Corinne Le Goff
Analyst · HC Wainwright. Please go ahead
Thank you, Kim, and good morning, everyone. Joining me today is Jeffrey Church, our Chief Financial Officer. In addition, Dr. Khursheed Anwer, our Chief Science Officer, will be available during the Q&A session at the end of our prepared remarks. Imunon's growth and development is dependent on four pillars. Last quarter, I spent the bulk of our time on the development of our PlaCCine prophylactic vaccines modality as an out-licensing and partnership opportunity. While I will certainly update you on this modality and we did have some interesting developments, first, I'd like to highlight IMNN-001 or DNA-based Interleukin 12 immunotherapy for the localized first line treatment of advanced ovarian cancer in combination with a standard-of-care chemotherapy, and it's currently in Phase II clinical development. Recall that in September 2022, we reached full enrollment of 110 patients and this year, in September 2023, we reported an additional set of interim, more mature data, showing promising progression free survival and overall survival data. In the intent-to-treat population, we demonstrated a delay in disease progression in the treatment arm of approximately 33% or more than three months benefit and preliminary overall survival data followed a similar trend showing an approximate nine month improvement in the treatment arm over the control arm. [Indiscernible] ratio of 0.78 approaches the critical defined value of 0.75 set at an 80% confidence interval for the ITT population. Since OVATION 2 is an exploratory study with totals of control plus study arms of only 110 patients, it was not powered to a P inferior to 0.05 and the current trends looks promising. Recall that this study is evaluating the dosing, safety, efficacy and biological activity of intraperitoneal IMNN-001 in combination with neoadjuvant chemotherapy or NACT and this in patients newly diagnosed with advanced epithelial, ovarian, fallopian tube or primary peritoneal cancer. NACT is designed to shrink the tumors as much as possible for optimal surgical removal after three cycles of chemotherapy and following NACT patients undergo interval debulking surgery, followed by three additional cycles of chemotherapy to treat any residual tumor. IMNN-001 is administered weekly during the course of NACT. So we also reported for the first time data on new subset of patients treated with PARP inhibitors. When we began the OVATION 2 Phase II trial the PARP inhibitors were not part of the first-line maintenance treatment in ovarian cancer. Now they form an important part of the patient's treatment plan. A simple analysis of patients who received IMNN-001 and post-chemo maintenance therapy with PARP inhibitors versus PARP inhibitors alone in the control group shows positive impacts. The median PFS in the PARP inhibitor plus NACT group was 15.7 months yet PFS in the PARP inhibitors plus NACT plus IMNN-001 group was 23.7 months or eight months longer. In addition, the median OS in the PARP inhibitors plus NACT group was 14.6 months and median OS, overall survival, has not yet been reached in the PARP inhibitor plus NACT plus IMNN-001 group. So although these data are from a small number of patients, they are intriguing. We also saw continued benefits in secondary endpoints including a 20% higher R0 tumor resection score and a doubling of CRS 3 chemotherapy response score to approximately 30% in the treatment arm, versus 14% in the control arm. A complete tumor resection or R0 is a microscopically margin-negative resection in which no gross or microscopic tumor remains in the tumor bed. Chemotherapy response score is considered a good prognostic indicator in ovarian cancer, so that's why those endpoints are important to look at. And safety analyses continue to show good tolerability of IMNN-001 in this setting. Now enrollment in our second Phase II study which, if you remember, is done in collaboration with Break Through Cancer Foundation has begun with the first patient treated at MD Anderson Cancer Center last month. The study is evaluating IMNN-001 in combination with Bevacizumab. All-in, the study is expected to enroll 50 patients with Stage III/IV ovarian cancer at several sites, including Memorial Sloan Kettering and Daner-Farber. The trials primary endpoint is depiction of minimal residual disease or MRD by second look laparoscopy, and the secondary endpoint is PFS. Initial second look laparoscopy data are expected within a year following the completion of enrollment and final PFS data are expected approximately three years following enrollment completion. This trial will include a wealth of translational endpoints aimed at understanding the clonal evolution and immunogenomic features of the MRD phase of ovarian cancer that is currently undetectable by imaging or tumor markers. We will keep you updated as sites are added and, as a reminder, much of this trial is being funded by Break Through Cancer. So we are now six to seven months away from seeing the final readout data of OVATION 2 program and this is an incredibly exciting time for Imunon. If positive, this data would be transformational to the field and which confirm how process of IL-12 being a potent immunomodulator for cold solid tumors. We will consult with the FDA on the potential regulatory path forward. Our small Phase II is showing promising trends in the ITT population and a strong benefit to standard maintenance PARP inhibitors therapy, which could inform registration study. PARP inhibitors are known to significantly increase PFS, but the improvement in overall survival is not yet established and resistance to PARP inhibitor therapy is a concern, which warrants novel combination approaches, such as with the immune agent IMNN-001. Let's now turn to PlaCCine, our proprietary mono-valent or multi-valent DNA vaccines based on a DNA Plasmid that controls the expression of pathogen antigens, and a non-viral synthetic DNA delivery system. PlaCCine is currently being evaluated for the development of next generation