Moderna Announces an Array of Clinical Advances and Outlines 2018 Priorities; 19 Development Candidates, including 10 Clinical Programs, Highlight Productivity of mRNA Platform

On January 8, 2018 Moderna Therapeutics, a clinical stage biotechnology company that is pioneering messenger RNA (mRNA) therapeutics and vaccines to create a new generation of transformative medicines for high unmet medical needs in patients, reported important advances in its mRNA development pipeline, demonstrating the increasing productivity of its platform, including its first mRNA program to enter phase 2, new infectious disease vaccine and oncology programs entered into Phase 1 clinical studies, and the ongoing expansion of its pipeline with several new development candidates (DCs) (Press release, Moderna Therapeutics, JAN 8, 2018, View Source [SID1234523026]). A leader in mRNA science and development, Moderna continues to make notable progress across its broad, diverse pipeline, which now includes 19 mRNA drug candidates spanning infectious diseases, immuno-oncology, rare diseases and cardiovascular diseases.

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Moderna’s Chief Executive Officer Stéphane Bancel detailed company strategy and progress today at the 36th Annual J.P. Morgan Healthcare Conference in San Francisco.

The company reported several new advances including:

A Phase 2a study of mRNA AZD8601, a localized mRNA therapeutic encoding for vascular endothelial growth factor, VEGF-A, being developed in partnership with AstraZeneca. Information on the clinical study, including design and target indication, will be detailed in the coming weeks. Led by AstraZeneca, this will be Moderna’s first phase 2 study.

A new development candidate, mRNA-3927, for a rare disease within the liver modality. mRNA-3927 directs liver expression of a deficient enzyme in patients with propionic acidemia (PA), a serious and potentially life-threatening rare disease, which is part of a family of disorders known as organic acidemias. There are no approved therapies or ongoing clinical trials for PA. In September, Moderna announced its first rare disease DC, mRNA-3704, to treat methylmalonic acidemia, or MMA, another serious and often deadly organic acidemia.

The filing of an investigational new drug (IND) application for mRNA-5671, a KRAS cancer vaccine. KRAS is one of the most frequently mutated oncogenes in human cancer (approximately 30 percent of all cases). mRNA-5671 encodes for the four most commonly found KRAS mutations, which will cover most of the mutations that occur in non-small cell lung cancer, colorectal cancer and pancreatic cancer.

The initiation of two phase 1 prophylactic vaccine studies for mRNA-1647, a cytomegalovirus (CMV) vaccine, and mRNA-1653, a human metapneumovirus and parainfluenza virus type 3 (HMPV+PIV3) combination vaccine. CMV is the most common cause of newborn disability and the most frequent viral disease in transplant recipients, often leading to transplant failure. mRNA-1647 is made of 6 mRNAs, one coding for the herpesvirus glycoprotein (gB) antigen and 5 coding for the pentamer. HMPV and PIV3 are the second and third most common causes, respectively, of lower respiratory hospitalizations in children, behind respiratory syncytial virus (RSV). Currently, there are no approved vaccines for CMV, HMPV or PIV3.

A new development candidate, mRNA-1944, which directs liver expression of an antibody that can potentially neutralize chikungunya virus circulating in the blood. Moderna has a Phase 1 study underway for a prophylactic vaccine, mRNA-1388, to prevent infection from the chikungunya virus. An antibody approach would be more desirable in certain settings, such as in immuno-compromised populations, when rapid post-exposure treatment or prophylaxis is warranted, or when protection is needed only for short periods of time. This program is sponsored by DARPA.

