On October 31, 2023 HDT Bio Corp., a clinical-stage private company developing advanced RNA products to treat and prevent infectious diseases and cancer, reported that Dr. Steven Reed, Chief Executive Officer of HDT Bio, will present at the Society for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper) 2023 Annual Meeting in San Diego, California, on November 3 (Press release, HDT Bio, OCT 31, 2023, View Source [SID1234636583]). Dr. Reed will deliver a presentation on the AMPLIFY vaccine platform as a novel technology for cancer immunoprevention.

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HDT’s AMPLIFY vaccine platform is based on its self-amplifying RNA (repRNA) combined with LION, its patented nanoparticle-based formulation technology. LION not only stabilizes, protects, and transports RNA during formulation and administration, but also enhances safety. This approach, compared to current RNA vaccines, allows for simplified manufacturing processes, improved temperature stability, and heightened safety, thereby enabling multivalency for more effective and efficient vaccine products.

"Cancer is a formidable adversary. Our presence at the SITC (Free SITC Whitepaper) 2023 Annual Meeting underscores our commitment to advancing the field of immunoprevention," said Dr. Steven Reed, CEO of HDT Bio. "With the AMPLIFY vaccine platform and products derived thereof, we are committed to transforming the landscape of cancer care, marking a monumental leap towards a future where cancer is no longer a looming threat but a preventable condition."

Details of the presentation are as follows:

Title: Novel Technologies for Cancer Immunoprevention
Presenter: Steven Reed, Ph.D.
Category: Immunoprevention of Cancer
Session: Concurrent Session 106c
Date: Friday, November 3 at 2:15 p.m. Pacific Time
Location: Ground Level, Exhibit Hall D, San Diego Convention Center

On October 31, 2023 Citius Pharmaceuticals, Inc. ("Citius" or the "Company") (Nasdaq: CTXR) reported that preclinical research on LYMPHIR ("denileukin diftitox" or "E7777") was published today in Frontiers in Immunology1, a leading peer-reviewed journal in the immunology field (Press release, Citius Pharmaceuticals, OCT 31, 2023, View Source [SID1234636582]). The article reported positive results from a preclinical study that showed that denileukin diftitox in combination with an anti-PD-1 checkpoint inhibitor was more effective in the treatment of solid tumors (liver and colon) than either therapy alone. Data from this study contributed to the design and dosing regimen of two Phase 1 investigator-initiated studies currently underway at the University of Pittsburgh and the University of Minnesota.

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"We are excited to share the published results of this important animal study with the broader scientific community. The compelling results of this study showed that LYMPHIR administered in combination with an anti-PD-1 inhibitor, either sequentially or concurrently, led to significantly increased anti-tumor activity and prolonged survival compared to either treatment alone. Based on the strong signal of the study, two ongoing Phase 1 trials were initiated by investigators at leading cancer research institutions. We intend to share interim data from these studies when it becomes available. Importantly, the results of the preclinical study highlight LYMPHIR’s additional potential as a combination therapy in the treatment of solid tumors, which may allow Citius to explore substantially larger market opportunities for LYMPHIR in the future," stated Leonard Mazur, Chairman and CEO of Citius.

In recent years, one of the most important advances in solid tumor management has been the use of anti-PD-1/PDL1 antibody therapy. However, the effectiveness of treatment has varied, with not all tumors or patients responding with equivalent sensitivity to the treatment. The primary role of Treg-targeted cancer immunotherapy is to transiently deplete Treg cells. It is believed that regulatory T cells (Tregs) in the tumor microenvironment play an important role in patient resistance to anti-PD-1 immunotherapy. Targeting Tregs with LYMPHIR during treatment with anti-PD1/PDL1 checkpoint inhibitors may change the dynamics of the immune microenvironment, including anti-PD-1 sensitivity, in situations where Tregs are prominent. Consequently, the innovative preclinical study evaluated whether adding LYMPHIR improved the efficacy of anti-PD-1 antibody therapy. Syngeneic murine solid tumor models in colon cancer CT-26 and liver cancer H22 were used to conduct the study.

"This landmark study demonstrated that an increase in T-reg cell infiltration induced by anti-PD-1 treatment can be counterbalanced by their depletion by LYMPHIR, suggesting potential synergistic activity in a solid tumor model," stated Dr. Myron Czuczman, Chief Medical Officer of Citius. "We look forward to future results of ongoing human studies evaluating the potential benefit of Treg depletion by LYMPHIR in combination with checkpoint inhibitors and other immunomodulatory agents."

