Spiro Rombotis
Analyst · Mike King of JMP Securities
Thank you, Bill, and thank you all for joining our quarterly call. As many of you know, we have completed enrollment in SEAMLESS, our Phase 3 trial of oral sapacitabine capsules as a frontline treatment of patients aged 70 years or older with acute myeloid leukemia or AML who have refused or aren’t fit for intensive chemotherapy. The study is in the firm-out [ph] phase and we’re encouraged that investigators continue to treat and/or follow-up patients as appropriate. The primary end-point of this trial is overall survival. SEAMLESS were sized for approximately 485 patients and was powered at 90% to detect an improvement of survival against an active controller arm of intravenous decitabine. The trial design re-specifies that 424 events need to be observed in order to unblind the data. Approximately 20% of these events remain to be observed before mature data becomes available for analysis. Overall reliable estimation of when data maturity will be reached is difficult. We continue to conservatively estimate that we will reach the specified number of events between the second half of 2015 and the first half of 2016. At that point we will break the randomization code and evaluate the data. As a reminder, on previous calls, we have discussed the outcome of the interim analysis for futility. We believe it is important not to judge the final outcome of clinical studies based on interim data. Our view remains that the decision to submit a dossier for regulatory approval will depend on the totality of the data and their clinical relevance in this patient population. We believe that decitabine’s European approval is a frontline treatment in AML maybe relevant to our assessment of submissibility of the SEAMLESS data. Planning for potential regulatory submissions, we’re in the process of preparing a pediatric investigational plan for sapacitabine for submission to the European Medicines Agency. A pediatric investigational plan is required before a marketing authorization application or MAA can be accepted or validated by EMA. Let us now turn to the other exciting developments with regard to our Cyclin Dependent Kinase or CDK inhibitor program. A decade and half since the award of a Nobel Prize for medicine and physiology for the discovery of CDKs and checkpoint control of cancer cells, they’re finally emerging as a major therapeutic class of anti-cancer agents. Because of their function, and cell-cycle checkpoint inhibitors, drug targeting CDK enzymes have been recently elevated through a high priority by clinical investigators and the pharmaceutical industry. We have also witnessed this base on the number of incoming requests regarding our CDK program and in particular the high awareness of the properties of CYC065. The FDA approval earlier this year of Pfizer’s palbociclib or Ibrance which is the first CDK inhibitor through which the market has reaffirmed the importance of the CDK class. Two other CDK inhibitors are abemaciclib from Lilly and ribociclib from Novartis are in Phase 3 developments. All three of these molecules target CDK4/6 enzymes. Pfizer and Novartis have highlighted their CDK programs as major value drivers in investor presentations. It took a while but CDKs are now validated targets. We believe that our CDK inhibitor program and in particular CYC065 may also become an important value driver for Cyclacel. Although in our public communications, we have concentrated on our most advanced programs related to sapacitabine, we have been quietly advancing our CDK portfolio with the objective of bringing to patients in need a novel treatment option. To this end, we are happy to report that we have been cleared by the FDA to begin first insulin [ph] Phase 1 clinical trial of CYC065 under a company IND in patients with advanced solid cancers and lymphomas. This Phase 1 study will commence as soon as possible following Institutional Review Board or IRB approval. Of note, development of the preclinical package supporting our IND submission for CYC065 has been mostly financed by non-dilutive stockholder friendly grants awarded to Cyclacel by the United Kingdom government. As a historical reminder, Cyclacel has been investing in the biology of cell cycle control and initial addition of CDK enzymes with small molecules since the founding of the company some 18 years ago. Out of the approximately dozen CDKs known to science our founder Professor Sir David Lane, chose to focus on CDK2/9 enzyme inhibition as a promising anti-cancer strategy. This was because this isoform profile results in death of cancer cells by apoptosis and disruption of their ability to copy errors in DNA by a process called transcription. This is a different anti-cancer mechanism to event of CDK4/6 inhibitors. Targeting CDK4/6 may result in cancer cells entering into a non-lethal dormant condition called senescence which is implicated in the evolution of resistance. Senescent non-proliferating cancer cells learned to bypass the effect of