Kristen Buck
Analyst · HC Wainwright
Thanks, James, and good afternoon, everyone. Lisata's development programs are based on sound scientific rationale from a vast body of published preclinical and early clinical works. These works include those, which led to Dr. Erkki Ruoslahti being awarded the Lasker prize for the fundamental discoveries that spawned our CendR platform technology. A product of the CendR platform certepetide is designed to address major impediments to the successful treatment of advanced solid tumors. This is especially relevant in an environment of increasing cancer prevalence and growing pharmacoeconomic pressures. Our clinical studies have been rigorously designed with the end in mind that is product registration and they're optimized to generate clinically meaningful unambiguous data. As such, unlike many similarly phased studies, our studies are placebo-controlled, appropriately sized and employ primary endpoints that are preferred by regulatory authorities in support of pivotal trials.
Further, our trials evaluate certepetide in combination with current standards of care to allow for clear discernment of treatment effect and to fit with current treatment practices at clinical sites. These strategic design choices are not always the least expensive approach, but they do afford us the most scientifically rigorous methodology by which to generate clinically meaningful data as efficiently and rapidly as possible. This is in keeping with our diluent mantra do the last experiment first to avoid the time and capital consumption on work that could become unnecessary. We have also devised and implemented a regulatory strategy that optimizes certepetide's regulatory review and future commercialization. This strategy includes obtaining special regulatory designations, priority reviews and accelerated approvals. I will speak more to the company's strategy in a moment. But as you can imagine, the aforementioned opportunities underpin why we are so excited about the initial top line results that we'll report at the end of the year from our large Phase 2b ASCEND trial.
However, before I get to the specifics of each of the clinical studies, allow me to provide some important background, especially for those who are listening to me for the first time. Despite advances in cancer therapy, including CAR-T cell therapy and immunotherapies, many solid tumors are still associated with poor outcomes for patients. Cancers, such as pancreatic cancer, gastric cancer, glioblastoma multiforme or brain cancer and other solid tumors are surrounded by a dense fibrotic tissue known as the stroma, which actually limits access of most pharmacotherapies to the tumor. In addition, many solid tumors also present with a hostile tumor microenvironment, or TME, which suppresses a patient's immune system and makes it less effective in fighting cancer.
The combination of the dense stroma and the hostile TME prevents many chemotherapies and immunotherapies from optimally being effective in treating these cancers. This, coupled with the fact that most anti-cancer therapies are not efficient in targeting only cancer tissue, defines the major challenge of maximizing effectiveness and safety in the treatment of solid tumors. However, to combat this, Lisata's approach is to exploit the CN rule to activate the Cend active transport system. It's a naturally occurring active transport system to selectively deliver anticancer drugs through the stroma and into the tumor.
Certepetide is a 9 amino acid cyclic peptide with high binding affinity and specificity for alpha v beta 3 and beta5 integrin receptors, which are significantly upregulated on tumor vascular endothelial cells and tumor cells but not healthy tissue. Once bound in these integrins, certepetide is cleaved by proteases naturally occurring in the tumor microenvironment. The proteases converts certepetide from a cyclic peptide into 2 linear peptides, one of which is a 5 amino acid CendR linear peptide fragment. Upon association of the CendR fragment from the integrin receptor, it binds to another receptor called neuropilin-1 on the same or nearby cell. Once neuropilin-1 is activated, it actuates the CendR-active transport mechanism, which is manifested by the formation of microvesicles at the surface of the cells. These microvesicles encapsulate moieties in the circulatory system, including any co-administered anticancer drugs, on [indiscernible] certepetide and CendR fragments and essentially ferries them through the stroma and vasculature into the tumor.
Certepetide's mechanism of action is agnostic to the modality of the companion anticancer drug with which it's administered, and it can be combined with a wide range of existing or emerging anticancer therapies, including chemotherapies, immunotherapies and RNA-based therapies. Additionally, as previously reported, certepetide has been shown in a range of preclinical models to modify the tumor microenvironment, making it less hostile to immune cells, reducing tumor resistance to anticancer medications and actually impeding into preventing the metastatic cascade. These results come from Lisata sponsored studies and from collaborators and research groups around the world and has been the subject of more than 350 scientific publications relevant to certepetide mechanism of action.
