Spiro Rombotis
Analyst · ROTH Capital Partners
Thank you, Jan, and thank you, everyone, for joining us today for our second quarter 2020 business update call. First and foremost, we hope that all of you listening to our webcast are safe and well. The global pandemic continues to affect nearly all human activity and create uncertainty in every business sector. It is becoming clear to society that in order to emerge from the COVID-19 crisis, we need to create novel science-based solutions, and that pharmaceutical innovation will play a central role in this fight. And Cyclacel, we take our corporate social responsibility very seriously, including protecting the health and safety of our employees, the patients we serve, and the communities in which we live and work. We have maintained relevant protective measures and are following government orders, with our employees mostly working from home. To date, we have worked closely with clinical trial sites to ensure adequacy of clinical supplies and compliance with relevant FDA guidance. We have been advised by clinical investigators that they continue to screen and register patients in our studies and remain on track with enrollment. As an illustration, we have enrolled a total of 86 patients in company-sponsored studies, with fadraciclib, sapacitabine, and CYC140 as monotherapy and in combinations thus far. At the same time, we cannot assume that circumstances, such as localized spikes, or a second surge, will not make it more difficult for patients to remain on or join our studies. Cancer patients faced increased risks in this environment, such as frequency of visits and translational research requirements. Like other sponsors, we are working with our collaborating investigators to address such matters in our trial design. Cyclacel's business strategy is to build an innovative pipeline, addressing the rising problem of cancer resistance. We are studying the ability of our agents alone and in combination with other drugs to improve anti-cancer effectiveness and treatment outcomes. We are pleased to report continued progress, and will briefly describe on today's call our program for advancing our lead drug, fadraciclib. Based on current spending plans, we estimate our cash and equivalents of $25.3 million as of June 30, 2020 will provide a cash runway to the end of 2022. We will next review our lead development program. Fadraciclib, our novel CDK inhibitor, targets the CDK and nine isoforms, which act as key components of the p53 pathway. Activity against CDK2 results in reduction of cyclin E, and again, CDK9 in reduced expression levels of MCL1. We were pleased to announce the publication in PLOS One of a peer reviewed study of fadraciclib by scientists from Cyclacel and the Institute of Cancer Research in London. The findings from the study strengthen the mechanistic rationale for fadraciclib's potential as an anti-cancer therapy, including the benefits of inhibiting both CDK2 and CDK9, and elucidate the roles of cyclin E, MCL1, and MYC overexpression. Furthermore, independent findings from Duke University reported at the ASCO 2020 Virtual Scientific Program corroborate the attractiveness of this dual targeting approach against CDK2 and CDK9. Cyclacel is evaluating fadraciclib as a single agent in patients with solid tumors, and in combination with other drugs in patients with hematological malignancies. We are also preparing our planned Phase 1 study in genealogical cancers. We will provide details on the progress of these studies later on, but we'd first like to review the relevance of fadraciclib's mechanism in [Technical Difficulty]. Overexpression of cancer resistance proteins, such as MCL1, or amplification of oncoproteins, such as cyclin E, are associated with the escape of cancer cells. MCL1 is one of the 10 most frequently overexpressed cancer genes, and as a member of the BCL2 protein family, including BCL2, BFL1, and BCL-XL. These proteins act as pro-survival mechanisms for cancer. Cyclin e, a protein encoded by the CCNE gene, is overexpressed in several gynecological cancers, including breast, endometrial slash uterine, and ovarian. Addiction to cyclin E enables cancer cells to escape death after anti-cancer therapy. Suppressing these proteins forces aberrant cells into apoptosis, or programmed cell death. Cyclacel's therapeutic strategy is to suppress the expression of such proteins and reactivate the apoptotic machinery, leading to cancer cell death. Recent discoveries of the importance of MCL1 have resolved in a race to bring to market medicines suppressing this