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  • Title: Desmopressin enhances the binding of plasma von Willebrand factor to collagen in plasmas from normal dogs and dogs with type I von Willebrand's disease.
    Author: Johnstone IB.
    Journal: Can Vet J; 1999 Sep; 40(9):645-8. PubMed ID: 10495907.
    Abstract:
    A new in vitro von Willebrand factor-collagen binding activity (vWF:CBA) assay was used to assess qualitative changes in vWF in normal dogs and dogs with Type I von Willebrand's disease (vWD) following treatment with desmopressin acetate (DDAVP). Although DDAVP induced increases in vWF antigen concentrations at 1 hour postinfusion in both normal and vWD dogs (57% and 60% increases, respectively), there were disproportionately greater increases in vWF:CBA (96% and 103% increases). These results support the hypothesis that the enhanced hemostatic activity induced by DDAVP is, at least in part, due to the selective release of more functionally active vWF multimers. The assay, as described, provides a convenient means of simultaneously assessing vWF quantity and function before and after DDAVP administration.
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