Spiro Rombotis
Analyst · Roth Capital
Thank you, Alex, and thank you, everyone, for joining us today for our fourth quarter and full year 2018 business update call. Cyclacel is proud to report a year of progress in its targeted oncology strategy with achievement of significant milestones in 2018. These include an important alliance with MD Anderson Cancer Center, involving testing our 3 clinical stage drugs across 4 protocols in patients with hematological malignancies. On today's call, I will begin with an overview of our business strategy and accomplishments on Cyclacel's multiple clinical programs. I will then turn the call over to Paul to provide financial highlights for the fourth quarter and full year ending December 31, 2018, which will be followed by a Q&A session. A key pillar of our business strategy is to target patients with overexpression of cancer-resistant proteins. These proteins are central to the ability of cancer to evade the treatment effect of anticancer drugs, which eventually lose their effectiveness. They're often referred to as prosurvival proteins as they help cancer cells survive with the cancer therapy and gain an advantage over normal cells. Suppressing prosurvival proteins is, therefore, a promising therapeutic strategy to address the growing problem of resistance. This is particularly true for recently approved drugs as emergence of resistance is a major concern in new treatment plans for patients. As new drugs stop working against cancer after early effectiveness, risk of disease progression, relapse and death increase undermining society's return on investments. Cyclacel's main strategy to overcome this problem is by targeting proteins whose overexpression correlates with increased resistance, such as members of the Bcl-2 protein family, including Mcl-1 and also overexpression of the MYC and cyclin E cancer proteins. Mcl-1, in particular, received wide attention during 2018 medical conferences. Multiple studies show that suppression of Bcl-2 and Mcl-1 restore sensitivity of cancer cells to the drugs that previously stopped working. One such drug, venetoclax, has been approved for second line chronic lymphocytic leukemia, or CLL. More recently, a hallmark study identified cyclin E as a key resistance pathway to breast cancer treated by CDK 4/6 inhibitors, a blockbuster class of new medicines for a major type of breast cancer. A further strategy is to target inherited mutations in DNA-damaged pathways, such as BRCA, or BRCA. The modest duration of clinical benefit to PARP inhibitors, the standard of care approved for BRCA-mutant gynecological cancers, suggest the need for novel drugs used in combination to extend the durability of response, and ultimately, survival. In execution of our strategy, we have opened for enrollment in 2 -- first patients in 2 out of 4 studies under our MD Anderson collaboration. These are the Phase I study of the combination of CYC065 and venetoclax in relapsed/refractory CLL and the first-in-human Phase I study of CYC140 in advanced leukemias. Protocols for the other 2 Phase I studies have been finalized and will be submitted to IRB shortly. These are a combination of CYC065 of venetoclax and a combination of sapacitabine and venetoclax, both in patients with relapsed/refractory AML or MDS. Also the first patients with BRCA-mutant breast cancer were treated in the investigator-sponsored study, or IST being connected at the Dana-Farber Cancer Institute with a combination regimen of sapacitabine and the PARP inhibitor, olaparib. Dual targeting of the DNA Damage Response pathway with the addition sapacitabine to olaparib may enhance the efficacy of the current standard of care for such patients. With capital on hand estimated until the end of 2020, we have the resources to take us through key clinical milestones in our ongoing clinical studies. Having reviewed our strategy and summary of activities, we will next provide a review of our programs starting with our lead candidate, CYC065, an inhibitor of CDK2 and CDK9. We believe that CYC065 is the first investigational drug to have consistently demonstrated durable suppression of Mcl-1 in patients at tolerable dosing. At the 2018 AACR Annual Meeting, investigators presented results demonstrating proof of mechanism in durable Mcl-1 suppression after a single administration of CYC065. In Part 1 of the study, 11 out of 13 patients treated at the recommended Phase 2 dose experienced sustained suppression of Mcl-1 for at least 24 hours. Anticancer activity was observed in six patients. Cyclacel is now enrolling Part 2 of the study, which is evaluating CYC065 monotherapy with a more intensive dosing schedule of two days per week for 2 weeks of a 3-week cycle. The study will provide the important safe [Technical Difficulty] and pharmacodynamic data to inform combination trials, including assessment of biomarkers related to CYC065's mechanism, such as overexpression or amplification of Mcl-1, MYC or cyclin E. Part 3 of this study to be initiated shortly will evaluate bioavailability of an oral CYC065 formulation. A paper recently published in the Journal of Clinical Oncology identified overexpression of cyclin E as a mechanism by which estrogen-receptor positive, HER-2 negative breast cancer escapes the effects of combination treatment with palbociclib, a CDK 4/6 inhibitor and hormone therapy. These data from the successful randomized Phase 3 PALOMA-3 study also identified cyclin E as the predictor of sensitivity to palbociclib regimens. Incubation of the CDK2 cyclin E complex, the target of CYC065, was proposed as a potential therapeutic approach to prevent early progression on CDK 4/6 inhibitors. These findings support and extend previous preclinical data. For example, CYC065 activity was demonstrated in cyclin E-amplified models of palbociclib-resistant breast cancer. Further