Ali Fattaey
Analyst · Cowen and Company
Thank you, Mani. Focusing on our proprietary pipeline, I would like to start with CUDC-907, our orally available small molecule drug candidate that is designed to inhibit select classes of HDAC enzymes and PI3 kinase isoforms of alpha, delta and beta. CUDC-907 is being tested in an ongoing Phase I dose escalation trial in patients with relapsed or refractory lymphoma or multiple myeloma. In December of last year, we presented interim data at the ASH Conference on 13 safety evaluable patients, of which 11 were evaluable for response assessment. 10 of these patients received continuous daily doses of CUDC-907, and 3 patients received dosing twice weekly. We reported a possible signal of antitumor activity in this presentation, including one patient who had a partial response, and that was a patient with mixed follicular lymphoma/diffuse large B-cell lymphoma that was treated with the daily administration schedule. 7 other response evaluable patients achieved stable disease, and among the patients with stable disease, one patient with multiple myeloma was then in Cycle 13 of their daily CUDC-907 treatment. Both of these patients currently continue their treatment on this study. At the ASH Conference, we also reported that based on the potential for drug accumulation and the frequency of Grade 3 or 4 adverse events of thrombocytopenia, diarrhea or neutropenia with the daily administration schedule, this regimen had been determined to have reached the maximum tolerated dose. Since the ASH presentation, intermittent dosing of CUDC-907 using twice or 3x per week administration schedules continue to enroll patients in escalating dose cohorts at all 3 study sites. We anticipate that the dose escalation portion of this study will be completed midyear. We expect to initiate enrollment in the expansion phase of the study during the second half of this year, where we plan to test CUDC-907 in patients with select hematologic malignancies, potentially in patients with diffuse large B-cell lymphoma and multiple myeloma. In addition to the ongoing dose escalation trial in hematologic indications, we are also exploring treatment of patients with select solid cancer in a Phase I study. We expect to provide additional details regarding this trial as we get closer to the time of its initiation. I should point out that we are developing CUDC-907 in collaboration with the Leukemia & Lymphoma Society, or the LLS, and we'd like to thank LLS for their important guidance and support in the development of this drug candidate, CUDC-907, as we continue to advance it in the clinic. I would now provide an update of CUDC-427, our oral small molecule Smac mimetic drug that is designed to promote cancer cell death by antagonizing IAP proteins. I'll remind you that we licensed the exclusive worldwide rights for CUDC-427 from Genentech in November 2012. We initiated a Phase I trial of CUDC-427 monotherapy last year to expand on the findings from the Genentech Phase I trial that was conducted in 42 patients with refractory solid tumors or lymphomas, the results of which were presented during an oral session at ASCO last year. The intent of our sponsored Phase I CUDC-427 trial was to further refine the safety, tolerability and maximum tolerated dose of single agent CUDC-427 using a more intensive dosing schedule than that, that was used by Genentech in their Phase I trial, and also to refine the potential clinical benefit in select patient populations, including ovarian and fallopian tube cancer patients. During the course of treatment on our study, one patient with Stage 4 breast cancer experienced Grade 3 elevation in ASP and ALT liver transaminase enzyme levels. Unlike prior clinical experience with CUDC-427, this patient's transaminase and, later, her bilirubin level continued to rise despite discontinuation of CUDC-427 treatment, and the patient died of liver failure 1 month later. In response to our reporting of this event, we received written notification from the FDA on November 5 last year that the trial had been placed on a partial clinical hold and that no new patients may be involved in the study until the partial clinical hold is lifted by the FDA based on our response to the request for additional information. We compiled the FDA-requested information regarding the patient's case, as well as a thorough analysis of safety for all 51 patients treated with CUDC-427. This information, along with an amended protocol designed to mitigate risk of liver injury for patients, has been submitted as part of our response to the FDA. We will work closely with the agency to resolve the partial clinical hold in order to reinitiate enrollment and treatment of patients with CUDC-427. Our plan is to continue treatment of patients with single agent CUDC-427 using this modified protocol that was submitted to the FDA. Provided that the partial clinical hold is lifted, we also expect to initiate a separate study treating HER-2 negative advanced breast cancer patients with CUDC-427 in combination with capecitabine or Xeloda. This proposed study will have a Phase Ib/II design, and we expect to provide additional details closer to the study start date. Examination of CUDC-427 in other indications and combinations is also planned. I will now turn to Dan to briefly discuss our 2 partner programs, Erivedge and Debio 0932. Dan?