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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Glycoprotein Ib bioassays. Activity levels in Bernard-Soulier syndrome and in stored blood bank platelets.

Glycoprotein Ib (GP-Ib) is a major platelet receptor protein concerned with von Willebrand-factor binding, platelet agglutination, and platelet adhesion, and it is required for normal hemostasis. By the use of botrocetin (venom coagglutinin), both quantitative and semiquantitative assays for GP-Ib activity were developed. The latter assay uses limiting dilutions of botrocetin as a measure of GP-Ib activity. Platelets, stored up to 23 days under blood bank conditions, were assayed by the limiting dilution test. Values of GP-Ib were progressively diminished after 9 to 10 days of storage, reaching levels of less than 10% at 23 days. Platelets from a subject with Bernard-Soulier syndrome showed less than 10% GP-Ib activity. These assays appear to be a specific measure of functional GP-Ib activity, and, when combined with GP-Ib antigen measurement by other methods, they provide a means for further characterizing GP-Ib abnormalities.[1]

References

  1. Glycoprotein Ib bioassays. Activity levels in Bernard-Soulier syndrome and in stored blood bank platelets. Eaton, L.A., Read, M.S., Brinkhous, K.M. Arch. Pathol. Lab. Med. (1991) [Pubmed]
 
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