Prefusion Coronavirus Spike Proteins and Their Use
CoV spike (S) proteins mediate cellular attachment and membrane fusion and are therefore the target of protective antibodies. Inventors at the Vaccine Research Center of the National Institute of Allergy and Infectious Diseases have developed a novel CoV S protein vaccine antigen. This technology employs protein engineering to stabilize S in its prefusion conformation, preventing structural rearrangement, and exposing antigenically preferable surfaces. The technology has been applied to several CoV spikes, including those from human-relevant viruses, such as HKU1-CoV, SARS-CoV, and MERS-CoV. Particularly for MERS-COV, stabilized S proteins have been shown to elicit superior neutralizing antibody responses up to 10-fold higher in animal models and protect mice against lethal MERS-CoV infection. This technology is applicable for delivery via other platforms, such as mRNA.
This technology is available for licensing for commercial development in accordance with 35 U.S.C. 209 and 37 CFR part 404, as well as for further development and evaluation under a research collaboration.
- The stabilized prefusion coronavirus spike protein can be used as a vaccine antigen to elicit robust neutralizing antibody responses.
- Improved immunogenicity compared to other coronavirus S vaccine formulations.
- Increased protein expression, stability, and manufacturability compared to wild-type CoV S.