data showed that cyclin E is a resistance mechanism to HER-2 positive breast and uterine cancers treated with trastuzumab or Roche's Herceptin. Cyclin E-amplified tumors are found in the patients with gynecological and other cancers and represent a large unmet medical need. The findings support CYC065's broad therapeutic potential and unique target profile among CDK inhibitors. We recently enrolled the first patient with CLL in our Phase I combination study of CYC065 and venetoclax, a drug approved for CLL and AML. This patient has been treated without dose-limiting toxicity with the approved dose of venetoclax and CYC065 at 64 milligrams per meter squared. Venetoclax works by inhibiting the prosurvival proteins Bcl-2, but has no significant activity against Mcl-1. We believe that a double-hit strategy of simultaneously lowering both Bcl-2 and Mcl-1 may have synergistic effects. The biological rationale for this strategy is supported by preclinical data at the 2018 AACR showing enhanced benefit of the CYC065-venetoclax combination in CLL models and induction of prolonged suppression of both Bcl-2 and Mcl-1. Importantly, the combination showed activity in certain 17p deleted CLL samples that were not sensitive to either compound on its own. The protocols for the combination studies in relapsed/refractory AML or MDS evaluating CYC065 and venetoclax and also sapacitabine and venetoclax are ready for submission to the IRB. These combination studies are being run as part of our collaboration with MD Anderson announced in October 2018. We are proud to have established this 3-year risk-sharing alliance, enabling clinical evaluation of 3 Cyclacel candidates in patients with hematological malignancies, including CLL, AML, MDS and other advanced leukemias. As part of the collaboration, MD Anderson will conduct 4 clinical studies enrolling up to 170 patients, investigating CYC065, CYC140 and sapacitabine in combination with approved therapies. The MD Anderson alliance allows Cyclacel to advance our clinical pipeline in a cash-sparing manner, while leveraging MD Anderson's expertise to recruit eligible patients. Importantly, Cyclacel remains the sponsor for all studies. In our DNA Damage Response program, 2 patients with BRCA-mutant breast cancer have been dosed in a Phase Ib/2 study evaluating sapacitabine in combination with the approved PARP inhibitor, olaparib or AstraZeneca's LYNPARZA. According to the investigators at Dana-Farber, both patients achieved tumor shrinkage. This IST is planned to enroll approximately 64 patients with Cyclacel and AstraZeneca providing clinical supplies. PARP inhibitors are currently approved standard of care for homologous recombination deficient or HIV-positive patients with breast and ovarian cancer, which includes those with BRCA mutations. Sapacitabine works by an HRD-relevant mechanism that is distinct from the mechanism of action of PARP inhibitors. Sapacitabine has also demonstrated activity in BRCA-positive breast cancer with 1 patient still on drug after 6 years of therapy. The two therapies administered in combination could thus provide additional benefit to these patients for whom limited treatment options exist. We have continued enrollment in Part 3 of the Phase I study evaluating a revised dosing schedule of sequential sapacitabine and seliciclib, our first-generation CDK inhibitor, in BRCA-positive patients with advanced breast, ovarian or pancreatic cancer. Data from an expansion cohort from this study will be presented next week at the 2019 AACR. As an update on our work with sapacitabine in AML, we completed stratified and exploratory subgroup analysis and defined a subgroup of patients for whom the sapacitabine regimen may represent an improvement of a low-intensity treatment by decitabine alone. Following consultation with 3 EU regulatory authorities regarding a potential approval pathway for sapacitabine, we intend to submit a request for scientific advice through the Scientific Advice Working Party of the European Medicines Agency. In our CYC140 Polo-Like Kinase, or PLK 1 inhibitor program, the first patient has been dosed in a Phase 1 first-in-human study in patients with advanced leukemias. CYC140 is a small molecule, selective PLK 1 inhibitor that has demonstrated potent and selective target inhibition and high anticancer activity in xenograft models of human cancers. This study is also part of the MD Anderson alliance. On the corporate front, we would also highlight the addition of Dr. Robert J. Spiegel to the company's Board of Directors. Dr. Spiegel brings over 30 years of medical, R&D and operational experience in the biopharmaceutical industry. In summary, as we continue to execute on our strategy to advance our clinical development plans, our key milestones for the next 12 months would include: Report expansion cohorts Phase I data with an oral sequential regimen of sapacitabine and seliciclib in patients with BRCA-mutant metastatic breast cancer at the 2019 AACR; initiate CYC065 venetoclax Phase I study in patients with relapsed/refractory AML or MDS; initiate sapacitabine venetoclax Phase I study in patients with relapsed/refractory AML or MDS; report initial data from the CYC065 venetoclax Phase I studies in leukemias; report initial data from the CYC140 Phase 1 first-in-human study; report initial data and bioavailability from the Phase I study of an oral formulation of CYC065; report updated CYC065 Phase I data in patients with advanced solid cancers; report data from the Phase Ib/2 IST of sapacitabine-olaparib combination in patients with BRCA-mutant metastatic breast cancer when reported by the investigators; and determine regulatory pathway and submissibility of sapacitabine in elderly AML. I would now like to turn the call over to Paul to review our fourth quarter and full year 2018 financials. Paul?