protein. We believe that fadraciclib is a leader in this race, based on demonstration of durable suppression of the protein in peripheral blood mononuclear cells and anti-cancer activity as monotherapy in heavily pre-treated patients with solid tumors. MCL1 suppression was observed in the majority of patients enrolled at the Recommended Phase 2 Dose, or RP2D, in part one of our 065-01 dose escalation study, using a sparsely administered schedule. We enrolled 26 patients who received fadraciclib as a single four-hour infusion every three weeks. Nearly all patients who achieved stable disease with tumor shrinkage had molecular markers relevant to the drugs mechanism, including MCL1, cyclin E, and/or MYC amplification. We have enrolled a further 23 patients in the ongoing part two of the study with a more frequent dosing schedule of one hour infusion on days one, two, eight, and nine every three weeks. Escalation in part two has reached the fourth dose level, and additional patients have been enrolled to establish RP2D. As previously reported, a patient at the fourth dose level with heavily pretreated MCL1 amplified endometrial cancer achieved radiographically confirmed partial response or PR after a month and a half on fadraciclib. This patient is continuing on study after over a year on the same dose of fadraciclib. After the last restaging, shrinkage in her target tumor lesions has improved to 83%. Other patients achieved stable disease, including a patient with cyclin E amplified ovarian cancer with tumor shrinkage of 29% after four months of fadraciclib monotherapy. We have submitted data from part two of this study for publication at an upcoming oncology conference in late fall. On our last quarterly call, we described plans to further explore fadraciclib in a tissue agnostic precision medicine driven study, evaluating patients with gynecological cancers. The concept behind the study broadly follows the precedent setting approval of pembrolizumab in microsatellite instability high or mismatch repair cancers. This study is planned as an open label, parallel cohort study design, with an initial sample size of 60 patients, with each cohort enrolling 20 breast, endometrial slash uterine, or ovarian cancer patients respectively. Patients will receive fadraciclib monotherapy, and subsequently, combination therapy, depending on available options. Preparations for the are study advancing in consultations with experts, along with development of the study design. In parallel, we are selecting a vendor to provide genomic analysis for the biomarkers of interest, MCL1, cyclin E, and or MYC overexpression. Once the study has started in early 2021, we expect enrollment to take approximately a year, notwithstanding pandemic delays. In addition to intravenous administration of fadraciclib, we're evaluating an oral capsule formulation. We have dosed four patients to date and reached the second dose level. Initial pharmacokinetic or PK data demonstrated a PK profile closely overlapping that of the IV administration, with encouraging exposure levels at the equivalent dose. In our hematological malignancies program, we have opened two dose escalation studies to test the hypothesis that suppressing MCL1 and BCL2 can result in anti-cancer activity against relapsed or refractory leukemias. MCL1 plays a dominant role in AML, and is supported by preclinical evidence of synergy of fadraciclib and venetoclax in inducing apoptosis. We're evaluating a fadraciclib and venetoclax combination in patients with relapsed or refractory AML or MDS in the 065-03 study, and relapsed or refractory chronic lymphocytic leukemia or CLL in 065-02. The primary endpoint of each study is the determination of RP2D and safety. In our 065-03 AML study, anti-leukemic activity consistent with the drug's mechanism has been reported in four out of 11 patients dosed. These heavily pre-treated patients receive the combination of oral venetoclax and escalating doses of fadraciclib on a four-hour infusion schedule once every two weeks. Based on the observed activity and previously reported reductions of leukemic blasts in the peripheral blood of patients treated from lower doses with a combination, we plan to evaluate additional, more frequent dosing schedules. In CLL, BCL2 overexpression is the main feature, and MCL1 is an escape mechanism. Leukemia cells, especially in the lymph nodes, may stop responding to venetoclax, followed by relapse, often associated with MCL1 over expression. Eradicating CLL in the lymph nodes, and achieving minimal residual disease or MRD negativity