Ali Fattaey
Analyst · Robert Baird. Your line is now open
Thank you, Jim, and good morning, everyone, and thank you for joining us today. I would like to start by indicating that we continue with pressing forward with developing our pipeline of oncology drug candidates here at Curis. As you recall, our pipeline currently includes four drug candidates, two of which are in clinical development, including CUDC-907 and CA-170. And two of our drug candidates are in the pre-IND stage, which includes CA-4948 and CA-327. I will provide an update on these programs during this morning's call. And I would like to begin with CA-170, the first orally administered small molecule checkpoint antagonist that we are developing in collaboration with our partner, Aurigene, who are responsible for the discovery of the molecule. CA-170 targets the PD ligands and the VISTA inhibitory immune checkpoints. As a reminder, for our Phase 1 trial patient dosing of CA-170 began approximately a year ago. And we continue to enroll patients in the U.S., in South Korea, in Spain and other European countries also expected to join the trial shortly. And these are all as part of the dose escalation stage of the study, using a continuous once daily dosing schedule. As noted before and in general, we have focused on enrollment of patients that are immunotherapy treatment naïve and with cancers that either have or not yet received approval for treatments with anti-PD1 or anti-PDL1 checkpoint inhibitor antibody therapies in the U.S. Our expectation is to analyze the initial Phase 1 clinical profile of CA-170, based on data from approximately 30 to 40 such patients with respect to pharmacokinetics, pharmacodynamics, safety of the molecule and any clinical activity. In this regard, our submission for our presentation at the ESMO Conference this year, which will be in Spain during September, has been accepted for a poster and poster discussion. And we anticipate presenting these initial Phase 1 trial results at the conference. We also expect to have the opportunity to present at other scientific conferences upcoming during the year such as the SITC Conference in November. I would now like to provide an update on CUDC-907, which is being investigated as a monotherapy agent for treatment of patients with relapsed/refractory MYC-altered diffuse large B-cell lymphoma or DLBCL in a Phase 2 trial. As we noted before, multiple studies have shown that approximately a third of patients with DLBCL have MYC alterations which is associated with a significantly poor prognosis. As a reminder, in the Phase 1 trial of CUDC-907, the drug candidate demonstrated to be safe and tolerable for the treatment of patients with DLBCL and has been granted orphan designation in this indication by the U.S. FDA. Briefly, of the 25 patients with relapsed/refractory DLBCL treated in the Phase 1 with monotherapy CUDC-907 a total of nine patients experienced an objective response for an ORR or Objective Response Rate of 36%, including three patients with complete responses. Responding patients had a median duration on treatment that was over 15 months. In addition, four of the responders were retrospectively assessed to have MYC-altered disease and two responders were assessed as MYC negative. These findings provided the basis for the initiation of the Phase 2 trial of CUDC-907 in patients with relapsed/refractory MYC-altered DLBCL. This morning, I would like to provide a summary from an interim analysis of this Phase 2 trial. The Phase 2 trial as a reminder is a global study enrolling patients in over 20 centers in the U.S. and in Europe. In the interim analysis, CUDC-907 demonstrated a similar safety and tolerability profile as in the Phase 1 trial and there were no new treatment-related safety findings. Of the 36 evaluable patients in the interim analysis, seven patients experienced confirmed durable objective responses for an overall response rate of 19.4% and this included three with complete responses. In addition, and consistent with or original hypothesis and the Phase 1 findings, all seven responders in the Phase 2 study had MYC-altered disease, while no objective responses were observed in 12 patients with MYC-negative disease status. Based on these interim results, we conclude that the Phase 2 trial results are consistent with our initial hypothesis, that CUDC-907 as a monotherapy is clinically active and can generate significant durable responses including CRs, specifically in patients with MYC-altered DLBCL. The observed objective response rate in this Phase 2 trial however does fall short of our internally set target of 30%, and therefore, we believe is insufficient to serve as the basis of a request for accelerated approval of CUDC-907 for this patient population. We are currently evaluating alternative designs for a separate registration enabling trial in the MYC-altered DLBCL patient population, rather than enrolling additional patients in the existing Phase 2 study. I would now like to update on our non-clinical programs in the pre-R&D stage and begin with the IRAK4 drug candidate CA-4948. As noted before, IRAK4 kinase pathway is altered in human cancers as noted by the observed rate of activating mutations in the MYD88 gene in a number of different hematologic malignancies. We previously presented nonclinical data, which showed that CA-4948 is a potent inhibitor of IRAK4, potently inhibits TLR signaling or toll-like receptor signaling in cell based assays, and results in significant anti-tumor activity in vivo models - animal models of MYD88 mutated DLBCL. We've held initial discussions with the FDA. And this quarter we expect to file an IND to test CA-4948 in a Phase 1 trial in patients with hematologic malignancies, and in particular those with MYD88 gene mutations. Our initial nonclinical data also show encouraging effects of CA-4948 in models of AML or Acute Myeloid Leukemia, and MDS disease. We expect to initiate clinical testing of CA-4948 drug candidate in a separate Phase 1 trial for the treatment of patients with these malignancies. Now finally with regard to our drug candidate CA-327, and that is in partnership with Aurigene and was discovered by our Aurigene colleagues. CA-327, as a reminder, is an orally bioavailable small molecules that targets PDL1 and TIM3 immune inhibitory checkpoints. CA-327 is currently completing IND-enabling studies and we expect to file an IND for this drug candidate likely in the first quarter of 2018 to begin its clinical development soon after. Lastly, we are pleased to note Roche and Genentech are partners continued commitments to commercialize Erivedge globally for the treatment of patients with advanced basal cell carcinoma, as well as their efforts to explore Erivedge in combination therapy trials for the treatment of patients with myelofibrosis. With that, I will turn the call over to Jim now for a discussion of our financial results as well as providing further detail on the loan facility. Thank you.