"We are proud of the progress we have made over the past year as we continue to see real development pipeline momentum and productivity from our platform, and continue to deliver to the clinic important advances in mRNA science. We have achieved critical milestones in R&D, having gone from four clinical programs at the beginning of the year to now having 10 medicines in human testing, and our intention is to continue to rapidly advance our pipeline with an array of new development programs," said Bancel. "2016 was the year of mRNA vaccines in the clinic. 2017 was the year of several mRNA therapeutics in the clinic. In 2018, we will continue to evolve our pipeline of mRNA therapeutics, specifically focusing on discovering new rare disease drug candidates, while remaining committed to advancing new vaccine development candidates to address serious unmet needs. We also will continue to work toward a summer 2018 opening and rolling scale-up of our GMP clinical mRNA manufacturing facility, which is a cornerstone of our long-term strategy to move multiple development programs simultaneously into and through phase 1, phase 2, and phase 3 clinical studies."

As of today, nearly 700 subjects have been dosed across Moderna’s internally developed and partnered clinical programs with AstraZeneca and Merck. Moderna’s full pipeline can be found here.

2018 Strategic Priorities
During today’s presentation, Mr. Bancel outlined Moderna’s key strategic priorities for 2018 which include:

Effective execution of the development pipeline by continuing to advance programs through clinical study and by moving additional development programs into the clinic;

Emphasis on the discovery of new rare disease development candidates and new prophylactic vaccines to address high unmet medical needs;

Continued investment in the evolution of the company’s mRNA platform, including exploring new modalities to expand the application of its technology in new therapeutic areas;

Completion of construction of the company’s 200,000 square foot GMP mRNA clinical manufacturing facility in Norwood, Mass., with an anticipated opening in the summer of 2018 and subsequent rolling scale-up of the facility.

Detailed Q4 2017 Clinical and Development Program Updates
Moderna’s pipeline spans five modalities: prophylactic vaccines, therapeutic vaccines, intratumoral immuno-oncology therapeutics, localized therapeutics and liver therapeutics. Following are advances from across modalities since the company’s September business update:

Commercial Prophylactic Vaccines

Initiation of Phase 1 study of mRNA-1647, a cytomegalovirus (CMV) vaccine: The Phase 1, placebo-controlled multi-center study of mRNA-1647 began dosing patients in November 2017, and will assess safety, tolerability and immunogenicity. [clinicaltrials.gov listing]. A complex vaccine, mRNA-1647 consists of six mRNAs, including five proteins (gH, gL, UL128, UL130 and UL131A) designed to express the pentamer complex, and another CMV antigen, the herpesvirus glycoprotein (gB) protein. CMV is the most common cause of newborn disability, leading to deafness, microcephaly (small, not fully developed heads and severe disabilities), vision loss and mental deficiencies, among other serious complications. It is also the most frequent viral disease in transplant recipients, often leading to transplant failure. Currently, there is no approved vaccine for CMV.

Initiation of Phase 1 study of mRNA-1653, a combination human metapneumovirus and parainfluenza virus type 3 (HMPV+PIV3) vaccine: The placebo-controlled, multi-site Phase 1 study of mRNA-1653 began dosing patients in December 2017 and will assess for safety, tolerability, and immunogenicity. HMPV and PIV3 typically cause mild respiratory illness, but can become severe in young children, the elderly and other immunocompromised adults. HMPV and PIV3 are the second and third most common causes, respectively, of lower respiratory hospitalizations in children, behind RSV. Currently, there is no approved vaccine for either HMPV or PIV3.

Publications: in September, Moderna announced a publication in the August issue of Molecular Therapy that provides mechanistic insights about its mRNA prophylactic vaccines. The research, led by Professor Karin Loré, Ph.D., and her group at the Karolinska Institutet in Stockholm, Sweden, characterizes how Moderna’s vaccines target key antigen-presenting cells, leading to both B cell and T cell activation, which yields a potent immune response. Two additional papers based on Dr. Lore’s work offer additional insights into the method of action of Moderna’s vaccine technology. A paper published in November 2017 in Frontiers in Immunology demonstrates that Moderna vaccine technology is able to stimulate a type of B cell that makes high-quality, antigen-specific antibodies consistent with high seroconversion rates in humans. A second paper published in November in the Journal of Immunology, shows that Moderna’s vaccine technology produces a desirable kinetic immune activation and subsequent suppression by myeloid derived suppressor cells (MDSCs), which are major regulators of T- cell responses.

