Raffaele Baffa
Analyst · Cantor Fitzgerald. Please state your question
Thank you, Heidi. Let me start by saying a few words regarding our progress in our pioneering TCR-T library program. As Heidi mentioned, we achieved another major milestone for our TCR-T library program by completing the commissioning of the cGMP clinical production unit or CPU as well as a aseptic process validation for the newly constructed TCR manufacturing facility in Houston. We remain on track to those patients in the Phase 1/2 dose finding study in the second half of 2021. We now anticipate that occurring during the fourth quarter. The trial is initially targeting six individual solid tumor indications, cholangiocarcinoma, pancreatic, ovarian, endometrial, colorectal and lung cancer, which were selected due to the frequency of KRAS and/or TP53 mutation. These are just initial tumor types as we plan to expand in traditional indication in the future. We continue to qualify additional TCRs in our library and plan to amend the IND in the second half of this year to include these TCRs. These expansion will increase the potential utility, applicable patient population and addressable commercial market for the library. It may include additional KRAS and/or TP53 mutations or other genetic hotspots associated with solid tumors, such as EGFR. We plan to provide updates on the library later this year. We know that there is an interest in our manufacturing strategy and capabilities. So let me say a word about this. We are disclosing today more details regarding the contract manufacturer for our TCR-T cell product. During 2020, we successfully transferred the manufacturing process to KBI Biopharm, a contract manufacturing organization with cGMP cell therapy manufacturing facility in The Woodlands in Texas. TCR-T batch data generated both KBI, in our own laboratory, were the basis for the CMC portion of our IND filing earlier this year. KBI is now working to complete the process qualification and aseptic process validation to facilitate clinical manufacturing. Additionally, as Heidi mentioned previously, we have been implementing a strategy to building in-house cGMP clinical production capabilities at our facility in Houston. We have done this to provide greater flexibility and control of these important aspects of clinical development. We are rapidly moving forward to establish our own manufacturing capabilities. The commissioning of our clinical production unit or CPU as well as aseptic process validation were completed this past quarter. The team is completing process qualification, which will support the opening of the facility to manufacture TCR-T cells for the clinical trial. The ability to use both our facility and KBIs for manufacturing provides us a strong degree of risk mitigation and greater capacity as we scale up clinical trial activities. I want to remind everyone why we are so confident in our TCR program. As you may recall, we shared exciting preclinical data earlier this year at the ACR Annual Meeting, where we presented a multiple TCR, could be stably expressed using Sleeping Beauty transposition to redirect peripheral blood T cells towards tumor. These TCRs have unique specificity, targeting recurrent TP53 and KRAS substitution in frequent HLA haplotypes. We plan on providing additional preclinical data further demonstrating the strong science behind the program later this year at a scientific conference. Based on ongoing dialogue with investigators, we are very optimistic that we will consistently find the types of hotspot mutation that actually matches with our library within the target patient population. This, along with the compelling body of preclinical data and progress on manufacturing, gives us a strong degree of confidence in the program. We expect to dose patients in the study during the fourth quarter, with initial readouts during the first half of 2022. As we said previously, those results may occur at scientific conferences, but we will provide updates as soon as we have meaningful data to share. Let me also provide a brief update on our investigational CD19 RPM CAR-T cell therapy program being conducted in Taiwan by Eden BioCell, our joint venture with TriArm Therapeutics. We have included more detail both in our press release and our 10-Q, which were filed earlier today. Since the trial initiation in March, two patients have been dosed and evaluated. No serious adverse safety events were reported in neither of these patients. Laboratory results continue to support as previously published. The nonviral Sleeping Beauty gene transfer is effective in genetically modifying the autologous T cells. Patients were infused two days after gene transfer, thus shortening the turnaround time and providing a clear advantage over viral method. Based on laboratory data for these first two patients, the Eden BioCell team, along with the lead investigator with the support from the team at Ziopharm, concluded that further process development work is required to optimize and refine the manufacturing process in order to more confidently manufacture products in the desired clinical dose range seeking to be studied. Per the terms of the joint venture agreement, the TriArm-Eden BioCell team, will attempt to make the necessary process development improvements before infusing additional patients. The length of time to do is unknown and may require up to 12 months. The ongoing COVID-19 outbreak in Taiwan presents added uncertainty to the time line as the operational activity in the manufacturing facility are currently slowed due to the employee restriction related to the pandemic. These restrictions are impacting clinical trials broadly in Taiwan. As we also mentioned in the press release and consistent with our strategic focus on TCR, the company is seeking and considering broader partnership to enable further development of the investigation of CD19 RPM CAR-T cell therapy. Several parties have expressed interest in such a partnership, including TriArm Therapeutics. The company will carefully consider all options regarding the future of the joint venture, the technology and the global development pathway in order to maximize shareholder value. It is important to note that the TCR and CAR-T processes are intrinsically different and have followed separate process development pathways. While both involve the Sleeping Beauty gene transfer, the contract manufacturing processes and target indications are distinct. Additionally, the TCR-T clinical program is investigating the treatment over a range of solid tumors, whereas the CAR-T program has been focused on hematologic malignancy. We do not believe that the finding from CAR-T read through to the TCR-T program. You can find additional details on our pipeline and milestones in the materials we shared earlier today. Let me conclude by reiterating what makes Ziopharm unique and why we are so excited? Slide 5 in the material is a greater presentation of what drives values for us: the right cells, the right target and the right platform. With that, I will now turn the call over to the operator, who will help us begin the QA. Operator?