VH-Fc ab8

A SARS-CoV-2 neutralizing VH antibody.

Phase of research

Potential treatment - pre-clinical evidence

How it helps

Antiviral

Drug status

Experimental

2
Supporting references
0
Contradictory references
0
AI-suggested references
0
Clinical trials

General information

VH-Fc ab8 represents a IgG1 heavy chain variable domain (VH) neutralizing SARS-CoV-2 (prepared using phage display technique with the SARS-CoV-2 spike protein RBD serving as the target) fused with human IgG1 crystallizable fragment (Fc) (Li et al., 2020).


Synonyms

VH Fc ab8

 


Supporting references

Link Tested on Impact factor Notes Publication date
High Potency of a Bivalent Human VH Domain in SARS-CoV-2 Animal Models
Animal model In vitro Antibody
Vero E6 cells; 293T cells; BALB/c mice; hamsters; Mouse ACE2 adapted SARS-CoV-2; SARS-CoV-2 (US_WA-1/2020) 38.64

The engineered antibody binds to the SARS-CoV-2 spike protein and its RBD with high affinity (higher than ACE2-Fc) and has potent neutralization capability in vitro. Mice that had been administered VH-Fc ab8 manifested effective inhibiton of SARS-CoV-2 (mice ACE2-adapted model). VH-Fc ab8 displayed both prophylactic and therapeutic efficacy in a hamster SARS-CoV-infection model, did not bind to human membrane proteins and did not form aggregates.

Sep/04/2020
Cryo-electron microscopy structures of the N501Y SARS-CoV-2 spike protein in complex with ACE2 and 2 potent neutralizing antibodies
Spike protein ACE2 Spike variant Cryo-EM Biophysical assay In vitro Antibody
in vitro biophysical assay; cryo-EM 7.08

The antibody bound and prevented ACE2-binding in the case of both wild type and N501Y Spike ectodomain variants. The VH-only version of the antibody was shown to bind RBD in both the “up” and “down” positions.

Apr/29/2021