vaccines, or as we call them the vaccines of the future. We continue to bolster our preclinical data set with PlaCCine, which suggests this asset has been de-risked and is performing as anticipated. Our first PlaCCine product is IMNN-001, which is in final stages of preparation for an IND, Investigational New Drug application to the FDA. IMNN-001, which we view as a proof-of-concept, is designed to protect against [Indiscernible] Omicron XBB1.5 variant, in accordance with the FDA Vaccines and Related Biological Products Advisory Committee, to the VRBPAC committee announcement that has been made in June 2023 and that established a framework for updated COVID-19 doses. Imunon is targeting the first quarter of 2024 for submitting the IND and then enrolling the first subject in a Phase I trial in April 2024 with rapid advancements into Phase II trial by mid-2024. So, we are excited about the body of preclinical data and we have been active in presenting this data at various conferences, both in the US and Europe. For example, last month, Dr. Anwer, presented at the third International Vaccines Congress, highlighting immunogenicity data and the development status of IMNN-001. Dr. Anwer presentation described the multiple advantages of PlaCCine over current commercial vaccine platforms, including multivariable antigen expression and T-cell responses versus protein and mRNA vaccines. In addition, preclinical studies show that PlaCCine elicits better antibody response kinetic following a single dose, and demonstrate better shelf life of at least 12 months at four degrees Celsius and at least two weeks at very high temperatures of 37 degrees Celsius. These characteristics suggest superior commercial handling and distribution properties compared with mRNA vaccines, as well as greater manufacturing flexibility. Compared with viral or other DNA vaccines, or protein vaccines, PlaCCine vaccines habitantes in T-cell responses, safety, compliance and manufacturing flexibility. Dr. Anwer’s presentation also describes the versatility of the PlaCCine modality demonstrating activity against Marburg and influenza viruses in collaboration with The Wistar Institute and activity against Lassa virus, which is being evaluated at the NIH/NIAID. I remind you that during the third quarter, we entered into a cooperative research and development agreement with NIAID. This is a three-year agreement under which the NIAID will evaluate the immunogenicity and efficacy of two Imunon DNA-based Lassa virus vaccine candidate. The agency will assess the efficacy of PlaCCine DNA constructs against Lassa virus in guinea pig and non-human primate disease models, including both prime and prime-boost vaccine strategies. We also announced our collaboration with Wistar in January of this year and The Wistar Institute’s Vaccine & Immunotherapy Center is uniquely positioned to advance new vaccine formulations to facilitate further expansion and development of vaccine. Collaborate with outside partners, particularly those that will provide some or all of the funding or the reserves are a key pillar of our growth strategy. Now later today, Jean Boyer, our Vice President of Research and Development, will be presenting at the Vaccines Summit in Boston. Dr. Boyer’s presentation describes preclinical T-cell responses and notes that the induced immune response in vaccinated mice were persistent without decay for up to 14 months after vaccination. So as you might think, we are very pleased with the duration of response. So we believe that our PlaCCine modality is revealing itself as an important potential option in addressing not only pandemic response but also assist the seasonal vaccine option. Its stability at regular refrigerator temperatures of 12 months, room temperature stability over at least one month, and stability at high temperatures for at least two weeks plus the immune response duration and the plug-and-play model, using the Plasmid DNA backbone, has shown excellent pre-clinical results that are so important to a commercial vaccine product. And this is particularly important as many pathogens, such as Lassa virus may arise in geographies where there are challenges with refrigeration, storage and distribution networks. In addition, our ability to rapidly switch out antigens and load multiple antigens into the same vaccine should be instrumental in addressing the spread of disease. So in addition, our Plasmid modality uses a DNA Plasmid and a non-virus synthetic DNA technology for the expression of pathogen antigens. And our DNA-based vaccines can be administered using a standard syringe and IM injection and are independent of viruses or specialized devices for delivery like a corporation [Phonetic]. Last quarter, I touched on our work to develop two more modalities as logical extensions of our prophylactic vaccine modality. FixPlas concerns the application of our DNA technology to produce universal cancer vaccines, also called tumor-associated antigen cancer vaccines. We have initiated preclinical work to develop a Trp2 and NY-ESO-1 tumor-associated antigen cancer vaccine in melanoma, which we call IMNN-201. This work is in a very early stage and I look forward to updating you as it progresses. We are also in early discovery of our fourth modality IndiPlas for personalized neo-antigen cancer vaccines. And we plan to enter into new collaborations that focus on developing AI-powered computational approaches, and state-of-the-art cell sequencing technologies to identify tumor antigens in patient samples, and create the next generation of personalized cancer vaccines. And as with FixPlas, we will update you as our development work progresses. Importantly, recall that we manufacture our vaccines at our own cGMP facility in Alabama and our decision to manufacture in-house offers us many strategic benefits, but notably, the controls on cost, quality and timelines. So now I will turn the call over to Jeff Church who will discuss our financial results. Then I'll come back and provide a review of upcoming milestones and activities. Jeff?