Chimeric clotting factors
First Claim
1. A chimeric protein comprising two polypeptides,wherein (A) the first polypeptide comprises (i) an activatable Factor VII (Ac) and (ii) a first Fc domain (Het1), wherein the activatable Factor VII comprises a Factor VII (FVII) zymogen comprising a heavy chain (HC), a light chain (LC), and a protease-cleavage site that is not naturally occurring in the FVII zymogen inserted between the HC and the LC;
- wherein (B) the second polypeptide comprises (i) a soluble Tissue Factor (Em) and (ii) a second Fc domain (Het2); and
wherein the chimeric protein has a higher thrombin activity compared to a reference FVII protein comprising an activated FVII (FVIIa) alone or an FVIIaFc fusion protein, as measured by a thrombin generation assay.
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Abstract
The invention provides chimeric clotting factors comprising an activatable clotting factor and an enhancer moiety. The activatable clotting factor allows the chimeric clotting factor to be activated at the site of coagulation. The enhancer moiety can additionally improve procoagulation activities of the chimeric clotting factors. The chimeric clotting factors can further be improved by fusion to a half-life extender, which improves a pharmacokinetics property of the chimeric clotting factor. The invention also includes methods of making and methods of using these chimeric clotting factors.
99 Citations
14 Claims
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1. A chimeric protein comprising two polypeptides,
wherein (A) the first polypeptide comprises (i) an activatable Factor VII (Ac) and (ii) a first Fc domain (Het1), wherein the activatable Factor VII comprises a Factor VII (FVII) zymogen comprising a heavy chain (HC), a light chain (LC), and a protease-cleavage site that is not naturally occurring in the FVII zymogen inserted between the HC and the LC; -
wherein (B) the second polypeptide comprises (i) a soluble Tissue Factor (Em) and (ii) a second Fc domain (Het2); and wherein the chimeric protein has a higher thrombin activity compared to a reference FVII protein comprising an activated FVII (FVIIa) alone or an FVIIaFc fusion protein, as measured by a thrombin generation assay. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification