Ali Fattaey
Analyst · RBC Capital Markets
Thank you, Mani, and thanks to the conference call and webcast participants for joining us this morning. This first quarter for Curis was a transformative period and reflects the strategy we've been building towards as an oncology therapeutics business focused on development and eventual commercialization of innovative and effective drugs for cancer patients. The past quarter was highlighted by our entry into broad and exclusive collaboration with Aurigene for the discovery, development and commercialization of small molecule drug candidates in the areas of immuno-oncology and precision oncology. The first 2 molecules within this collaboration that we expect to take into the clinic are an oral small molecule PD-L1 antagonist, designed to disrupt PD-1, PD-L1 immune checkpoint receptor ligand interaction and result in activation of T-cells for cancer immunotherapy, and the second molecule is an inhibitor of Interleukin-1 receptor associated kinase, or IRAK4, that is intended for treatment of certain hematologic malignancies. In addition to these, the Aurigene collaboration is expected to generate a pipeline of novel drug candidates in the coming years. Our partner, Aurigene, has made significant progress in advancing the lead immuno-oncology programs and is expanding efforts to address additional immune checkpoint targets with small molecule antagonist. Aurigene is also advancing compounds under the IRAK4 program, and we expect to exercise options to exclusively license these first 2 programs in the near future. We are also pleased to have recently received orphan drug designation for CUDC-907, which is our Dual HDAC PI3 Kinase Inhibitor for the treatment of diffuse Large B-cell lymphoma or DLBCL, which represents a disease of significant unmet need, especially in the relapse refractory setting. We continue to make progress in the clinical development of CUDC-907, both in expansion stage of the Phase I trial for hematologic malignancies, which is focused on patients with DLBCL, as well as the ongoing Phase I trial in patients with solid tumors. We look forward to presenting the Phase I dose escalation results of CUDC-907 as well as available data from the expansion stage in the hematologic malignancies at the ASCO Annual Meeting later this month. We're also planning a Phase II study in DLBCL for later this year that I'll elaborate on. Organizationally, we have also grown our capabilities and staff significantly in the areas of project leadership, clinical development and operations project management, regulatory data management and translational sciences. This is all -- this level of growth is all consistent with our expectations and commitment to advance development of our key drug candidates in the clinic. Lastly, during the first quarter of 2015, we brought in approximately $65 million in proceeds from a public offering of shares of our common stock, which we expect will provide the company with cash to fund our planned operations into 2017, the period in which we expect to achieve multiple milestones across our key programs. Regarding CUDC-907, we will be presenting the results from the Phase I hematologic cancer trial at the upcoming ASCO Annual Meeting on May 31, which will include majority of the data from the dose escalation stage of the trial as well as available data from the expansion stage of the trial, which is still ongoing. In addition to ASCO, we will also be presenting these results at the Congress of European Hematology Association in Vienna, Austria, and at the International Conference on Malignant Lymphoma in Lugano, Switzerland, both in June of this year. In the CUDC-907 Phase I trial in patients with relapsed and refractory lymphoma and multiple myeloma, we've previously reported that over 40 patients had been treated in the dose escalation stage in which we evaluated CUDC-907 at escalating doses using various treatment schedules. And I want to point out that since we will be presenting the Phase I data at ASCO, I will only reiterate what we have mentioned thus far: The safety profile of CUDC-907 remains consistent with what we have reported previously, with diarrhea, thrombocytopenia and fatigue being the most frequent side effects, and diarrhea and hypoglycemia identified as a dose-limiting toxicities. Using the optimized dosing schedule of administration of either 60-milligram dose of CUDC-907 given on a schedule of 5 days on, 2 days off, or 120-milligram dose of CUDC-907 given 3 times per week, adverse events have been manageable and consistent with CUDC-907's known mechanism of action. Additionally, pharmacodynamic analysis has shown HDAC and PI3 kinase enzyme modulation using patient's peripheral blood mononuclear cells or PBMCs as tissue resources. Among the 8 disease evaluable patients with Diffuse Large B-cell Lymphoma that have been treated in the dose escalation stage of the trial, we reported that 7 patients had experienced tumor shrinkages, including 1 patient with a complete response, 3 patients with objective partial responses and 3 patients with stable disease as their best response. In general, patients with objective responses had received higher or more intense dosing schedules. We are continuing to enroll in the expansion phase of the study and expect to enroll up