Summary
A panel of 10 murine monoclonal antibodies to procoagulant FVIII has been developed
from the fusion of a single spleen. Balb/c mice were injected with a purified preparation
of FVIII: Ag, and antibody production in sera and hybrid culture supernatants was
monitored using a specific radiometric screening assay. The antibodies all inhibit
FVIII clotting activity in normal plasma, and when immobilised on agarose retain their
ability to recognise and bind the FVIII procoagulant protein. Studies on protein A-purified
immunoglobulins demonstrate a range of properties within the panel of antibodies with
regard to species crossreactivity, clotting inhibition and immunoadsorption. The panel
of antibodies has been used to screen heat-treated FVIII concentrates for the occurrence
of heat-induced neoantigens.
Key words
Factor VIII - Monoclonal antibodies