Mark Kirschbaum
Analyst · ROTH MKM. Your line is open
Thank you, Spiro. We are pleased with the single-agent activity and molecular profile of oral fadra and the encouraging progress of oral plogo in our Phase 1 studies. Once the recommended Phase 2 dose is determined in the ongoing 065-101 study with oral fadra, we will immediately move into Phase 2 proof-of-concept stage, in which the primary objective is to assess activity and safety of the drug in relevant tumor types. At ENA 2022 and our R&D Day in October, we reported on the dose escalation part of the study. Fadra was well tolerated and escalated from dose levels 1 to 5, which is 100 milligrams twice daily, Monday through Friday for 4 weeks out of 4. Dose Level 5 is completed and can be considered safe. There have been no dose-limiting toxicities related to study drug. In dose levels up to 5, the only consistent side effect of the drug is nausea at manageable levels, typically grade 1 to 2. As per protocol, we escalated to dose level 6, which is 150 milligrams twice daily, Monday through Friday for 4 weeks out of 4. At that dose level, we observed 2 Grade 3 dose-limiting toxicities at dose level 6, hyperglycemia in 1 patient and nausea in a second patient. Both were reversible after holding drug. In accordance with the protocol, we have enrolled 3 of the planned 6 patients at dose level 6A, which is 125 milligrams twice daily, Monday through Friday for 4 weeks out of 4. At this stage of the study, we seek to optimize the dose and schedule and then commence the Phase 2 stage. As reported, we have seen anticancer activity in the dose escalation up to Level 5. 2 out of 3 patients with T-cell lymphoma achieved PR, including a patient with a very aggressive angioimmunoblastic form of peripheral T-cell lymphoma. 11 of 15 patients with cervical endometrial liver and ovarian cancer achieved stable disease with target lesion reductions as their best response. A pancreatic patient maintains stable disease for 5 cycles of treatment. These are promising responses for this earlier phase of clinical testing and may predict deeper responses in the Phase 2 stage. With regard to our second oral fadra study, 065-102, in patients with acute myeloid leukemia and myelodysplastic syndrome, we are enrolling patients at dose level 5, which is 100 milligrams twice daily, Monday through Friday for 4 weeks out of 4. We look forward to providing an update on the 065-102 trial during the year. Let’s now turn to our second program with plogosertib, our oral PLK1 inhibitor. We have reported initial encouraging results from 140-101 our Phase 1/2 study of plogo in patients with advanced solid tumors and lymphoma. This study is currently enrolling in dose level 4, which is 15 milligrams once a day, Monday through Friday for weeks 1 and 3. This is a first-in-human study for oral plogo. And as is traditional, we have started at lower doses. We were, therefore, pleasantly surprised at this early stage of the study to observe stable disease at dose level 1 in two patients with non-small cell lung cancer for eight cycles and ovarian cancer for five cycles, respectively; and a dose level 2 in a patient with biliary tract cancer for three cycles. Published preclinical evidence suggests that low dose continuous administration may be an effective strategy for PLK1 inhibitors, as well as the more documented higher dose pulse type strategy. This is particularly true for plogo given that it has a favorable PLK inhibitory profile and a shorter half-life, thus potentially minimizing toxicities. Our ongoing Phase 1/2 trial of plogo is designed to target several important tumor types, where the drug may show broad single-agent activity. This was observed across multiple preclinical models, and in particular, colon cancer, lymphoma and small cell lung cancer. Our study efficiently evaluates both dose and schedule so as to optimize the recommended Phase 2 dose for the proof-of-concept or cohort stage of the study. I will now turn the call over to Paul to review our fourth quarter and full year financial results.