Seeking Improved Immune Response vs mRNA Vaccine

ATLANTA, GA, July 20, 2023 — GeoVax Labs, Inc. (Nasdaq: GOVX), a biotechnology company developing immunotherapies and vaccines against cancers and infectious diseases, today announced the start of an investigator-initiated clinical trial (ClinicalTrials.gov Identifier: NCT05672355 ), titled “ Randomized observer-blinded phase 2 trial of COVID-19 booster with GEO-CM04S1 or Pfizer-BioNTech Bivalent vaccine in patients with chronic lymphocytic leukemia ,” at City of Hope National Medical Center, led by Alexey Danilov, M.D., PhD as principal investigator. GEO-CM04S1, a multi-antigenic SARS-CoV-2 vaccine that targets the spike (S) and nucleocapsid (N) proteins of SARS-CoV-2, is actively under clinical study by GeoVax in severely immunocompromised individuals, as well as in healthy adults for use as a universal heterologous booster.

Despite a high vaccination rate, chronic lymphocytic leukemia (CLL) patients may be at high risk for lethal COVID-19 infection due to poor immune response to COVID-19 infections or vaccination. The GEO-CM04S1 vaccine uses a modified vaccinia virus (MVA) backbone that may be more effective at inducing COVID-19 immunity in patients with poor humoral immune responses since MVA strongly induces T cell expansion even in the background of immunosuppression. Targeting both the spike and nucleocapsid protein antigens broaden the specificity of the immune responses and protects against the loss of efficacy associated with the significant sequence variation observed with the spike antigen.

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The study will examine the use of two injections of GEO-CM04S1 three months apart to assess immune responses in these vulnerable patients, with the Pfizer-BioNTech Bivalent vaccine as the control arm. Participants will be randomized 1:1 to receive two boosters with either the GEO-CM04S1 or the control vaccine. The primary immune response outcome will be 56 days following the first booster injection. Up to 40 participants will be treated in each arm, with immune responses evaluated at the interim and final analyses in each arm.

Brian Koffman, M.D.C.M., FCFP DABFP (retired) MS Ed, Executive Vice President and Chief Medical Officer of the CLL Society, a nonprofit dedicated to the unmet needs of those diagnosed with CLL/small lymphocytic lymphoma (SLL), commented, “Despite the current authorized COVID-19 vaccines providing protective immunity among the majority of patient populations, individuals with CLL/SLL, regardless of their treatment status, have had less predictable and often insufficient immune responses to the currently authorized vaccines. Within the CLL/SLL patient population, more robust and durable protective immunity is needed, especially next-generation vaccines that could induce stronger T cell and antibody responses. This trial leverages past success with a similar type of vaccine used for protection against a different viral infection in the immunocompromised to develop a vaccine intended to provide enhanced and more durable protection against COVID-19 infections in the high-risk CLL/SLL population. The CLL Society and the CLL/SLL community welcome this study and look forward to the results.”

Kelly McKee, M.D., GeoVax Chief Medical Officer, commented, “Unpublished clinical data recently presented at several medical conferences confirmed our earlier findings in healthy adults that GEO-CM04S1 stimulated a robust, durable, and broad-based humoral and cellular immune response against multiple SARS-CoV-2 variants, and by extension, to immunocompromised patients. Validation of these findings in additional patients with hematologic malignancies, who have received CAR-T and stem cell transplants, is underway as we seek to provide a vaccine solution to those individuals unable to mount adequate protective responses with currently available COVID-19 vaccines. We expect the CLL trial will further confirm the potential benefit of CM04S1 in another population of immunocompromised individuals.”

David Dodd, GeoVax President, and CEO, added, “ We are excited to begin this third important study for CM04S1 and look forward to sharing progress reports as we advance. We believe the CM04S1 vaccine, containing the two antigens, S and N, along with the recognized antibody and cellular immune responses resulting from the MVA approach, has the potential to offer greater booster protection than that from the current vaccines in use, as well as provide a greater degree of protection within immunocompromised patients.”

About GEO-CM04S1

GEO-CM04S1 is a next-generation COVID-19 vaccine based on GeoVax’s MVA viral vector platform, which supports the presentation of multiple vaccine antigens to the immune system in a single dose. CM04S1 presents both the spike and nucleocapsid antigens of SARS-CoV-2 and is specifically designed to induce both antibody and T cell responses to non-variable parts of the virus. The more broadly specific and functional engagement of the immune system is designed to protect against the new and continually emerging variants of COVID-19. Based on data from animal models and a completed Phase 1 clinical study, vaccine-induced immune responses were shown to recognize both early and later variants of SARS-CoV-2, including the Omicron variant. Vaccines of this format should not require repeated modification and updating.