to 12 patients with DLBCL in the monotherapy expansion phase of the study. In addition, we are planning for a Phase II study in the relapsed refractory DLBCL population. There are 2 general registration path or trial designs that we are evaluating currently. One is a single-arm monotherapy study with the objective response rate as the endpoint and the second is the randomized combination therapy study with PFS or overall survival as the end points. There are a number of variables that will inform our eventual decision, including, first and foremost, the combined dose escalation and expansion stage results in DLBCL patients; discussion with our key investigators and advisors regarding the merits and feasibility of each path; and finally, formal discussions with the regulatory authorities regarding our data, designs and plans. To expedite and enable a possible combination therapy path, we have recently opened an independent arm in the ongoing Phase I trial to enroll patients with DLBCL for treatment with CUDC-907 in combination with standard dose of rituximab. We are encouraged by the single-agent activity in patients with relapsed refractory DLBCL observed to date, and we look forward to evaluating additional data from the monotherapy expansion as well as the rituximab combination arms to further define the regulatory path for CUDC-907 in treating relapsed refractory DLBCL patients. In addition to the ongoing study in hematologic malignancies, we also continue to enroll a second independent Phase I trial testing CUDC-907 in patients with relapsed or advanced solid tumors. This includes patients with HER2-negative/hormone receptor positive breast cancer for those patients with midline carcinoma with NUT rearrangements or NMC tumors. No results to report on -- from this ongoing study as of yet, and we look forward to providing further updates from this study during the second half of this year. I'd now like to discuss our newly established collaboration with our Aurigene colleagues. This is a collaboration, of course, that we are very excited about. And as we have stated previously, this is a multiyear relationship focused on the discovery, development and commercialization of small molecule drug candidates in the areas of immuno-oncology and precision oncology. Both Curis and Aurigene teams are currently fully engaged with advancing molecules from multiple programs in the collaboration, and we expect to exercise options under this collaboration to exclusively license drug candidates in the near future. Let me now focus in greater detail on the immuno-oncology efforts in the collaboration. And I also want to mention that we have an updated corporate presentation on our website and would encourage you to refer to it for additional details. As an introduction, over the last several years, perhaps the most exciting treatment strategy that has emerged in our field is the possibility of employing and activating the immune system against the patient's tumor. One of these strategies that has demonstrated excellent and amazing clinical benefit is exemplified by the recently approved drugs ipilimumab, nivolumab and pembrolizumab, and is based on targeting and destructing the interactions between the inhibitory receptors, such as CTLA-4 and PD-1 that are expressed on the surface of T-cells, and their cognate ligand, such as CD80 or CD86 and PD-L1 or PD-L2 on the surface of other immune cells or tumors cells. This strategy results in the activation of T-cells, which then go on to build and generate an effective immune response directed at the patient's tumor cells. Because of the expression of these receptors and their respective ligands on the surface of cells and because of the technical ability to regenerate therapeutic agents directed at these molecules, thus far only monoclonal antibodies that target either the receptor or the ligand have been employed. What we believe sets our collaborator Aurigene's approach to part is their relatively bold attempt to target and disrupt the same receptor ligand interactions with small molecules that are designed and can be administered orally and yet result in the same potent activation of T-cells as well as antitumor activity that are, thus far, seen in the pre-clinical setting. Now PD-L1, PD-1 is only the first receptor ligand interaction that our colleagues at Aurigene have attempted to address, and the initial lead molecules that binds to PD-L1 and effectively disrupt the PD-L1, PD-1 interaction is currently expected to advance into the GLP toxicology studies in preparation for IND filing by Curis this year. One of the key properties of the PD-L1 targeting molecules is their ability to selectively induce proliferation of human T-cells and result in production of interfering gamma in culture. The same results are also seen in the mouse T-cell setting. Additionally, although the former IND-enabling toxicity studies are yet to be conducted, thus far, the safety profile of these molecules has been excellent and devoid of any activity against other enzymes, receptors in other categories of proteins, and the preliminary EnVivo safety profile has been clean as well. When the lead small molecules are administered orally in animals bearing syngeneic mouse tumor models that expressed PD-L1, they demonstrate effective anti-cancer