Ali Fattaey
Analyst · Guggenheim. Please go ahead
Thank you, Jim. Good morning, everyone, and thank you for joining us today for our second quarter of 2018 business update. On today's call we will review the company's recent corporate and clinical development achievements as well as key milestones anticipated for the second half of the year. This past quarter, Curis has made steady progress advancing our three oncology drug candidates in the clinic. I would like to start with an update on our lead clinical candidate fimepinostat, which has demonstrated significant clinical benefit in patients with relapsed refractory DLBCL, and in particular those with MYC alterations. As a reminder, fimepinostat has been evaluated in a total of 105 patients with relapsed refractory DLBCL in a Phase 1 and in a Phase 2 clinical trial where treatment resulted in 19 objective responses, 9 of which were complete responses. Now 14 of these responses including 8 of the complete responses were in the 60 patients whose tumors were identified to have MYC alterations with a median duration of response of 13.6 months. Based on these results, we conclude that fimepinostat is able to provide durable benefit in patients with MYC altered DLBCL. Numerous publications have observed that patients with MYC altered disease have a poorer prognosis after front-line therapy, after stem cell transplant and in the relapsed refractory setting. And that these patients experience limited durable benefit with available therapies as compared to their non-MYC altered counterparts. Based on these encouraging results and the fimepinostat activity, fimepinostat development was awarded Fast Track designation by the FDA in May this year for treatment of patients with relapsed refractory DLBCL. It is noted that relapsed refractory DLBCL continues to be an unmet clinical need. We are continuing to design, evaluate and discuss with the FDA of pivotal clinical trial opportunities to further develop fimepinostat with the intent to -- for its registration in this patient population. These have included single-agent, single-arm studies and randomized control combination trials. We have concluded that a randomized controlled trial is preferable to formally demonstrate and secure registration of fimepinostat in this patient population. Therefore consistent with our very recent productive discussions with the FDA, we are highly motivated to test fimepinostat in combination with rituximab-based treatment regimens as a registration opportunity for fimepinostat. We are pleased with the FDA's encouragement with this approach. A combination therapy path will also provide for enrollment of patients in earlier lines of treatment as early as second line, which may further expand the use of fimepinostat for patients with DLBCL. Our primary focus in such a trial will continue to be a patient -- on patients with MYC altered disease, a population whose needs we believe remain poorly met without fimepinostat. In addition to commonly used rituximab-based regimens, we also expect to explore combinations of fimepinostat with novel anti-lymphoma agents such as BTK or BCL2 inhibitors. These agents have combined well with fimepinostat in nonclinical in vivo study using MYC altered DLBCL models and have resulted in strong additive or synergistic antitumor activity. In the coming months, we plan to initiate the necessary dose finding and safety clinical work to examine fimepinostat in combination with these treatment regimens. We will provide further updates on the status of fimepinostat developments with the start of patient dosing using these combination regimens in the second half of this year. We expect that one of these fimepinostat combination regimens will then be selected to initiate a randomized controlled trial in 2019. I would now like to turn to our second clinical candidate CA-170, the first and only orally administered small molecule checkpoint antagonist to enter the clinic, which we are developing in collaboration with our partner, Aurigene. CA-170 is a dual inhibitor targeting the PDL1 as well as VISTA inhibitory immune checkpoint pathways. CA-170 is the only VISTA inhibitor in clinical development. To date CA-170 administered orally in an ongoing Phase 1 dose escalation trial in patients with solid tumors or lymphomas have demonstrated favorable safety and evidence of immune modulation as well as tumor shrinkage in multiple patients. These clinical observations were previously presented and included doses of up to 800 milligrams administered orally once-daily. In an effort to examine increasing doses of CA-170 and to obtain a uniformly high steady-state plasma exposure level during the 24-hour period, we have now completed enrollment of patients at three increasing dose cohorts using twice-daily oral administrations. Including 600, 900 and 1,200 milligram BID. Using these doses, CA-170 continues to demonstrate acceptable safety profile and achieve the desired PK and exposure profile. We expect to present an update on the clinical profile of CA-170 from this Phase 1 trial including the BID dosing cohorts at a scientific conference in the second-half of the year. VISTA is an independent immune checkpoint pathway and CA-170 is a potent antagonist of VISTA. In nonclinical studies, CA-170 have significant in vivo antitumor activity in mouse models that do not benefit from anti-PD1 antibody treatment. We ascribed this antitumor activity of CA-170 to its ability to address VISTA in these models. Up regulation of this expression in patient tumor samples has been identified as a potential resistance mechanism to treatment with anti-PD1 antibodies in melanoma or with anti-CLA4 antibody treatment in prostate cancer. Through analysis of a large array of human tumor tissues from different cancer types, our scientists have now noted high VISTA expression in the tumor microenvironment or on the tumor cells in a proportion of these samples. We expect to present these results at a scientific conference in the second half of this year. In addition, in recent literature and scientific conferences, investigators have noted a proportion of biopsies assessed from non-small cell lung cancer, gastric cancer, triple negative breast cancer and most recently mesothelioma express high levels of VISTA on the tumor cells. CA-170 is the only VISTA inhibitor in clinical development. Based on these lines of evidence and to exploit our leading position in addressing VISTA, we plan to rapidly advance one aspect of CA-170 development in exploring its clinical activity in cohorts of patients that express high levels of VISTA including patients with mesothelioma. We expect to provide further updates on CA-170 development in these populations of patients in the second half of the year with the commencement of patient enrollment. In addition, our partner Aurigene continues to rapidly enroll patients in a Phase 2 trial evaluating CA-170 in select populations of cancer patients in India. This Phase 2 study is a significant advantage in development of CA-170 and is providing access to a large number of patients who are immunotherapy treatment naïve and who have not been subject to expensive prior lines of anticancer treatment, for whom CA-170 could provide a more pronounced benefit. Aurigene and Curis expect to provide an update from this ongoing CA-170 study at a medical conference later in 2018. This year we also initiated a Phase 1 dose escalation clinical trial of CA-4948 for the treatment of patients with non-Hodgkin's lymphoma, with an expansion stage that will focus on patients with specific alterations in the mid-88 or Toll-like receptor signaling pathways. CA-4948 is currently the only IRAK4 kinase inhibitor in clinical development for the treatment of patients with cancer. Enrollment of patients with lymphoma in this study continues to progress. We’ve recently assembled the necessary nonclinical data and rationale that demonstrate CA-170 -- I apologize, CA-4948 is active in animal models of human AML, and therefore expect to extend the current Phase 1 clinical study to enroll patients with AML in the second half of this year. We expect to provide an update on this drug candidate in the second half of 2018 at a medical conference. Finally, I would like to formally recognize Dr. Robert Martell, who is in the room with us, who recently accepted a position as Head of Research and Developments with Curis. Dr. Martel has been a practicing physician for over 20 years with a focus in oncology with extensive experience in drug development within the pharma and biotech industry. We believe Dr. Martel will be a great resource in ensuring that Curis continues to generate promising clinical oncology candidates for patients in need. With that, I will now turn the call over to Jim for a discussion of our financial results.