Moderna also continues to advance vaccines in collaboration with government agencies and non-government organizations to address major public health issues. The company is furthering its efforts through its current contract with the Biomedical Advanced Research and Development Agency (BARDA) – part of the Office of the Assistant Secretary for Preparedness and Response at the U.S. Department of Health and Human Services – to develop an mRNA Zika vaccine, now including a head-to-head comparison of two potential mRNA candidates (mRNA 1325 and mRNA 1893) through Phase 1, after which it will determine the best candidate for further clinical development to BLA submission for licensure.

Therapeutic Vaccines

Initiation of Phase 1 study of personalized cancer vaccine (PCV), mRNA-4157 (KEYNOTE-603): In November, Moderna announced that it has initiated dosing for a Phase 1 study of its PCV. The Phase 1 open-label, dose escalation, multicenter study in the United States will assess the safety, tolerability and immunogenicity of mRNA-4157 alone in subjects with resected solid tumors and in combination with KEYTRUDA (pembrolizumab), an anti-PD-1 therapy, marketed by Merck (known as MSD outside the U.S. and Canada) in subjects with unresectable solid tumors. Moderna has a strategic collaboration with Merck to develop PCVs in collaboration with KEYTRUDA. Moderna first identifies neoepitopes present in a patient’s tumor and then creates an mRNA-based PCV encoding for approximately 20 neoepitopes. When injected into the patient, the mRNA-based PCV directs the patient’s cells to express the selected neoepitopes. In turn, this may help the patient’s immune system better recognize cancer cells as foreign and eradicate them. mRNA-4157 also has the potential to enhance clinical outcomes associated with checkpoint inhibitor therapies. Leveraging its rapid cycle time, small-batch manufacturing technique and digital infrastructure, Moderna plans to manufacture and supply each individually tailored and manufactured PCV to patients within weeks.

Investigational new drug (IND) application filed for mRNA-5671, a KRAS cancer vaccine: KRAS is one of the most frequently mutated oncogenes in human cancer (approximately 30% of all cases). KRAS mutations are found principally in non-small cell lung cancer (NSCLC), colorectal cancer and pancreatic cancer, and are associated with worse outcomes. Hotspots of KRAS mutations are found in different tumor types and can serve as tumor rejection epitopes. Presentation of these epitopes to the immune system may elicit a robust anti-tumor response. mRNA-5671 encodes for the four most commonly found KRAS mutations, which will cover most of the mutations that occur in NSCLC, colorectal cancer and pancreatic cancer.

National Cancer Institute (NCI) to study mRNA-based PCV: In collaboration with Moderna, the Surgery Branch of the NCI’s Center for Cancer Research plans to sponsor a Phase 1/2 study to investigate the safety and immunogenicity of mRNA-based PCVs for patients under the direction of Steven A. Rosenberg, M.D., Ph.D., Chief of Surgery, NCI. As part of this collaboration, Moderna will manufacture mRNA-based personalized cancer vaccines (NCI-4650) for up to 12 patients with advanced-stage, metastatic cancers.
Localized Therapeutics

Phase 2a study of mRNA AZD-8601: Phase 2a study of mRNA AZD8601: Dosing of patients is anticipated for early in the first quarter of 2018 for the Phase 2a study of mRNA AZD8601, a localized mRNA therapeutic encoding for vascular endothelial growth factor, VEGF-A. The mRNA AZD8601 program is led by AstraZeneca. Data from a Phase 1 randomized, double-blind, placebo-controlled, single ascending dose study that assessed the safety, tolerability and pharmacokinetics (PK) of mRNA AZD8601 after single dose administration in male patients with Type 2 diabetes mellitus are expected to be presented at a scientific congress and published in 2018.
Liver Therapeutics

