Spiro Rombotis
Analyst · ROTH Capital Partners
Okay. I apologize as I was disconnected. So thank you, Eric. And thank you everyone for joining us today for our third quarter 2020 business update call. As announced earlier, we estimate that our cash and equivalents of $23.1 million as of September 30, 2020, will provide a cash runway for current spending plans to the end of 2022. Before updating you on our programs, I have the pleasure of introducing you to Dr. Mark Kirschbaum, who joined us two weeks ago as Chief Medical Officer. He was most recently Vice President, Hematology Oncology at ArQule Inc., which was recently acquired by Merck, where he managed clinical development of their BTK inhibitor for hematological indications, including CLL. Prior to ArQule, he was Senior Medical Director with global clinical development responsibilities at three pharma companies, where he led clinical developments of novel inhibitors of EZH2, HSP-90, HER2 and BTK in various solid tumor and hematological malignancies. Before working at the biopharma industry, Mark gained extensive hematology and oncology experience in academic clinical practice as Professor of Medicine and Director of New Drug Development at several medical centers across the United States and Israel. Mark is completing a pipeline review before making his recommendations regarding optimal allocation of clinical resources and development plans. This is timely as recently reported fadraciclib data from ongoing Phase 1 studies continue to show both anti-tumor and anti-leukemia activity and also good oral bioavailability. Turning into our programs, we'll first review fadraciclib or fadra for short, our CDK2/9 inhibitor. Overall, fadra has demonstrated durable suppression of MCL1 and anticancer activity as monotherapy in heavily pre-treated patients with solid tumors. We have also observed antileukemic activity consistent with the drug's mechanism and as mentioned good tolerability. We believe these findings make fadra a leader in the race to bring to market medicines that work on this cancer pathway. Overexpression of cancer resistance proteins, such as MCL1 or amplification of oncoproteins, such as cyclin E and/or Myc are associated with scale and continued growth of cancer cells. MCL1 is a member of the BCL2 protein family, including BCL2, BFL1, Bcl-xL, et cetera. 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/uterine and ovarian. Addiction to cyclin E enables cancer cells to escape death after anticancer therapy. Suppressing these proteins forces aberrant cells into apoptosis, or programmed cell death. Cyclacel’s therapeutic strategy with fadra is to suppress the expression of such proteins and reactivate the apoptotic machinery leading to cancer cell death. A differentiating feature of fadra is that it targets both the CDK2 and CDK9 isoforms, which act as key components of the p53 pathway. Activity against CDK2 results in reduction of cyclin E and CDK9 in reduced expression levels of MCL1, MYC and other short-lived transcripts. Recent peer-reviewed publications in PLOS ONE and The Journal of Clinical Investigation by scientists from Cyclacel and the Institute of Cancer Research in London strengthened the mechanistic rationale for fadra's potential as an anticancer agent. In particular, they highlight the benefits of inhibiting both CDK2 and CDK9 and elucidate the roles of cyclin E, MCL1 and MYC overexpression in the development of cancer resistance. More recently, independent findings of synthetic lethal screening experiments from Duke University reported at the ASCO 2020 Virtual Scientific Program corroborated the attractiveness of this dual targeting approach against CDK2 and CDK9. Fadra was a subject of an oral presentation last month at the Plenary Session of the 32nd EORTC-NCI-AACR or ENA Symposium 2020. The presentation reported data from parts 2 and 3 over ongoing Phase 1 dose escalation study evaluating single-agent fadra in patients with advanced solid tumors. In the part 2, fadra is administered intravenously to 24 heavily pretreated patients with various advanced solid tumors. The study has reached the fourth dose level. In terms of overall efficacy to-date, one confirmed partial response or PR and four stable diseases or SD have been observed. Out of 11 patients treated at the fourth dose level, one achieved confirmed PR and two SD. The PR was observed after a month and a half on fadra in a patient with MCL1-amplified endometrial cancer who had failed seven lines of prior therapy. The patient remains on treatment after 16 months with 92% reduction in target tumor lesions. The two SD were observed in patients with cyclin E amplified ovarian cancer who achieved 29% shrinkage in target tumor lesions after two and a half months and a patient with fallopian tube adenocarcinoma with undetermined protein level respectively. In part 3, we enrolled five patients who were treated with an oral capsule formulation of fadra as a single-agent using the same dosing schedule as the intravenously administered part 2. Analysis of biospecimens from the first three evaluable patients showed high oral bioavailability and overlapping pharmacokinetics with part 2. Based on the findings, we plan to expand developments of oral fadra initially in solid tumors and later on in hematological malignancies. Let us now turn to our hematological malignancies program. We have opened two Phase 1 dose escalation studies to test the hypothesis that suppressing MCL1 and BCL2 can result in anticancer activity against relapsed or refractory leukemias, where therefore evaluating a fadra and venetoclax combination in patients with relapsed or refractory CLL in the 065-02 study and relapsed or refractory AML or MDS in the 065-03 study. The primary endpoint of each study is determination of recommended Phase 2 dose and safety. In CYC065-02, five patients with relapsed/refractory CLL have been treated in four dose levels after 150 milligrams per meter squared of IV fadraciclib in combination with oral venetoclax. Fadraciclib is administered after completion of venetoclax ramp. Anti-leukemia activity was observed in three patients who achieved MRD negativity on the combination, one in the bone marrow and two in bone marrow and peripheral blood. The latter two patients have also demonstrated continued shrinkage of lymph nodes on the combination. In one patient all target lesions and in the other two out of four lesions have shrunk below 1.5 centimeters. Both are waiting for confirmation of response. Preclinical data support a dual targeting strategy of both BCL2 and MCL1 in CLL. In CYC065-03, 14 heavily pretreated patients with relapsed or refractory AML were treated in five dose levels up to 200 milligrams per meter squared of IV fadraciclib in combination with venetoclax. Anti-leukemia activity has been observed in four out of 12 patients available for assessment. Preclinical data in AML suggest that targeting both MCL1 and BCL2 may be more beneficial than inhibiting either protein alone. 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 CYC140 and sapacitabine. In our anti-mitotic program, we're evaluating CYC140, a Polo-like or PLK1 inhibitor, which like fadraciclib was discovered in-house. Seven 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 has demonstrated potent and selective target inhibition and high activity in xenograft models of human cancers. In response to investigator demand, we are progressing our plans to study CYC140 in patients with solid tumors. In our DNA damage response program, 632-11, 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 therapies, 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 in combination of sapacitabine with olaparib, AstraZeneca's Lynparza, in patients with BRCA-mutant breast cancer. Seven patients have been enrolled with two partial responses and prolonged stable diseases observed. Turning to our other ISTs, we are collaborating with an international cooperative group to evaluate fadra in the aggressive childhood cancer neuroblastoma where MYC overexpression is prevalent. And we'll provide updates once the study is open for enrollment. During the quarter, we continued to move our programs forward to multiple data outcomes over the next two years. Our upcoming key milestones include treat first patient with orally administered fadraciclib in Phase 1/2 advanced solid tumor study: report initial data from fadraciclib venetoclax Phase 1 study in relapsed/refractory AML or MDS and CLL; report safety and PK data from Phase 1 study of fadraciclib oral formulation; report initial data from CYC140 Phase 1 first-in-human study in relapsed/refractory leukemias; and report initial data from sapacitabine-venetoclax Phase 1 study in relapsed/refractory AML or MDS. 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 [ph] quarter 2020 financials. Paul?