Key Study Findings

Targeting Tregs using LYMPHIR combined with anti-PD-1 (either sequentially or concurrently) demonstrated significant anti-tumor activity, and consistently targeted and transiently depleted Tregs in the tumor microenvironment
Combination treatment was more effective than monotherapy with either drug alone
Combination therapy was well-tolerated and significantly enhanced long-term survival in solid tumor-bearing animals
Mahdi, H. Woodall-Jappe, M., Singh, P., Czuczman, S., Targeting Regulatory T cells by E7777 enhances CD8 T-cell-mediated anti-tumor activity and extends survival benefit of anti-PD-1 in solid tumor models. Frontiers in Immunology. (Published online ahead of print, 2023 October 27).
About the Investigator Initiated Trials

A Phase 1 Study is underway at the University of Pittsburgh Medical Center (UPMC), Hillman Cancer Center. This study is an open label, Phase 1/1b study to investigate the safety and efficacy of a combined regimen of pembrolizumab with T-regulatory cell depletion via denileukin diftitox in patients diagnosed with recurrent or metastatic solid tumors. (Title: The efficacy of T-regulatory cell depletion with E7777 combined with immune checkpoint inhibitor, pembrolizumab, in recurrent or metastatic solid tumors: Phase I/II Study. NCT05200559). The study consists of two parts. Part I is a dose escalation study of four cohorts (3,6,9,12 mcg of LYMPHIR) and is expected to enroll 18-30 patients. Part II is a dose expansion study of approximately 40 patients to evaluate the safety and tolerability of the recommended combination dose of LYMPHIR and pembrolizumab (to include ovarian cancer and MSI-H cancer cohorts). The study will also investigate the alteration of the immune microenvironment within tumors and peripheral blood. Secondary endpoints include the objective response (complete response plus partial response), progression-free survival, and overall survival.

A Phase 1 trial has also been initiated at the University of Minnesota, Masonic Cancer Center. This study is a single-arm open-label trial which has an estimated enrollment of 20 participants who will be administered denileukin diftitox prior to receiving Chimeric Antigen Receptor (CAR-T) therapies. The Phase 1 study consists of two components: dose finding to establish a maximum tolerated dose (MTD) of denileukin diftitox in combination with CAR-T therapies and an extension component to provide an estimate of efficacy at that MTD. (Title: Phase I/II Trial Using E7777 to Enhance Regulatory T-Cell Depletion Prior to CAR-T Therapy for Relapsed/Refractory B-Cell Lymphoma (DLBCL) NCT04855253).

On October 31, 2023 Compugen Ltd. (Nasdaq: CGEN) (TASE:CGEN) a clinical-stage cancer immunotherapy company and a pioneer in computational target discovery, reported that it will present new data on its lead pre-clinical asset COM503, a potential first-in-class anti-IL18BP antibody in an oral presentation at the 38th Annual Meeting of the Society for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper), taking place 3-5 November 2023, San Diego, CA (Press release, Compugen, OCT 31, 2023, View Source [SID1234636581]). Abstracts have been released by SITC (Free SITC Whitepaper) today.

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"We are very excited to be presenting new pre-clinical data on COM503, a novel approach to harness cytokine biology to treat cancer, discovered using our proprietary computational discovery platform," said Anat Cohen-Dayag., Ph.D., President, and CEO at Compugen. "Cytokines are powerful therapeutic tools; however, there is a challenge of giving them systemically at levels high enough to reach and modulate the tumor microenvironment without causing systemic side effects. This is the reason for some recent clinical failures in this space."

Eran Ophir, Ph.D., Chief Scientific Officer at Compugen, added, "At SITC (Free SITC Whitepaper), during both oral and poster presentations, we will present evidence supporting our approach to harness IL-18 biology to fight cancer and address the challenges that led to past failures with the systemic dosing of cytokines. We show that following antibody blockade of IL-18BP, endogenous IL-18 levels in human tumors are sufficient to provoke an anti-tumor immune response. In addition, we show that administering an anti-IL18BP antibody is expected to have a better therapeutic window than administering an engineered IL-18 cytokine. Our data suggest that our anti-IL18BP antibody approach has a leading edge in inhibiting tumor growth while avoiding peripheral toxicity associated with administration of a cytokine. We look forward to discussing the data at SITC (Free SITC Whitepaper) over the coming days and the IND filing in 2024."

Key data that will be presented at SITC (Free SITC Whitepaper) include:

Antibody inhibition of IL-18BP prevented tumor growth across multiple mouse tumor models.
Antibody induced inhibition of IL-18BP resulted in a significant increase in functional immune-cells such as the effector T-cells and induced a T cell clonal expansion in the tumor, as well as an immune memory response.
Engineered IL-18 cytokine generated peripheral inflammatory responses evident by increased serum cytokines in contrast with an anti-IL-18BP antibody approach which modulated the tumor microenvironment without affecting the periphery.
Oral presentation details:

Abstract Title: Harnessing natural IL-18 activity through IL-18BP blockade reshapes the tumor microenvironment for potent anti-tumor immune response
Abstract number: 550
Session: Cytokines in Cancer
Date: Friday, November 3, 2023
Time: 3:30 PM – 5:10 PM PDT
The data will also be presented as a poster on Saturday, November 4, 2023

The abstract is available on the publication section of Compugen’s website at www.cgen.com as well as part of the JITC supplement. The poster and presentation will be made available on the publication section of Compugen’s website at www.cgen.com following presentation.