Naming of pre-clinical development candidate mRNA-3927, encoding an intracellular enzyme to treat Propionic Acidemia (PA): PA is a rare, autosomal recessive organic acidemia/aciduria caused by a mitochondrial enzyme deficiency in propionyl-CoA carboxylase (PCC) due to mutations in PCCA (PA type I) or PCCB (PA type II). mRNA-3927 combines mRNA-encoded proteins for both the PCCA and PCCB enzyme components with the goal of addressing all PA subtypes. PA is a natural follow-on to the MMA program, as both are organic acidemias with defective enzymes along the same metabolic pathway. PA is a rare disease with no approved therapy. The disorder typically impacts newborn children, and patients with PA often present acutely with metabolic acidosis, cardiac arrhythmias and hyperammonemia causing severe central nervous system dysfunction.

Naming of pre-clinical development candidate mRNA-1944, encoding an antibody against the chikungunya virus: mRNA-1944 encodes for an antibody that can neutralize the chikungunya virus circulating in the blood. Moderna has a Phase 1 study underway for a prophylactic mRNA vaccine (mRNA-1388) to prevent infection from chikungunya virus. However, in certain situations, such as in immuno-compromised populations, when rapid post-exposure treatment or prophylaxis is warranted, or when protection is needed only for short periods (three to six months), an antibody approach is desirable. Chikungunya typically causes mild fever and transient joint pain. In approximately 15 percent of infected patients, it can cause long-term, severe arthritis. Chikungunya historically has been limited to warmer climates in Asia and Africa, but recent cases have been identified in the Americas and Europe. There is no approved vaccine or treatment for chikungunya.

Collaboration for mRNA AZD-7970, encoding the secreted protein relaxin to treat heart failure: In November, Moderna and AstraZeneca announced a new strategic agreement to co-develop and co-commercialize mRNA AZD-7970, which is designed to instruct cells in the body to produce and express relaxin, a secreted protein with systemic effect. Heart failure occurs when the heart is weakened and cannot pump enough blood to meet the body’s needs. Biologic functions for relaxin suggest that expression of the hormone may directly impact underlying conditions that exacerbate heart failure, leading to the regrowth of heart tissue, controlling inflammation, reordering the extracellular matrix, improving renal function, and relieving hepatic portal pressure.

Publications: In December, Moderna announced the publication of preclinical data supporting its first rare disease development program, mRNA-3704, a therapeutic for methylmalonic acidemia (MMA), a serious and often life-threatening organic acidemia disorder. The data, published in the journal Cell Reports, demonstrate that intravenous (IV) administration of an mRNA therapeutic encoding for human methylmalonyl-CoA mutase (hMUT), the enzyme most frequently mutated in MMA, enabled liver expression of hMUT in MMA mouse models, leading to a significant reduction in methylmalonic acid and complete survival of treated mice versus control group with a dramatic improvement in weight gain. Repeat IV dosing did not increase markers of liver toxicity or inflammation. The study was conducted in partnership with researchers at the Medical Genomics and Metabolic Genetics Branch of the National Human Genome Research Institute at the National Institutes of Health.

Q4 2017 AND RECENT BUSINESS/FINANCIAL UPDATES
Board of Directors and Organizational Updates

John Mendlein joined Moderna as President, Corporate and Product Strategy. Earlier this month, Moderna announced that John Mendlein, Ph.D., joined the company as President, Corporate and Product Strategy. In this role, Dr. Mendlein will be responsible for corporate strategy, product advancement and strategy, partnering and product protection. He will serve on Moderna’s Executive Committee and report to Chief Executive Officer Stéphane Bancel.

