On April 18, 2023 Genprex, Inc. ("Genprex" or the "Company") (NASDAQ: GNPX), a clinical-stage gene therapy company focused on developing life-changing therapies for patients with cancer and diabetes, reported that independent researchers recently presented preclinical data on the tumor suppressor gene, TUSC2, reporting that it functions as a novel tumor suppressor for glioblastoma (Press release, Genprex, APR 18, 2023, View Source [SID1234630239]). TUSC2 is the tumor suppressor gene that is reexpressed in tumors using REQORSA Therapy treatment, Genprex’s lead drug candidate. Genprex has no affiliation with these researchers.

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The independent researchers presented their abstract, titled, "Investigating TUSC2 for its tumor suppressive functions in glioblastoma and its role in gliomagenesis," at the 2023 American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting on April 17. The abstract reports TUSC2 protein expression, but not mRNA expression, to be significantly decreased in glioblastoma as compared to normal brain. TUSC2 protein is destabilized in glioblastoma due to polyubiquitination by E3 ligase, neural precursor cell-expressed developmentally downregulated gene 4 (NEDD4), and degradation by the proteasome. The researchers determined that NEDD4 targets TUSC2 on lysine residue K71.

The researchers also reported that TUSC2 overexpression reduced colony formation and neurosphere formation and promoted apoptosis of glioblastoma cells in vitro, and suppressed tumor growth in vivo. Further, glioblastoma cells with CRISPR-mediated knockout (KO) of TUSC2 were highly aggressive in vitro and in vivo, demonstrating the role of TUSC2 as a novel tumor suppressor for glioblastoma.

In the study, researchers performed immunoprecipitation-mass spectrometry analysis to identify TUSC2-interacting proteins in both normal human astrocytes and glioblastoma cell lines. Results showed 95 and 88 TUSC2-interacting proteins in astrocytes and glioblastoma cell lines respectively, and 27 proteins were found to interact with TUSC2 in both astrocytes and glioblastoma.

"This research supports the growing body of studies evaluating TUSC2 as a target in oncology, and potentially an effective treatment, for many types of cancer," said Rodney Varner, Chairman, President and Chief Executive Officer of Genprex. "We are encouraged by the increasing number of research institutions and independent researchers producing positive data on TUSC2, which provide additional support for REQORSA and its therapeutic potential against cancers."

REQORSA Therapy is currently in development for the treatment of non-small cell lung cancer (NSCLC) and small-cell lung cancer (SCLC). REQORSA consists of the TUSC2 gene expressing plasmid encapsulated in non-viral nanoparticles made from lipid molecules (the Company’s ONCOPREX Nanoparticle Delivery System) with a positive electrical charge. REQORSA is injected intravenously and specifically targets cancer cells, taking advantage of leaky tumor vascularity, increased tumor pinocytosis, and attraction of positively charged lipid nanoparticles to negatively charged cancer cells. REQORSA is designed to deliver the functioning TUSC2 gene to cancer cells while minimizing their uptake by normal tissue.

According to the National Brain Tumor Society, glioblastoma is one of the most complex, deadly, and treatment-resistant cancers. More than 13,000 Americans were expected to receive a glioblastoma diagnosis in 2022. Glioblastoma accounts for 49.1 percent of all primary malignant brain tumors. There have only been five drugs and one device ever approved by the U.S. Food and Drug Adminstration for the treatment of glioblastoma.

Other independent researchers and studies have found that TUSC2 therapy may benefit other types of cancer, including head and neck, breast (including triple-negative breast cancer), renal cell (kidney), thyroid, and soft tissue sarcoma, as well as NSCLC and SCLC. For more information and additional studies supporting TUSC2, please refer to our Bibliography Page.

On April 18, 2023 Genmab A/S (Nasdaq: GMAB) reported that worldwide net trade sales of DARZALEX (daratumumab), including sales of the subcutaneous (SC) product (daratumumab and hyaluronidase-fihj, sold under the tradename DARZALEX FASPRO in the U.S.), as reported by Johnson & Johnson were USD 2,264 million in the first quarter of 2023 (Press release, Genmab, APR 18, 2023, View Source [SID1234630238]). Net trade sales were USD 1,191 million in the U.S. and USD 1,072 million in the rest of the world. Genmab receives royalties on the worldwide net sales of DARZALEX, both the intravenous and SC products, under the exclusive worldwide license to Janssen to develop, manufacture and commercialize daratumumab.

