return Custirsen rights to OncoGenex. Negotiations of the final termination agreement and mechanics for the transition of the program are still ongoing. While this process has taken longer than originally anticipated, we and Teva are continuing to work diligently to complete the transaction. Custirsen is currently being evaluated in two Phase 3 trials, one in patients with prostate cancer and one in patients with non-small cell lung cancer. We and collaborating investigators have conducted one Phase 3 clinical trial and five Phase 2 clinical trials to evaluate the ability of Custirsen to enhance the effects of therapy in prostate, non-small cell lung and breast cancers. Data from these trials demonstrate the potential benefit of adding Custirsen to existing cancer therapies. I’d like to take a moment to highlight important results from subsequent analysis conducted following the completion of the Phase 3 SYNERGY trial and provide an update on the two ongoing Phase 3 studies, AFFINITY and ENSPIRIT. Although the primary endpoint of overall survival for the SYNERGY trial was not met, we are enthusiastic about the results from an independent retrospective analysis that showed a meaningful survival benefit in them who received Custirsen and who were defined as having poor prognosis based on well established prostate cancer risk factors. Preliminary results showed the unadjusted hazard ratio for these patients and measuring used to compare the death rates between groups was 0.67 for the four prognostic subgroups, representing a 33% lower rate of death for patients who have the worst prognostic scores and received Custirsen. We are continuing to evaluate these findings and have submitted data to ASCO for presentation at its upcoming annual meeting. We will provide additional information regarding these data if and when they are accepted. We believe the hazard ratio and P-value for the overall SYNERGY trial would have been significant if this trial hadn’t rolled the higher number of patients with poor prognostic features. This analysis is important in consideration of the ongoing Phase 3 trials, AFFINITY and ENSPIRIT. In both of these trials patients enrolled must have experienced disease progression following initial treatments prior to receiving Custirsen. As clusterin is more heavily expressed in more aggressive tumors or is a reaction to treatment, Custirsen may provide a survival benefit for these patients given the SYNERGY clinical results. For AFFINITY as specifically this Phase 3 trial is evaluating a survival benefit for Custirsen in combination with the second-line chemotherapy cabazitaxel in patients with metastatic CRPC. We completed enrollment of approximately 630 patients in September 2014 and the trial is designed to show a survival benefit with 85% power based on a hazard ratio of 0.75. A single interim futility analysis was completed in January 2015 and the trial is continuing based on the recommendation of the independent data monitoring committee. Survival results in this trial are expected in late 2015 or early 2016. The Phase 3 ENSPIRIT trial is evaluating a survival benefit for Custirsen in combination with docetaxel treatment as second-line chemotherapy in patients with non-small cell lung cancer. Treatments that improve overall survival in advanced non-small cell lung cancer are urgently needed. The current design is to enroll 1,100 patients in order to show a survival benefit with 90% power based on a hazard ratio of 0.80. Two interim analyses exist for stopping the trial based on inadequate evidence of clinical benefit or futility. The first futility analysis was completed in August 2014. Upon completion of the Teva termination agreement we may modify the study design and statistical analysis plan for the ENSPIRIT in order to allow for a smaller trial size and to include an earlier, more rigorous second interim futility analyses. The goal of this amendment would be to provide a better assessment of more clinically relevant survival benefit when adding Custirsen to second-line docetaxel or to terminate the trial early for survival futility. We would aim to complete the more rigorous second interim futility analyses by mid-2015, subject to completion of these modifications. Based on the improved survival benefit observed in poor prognostic patients treated with Custirsen in the completed Phase 3 SYNERGY trial, we’re optimistic about the ongoing AFFINITY and ENSPIRIT trials because the greater proportion of patients with poor prognostic features are being enrolled in these second-line Phase 3 trials. In light of the encouraging SYNERGY results in this patient population, we may also prospectively evaluate those patients with poor prognostic factors within the ongoing Phase 3 AFFINITY and ENSPIRIT trials. I’d now like to provide an update on our proprietary candidate apatorsen and the ORCA program. Apatorsen is our product candidate designed to inhibit production of Heat shock protein 27, a cell survival protein expressed in many types of cancers including