Dr. Mendlein has helped start and lead numerous innovative life sciences companies. He is Vice Chairman of the Board and a founder of Fate Therapeutics, Inc., and holds board positions with Editas Medicine, Inc., and Axcella Health, Inc. He also serves on the Biotechnology Industry Organization ("BIO") emerging companies board. Dr. Mendlein previously served as the Chief Executive Officer of aTyr Pharma, and Fate Therapeutics, as well as Adnexus Therapeutics, Inc., (acquired by BMS). Before that, he served as Chairman and Chief Executive Officer of Affinium Pharmaceuticals, Ltd. (acquired by Debiopharm Group), and as a board member, General Counsel and Chief Knowledge Officer at Aurora Bioscience Corporation (acquired by Vertex Pharmaceuticals).

Stephen Berenson appointed to Board of Directors. In October, Moderna announced that Stephen Berenson was joining the company’s Board of Directors. Mr. Berenson, who joined Flagship Pioneering in June of 2017, previously served for 12 years as the Vice Chairman of Investment Banking at J.P. Morgan, and focused on providing high-touch strategic advice and complex transaction execution to leading companies across all industries globally. In total, Mr. Berenson spent more than 33 years with J.P. Morgan as an investment banker, where he worked across all major geographies, product areas and industry groups. He played key roles in building J.P. Morgan’s M&A, equities and technology investment banking businesses.

Continued growth across organization: In 2016, Moderna expanded its headcount from approximately 500 to nearly 600 team members.

Continued strong cash position: Moderna maintained a strong cash position in 2017. As of December 31, 2017, the company had approximately $910 million in cash, as compared to $1.306 billion in cash as of December 31, 2016.
2017 cash inflows: From reimbursement, product milestones and investment income was approximately $55 million.
Significant investments in the business: Moderna’s cash operating expense and capital expenditures in 2017 totaled approximately $455 million.

Castle Biosciences Launches Next-Generation Sequencing Panel DecisionDx-UMSeq for Uveal Melanoma

On January 5, 2018 Castle Biosciences, Inc., a provider of molecular diagnostics to improve cancer treatment decisions, reported the launch of the DecisionDx-UMSeq panel that uses next-generation sequencing (NGS) to identify somatic mutations in genes relevant to uveal melanoma (UM) (Press release, Castle Biosciences, JAN 8, 2018, View Source [SID1234523025]). The new test will complement Castle Biosciences’ standard-of-care DecisionDx-UM gene expression profile (GEP) test that has been shown to be independent of and superior to mutational analysis in assessing likelihood of metastasis in UM.

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The GEP test currently provides the best and most well-validated prognostic information about UM tumors. The additive role that the new DecisionDx-UMSeq results may provide in combination with DecisionDx-UM GEP results is undergoing refinement.

"For patients with uveal melanoma, tumor tissue is very limited, so it is imperative that we gain as much information as possible about a uveal melanoma tumor from a single precious biopsy," noted Federico A. Monzon, M.D. FCAP, Chief Medical Officer of Castle Biosciences. "Offering sequencing services from the same biopsy sample provided for the standard-of-care DecisionDx-UM test enables patients to receive actionable information from the most robust prognostic test available, while also obtaining mutational information that may enable a better understanding of the patient’s tumor and influence future patient care decisions."

The DecisionDx-UMSeq panel is now available to patients undergoing DecisionDx-UM prognostic (GEP) testing and will be run from the same tumor tissue biopsy. The results from the DecisionDx-UMSeq panel, along with the prognostic DecisionDx-UM and DecisionDx-PRAME GEP tests, will now provide a comprehensive genomic profile of a UM tumor from a single biopsy.

The DecisionDx-UMSeq panel will evaluate DNA mutations in seven genes known to be relevant to UM. The test will analyze hotspot mutations in GNAQ, GNA11, PLCB4, CYSLTR2, SF3B1; exons 1-2 of EIF1AX; and the coding exons of BAP1 gene. Mutations in GNAQ, GNA11, PLCB4, and CYSLTR2 are initiating events in the development of melanocytic tumors such as UM, while later driver mutations in EIF1AX, SF3B1, and BAP1 may impact the UM tumor’s ability to grow and metastasize. While no currently available therapies target pathways affected by the gene mutations evaluated in the DecisionDx-UMSeq panel, the genomic information may be useful in the future to inform patient care as UM research and therapeutic options evolve. Additional information about the genes in the DecisionDx-UMSeq panel is available here on the MyUvealMelanoma.com website.