is an important treatment objective. In 065-02, enrollment has been slow, reflecting the long relapse free survival after frontline CLL therapies. Given that eventually, a large number of patients will relapse, investigators have advised Cyclacel to persist as an unmet medical need is emerging. Five patients have been treated so far up to the fourth dose level, or 150 milligrams per meter squared. The first two patients failed ibrutinib therapy, and one of the two also failed CAR-T. They were those two once every two weeks with 64 milligrams per meter squared of fadraciclib and venetoclax as per label post ramp for five and six cycle respectively, which was well tolerated. Both patients had continued shrinkage of their lymph nodes, and one was MRD-negative after five cycles on the combination. A third patient now, dosed at 85 milligrams per meter squared of fadraciclib also achieved MRD negativity after six cycles on the combination. Both of these studies are part of our Risk Sharing Alliance with the University of Texas MD Anderson Cancer Center, whereby MD Anderson assumes patient costs for all studies, and we provide investigational drugs and other limited support. The MD Anderson Alliance also includes clinical trials with our two other programs, sapacitabine and CYC140. In our DNA Damage Response Program, 682-11, we're evaluating the safety and effectiveness of an oral combination of Cyclacel's nucleoside analog sapacitabine with venetoclax in patients with relapsed or refractory AML or MDS. This is a dose escalation study, with 12 patients enrolled to date. Two patients previously treated with combination therapy, including hypomethylating agents, have achieved five and six cycles of treatment, respectively. In addition, an investigator sponsored trial, or IST, is enrolling at the Dana Farber Cancer Institute, evaluating a combination of sapacitabine with olaparib AstraZeneca Lynparza in patients with BRCA-mutant breast cancer. Seven patients have been enrolled, with one partial response and prolonged stable diseases observed. In our antimitotic program, we're evaluating CYC140 a polo-like kinase, or PLK1 inhibitor, which like fadraciclib, we discovered in house. Six patients with advanced leukemias have been recruited to 140-01, our first in-human single agent dose escalation study. No dose limiting toxicities have been observed thus far. CYC140 is a small molecule selective PLK1 inhibitor that demonstrated potent and selective target inhibition and high activity in xenograft models of human cancers. We have received interest from investigators to study CYC140 in patients with solid tumors, which we are now evaluating. Turning to our other ISTs, we are collaborating with an international cooperative group to evaluate fadraciclib in histologies where MYC overexpression is prevalent, and we'll provide updates once the study is open for enrollment. The University of Edinburgh continues to evaluate the comparative potential of our CDK inhibitors, fadraciclib and seliciclib, for reducing runaway inflammation and subsequent lung injury in pre-clinical studies and plasma donated by patients with COVID-19 disease. We will report the findings of the studies at Edinburgh, once reported by the investigators. In addition to other ISTs, at Cedars Sinai Medical Center, and the University of Newcastle are evaluating seliciclib, our first generation CDK inhibitor, in patients with Cushing's disease and rheumatoid arthritis, respectively. During the quarter, we continued to move our programs forward to multiple data outcomes over the next two years. Our upcoming key milestones include report updated fadraciclib Phase 1 safety and efficacy data with frequent IV dosing schedule in patients with advanced solid cancers; report initial safety and PK data from Phase 1 study of fadraciclib or formulation; treat first patient in fadraciclib Phase 1/2 precision medicine driven study; report initial data from fadraciclib venetoclax Phase 1 study in relapsed or refractory AML and CLL; report initial data from CYC140 Phase 1 first in-human study in relapsed or refractory leukemias; report initial data from sapacitabine venetoclax Phase 1 study in relapsed or refractory AML or MDS; and report data from Phase 1B/2 sapacitabine olaparib IST in BRCA-mutant metastatic breast cancer when reported by the investigators. With capital on hand estimated through the end of 2022, we have the resources to deliver key milestones in our clinical studies. I would now like to turn the call over to Paul to review our second quarter 2020 financials. Paul?