activity in multiple tumor models, such as colon cancer and melanoma models, that is very similar to that demonstrated by using a reference anti-PD-1 antibody in these same models. We believe that this is a very important proof of concept for these molecules and the ability to disrupt immune checkpoints using small molecules. Some of the supporting preclinical data can be found in our most recent corporate slide presentation, as I mentioned, and we also expect to present more detailed data at an appropriate scientific meeting. We believe that Aurigene's approach is unique, not only because it is a small molecule targeting -- not only because it is a small molecule that targets what is currently being addressed with antibody molecules, but also because it provides the opportunity to adjust the dose and schedule of administration of the therapeutic, both for monotherapy and hopefully, in the near future, for potential combination therapy regimens. Also importantly, this same chemical strategy and approach is being used by our colleagues at Aurigene to generate molecules that target other immune checkpoint receptor ligand interactions, and hence, this provides the opportunity for us for a pipeline of small molecule drug candidates that have the potential to be used on their own in different cancer settings or be used in combination with one another in the same cancer setting or possibly use with other treatment strategies, including some of Curis' other proprietary drug candidate, as narrated in the combination setting. Aurigene is currently working to optimize additional small molecules that target immune checkpoint pathways other than those involved in the PD-1, PD-L1 interactions. Now the second part of our collaboration with Aurigene is also consistent with our focus to develop small molecules that target genetic alteration in hematologic malignancies. As we discussed earlier, CUDC-907 represents our lead drug candidate in this area. As part of the Aurigene partnership, the second molecule in our collaboration with them is a kinase inhibitor that targets the Interleukin-1 receptor associated kinase or IRAK4 enzyme. IRAK4 is an important transducer of signals through the toll-like receptors and interleukin receptors, such as Interleukin-1 as part of the innate immune signaling pathways which control diverse cellular processes, including inflammation, apoptosis and cellular differentiation. Our interest in IRAK4 stems from the observation of high rate of genetic alterations in the adapter gene, MYD88, in B-cell malignancies including the ABC or activated B-cell sub-type of the DLBCL as well as in patients with Waldenström's Macroglobulinemia. Now MYD88 is an adapter protein that connects toll-like receptors and interleukin receptors with IRAK4 and results in IRAK4 activation. Our colleagues at Aurigene recently presented the properties of small molecule IRAK4 inhibitors at the AACR conference that was held in Philadelphia last month. And we draw your attention to post [ph] briefly our colleagues Aurigene reports it, that lead IRAK4 molecules have been identified that potently and selectively inhibit the kinase in biochemical assays and inhibit proliferation of DLBCL cell lines, in particular, those cell lines that harbor the MYD88 gene mutation in culture or when the same cells are grown as xenografts in mice. Consistent with IRAK4's role in B-cell signaling, these inhibitors are also highly active in B-cell-driven inflammatory disease models in EnVivo. We expect to select the development candidate in the near term to take into IND-supporting studies, and we would initiate clinical development in specific heme malignancies early next year. We believe this collaboration is a unique opportunity for us to align complementary expertise with Aurigene predominantly focusing in the preclinical settings and Curis focusing in the development and commercialization disciplines of this relationship. We are each committed to bringing considerable resources in this fairly competitively field and intent to do this in a very cost-effective manner. I'd now like to turn to Erivedge, which is being developed and commercialized globally by Genentech and Roche under our collaboration. Roche continues to concentrate on the global commercialization of Erivedge for the treatment of advanced BCC in key territories worldwide. We recorded royalty revenues of approximately $1.67 million for the first quarter of this year as compared with $1.28 million for the first quarter of 2014, which represents a year-over-year increase of approximately 30%. Approximately 70% of Erivedge sales for the first quarter of this year were derived in the U.S., with the remaining sales being generated outside of the U.S. Outside of oncology, Roche continues to indicate an interest in investigating Erivedge in idiopathic pulmonary fibrosis and potentially using an amended protocol to incorporate Esbriet or pirfenidone, the new standard of care for IPF into the trial design. Roche has stated that the first patient could be treated in this study is pending in anticipation of the trial design amendment to incorporate the new standard of care, Esbriet. I would now like to turn the call over to a Mike Gray for his discussion of our financial results. After which, we will open the call for questions.