How to order DecisionDx-UMSeq

The DecisionDx-UMSeq test can be ordered for patients who are having DecisionDx-UM GEP testing. The DecisionDx-UMSeq requisition form can be submitted concurrently with the DecisionDx-UM GEP test or after receipt of the GEP results. DecisionDx-UMSeq is currently validated for fine needle aspiration biopsy (FNAB) samples that have not previously been exposed to radiation. The sequencing test can be run from the same FNAB sample taken for the DecisionDx-UM GEP test.

About DecisionDx-UM

The DecisionDx-UM test measures the gene expression profile (GEP), or molecular signature, of an individual’s tumor and identifies with high accuracy the likelihood of metastasis. The DecisionDx-UM test is standard of care in the management of uveal melanoma in the majority of ocular oncology practices. Since 2009, the American Joint Committee on Cancer (AJCC; v7 and v8) has included GEP testing for identification of Class 1 and 2 as a prognostic factor recommended for clinical care. The AJCC is the only national organization that reviews uveal melanoma and the DecisionDx-UM test is the only clinically available GEP test for use in the U.S. The test has been validated in multiple prospective and retrospective studies. It is estimated that nearly 7 in 10 diagnosed patients in the U.S. receive DecisionDx-UM as part of their diagnostic workup. More information about the test and disease can be found at www.MyUvealMelanoma.com.

MEI Pharma Announces FDA Clearance of Investigational New Drug Application for CDK Inhibitor Voruciclib

On January 8, 2018 MEI Pharma, Inc. (Nasdaq: MEIP), an oncology company focused on the clinical development of novel therapies for cancer, reported that the U.S. Food and Drug Administration (FDA) has cleared the company’s Investigational New Drug Application (IND) for voruciclib, an orally available Cyclin Dependent Kinase 9 (CDK9) inhibitor, for patients with relapsed/refractory B-cell malignancies (Press release, MEI Pharma, JAN 8, 2018, View Source [SID1234523013]). Under this IND, MEI Pharma plans to initiate a Phase 1 study designed to determine the safety, tolerability, pharmacokinetics, pharmacodynamics, and preliminary clinical activity of voruciclib in patients with B-cell malignancies.

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"Inhibiting the function of certain CDK family members has shown significant clinical activity in breast cancer. Voruciclib inhibits CDK9 which controls expression of MCL-1, a known mechanism of resistance to apoptosis. Therefore, voruciclib alone or in combination with a BCL-2 inhibitor such as venetoclax offers a potential novel approach for treatment of B-cell malignancies," said Daniel P. Gold, Ph.D., President and Chief Executive Officer of MEI Pharma. "With the FDA clearance of our IND, we look forward to advancing voruciclib through the clinic in the second quarter of 2018 to demonstrate its clinical and commercial value."

About Voruciclib

Voruciclib (formerly P1446A; ME-522) has been tested in more than 70 patients in multiple solid tumor Phase 1 studies and has been associated with side effects consistent with other drugs in its class, including nausea, vomiting and diarrhea. In pre-clinical studies, voruciclib alone induces cell death in multiple patient-derived chronic lymphocytic leukemia (CLL) samples1. In additional pre-clinical studies, voruciclib shows dose-dependent suppression of MCL-1 at concentrations achievable with doses that appeared to be generally well tolerated in the Phase 1 studies2. Studies have shown that MCL-1 is an established resistance mechanism to the B-cell lymphoma 2 (BCL-2) inhibitor venetoclax (marketed as Venclexta)3.