On October 31, 2023 OncoHost, a technology company transforming the approach to precision medicine for improved patient outcomes, reported a novel computational model for predicting significant immune-related adverse events (irAEs) in patients with non-small cell lung cancer (NSCLC) based on proteomic profiling of pre-treatment blood samples (Press release, OncoHost, OCT 31, 2023, View Source [SID1234636580]). The study was conducted using OncoHost’s PROphet platform and will be presented as a poster at the Society for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper)’s (SITC) (Free SITC Whitepaper) 38th Annual Meeting.

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Activation of the immune system by immune checkpoint inhibitors (ICIs) can result in complications known as immune-related adverse events (irAEs), which commonly affect the skin, liver, gastrointestinal tract, and endocrine organs, ranging in severity from mild (in the majority of cases) to life threatening. IrAEs can manifest at any point during a patient’s treatment, with the highest incidence occurring within the first three months. While most resolve with the appropriate intervention, some may become chronic and require lifelong care.

"While ICIs have shown success in treating non-small cell lung cancer, immune-related adverse events pose a complex challenge, complicating and affecting treatment efficacy and patients’ quality of life," said Yehonatan Elon, Ph.D., Chief Technology Officer at OncoHost. "The ability to anticipate the risk of irAEs in these patients prior to commencing treatment is a game-changer, as it enables the development of personalized management plans and strategies for risk reduction. We are excited about these results and look forward to improving the overall quality of cancer care for patients worldwide."

OncoHost’s predictive model was developed on a cohort of 426 ICI-treated NSCLC patients taking part in the company’s ongoing, multicenter PROPHETIC clinical trial (NCT04056247). Plasma samples and clinical data, including irAE occurrence, were collected, and deep proteomic profiling was conducted using SomaLogic’s (NASDAQ: SLGC) SomaScan platform, measuring the expression levels of approximately 7,000 proteins.

"It brings me great pride to witness the growth of our company, and the vast pipeline of indications that are coming to fruition through our PROphet platform," said Ofer Sharon, MD, CEO of OncoHost. "Our mission is to transform the approach to precision medicine for improved patient outcomes, and our scientific achievements are a testament to this dedication. The pressing concern regarding the lack of dependable pre-treatment biomarkers for predicting irAE development underscores a critical clinical need, and we are proud to spearhead the efforts to address this issue."

The clinical study was conducted in collaboration with Beaumont RCSI Cancer Centre, Asklepios Lung Clinic, Roswell Park Comprehensive Cancer Center, Sheba Medical Center Institute of Oncology,

Rabin Medical Davidoff Cancer Centre, Thomas Jefferson University, Northwestern University, Massachusetts General Hospital Cancer Center, among other institutions.

Poster Presentation Details

Session: Poster Hall

Abstract #: 1229

Title: Pre-treatment plasma proteomics-based predictive biomarkers for immune related adverse events in non-small cell lung cancer

The abstract will be available in the Journal for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper) (JITC) supplement.

On October 31, 2023 Kernal Biologics, Inc. (Kernal Bio) — a development-stage mRNA-technology company developing cancer therapeutics designed to improve patients’ survival rate and quality of life — reported that it is presenting a poster at the Society for Immunotherapy of Cancer (SITC) (Free SITC Whitepaper) 2023 Annual Meeting on Friday, November 3, 2023 in San Diego, CA (Press release, Kernal Biologics, OCT 31, 2023, View Source [SID1234636579]).

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The poster presentation features preclinical insights into KR-336, an onco-selective mRNA LNP therapeutic that Kernal Bio has rationally designed using their mRNA2.0 platform to be selectively translated into therapeutic protein within the tumor microenvironment. These data support the feasibility of systemically administering Kernal’s onco-selective mRNA LNP to achieve tumor-localized immunomodulation as a highly efficacious and well tolerated treatment option for patients with otherwise immunosuppressive tumors.

"Previously, we have shown that local onco-selective mRNA LNP therapy via intratumoral injections can result in complete responses in various pre-clinical murine tumor models, including those that are resistant to checkpoint inhibitors," said Kernal Bio Co-founder and Chief Executive Officer Yusuf Erkul, M.D. "At SITC (Free SITC Whitepaper), we look forward to reporting the outcome of in vivo proof-of-concept studies for systemic mRNA LNP administration, which resulted in robust anti-tumor effectiveness."

Details for the Kernal Bio presentation are as follows:

Poster Presentation: Systemically Administered Onco-Selective mRNA LNP Achieves Tumor Regression and Improves Overall Survival, As Monotherapy
Abstract #: 1339
Presenter: Matthew Strout, MD, PhD, Vice President of Business Development, Kernal Biologics
Time: Friday, November 3, 2023, 9:00 AM – 7:00 PM PDT