Immunoadsorption of anti-von Willebrand factor cleaving protease antibodies
AssigneesBaxter International Inc., Baxter Healthcare S.A.
InventorsFriedrich Scheiflinger, Barbara Plaimauer, Gerhard Antoine
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Abstract
This invention relates to adsorbents and methods for highly selective removal of anti-von Willebrand Factor-cleaving protease antibodies (“anti-vWF-cp-abs”) from human plasma using human von Willebrand Factor-cleaving protease (“hvWF-cp”) or fragments thereof as affinity ligands. The adsorbents can be used for treating disorders associated with the occurrence of anti-vWF-cp-abs in patients, such as thromboembolic diseases.
Claims15
An adsorbent for selective removal of anti-von Willebrand Factor cleaving protease antibodies from human plasma, wherein the adsorbent comprise a human von-Willebrand Factor-cleaving protease fragment that consists of amino acid sequence SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3, SEQ ID NO:4 or SEQ ID NO:5 chemically coupled to an inert matrix material.
A method for selective removal of anti-von Willebrand Factor-cleaving protease antibodies from human plasma, comprising the steps of:
- (a) providing a plasma from whole blood from a patient having a disorder associated with occurrence of anti-von Willebrand Factor-cleaving protease antibodies;
- (b) subjecting said plasma to an affinity chromatography using an adsorbent comprising a human von-Willebrand Factor-cleaving protease fragment that consists of amino acid sequence SEQ ID NO:1, SEQ ID NO:2, SEQ ID NO:3, SEQ ID NO:4 or SEQ ID NO:5 chemically coupled to an inert matrix material;
- wherein the affinity chromatography is performed under physiological conditions in which the antibodies bind to human von Willebrand Factor-cleaving protease;
- and (c) collecting a flow-through fraction which is essentially devoid of anti-von Willebrand Factor-cleaving protease antibodies.
Dependencies are inferred from the claim text.