Mateon Announces New Preclinical Data Demonstrating Enhanced Tumor Immune Responses when CA4P is Given in Combination with Checkpoint Inhibitors

On January 8, 2018 Mateon Therapeutics, Inc. (OTCQX:MATN), a biopharmaceutical company developing investigational drugs for the treatment of orphan oncology indications, reported new preclinical data further characterizing the improved anti-tumor immune response observed when animals are treated with CA4P in combination with anti-CTLA-4 antibodies (Press release, Mateon Therapeutics, JAN 8, 2018, View Source [SID1234523012]).

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The new findings show that treatment with the combination of CA4P and an anti-CTLA-4 antibody nearly doubles the amount of tumor necrosis (mean = 63.9%) compared to treatment with an anti-CTLA-4 antibody alone (32.8%), CA4P alone (37.3%) or vehicle control (25.8%) in a preclinical CT-26 mouse colon cancer model using immunohistochemistry analyses. Results from these analyses confirmed previously announced findings showing that treatment with CA4P and an anti-CTLA-4 antibody resulted in increased overall median numbers of tumor infiltrating CD8+ T lymphocytes. The new preclinical data also showed that the distribution of these beneficial CD8+T lymphocyte cells was observed throughout the tumor – in both the tumor rim and tumor core.

"These new data further show the promise of CA4P to stimulate the immune system and enhance the efficacy of checkpoint inhibitors," said William D. Schwieterman, M.D., President and Chief Executive Officer of Mateon Therapeutics. "We are excited that CA4P, when combined with a checkpoint inhibitor, shows dramatic increases in tumor necrosis which are clearly correlated with an increased immunologic response, more tumor regressions and increased overall survival. Given these new findings, the large clinical safety database for CA4P, and the need for new therapies for the many patients who have not responded to checkpoint inhibitor therapy, we believe CA4P has great promise for use with these immuno-oncology agents."

About Checkpoint Inhibitors

Anti-CTLA-4 antibodies stimulate a patient’s immune system by blocking immunosuppression and include the approved anti-cancer drug Yervoy. Mateon’s investigational drug CA4P stimulates a patient’s immune system in a different but complementary manner – by inducing immediate, rapid and extensive tumor cell necrosis. Utilizing these two different but complementary immune-stimulating approaches simultaneously has the potential to improve patient outcomes for the majority of cancer patients that do not respond adequately to therapy with checkpoint inhibitors alone.

About CA4P With Checkpoint Inhibitors

Mateon previously reported data from a CT-26 colon cancer animal model showing that combination treatment with CA4P and an anti-CTLA-4 antibody causes large reductions in tumor volume and statistically significant improvements in survival when compared to anti-CTLA-4 alone, CA4P alone, or vehicle control. Similar anti-tumor effects were observed when this combination was studied in an EMT-6 mammary tumor animal model. The CT-26 model was repeated for the studies reported today, again showing large reductions in tumor volume with combination therapy and also indicating a heightened immunologic response to the tumor in the presence of the two-drug combination. Importantly, treatment with both CA4P and an anti-CTLA-4 antibody generally maintains an elevated tumor-associated median effector T cell/regulatory T cell ratio, which also indicates a heightened immune response. Work to further characterize the immune response seen with the combination is ongoing.

Inovio Receives Milestone Payment from MedImmune as MEDI0457 and Checkpoint Inhibitor Combination Trial in Head and Neck Squamous Cell Cancer Advances to Phase 2

On January 8, 2018 Inovio Pharmaceuticals, Inc. (NASDAQ:INO) reported it has received a milestone payment from MedImmune as MEDI0457 (formerly called INO-3112 which MedImmune in-licensed from Inovio) in combination with durvalumab (MEDI4736) satisfactorily completed the phase 1 safety review portion of the study and has advanced to the phase 2 efficacy stage of the trial (Press release, Inovio, JAN 8, 2018, View Source [SID1234523010]). As part of a $700 million 2015 license and collaboration agreement, MedImmune, the global biologics research and development arm of AstraZeneca, is evaluating MEDI0457 in combination with durvalumab, its PD-L1 checkpoint inhibitor, in patients with recurrent/metastatic HPV-associated head and neck squamous cancer (HNSCC) in a clinical trial with an estimated enrollment of 50 patients.

