Identification of a pan- orthoebolavirus -reactive antibody from an rVSV-EBOV vaccinated individual
Year: 2026
Type: preprint
Abstract: Orthoebolaviruses such as Ebola virus (EBOV), Sudan virus (SUDV) and Bundibugyo virus (BDBV) can cause severe disease with high case-fatality rates. While licensed EBOV vaccines and therapeutic antibodies protect against EBOV infection, no single monoclonal antibody currently provides broad protection across multiple orthoebolaviruses. Here, we analyzed the humoral immune response of an rVSV-EBOV vaccinee to identify pan- orthoebolavirus -neutralizing antibodies. Using BDBV- and SUDV-glycoproteins for single B cell-sorting, we identified B10, which neutralized authentic EBOV and SUDV, with potent activity against SUDV compared with established cross-reactive antibodies. Structural analysis mapped antibody B10 binding to the pan- orthoebolavirus conserved GP2-stalk/HR2 region, associated with asymmetric trimer destabilization and spike opening. In vivo, B10 showed significant prophylactic efficacy in an EBOV mouse model and partial protection with antiviral activity in a SUDV mouse model. Together, these findings demonstrate that rVSV-EBOV vaccination induced the development of a broadly orthoebolavirus-neutralizing antibody that holds exeptional therapeutic potential.
Authors: Paulina Tarnow, Hadas Cohen-Dvashi, Cornelius Rohde, Verena Krähling, Leon Ullrich, Lutz Gieselmann, Hagar Zar Shuker, Shreeya Amatya, Anahita Fathi, Alexandra Kupke, Christoph Kreer, BSL-4 Animal Facility Team, Manuel Koch, Marylyn M. Addo, Stephan Becker, Ron Diskin, Matthias Zehner, Florian Klein
Language: English
Subfield: Infectious Diseases
Field: Medicine
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W7205007713