Along with our collaborators, we've also amassed significant nonclinical data, demonstrating enhanced delivery of a range of anticancer therapy modalities, including chemotherapies, immunotherapies, RNA-based therapeutics and even cell therapies. And to date, certepetide has demonstrated favorable clinical safety, tolerability and activity to enhance delivery of standard-of-care chemotherapy for patients with metastatic pancreatic cancer. As mentioned earlier, Lisata has worked diligently to optimize our regulatory strategy. The fruits of our labor can be seen in the number of special regulatory designations awarded to our product. For example, certepetide is the recipient of a fast track for designation by the FDA, which affords us more frequent interactions with the FDA and the ability to submit NDA components early for our rolling review. Certepetide will also be eligible for an accelerated approval and priority review if the relevant criteria are met.
Further, certepetide has received multiple orphan designations, including one for pancreatic cancer in both the U.S. and Europe as well as one for malignant glioma in the United States. Orphan designation affords Lisata exemption from user fees and provides extended market exclusivity. And since the start of 2024, certepetide has also received an orphan designation and a rare pediatric disease designation for osteosarcoma in the United States. Just for background, the FDA defines rare pediatric diseases as diseases with fewer than 200,000 cases in the United States that are serious or life-threatening and primarily affect individuals under 18 years of age. A substantial benefit of a rare pediatric disease designation is receipt of a priority review voucher, often referred to as the golden ticket once the FDA approves a new drug application or NDA for the product and indication having received the designation.
Vouchers are especially valuable as they can be used to compel a priority review of an additional NDA or biologic license application for another product or indication reducing the standard review time of approximately 10 months to 6 months. The voucher may be used by a sponsor or sold to another sponsor for their use. Priority review vouchers have sold for as much as USD 350 million historically and more recently, have sold for between $75 million and $100 million. Overall, our development strategy includes the pursuit of a rapid certepetide registration for the treatment of metastatic pancreatic ductal adenocarcinoma alongside studies, which further exploits certepetide's ability to enhance a variety of anticancer treatments in a range of solid tumors.
To this end, certepetide is currently the subject of nearly a dozen planned for active clinical trials globally for the treatment of various solid tumors. For example, the ASCEND trial, it's 158 patient double-blind, placebo-controlled randomized clinical trial, evaluating certepetide in combination with standard of care, gemcitabine and nab-paclitaxel chemotherapy in patients with metastatic pancreatic ductal adenocarcinoma, often known as mPDAC. The trial is being conducted at 25 sites in Australia and New Zealand, led by the Australasian Gastrointestinal Cancer Trials Group, or AGITG in collaboration with the NHMRC clinical trial center at the University of Sydney.
The study consists of 2 cohorts. Cohort A received a single dose of 3.2 milligram per kilogram certepetide, essentially simultaneously with standard of care, while Cohort B is identical to Cohort A, but with the second dose of 3.2 milligram per kilogram certepetide, given 4 hours after the first. As previously reported a positive outcome from the planned interim futility analysis in 2023 was announced by the study's independent Data Safety Monitoring Committee, which recommended continuation of the study without modification. With trial enrollment completed in the fourth quarter of 2023, we expect top line data from 95 patients assigned to Cohort A of the study to be reported in the fourth quarter of this year and the complete data set of all 158 patients from the study to be available by mid-25.
The prospect of positive data is encouraging, and we have begun planning the subsequent development steps. For example, we've already received an opinion from the Therapeutic Goods Administration, or TGA, which is the medicine and therapeutic goods regulatory agency of the Australian government that they believe positive data from Cohort A of ASCEND warrant submission of an application for provisional determination, the Australian version of a conditional approval. We expect similar discussions with FDA and EMA once the data are in hand. We have already anticipated and designed the required Phase 3 study that will be necessary to maintain the conditional approval and support a full registration once completed. The ASCEND data anticipated this year will further inform and optimize our proposed Phase 3 clinical program in mPDAC.
Next, the BOLSTER trial. The BOLSTER trial is our Phase 2a double-blind placebo-controlled multicenter randomized trial in the United States, evaluating certepetide in combination with standard of care in first-line cholangiocarcinoma. The BOLSTER trial was originally designed as a Phase 2, 3 arm basket trial, evaluating certepetide in combination with standards of care for second-line head and neck squamous cell carcinoma, second-line esophageal squamous cell carcinoma and first-line cholangiocarcinoma. During months of study planning and initiation activities for the head and neck and esophageal cohort, however, we deemed that these 2 arms were not feasible to recruit given challenges with country-specific access to consistent standard of care drugs and delays in adding these standard of care drugs to national formularies. Given these obstacles, the 2 arms were going to take much longer to complete and be significantly more costly than originally projected. As a result, we took the fiscally responsible but nevertheless, difficult decision to terminate these arms.
