Scott Daniel Cormack
Analyst · William Blair
Thank you, Susan. Good afternoon, and thank you for joining us. I'd like to begin today's call with an update on our clinical development progress for custirsen in both non-small cell lung cancer and castrate-resistant prostrate cancer, or CRPC. We recently issued a press release announcing the updated development plans for custirsen in non-small cell lung cancer. The Phase III trial, known as the ENSPIRIT trial will be an international, randomized open-label study evaluating the potential survival benefit of combining custirsen with docetaxel in patients with advanced or metastatic non-small cell lung cancer, who have progressed after first-line chemotherapy has failed. The study aims to enroll approximately 1,100 patients and has been designed based on an expected median survival for patients in the control arm to be 9 months and to detect a hazard ratio of 0.8 with 90% power. 2 interim analyses will be performed. The first analysis is planned to assess whether to stop the trial early based on both inadequate evidence of clinical benefit and futility. We will be evaluating both progression-free survival and overall survival during this interim analysis. If both endpoints meet the predefined criteria for showing an inadequate progression-free survival clinical benefit and overall survival futility, the trial will be stopped. The second analysis is based on survival alone and will be performed later in the trial. The trial will not be stopped early to claim efficacy. As you may recall, Phase III data from a single-arm study evaluating custirsen in combination with gemcitabine platinum-based regimen in first-line non-small cell lung cancer, were published earlier this year. The data demonstrated the median overall survival of 14.1 months and an acceptable safety profile. Additionally, decreased serum clusterin levels in 95% of patients evaluated were observed with lower serum clusterin levels during study treatment, correlating to longer survival outcomes. While these data are promising data for custirsen in combination with the gemcitabine-platinum regimen, treatments in the first-line non-small cell lung cancer landscape has rapidly changed to predominantly other agents such as trimetrexate. While pre-clinical data indicate activity for custirsen with trimetrexate, numerous studies in prostate and breast cancer have demonstrated an excellent safety profile and clear synergy for combining custirsen with docetaxel. Docetaxel is globally recognized as a standard of care in second-line treatment for both squamous and non-squamous non-small cell lung cancer, and the second-line market represents a considerable unmet patient need. This study will be conducted internationally by Teva and enrollment is planned to begin later this year. We look forward to providing further details when the trial is initiated. Regarding the clinical development program for custirsen and CRPC, we continue to be very positive about the progress of SYNERGY. As you may recall, SYNERGY is the primary registration Phase-III study for custirsen in combination with docetaxel and is evaluating a survival benefit for patients in the first-line chemotherapy setting. This study aims to enroll approximately 1,000 patients and accrual is expected to be completed by the end of this year. Finally, in the coming weeks, we expect to begin patient enrollment to the AFFINITY trial, our Phase-III clinical study, evaluating an overall survival benefit of custirsen when combined with Jevtana as second-line chemotherapy for patients with CRPC. This study aims to enroll approximately 630 patients throughout North America, Europe, Russia and Australia. The Phase-III study is based on an estimated median survival for patients in the control arm of 14 months and to detect the hazard ratio of 0.75 with 85% power or an approximate 25% increase in survival time. The critical hazard ratio has been calculated to be approximately 0.83. The AFFINITY study will evaluate the benefit of custirsen in combination with Jevtana, which is relevant whether Jevtana remains as second-line chemotherapy for CRPC or is repositioned as first-line chemotherapy based on future results of ongoing studies. I'd now like to focus on our other clinical stage product candidate, OGX-427, which is a proprietary asset. As you may recall, OGX-427 is designed to reduce levels of Heat Shock Protein 27, or Hsp27. Overexpression of Hsp27 correlates to increased stage and grade in many types of cancer. It is also believed to be an important factor leading to the development of treatment resistance and is associated with negative clinical outcomes in various cancers. Pre-clinical studies indicate that the innovation of Hsp27 increases tumor cell death rates and delays tumor growth. Preliminary data from an investigator-sponsored Phase-II clinical trial of OGX-427 in chemotherapy-naive patients with metastatic CRPC were presented at the American Society of Clinical Oncology Annual Meeting in June 2012. The results showed a higher number of patients without disease progression at 12 weeks and greater declines in prostate-specific antigen and circulating tumor cells with OGX-427 plus prednisone treatment compared to prednisone alone. This study has recently completed enrollment at 74 patients. We look forward to providing updated results from this trial as they become available. As previously announced, an investigator-sponsored randomized Phase-II study evaluating OGX-427 in combination with Zytiga in patients with CRPC is expected to initiate in the second half of 2012. In addition to our development activities in prostate cancer, we continue to enroll patients through our randomized Phase-II clinical trial of OGX-427 in patients with metastatic bladder cancers. This trial aims to enroll approximately 180 patients throughout North America and Europe, and will evaluate the overall survival benefit of OGX-427 in combination with gemcitabine and cisplatin. Additional Phase-II investigator-sponsored studies evaluating OGX-427 in other malignancies are under development. Further details of these studies will be provided when the trials are initiated. Results of these studies may direct future company-sponsored trials in indications that show promising clinical benefits. In conclusion, we're pleased with our progress in the first 6 months of 2012, and we look forward to an exciting year ahead. We are eagerly anticipating completion of enrollment in SYNERGY, initiation of 2 new Phase-III trials for custirsen and continued data presentations and trial initiations for OGX-427. At this time, I'll turn the call over to Michelle who will provide an overview of the second quarter financial results. Michelle?