Cellular and serum protein anchors for modulating pharmacokinetics
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United States of America Patent
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Dec 1, 1998
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app pub date -
Aug 14, 1996
filing date -
Oct 3, 1990
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Abstract
Novel bifunctional reagents useful in reducing the biological effect of an undesirable blood-borne agent are provided. The reagents comprise conjugates of a first binding member specific for a blood-borne agent having a detrimental biological activity in a mammalina host, such as a growth factor, coagulation factor, enzyme, toxin, drug of abuse, microbe, autoreactive immune cell, infected or tumorous cell, joined to an second binding member specific for an anchor, where the anchor is a long-lived blood component, including cells, such as a erythrocyte, platelet or endothelial cell and serum proteins, such as albumin, ferritin, or steroid binding proteins. These conjugates find therapeutic use by coupling the agent and the blood component and thereby reducing the biological activity or effective concentration of free agent, modulating the volume of distribution of the agent, targeting the agent to sites of enhanced immune response, or facilitating agent clearance from the bloodstream.
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