Following that action, we strategically refocused the trial on the first-line cholangiocarcinoma arm. As it relates to this, I'm actually delighted to report that Lisata's internal team has made significant enrollment progress to date that has far exceeded expectations. We expect to easily complete enrollment in first-line cholangiocarcinoma by the end of the year, if not substantially sooner. Also, the effectiveness of the sites involved in the first-line cholangiocarcinoma arm, along with the enthusiasm and efficiency of the corresponding investigators has prompted us to consider initiating a BOLSTER study amendment for patients requiring second-line treatment for their cholangiocarcinoma. To achieve this, we are in active discussions with the FDA and our investigator network and we'll provide more news on this in the coming weeks and months.
Next is the CENDIFOX study. It's a Phase 1b/2a open-label trial in the United States of certepetide in combination with neoadjuvant FOLFIRINOX based therapies in pancreatic, colon and appendiceal cancers, and it continues to make steady progress with enrollment completion for all 3 arms expected by the end of this year 2024. This trial will provide us with pre- and posttreatment biopsy immuno profiling data as well as long-term heart outcome data. Qilu Pharmaceutical, the license of certepetide in the Greater China territory is also currently evaluating certepetide in combination with gemcitabine and nab-paclitaxel as a treatment for mPDAC. During the 2023 ASCO Annual Meeting, Qilu Pharmaceutical presented an abstract sharing preliminary data from the trial, which corroborated previously reported findings from the Phase 1b/2a trial of certepetide plus gemcitabine and nab-paclitaxel conducted in Australia in patients with metastatic pancreatic cancer.
As recently announced, Qilu has begun treating patients in their Phase 2 placebo-controlled trial in mPDAC. The study is planned to take approximately 18 months to complete enrollment accrual and another 13 months for patient follow-up and data analysis and reporting. In collaboration with our funding partner, WARPNINE, the iLSTA trial is a Phase 1b/2a randomized, placebo-controlled, single-blind, single-center safety, early efficacy and pharmacodynamic trial in Australia. This 3 cohort study is evaluating certepetide in combination with the checkpoint inhibitor, durvalumab plus standard of care gemcitabine and nab-paclitaxel chemotherapy versus certepetide in combination with standard of care alone versus standard of care alone in patients with locally advanced nonresectable PDAC. Enrollment completion is expected in the second half of 2024.
iGoLSTA, a Phase 1b/2a proof-of-concept safety and efficacy study, evaluating certepetide in combination with nivolumab and FOLFIRINOX as a first-line treatment in locally advanced nonresectable gastroesophageal adenocarcinoma is pending initiation as a function of availability of funding by our partner, WARPNINE. The inspiration for this study comes from the findings recently published in oncology and cancer case reports Journal, which details a patient with metastatic gastroesophageal adenocarcinoma, who achieved a complete response when given certepetide in combination with standard of care FOLFIRINOX plus pembrolizumab. The subject initially underwent months of standard of care treatments and only achieved a partial response. Upon the subsequent addition of certepetide to the existing standard of care therapeutic regimen, the subject achieved a complete response confirmed both radiographically and surgically.
Remarkably and thankfully, the subject remains healthy since achieving the complete response in February of 2023. We hope to provide an update on timing related to the execution of the iGoLSTA study in the coming quarters. A study of certepetide in combination with temozolomide in glioblastoma multiform or GBM, has been initiated with several patients already enrolled and treated. This study is designed as a Phase 2a double-blind placebo-controlled randomized proof-of-concept study evaluating certepetide when added to standard of care temozolomide versus temozolomide alone and matching certepetide placebo in patients with newly diagnosed glioblastoma multiform. This actively enrolling study is being conducted across multiple sites in Estonia and Latvia and is targeted to enroll 30 patients with a randomization of 2:1 certepetide plus standard of care versus placebo plus standard of care.
On top of the previously described studies, we're exploring additional trials supporting our general development strategy. However, we remain steadfast in only starting trials that can be funded through to data and trials that can be executed within a reasonable period of time.
Finally, I would be remiss if I didn't remind you that several of the studies I mentioned are investigator-initiated trials. And although we have great confidence in our investigators running these studies, Lisata has limited control and thus, timelines and expectations may be subject to change. That said, we are extremely grateful to the investigators and especially to the patients participating in certepetide clinical trials around the world. For those who are more interested, a more comprehensive description of each trial is available in the appendix section of the corporate presentation on our website.
Additionally, in the body of the presentation, there are 2 slides that depict the anticipated timing and execution of key milestones and data readouts from our trials. As you will see, there are numerous execution and data milestones projected from our portfolio of clinical trials over the next year and beyond.
With that, I will now turn the call back to Dave.