Peter Hoang
Analyst · Piper Jaffray. Please state your question
Thank you, Tony. Good afternoon, everyone and thanks for joining us. We continue to make good progress advancing our MultiTAA T-cell therapies across various hematologic and solid tumor cancers in the quarter. In ongoing partner-sponsored clinical studies with MultiTAA T-cell at Baylor College of Medicine, patients are experiencing durable responses some over five years with virtually no meaningful treatment related toxicities. And while it’s early days, we’re encouraged by the promising results delivered by the novel T-cell immunotherapy, particularly in such challenging disease areas. In anticipation and support of future Marker-sponsored clinical trials, we continue to build-out our infrastructure and expand our team. We anticipate the next 12 months to 18 months to be an exciting and productive time for our company. As you may recall, based on the breadth of data collected across the Baylor-sponsored studies, we’ve selected acute myeloid leukemia or AML as our lead indication for our first company-sponsored clinical trial. We’ve recently filed a new investigational new drug application or IND with the USFDA as part of a planned Marker Phase 2 study in post-allogeneic hematopoietic stem cell transplant patients with AML in both the adjuvant and active disease settings. Upon reviewing our submission, the FDA requested additional information regarding certain quality and technical specifications for two reagents supplied by third-party vendors that are used in our manufacturing process. These reagents are ancillary products used in manufacturing and are not present in the final product. However, because the data are needed to clear the IND, the trial has been placed on hold until our complete response to the technical questions is being satisfactory to the FDA. Because the agency’s questions were directed to third-party products rather than our own process or product we worked with the regulatory and quality groups at the respective manufacturers to address the FDA’s request. After receiving the required information from them, we submitted our complete response for the agency in late October, and regulators have 30 days to respond. We will communicate and update and our plans to move forward once these questions have been addressed. Given the various resolution scenarios, we are confident that we can initiate the trial in 2020 and hope to provide more precise timelines later this year. We recognize the need for new improved therapies in AML and advancing our novel T-cell candidate, which we believe can have a significant impact on the treatment of this patient population, remains our top priority. In fact, AML is the most common acute leukemia in adults and progresses rapidly with our treatment. The prognosis for these patients is poor with a five-year survival rate of 28%, and a high risk of relapse necessitating the need for improved treatments. Current options are mostly limited to chemotherapy, sometimes in combination with a bone marrow transplant. Both treatments carry a risk of bleeding, life-threatening infections, and permanent infertility. Bone marrow transplants also carry risk of graft versus host disease, also known as GVHD. We believe that our MultiTAA therapy may have several advantages over standard approaches as well as other T-cell therapies in development. In contrast to mono-specific T-cells, MultiTAA T-cells recognize up to five antigens and allow for epitope spreading leading to a more potent durable anti-tumor response, and unlike transplants that require hospital stays, MultiTAA is administered in an outpatient setting. MultiTAA based cell therapy is our central focus, but we are also advancing several legacy vaccine-based programs. To date, clinical results in our breast cancer trials have showed continuing progress including based on a preliminary analysis of 34 patients enrolled in the triple-negative breast cancer trial to date, 31 have showed meaningful immune responses to vaccine treatment of 80 patients treated at 11 clinical sites, 14 have shown disease progression as of September 30, 2019, following treatment with TPIV 200. We have however, made the decision to discontinue the development of cancer vaccine in patients with platinum-sensitive advanced ovarian cancer based on an unblinded review of interim results from our Phase 2 study conducted by an independent Data and Safety Monitoring Board or DSMB. Although the DSMB did not express any safety concerns with respect to TPIV200, we have elected to suspend the trial as it did not meet our threshold for probability of success based upon our pre-specified criteria. Pending full review of the data, we anticipate closing the trial in the first quarter of 2020. Unlike the ovarian cancer trial, there is no formal interim analysis in the breast cancer trial. The last patient will complete the trial in Q2 2021; at which time, we will communicate the results and make a decision on next steps for that product. With that, I will turn the call over to Tony to review financials. After that, we look forward to taking your questions.