[Characterization of FVIII/VW circulating after DDAVP administration (author's transl)]

These studies were designed with the purpose of providing more information relevant about the new FVIII/VW circulating after administration intranasally DDAVP. One health subject was administered 260 microliter total dose of DDAVP. The newly released FVIII/VW could not be distinguished form circulating FVIII/VW on the basis of molecular size, electrophoretic mobility or "in vitro" stability of VIII:C and VIIIR:AG despite apparent differences in the duration of response of the procoagulant and antigenic components "in vivo". FVIII/VW cryoethanol-precipitations studies showed similar increase in the high molecular weight (HMW) and low molecular weight (LMW) after DDAVP administration. This suggest a immediately polymerization in the new VIIIR:AG circulating after DDAVP administration.