A recent presentation of unpublished data from the open-label portion of the Phase 2 trial of CM04S1 ( ClinicalTrials.gov Identifier : NCT04977024 ) in patients undergoing hematological cancer treatment (i.e., patients who have reduced immune system function as a result of treatment ) indicates that CM04S1 is highly immunogenic in these patients, inducing both antibody responses, including neutralizing antibodies, and T cell responses. These data support the planned progression of the Phase 2 clinical study, which will include a direct comparison to currently approved mRNA vaccines. CM04S1 also continues to advance in another Phase 2 clinical trial as a booster for healthy patients who have previously received the Pfizer or Moderna mRNA vaccine (ClinicalTrials.gov Identifier: NCT04639466 ). Data from these studies will form the basis for comparing vaccine potential in unique patient groups as well as the general population.

GeoVax Labs, Inc. is a clinical-stage biotechnology company developing novel therapies and vaccines for solid tumor cancers and many of the world’s most threatening infectious diseases. The company’s lead program in oncology is a novel oncolytic solid tumor gene-directed therapy, Gedeptin ® , presently in a multicenter Phase 1/2 clinical trial for advanced head and neck cancers. GeoVax’s lead infectious disease candidate is GEO-CM04S1, a next-generation COVID-19 vaccine targeting high-risk immunocompromised patient populations. Currently, in two Phase 2 clinical trials, GEO-CM04S1 is being evaluated as a COVID-19 vaccine for immunocompromised patients such as those suffering from hematologic cancers and other patient populations for whom the current authorized COVID-19 vaccines are insufficient. In addition, GEO-CM04S1 is in Phase 2 clinical trial evaluating the vaccine as a more robust, durable COVID-19 booster among healthy patients who previously received the mRNA vaccines. GeoVax has a leadership team who have driven significant value creation across multiple life science companies over the past several decades. For more information, visit our website: www.geovax.com.

Source: GeoVax

Georgia Life Sciences Designates City of Atlanta as Newest BioReady® Community

By Sheran Brown • February 21, 2025
Georgia Life Sciences Designates City of Atlanta as Newest BioReady® Community

Bipartisan PBM Reform Back in Focus as House Committee Plans Hearing

By Sheran Brown • February 20, 2025
A renewed push for prescription drug cost reform is gaining momentum in Congress, with the House Energy and Commerce Committee's health subcommittee planning a hearing on pharmacy benefit manager (PBM) reform for late February. The hearing, to be led by Rep. Buddy Carter (R-Ga.), signals a revival of bipartisan efforts to regulate these pharmaceutical intermediaries. PBMs, which negotiate drug prices for insurers and employers, have become a focal point in the broader discussion of healthcare costs. A previous bipartisan agreement to regulate these entities was crafted by Carter and Rep. Diana DeGette (D-Colo.) in the last Congress, though it ultimately stalled when the larger spending bill it was attached to faced opposition. The reform efforts enjoy broad support from both parties and the president, making it one of the few areas with potential for bipartisan cooperation. However, new complications have emerged as Republicans consider using PBM regulations to generate savings for their broader policy agenda, potentially requiring up to $880 billion in cost reductions. The path forward remains uncertain, with ongoing debates about whether such reforms would qualify for budget reconciliation and whether using PBM regulations as a funding mechanism could derail bipartisan cooperation. Meanwhile, stakeholders continue to disagree on the impact of additional PBM regulation, with pharmaceutical companies arguing that PBMs inflate drug costs while PBMs contend that new regulations would increase prices.

Council on State Biotechnology Associations says NIH funds are a critical component of innovation ecosystem

By Sheran Brown • February 20, 2025
The Council of State Biotechnology Associations (CSBA) has issued a strong warning about proposed cuts to National Institutes of Health (NIH) funding, emphasizing the critical role these grants play in America's biotech innovation ecosystem. The statement, below , comes amid concerns over recent guidance that would reduce NIH funding to key research institutions. ----------------------- “Today, the US biotech industry employs nearly 2.3 million people across the US and is making positive contributions to economic impact and national security across all 50 states. In fact, for every dollar the National Institutes of Health (NIH) contributes to a successful drug, the private sector invests over $65, underscoring the agency’s unparalleled return on investment. As the associations representing the bioscience industry across the nation, the Council on State Biotechnology Associations (CSBA) is concerned by recent guidance that would cut funding provided by the NIH to universities, hospitals, and other institutions that perform critical early-stage research. NIH grant funds are a critical component of our innovation ecosystem. Grants for basic research are the spark that leads to university-driven discoveries, with public-private partnerships and tech transfers that bridge early-stage research to industry-sponsored drug development and ultimately to FDA approved medical advances for hundreds of diseases. While the administration looks for greater efficiency in the use of taxpayer dollars, it cannot be overstated - once scientific innovation moves abroad, it may never return. In the race for scientific innovation around the world, as our adversaries continue to increase government investments in research, we encourage President Trump to follow suit and ensure that we maintain our global leadership in an industry that was created and thrives across the US.”
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