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On April 18, 2023 Moleculin Biotech, Inc., (Nasdaq: MBRX) ("Moleculin" or the "Company"), a clinical stage pharmaceutical company with a growing pipeline, including Phase 2 clinical programs, for hard-to-treat tumors and viruses, reported that positive preclinical data regarding the Company’s next-generation anthracycline, Annamycin, was presented at the American Association for Cancer Research (AACR) (Free AACR Whitepaper) Annual Meeting 2023, taking place April 14-19, 2023, at the Orange County Convention Center in Orlando, FL (Press release, Moleculin, APR 18, 2023, View Source [SID1234630237]). This research was sponsored by the Company.

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The poster titled, Exploration of Annamycin Organotropism to Target Primary and Metastatic Liver Cancers was presented by Rafal Zielinski, Ph.D., Department of Experimental Therapeutics, Division of Cancer Medicine, The University of Texas MD Anderson Cancer Center as part of the Experimental and Molecular Therapeutic Session "Novel Antitumor Agents, PI3K/AKT Inhibitors, Proteasome Inhibitors, and Topoisomerases". The poster outlined results from the analysis of the pharmacokinetics of two formulations of Annamycin, liposome formulated drug product (L-ANN) and free Annamycin (ANN), in the liver in comparison with doxorubicin (DOX) and to determine its tumoricidal potential in a hepatocellular carcinoma (HCC) model in situ and in experimental models of liver metastasis.

"Annamycin has continued to demonstrate in preclinical models promising results in hard-to-treat tumors. We are pleased with the findings from these preclinical models in HCC, the most common type of primary liver cancer that is responsible for more than 12,000 deaths per year in the US. The high antitumor activity seen preclinically with Annamycin is very encouraging and provides validation for expanded studies to assess activity in different tumor liver metastasis models as well as HCC models," commented Walter Klemp, Chairman and Chief Executive Officer of Moleculin.

Annamycin is the Company’s next-generation anthracycline that has been designed to be non-cardiotoxic (unlike currently prescribed anthracyclines) and has been shown in animal models to accumulate in the lungs at up to 30-fold the level of doxorubicin (a commonly prescribed anthracycline), as well as demonstrating the ability to avoid the multidrug resistance mechanisms that typically limit the efficacy of doxorubicin and other currently prescribed anthracyclines.

The levels of ANN and DOX in plasma and tissue homogenates were assessed using LC/MS. The antitumor efficacy of L-ANN was studied using HEPA 1-6 hepatocellular carcinoma models (subcutaneous, orthotopic, and experimental liver metastatic models) as well as CT26 colon cancer and MIA PaCa-2 pancreatic cancer liver metastasis models.

Data Highlights:

ANN exhibited significantly higher accumulation in the liver parenchyma when compared to DOX (6-fold higher AUC values).

Researchers observed clear inhibition of the subcutaneous tumor growth after systemic (IV) administration of L-ANN.

Increased liver uptake of the drug had a direct effect on activity of the drug in vivo. Remarkable activity of L-ANN was observed in orthotopic models. Significant inhibition of the tumor growth and extension of the survival of L-ANN treated mice vs. vehicle-receiving animals was observed in HEPA 1-6 models (median survival 29.5 vs 50 days (p<0.0001) and 28 vs 59 days (p<0.0001), respectively).

L-ANN treatment resulted in dramatic increase in survival (median survival >407 days) in the CT26 colon cancer experimental metastasis model. In a separate experiment, significant delay in tumor progression was also observed in pancreatic cancer (MIA PaCa-2) liver metastasis model.

Annamycin is currently being evaluated in ongoing clinical trials for the treatment of STS lung metastases and AML. For more information about the ongoing trials, please visit clinicaltrials.gov and reference identifiers NCT04887298 and NCT05319587, respectively. Unless specifically noted otherwise, references to "Annamycin" refer to the liposome formulated form of the drug.

