- PDS0202 (Infectimune® + COBRA influenza antigens) vaccination also prevented illness/weight loss
- Vaccine protected against replication of the virus in the lungs of ferrets after challenge with the H1N1 virus
- Data from Cleveland Clinic’s Ted Ross Lab presented at the 9th ESWI Influenza Conference
PRINCETON, N.J., Sept. 20, 2023 (GLOBE NEWSWIRE) — PDS Biotechnology Corporation (NASDAQ:PDSB) (PDS Biotech or the Company), a clinical-stage immunotherapy company developing a growing pipeline of targeted cancer immunotherapies and infectious disease vaccines based on the Company’s proprietary T cell activating platforms, today announced its investigational universal influenza vaccine PDS0202 demonstrated active neutralization across multiple influenza viruses. The vaccine also provided protection against infection after challenged with high doses of the H1N1 virus in ferrets not previously exposed to flu. The data were presented in an oral lecture at the 9th European Scientific Working Group on Influenza (ESWI) Conference in Valencia, Spain by James Allen, PhD, from the Cleveland Clinic laboratory of renowned influenza expert, Ted Ross, PhD.
“We are encouraged that PDS0202 has demonstrated activity in generating protective hemagglutination inhibition assay (HAI) antibody responses in pre-immune ferret studies, which are the gold standard in influenza vaccine testing. In addition to active neutralization of various influenza strains, the data demonstrated that PDS0202 prevented illness, weight loss and importantly protected the lungs of vaccinated animals from H1N1,” said Dr. Ross. “In humans, we expect PDS0202 to elicit a similar or more broadly reactive antibody profile due to humans having broader exposure to influenza and thus the recall of a more diverse population of memory B cells than the animals evaluated in our preclinical studies.”
H3N2 HAI Response
Vaccination with PDS0202 Provides broadly effective HAI antibody responses (minimum 1:40 ratio) across multiple strains of the H3N2 virus including Swtiz/13 and Kan/17 demonstrating the broad reactivity of the novel COBRA proteins. Similar results were demonstrated against multiple strains of the H1N1 virus.
H1N1 Infection Results: D3 Nasal Wash Viral Titers
PDS0202 (Y2 + NG2 COBRA proteins) prevents viral replication in the lungs of ferrets after vaccination followed by viral challenge with A/Victoria/2570/2019 H1N1 flu strain (1e6 PFU/mL). The quantity of H1N1 virus stays below the detection limits. The vaccine based on the wild type HA (Mich/15 + Sing/16) and the control (Mock) do not effectively prevent replication and expansion of the H1N1 virus in the lungs of the ferrets.
PDS0202 combines PDS Biotech’s Infectimune® novel investigational immune activating platform with proprietary Computationally Optimized Broadly Reactive Antigens (COBRA) influenza antigens. The COBRA antigens developed in the laboratory of Dr. Ted Ross were designed using an in-silico layered consensus building approach, which utilizes HA sequence data from influenza surveillance databases. PDS0202’s ability to generate broad, robust antibody and T cell responses position the vaccine to potentially provide durable protection against seasonal and pandemic strains of influenza. PDS0202 is administered through intramuscular injection in a single dose.
“We are pleased that the PDS0202 data presented at the ESWI Influenza Conference are consistent with our previously reported preclinical studies in murine models, marking encouraging progress toward a potential universal influenza vaccine,” said Lauren V. Wood, MD, Chief Medical Officer of PDS Biotech. “We look forward to our continued discussions with the National Institute of Allergy and Infectious Diseases to advance PDS0202 into clinical trials with the goal of creating a universal vaccine that provides broad protection against multiple strains of influenza.”
In previous preclinical studies, PDS0202 demonstrated the ability to promote robust induction of broadly neutralizing influenza-specific antibodies, flu-specific CD4 (helper) and CD8 (killer) T cells, as well as long-lasting memory T cells. This robust immune response to the COBRA antigens suggests strong potential for PDS0202 as a broad and long-term protecting universal influenza vaccine.
