Altimmune Demonstrates Strong Neutralization of South African Variant in Preclinical Study of Intranasal AdCOVID™
Similar Neutralization Titers Observed for Both Ancestral
and B.1.351 South African Variant
Phase I Clinical Trial of AdCOVID Expected to Report Data in
In the current study, performed in collaboration with investigators at
“These data are impressive considering the B.1.351 variant has been consistently difficult to neutralize following vaccination with the original prototype vaccines,” said
Importantly, AdCOVID also promoted a strong mucosal neutralizing response to the B.1.351 virus in the respiratory tract with bronchoalveolar lavages showing neutralization of the variant virus. These preclinical data suggest that vaccination with AdCOVID leads to a cross-neutralizing antibody response both systemically and locally within the respiratory tract that can effectively neutralize the B.1.351 virus.
“We believe that our selection of the RBD of the spike protein as the vaccine antigen was key in obtaining these impressive results,” said
AdCOVID is a single-dose intranasal vaccine candidate for COVID-19 currently being evaluated in a Phase 1 clinical trial. It is designed to stimulate a broad immune response including both systemic immunity (neutralizing antibody) and local immunity (mucosal IgA, resident memory T cells) in the nasal cavity and respiratory tract.
In published preclinical studies (www.biorxiv.org/content/10.1101/2020.10.10.331348v1) conducted in collaboration with the
Based on data from Altimmune’s other intranasal platform vaccine candidates, AdCOVID is expected to have extended stability at room temperature that would allow for cold chain-free shipment of the vaccine. If demonstrated, AdCOVID could be stored in the common refrigerators found in community-based doctors’ offices and pharmacies for two years or more. The Company believes that these simple and convenient handling requirements, together with the potential ability to block SARS-CoV-2 transmission, could position AdCOVID as a leading intranasal COVID-19 vaccine.
Altimmune is a clinical stage biopharmaceutical company focused on developing intranasal vaccines, immune modulating therapies and treatments for liver disease. Our diverse pipeline includes proprietary intranasal vaccines for COVID-19 (AdCOVID™), anthrax (NasoShield™) and influenza (NasoVAX™); an intranasal immune modulating therapeutic for COVID-19 (T-COVID™); and next generation peptide therapeutics for NASH (ALT-801) and chronic hepatitis B (HepTcell™). For more information on Altimmune, please visit www.altimmune.com.
Any statements made in this press release relating to future financial or business performance, conditions, plans, prospects, trends, or strategies and other financial and business matters, including without limitation, the timing of key milestones for our clinical assets, the timing of the data readout from the AdCOVID Phase 1 clinical trial in
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Source: Altimmune, Inc.