bladder, non-small cell lung, pancreatic, prostate and breast cancers. Hsp27 expression is stress-induced by many anti-cancer therapies. Over expression of Hsp27 is thought to be an important factor leading to the development of treatment resistance and tumor immune escape mechanisms, both of which are associated with metastasis and negative clinical outcomes in patients with various tumor types. Hsp27 can also function as an immunomodulatory protein by a number of mechanisms that include altering important membrane expressed proteins on monocytes and immature dendritic cells. This alteration results in tumor-associated immune cells that are not functional in identifying and killing cancer cells. The induction of anti-inflammatory cytokines by Hsp27 may also play a role in down-regulating lymphocyte activation leading to additional unresponsive immune cells. Given its role we believe this is a unique mechanism that could be synergistic with other therapies and as a result is generating considerable interest. We and collaborating investigators are currently conducting five randomized Phase 2 clinical trials that are being designed to evaluate the ability of apatorsen to enhance various treatments in patients with bladder, lung, pancreatic and prostate cancers. The primary endpoints of these Phase 2 trials are survival or progression free survival outcomes in order to identify patient populations and indications for future company sponsored trials. It’s worth noting that statistically significant differences in these trials are unlikely due to small sample sizes. However the trials are designed to potentially support registration if the primary endpoints reach statistical significance. Let me start with the study of apatorsen and its potential role across the continuum of bladder cancer treatment, including both superficial and metastatic bladder cancer. Bladder cancer is a disease where limited treatment advances have been made over the last two decades. This represents a high unmet need for new treatments that extend survival given the overwhelming number of patients who are diagnosed each year and progressed on current treatment. In December 2014, we announced results for our Phase 2 Borealis-1 trial of apatorsen in the treatment of metastatic bladder cancer. Subsequent analysis showed that the addition of 600 milligrams of apatorsen to standard of care chemotherapy resulted in a 50% reduction in the risk of death in patients with lower performance status. As I mentioned earlier, a similar result in patients with poor prognostic factors was observed in the Custirsen SYNERGY trial. These two trial’s results confirm our belief that these product candidates, both of which targets stress-induced proteins, maybe most effective in patients with poor prognostic features. Turning to superficial disease, we completed a Phase 1 trial of apatorsen in patients with superficial disease or muscle invasive bladder cancer who had not yet undergone vasectomy or transurethral resection. Results of this trial demonstrated that of the patients treated with apatorsen 38% had complete responses with no pathologic evidence of disease observed in polysurgical tissue following only four doses of apatorsen administered intravascularly over an eight day period. The Borealis-2 trial is currently evaluating apatorsen in combination with docetaxel treatment in patients with advanced or metastatic bladder cancer who have disease progression following first-line chemotherapy. We expect enrollment in this trial to complete in late 2015. Based on clinical results to-date, we are currently evaluating parallel development strategies for continued evaluation of apatorsen in both superficial and metastatic bladder cancer. Moving to pancreatic cancer, in December of last year, we announced completion of patient enrollment in the Phase 2 Rainier clinical trial evaluating apatorsen in combination with ABRAXANE and gemcitabine in patients with previously untreated metastatic pancreatic cancer. We expect to report survival results for this trial in late 2013 or early 2016. Turning to our evaluation of apatorsen in lung cancer, apatorsen is currently the subject of two ongoing Phase 2 trials, Spruce and Cedar. We’ve recently announced completion of patient enrollment in the Spruce clinical trial evaluating apatorsen in patients with previously untreated advanced non-small cell lung cancer. The trial will allow us to better understand the role of apatorsen’s potential to delay or prevent treatment resistance and improve survival outcomes. We expect to report primary results of the Phase 2 Spruce trial in the first half of 2015. In addition, the Cedar clinical trial is currently enrolling patients. Cedar is an investigator sponsored, randomized, open-labeled Phase 2 trial evaluating apatorsen in patients with previously untreated advanced schema cell lung cancer. That completes the development program update. At this time, I’ll turn the call over to John who will review our fourth quarter and year-end 2014 financial results. John?