therapy by developing resistance mechanisms but ultimately make them immortal or impossible to kill. While the cancer relapses after the cells resume proliferating, patient prognosis is usually poor. The rationale of our strategy to target CDK2/9 is to endure cell death via cell-cycle checkpoint control. Obviously, dead cells cannot adapt to develop resistance and become immortalized. In addition, our preclinical data show that CYC065 reverses sensitivity of cancer cells that have already become resistant to the effect of widely used targeted anti-cancer drugs like trastuzumab or Herceptin. Even these benefits are also observed in clinical trials CYC065 may represent an important therapeutic alternative addressing a large market opportunity. CYC065 targets CDK2/9 with nanomolar potency. Conveniently, it can be administered by both the intravenous and/or routes. Data from clinical IND-enabling studies with 065 represented last month at the American Association of Cancer Research or AACR meeting. In these studies, CYC065 demonstrated inhibition of key cancer and leukemia survival mechanisms and cause death by apoptosis in cancer cells. Cyclacel data showed that CYC065 was effective against acute myeloid leukemia or AML in particular AML with genetic abnormalities such as mixed lineage leukemia rearrangements MLLR which confer a very poor prognosis. Data from the Yale University showed that CYC065 was also effective against uterine cancer cells including resistant to chemotherapy and was especially potent in uterine cancer cells in which cyclin E, the partner protein of CDK2, was amplified or over-expressed. These latter findings reproduced previously published data with breast cancer cells resistant trastuzumab and provide the rationale for development of CYC065 in the multiple-gynecological cancers. At AACR this year, we witnessed a high level of interest by both investigator and company attendees in CYC065 data. Our take away from this observation is that our differentiated strategy of inhibiting CDK2/9 is attracting a lot of attention by the oncology community. Assuming our Phase 1 program with CYC065 is successful, potential indications under consideration for future clinical evaluation based on mechanism and preclinical data include hematological malignancies including AML, ALL, CLL and certain lymphomas and solid tumors, including HER2 Positive breast cancer, resistant to trastuzumab or Herceptin, Triple-Negative breast cancer and/or Homologous Recombination or HR deficient gynecological tumors including BRCA positive breast, ovarian and uterine cancers. With the latter indication, potentially in a combination of CYC065 with sapacitabine aiming to reproduce previously reported clinical anti-cancer activity of Seliciclib and sapacitabine combination. As a reminder, we are currently studying a combination regimen of seliciclib and sapacitabine at the Dana Farber Cancer Institute. Initial data from this Phase 1 study showing confirmed endurable partial responses or PRs in germline BRCA positive patients with breast, ovarian and pancreatic cancers who were reported at the 2013 AACR. We believe that there is relative scarcity of isoform selective CDK2/9 inhibitors and that CYC065 may offer a competitive advantage to Cyclacel or potential partners. In addition to CYC065 we have acquired extensive scientific and clinical experience with our first generation CDK2/9 inhibitor seliciclib. This drug has been administered orally to over 400 patients with evidence of anti-cancer activity in non-small cell lung, Nasopharyngeal and other cancers as both monotherapy and combination therapy. Seliciclib is approximately 40 times less potent against CDK2/9 than CYC065. However, as seliciclib is sparing to bone marrow cells, certain investigator-sponsored trials or ISTs are evaluating seliciclib in endocrinologic and inflammatory indications in patients who have failed prior treatments. As is common with ISTs, Cyclacel is providing drug clinical supplies but is not responsible for these studies operationally or financially. Before turning the call over to Paul, let me summarize our key upcoming milestones. For sapacitabine continued to follow-up in raw patients in SEAMLESS until the specified number of events expected to occur between the second half of 2015 and the first half of 2016. Submit a pediatric investigation plan to EMA. Make a decision on Phase 2b randomized control trial in MDS following review of all relevant clinical data with mature follow-up. Report updated data from the Phase 1 study of sapacitabine in combination with seliciclib in solid tumor patients, in particular those carrying BRCA mutations. For CYC065 our second generation CDK inhibitor, initiate the Phase 1 clinical trial in patients with advanced solid tumors and lymphomas subject to IRB approval. For seliciclib our first generation CDK inhibitor, support academic collaborators in ISPs of seliciclib in patients with Cushing’s Disease and Rheumatoid Arthritis who have failed prior treatments. Paul?