Abstract
The Lassa virus is endemic in parts of West Africa, and it causes hemorrhagic fever with high mortality. The development of a recombinant protein vaccine has been hampered by the instability of soluble Lassa virus glycoprotein complex (GPC) trimers, which disassemble into monomeric subunits after expression. Here, we use two-component protein nanoparticles consisting of trimeric and pentameric subunits to stabilize GPC in a trimeric conformation. These GPC nanoparticles present twenty prefusion GPC trimers on the surface of an icosahedral particle. Cryo-EM studies of GPC nanoparticles demonstrated a well-ordered structure and yielded a high-resolution structure of an unliganded GPC. These nanoparticles induced potent humoral immune responses in rabbits and protective immunity against the lethal Lassa virus challenge in guinea pigs. Additionally, we isolated a neutralizing antibody that mapped to the putative receptor-binding site, revealing a previously undefined site of vulnerability. Collectively, these findings offer potential approaches to vaccine and therapeutic design for the Lassa virus.
Original language | English (US) |
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Pages (from-to) | 1759-1772.e12 |
Journal | Cell Host and Microbe |
Volume | 30 |
Issue number | 12 |
DOIs | |
State | Published - Dec 14 2022 |
Keywords
- Lassa virus
- antibody
- challenge study
- cryo-EM
- nanoparticles
- vaccine
ASJC Scopus subject areas
- Parasitology
- Microbiology
- Virology