Mark Kirschbaum
Analyst · Ladenburg
Thank you Spiro. As Spiro mentioned we are very pleased with the single-agent activity we are seeing with fadra and the encouraging progress of 140 in our Phase 1 studies. Let me briefly review the ongoing 065-101 Phase 1/2 study with oral fadra the primary objective of the study is the termination of recommended Phase 2 dose or RP2D and safety. Once RP2D is determined and the study is designed to immediately move into Phase 2 or proof-of-concept stage in which activity of the drug in relevant tumor types will be the primary objective. The Phase 1 part will determine whether fadra is tolerated with the objective of choosing an optimal dosing schedule. Patients recruited into the stage generally have advanced disease and are no longer responding to standard treatments. They are thus referred to specialized Phase 1 centers such as the ones participating in our study which are among the top Phase 1 sites in the world. It is difficult to treat Phase 1 population; it has been exciting to see early indications of broad anticancer activity. Two out of three patients with T-cell lymphoma achieved partial response or PR including a patient with a very aggressive angioimmunoblastic form of T-cell lymphoma. 11 of 15 patients with cervical, endometrial, liver, ovarian cancer achieved stable disease with target lesion reductions as their best response. A pancreatic patient maintains stable disease for five cycles of treatment. These are promising responses to this phase of development and predict deeper responses in the Phase 2 study where subjects will be treated earlier in the course of their illness. We are pleased to report that fadra is well tolerated thus far and that we are able to escalate quickly from dose of one to five which is 100 milligrams BID Monday through Friday for four weeks out of four. This 100-milligram twice daily dose on the four-week schedule is completed and can be considered safe. Based on data collected from completed dose levels including dose level five there have been no dose-limiting toxicities related to study drug. Overall, we see primarily nausea at a manageable level as the only consistent side effect of the drug. We have also reported at ENA 2022 results from pharmacokinetic studies and preliminary results of molecular correlative studies from patients in 065-101. The plasma concentrations of fadraciclib are dose proportional and cross the target engagement threshold levels of CDK2 and CDK9 at the higher dose levels four and five for approximately five to seven hours per dose on continuous dosing. Because the fadra is dosed twice daily so we achieved good coverage of the targets per day. Correlative molecular studies such as RNA seek while still preliminary show results consistent with the predicted activity of the drug. As we are near the end of the dose escalation part of the trial, we expect to identify RP2D and initiate Phase 2 proof of concept in early 2023 to evaluate tumors of interest. Tumor types believes to be sensitive to the activity of fadra including breast, colorectal, endometrial, hepatobiliary, ovarian, uterine cancer and lymphoma. 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 four, which is 100 milligrams BID Monday -Friday on weeks one through three on a 28-day cycle. We look forward to providing an update on the 065-102 trial in 2023. At our recent R&D Day, we also reported initial encouraging results from 140-101, our Phase 1/2 study of 140 in oral PLK1 inhibitor. The 140-101 study is currently enrolled in six patients with advanced solid tumors and lymphoma at dose levels one and two. As this is a first in human study for oral 140, as is traditional, we have started at lower doses. We were therefore, are pleasantly surprised in this early stage in the study to observe stable disease at dose level one and two patients, one with metastatic non-small cell lung cancer for six cycles and one metastatic ovarian cancer, who went through five 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 140, given that it has a favorable PLK inhibitory profile and the shorter half-life thus potentially minimizing toxicity as well as low nanomolar level inhibition of BRD4. Now BRD4 is a central epigenetic target, which plays an important role in the regulation of many oncogenes involved in the cancer process. Our ongoing Phase 1/2 trial of 140 is designed to target several important tumor types where the drug's activity may show broad single-agent activity. This was observed across multiple preclinical models including breast, esophageal, gastric, non-small cell lung, ovarian and squamous cell carcinoma. Our study efficiently evaluates both dose and schedule so that the best dose and schedule can be chosen for the efficacy or cohort stage of the study in these tumor types. I will now turn the call over to Paul to review our third quarter financial results.