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Under the 2015 agreement, MedImmune acquired exclusive rights to Inovio’s MEDI0457 immunotherapy. MEDI0457 targets cancers caused by human papillomavirus (HPV) types 16 and 18 which are responsible for more than 70 percent of cervical pre-cancers and cancers and are involved in the development of other tumors as well such as HNSCC. Within the broader license and collaboration agreement, MedImmune and Inovio will develop two additional DNA-based cancer therapy products not included in Inovio’s current product pipeline, which MedImmune has exclusive rights to develop and commercialize. Inovio will receive development, regulatory and commercialization milestone payments and will be eligible to receive royalties on worldwide net sales for these additional cancer vaccine products.

Dr. Ildiko Csiki, MD, PhD, Inovio Vice President, Clinical Development said, "We are pleased to see this combination study advance to the efficacy portion of the trial. Published preclinical studies suggest that treatment with HPV targeted immunotherapeutic approach in combination with PD-1/PD-L1 inhibition may be synergistic, and potentially increase efficacy of checkpoint inhibitors."

Dr. J. Joseph Kim, Inovio’s President and Chief Executive Officer, said, "Inovio’s primary goal is to become the global leader in HPV-related disease treatment. Along with MEDI’s development of MEDI0457 for HPV-related cancer, Inovio’s VGX-3100, is currently being tested in global phase 3 pivotal trials for cervical pre-cancer as well as a treatment for vulvar and anal pre-cancers caused by HPV. Overall, these products could be well-positioned to comprehensively treat HPV-related diseases across the continuum of HPV infections from pre-cancerous conditions to cancer in both women and men."

In a phase 1 study of MEDI0457 in 22 HPV-positive patients with HNSCC, Inovio has previously demonstrated that MEDI0457 generated robust antigen-specific CD8+ killer T cell responses in both tumor tissue and peripheral blood. One patient in that trial who initially displayed a slight increase in T cell immune responses developed progressive disease at 11 months into the study and subsequently received a PD-1 checkpoint inhibitor. The patient had a sustained complete response after only four doses of a checkpoint inhibitor, and continues on anti PD-1 therapy with no evidence of disease 18 months after initiation of the checkpoint inhibitor.

About MEDI0457 and VGX-3100

MEDI0457 (formerly called INO-3112 (VGX-3100, plus IL-12) which MedImmune in-licensed from Inovio) is under evaluation by MedImmune to treat HPV-associated cancers. Inovio is investigating VGX-3100, a DNA-based immunotherapy for the treatment of HPV-16 and HPV-18 infection and pre-cancerous lesions of the cervix (phase 3) and vulva (phase 2). VGX-3100 has the potential to be the first approved treatment for HPV infection of the cervix and the first non-surgical treatment for pre-cancerous cervical lesions. VGX-3100 works by stimulating a specific immune response to HPV-16 and HPV-18, which targets the infection and causes destruction of pre-cancerous cells. In a randomized, double-blind, placebo-controlled phase 2b study in 167 adult women with histologically documented HPV-16/18 cervical HSIL (CIN2/3), treatment with VGX-3100 resulted in a statistically significantly greater decrease in cervical HSIL and clearance of HPV infection vs. placebo. The most common side effect was injection site pain, and no serious adverse events were reported. VGX-3100 utilizes the patient’s own immune system to clear HPV-16 and HPV-18 infection and pre-cancerous lesions without the increased risks associated with surgery, such as loss of reproductive health and negative psychosocial impacts.