About Annamycin

Annamycin is the Company’s next-generation anthracycline that has been shown in animal models to accumulate in the lungs at up to 30-fold the level of doxorubicin. Importantly, Annamycin has also demonstrated a lack of cardiotoxicity in multiple early-stage human clinical trials, including ongoing trials for the treatment of acute myeloid leukemia (AML) and STS lung metastases. For that reason, although additional data will be necessary, the Company believes Annamycin may not face the same usage limitations imposed on doxorubicin, one of the most common currently approved anthracyclines. Annamycin is currently in development for the treatment of AML and STS lung metastases and the Company believes the drug may have the potential to treat additional indications.

On April 18, 2023 Evaxion Biotech A/S (NASDAQ: EVAX) ("Evaxion" or the "Company"), a clinical-stage biotechnology company specializing in the development of AI-powered immunotherapies, reported promising clinical data from its Phase 1/2a first-in-human study of its DNA-based personalized cancer immunotherapy, EVX-02 in combination with the checkpoint inhibitor nivolumab (Press release, Evaxion Biotech, APR 18, 2023, View Source [SID1234630236]). Data were presented in the Late Breaking Research: Clinical Research 2 session at the 2023 AACR (Free AACR Whitepaper) (American Association for Cancer Research) meeting in Orlando, Florida.

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The study, in patients with resected melanoma, showed that:

· All 10 patients who received the full dosing schedule of 8 immunizations with EVX-02 were relapse-free at their last assessment
· Of these 10 patients, 9 completed the full study and were relapse-free at the 12-month end of study visit. One patient was prematurely terminated due to non-EVX-02 related adverse events (AEs), and was relapse-free at the last visit at 9 months
· The combination of EVX-02 and nivolumab was well tolerated and only mild EVX-02-associated AEs were observed
· Robust and long-lasting neoantigen-specific T-cell immune responses were confirmed in all EVX-02 completers
· The induced T-cell immune responses involved both CD4+ and CD8+ T cells

"We are extremely happy to share the positive clinical data from our Phase 1/2a EVX-02 study at AACR (Free AACR Whitepaper). We met both our primary endpoints on safety, tolerability and immunogenicity and our secondary endpoint on clinical efficacy. With all 10 patients who completed the EVX-02 treatment being relapse-free during the trial and with robust and treatment-specific immune responses, we see clear signs of a protective cancer vaccination effect", said Per Norlén, Chief Executive Officer of Evaxion. "The EVX-02 data affirm our ability to select the right neoantigens, matched to the cancer of each patient, and provide further validation of our AI platform PIONEERTM. They also support our plan to fast track our next-generation DNA-based personalized cancer immunotherapy, EVX-03, to the clinic in Q4."

About the Phase 1/2a Study with EVX-02

The open-label, single-arm, multi-center Phase 1/2a study (NCT04455503) was designed to evaluate the combination of EVX-02 plus nivolumab in patients who had undergone complete surgical resection of late stage melanoma and were at high risk for recurrence. The primary objectives of the 12-month study were to assess the safety, tolerability and immunogenicity of EVX-02 plus nivolumab. In addition, the study was intended to evaluate relapse free survival. Evaxion reported initial, interim safety and immunogenicity data from the first 8 patients in the study in November 2022.

On April 18, 2023 Dynavax Technologies Corporation (Nasdaq: DVAX), a commercial stage biopharmaceutical company developing and commercializing innovative vaccines, will report first quarter 2023 financial results on Tuesday, May 2, 2023, after the U.S. financial markets close (Press release, Dynavax Technologies, APR 18, 2023, View Source [SID1234630235]).

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Dynavax will host a conference call and live audio webcast on Tuesday, May 2, 2023, at 4:30 p.m. ET/1:30 p.m. PT.

The live audio webcast may be accessed through the "Events & Presentations" page on the "Investors" section of the Company’s website at View Source A replay of the webcast will be available for 30 days following the live event.

To dial into the call, participants will need to register for the call using the caller registration link. It is recommended that participants dial into the conference call or log into the webcast approximately 10 minutes prior to the call.