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Last Updated: August 12, 2020

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Claims for Patent: 9,757,437

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Summary for Patent: 9,757,437
Title:Kallikrein inhibitors and anti-thrombolytic agents and uses thereof
Abstract: Methods, kits and compositions are described that include a non-naturally occurring kallikrein inhibitor and an anti-thrombolytic agent, e.g., an anti-fibrinolytic agent, for preventing or reducing blood loss and/or ischemia, e.g., ischemia associated with perioperative blood loss and cerebral ischemia, the onset of systemic inflammatory response, and/or reperfusion injury, e.g., reperfusion injury associated with cerebral ischemia or a focal brain ischemia, e.g., in patients subjected to invasive surgical procedures, especially procedures requiring cardiopulmonary bypass.
Inventor(s): Blair; Henry (Boston, MA), Beck; Thomas (Concord, MA), Ladner; Robert Charles (Ijamsville, MD)
Assignee: Dyax Corp. (Burlington, MA)
Application Number:14/271,105
Patent Claims:1. A method for inhibiting or reducing the onset of systemic inflammatory response associated with a surgical procedure in a patient comprising administering to the patient a non-naturally occurring kallikrein inhibitor polypeptide in combination with an anti-thrombolytic agent, wherein the polypeptide comprises the amino acid sequence: Xaa1 Xaa2 Xaa3 Xaa4 Cys Xaa6 Xaa7 Xaa8 Xaa9 Xaa10 Xaa11 Gly Xaa13 Cys Xaa15 Xaa16 Xaa17 Xaa18 Xaa19 Xaa20 Xaa21 Xaa22 Xaa23 Xaa24 Xaa25 Xaa26 Xaa27 Xaa28 Xaa29 Cys Xaa31 Xaa32 Phe Xaa34 Xaa35 Gly Gly Cys Xaa39 Xaa40 Xaa41 Xaa42 Xaa43 Xaa44 Xaa45 Xaa46 Xaa47 Xaa48 Xaa49 Xaa50 Cys Xaa52 Xaa53 Xaa54 Cys Xaa56 Xaa57 Xaa58 (SEQ ID NO: 1), wherein Xaa1, Xaa2, Xaa3, Xaa4, Xaa56, Xaa57 or Xaa58 are each individually an amino acid or absent; Xaa6, Xaa7, Xaa8, Xaa9, Xaa20, Xaa24, Xaa25, Xaa26, Xaa27, Xaa28, Xaa29, Xaa41, Xaa42, Xaa44, Xaa46, Xaa47, Xaa48, Xaa49, Xaa50, Xaa52, Xaa53 and Xaa54 are each any amino acid; Xaa10 is Asp; Xaa11 is Asp; Xaa13 is Pro; Xaa15 is Arg; Xaa16 is Ala; Xaa17 is Ala; Xaa18 is His; Xaa19 is Pro; Xaa21 is Trp; Xaa22 is an amino acid selected from the group consisting of: Tyr and Phe; Xaa23 is an amino acid selected from the group consisting of: Tyr and Phe; Xaa31 is Glu; Xaa32 is Glu; Xaa34 is Ile; Xaa35 is Tyr; Xaa39 is Glu; Xaa40 is an amino acid selected from the group consisting of: Gly and Ala; Xaa43 is an amino acid selected from the group consisting of: Asn and Gly; Xaa45 is an amino acid selected from the group consisting of: Phe and Tyr; and wherein the polypeptide inhibits kallikrein.

2. The method of claim 1, wherein the surgical procedure is a cardiothoracic surgery.

3. The method of claim 2, wherein the cardiothoracic surgery is cardiopulmonary bypass or coronary artery bypass grafting.

4. The method of claim 1, wherein the polypeptide comprises: Met His Ser Phe Cys Ala Phe Lys Ala Asp Asp Gly Pro Cys Arg Ala Ala His Pro Arg Trp Phe Phe Asn Be Phe Thr Arg Gln Cys Glu Glu Phe Be Tyr Gly Gly Cys Glu Gly Asn Gln Asn Arg Phe Glu Ser Leu Glu Glu Cys Lys Lys Met Cys Thr Arg Asp (amino acids 3-60 of SEQ ID NO:2).

5. The method of claim 4, wherein the polypeptide further comprises a Glu-Ala sequence prior to the Met residue.

6. The method of claim 1, wherein the anti-thrombolytic agent is an antifibrinolytic agent.

7. The method of claim 6, wherein the anti-fibrinolytic agent is selected from the group consisting of: tranexamic acid, epsilon amino caproic acid, aprotinin, desmopressin, pirfenidone, and combinations thereof.

8. A method for inhibiting or reducing cerebral ischemia or reperfusion injury in a patient comprising administering to the patient a non-naturally occurring kallikrein inhibitor polypeptide in combination with an anti-thrombolytic agent, wherein the polypeptide comprises the amino acid sequence: Xaa1 Xaa2 Xaa3 Xaa4 Cys Xaa6 Xaa7 Xaa8 Xaa9 Xaa10 Xaa11 Gly Xaa13 Cys Xaa15 Xaa16 Xaa17 Xaa18 Xaa19 Xaa20 Xaa21 Xaa22 Xaa23 Xaa24 Xaa25 Xaa26 Xaa27 Xaa28 Xaa29 Cys Xaa31 Xaa32 Phe Xaa34 Xaa35 Gly Gly Cys Xaa39 Xaa40 Xaa41 Xaa42 Xaa43 Xaa44 Xaa45 Xaa46 Xaa47 Xaa48 Xaa49 Xaa50 Cys Xaa52 Xaa53 Xaa54 Cys Xaa56 Xaa57 Xaa58 (SEQ ID NO: 1), wherein Xaa1, Xaa2, Xaa3, Xaa4, Xaa56, Xaa57 or Xaa58 are each individually an amino acid or absent; Xaa6, Xaa7, Xaa8, Xaa9, Xaa20, Xaa24, Xaa25, Xaa26, Xaa27, Xaa28, Xaa29, Xaa41, Xaa42, Xaa44, Xaa46, Xaa47, Xaa48, Xaa49, Xaa50, Xaa52, Xaa53 and Xaa54 are each any amino acid; Xaa10 is Asp; Xaa11 is Asp; Xaa13 is Pro; Xaa15 is Arg; Xaa16 is Ala; Xaa17 is Ala; Xaa18 is His; Xaa19 is Pro; Xaa21 is Trp; Xaa22 is an amino acid selected from the group consisting of: Tyr and Phe; Xaa23 is an amino acid selected from the group consisting of: Tyr and Phe; Xaa31 is Glu; Xaa32 is Glu; Xaa34 is Ile; Xaa35 is Tyr; Xaa39 is Glu; Xaa40 is an amino acid selected from the group consisting of: Gly and Ala; Xaa43 is an amino acid selected from the group consisting of: Asn and Gly; Xaa45 is an amino acid selected from the group consisting of: Phe and Tyr; and wherein the polypeptide inhibits kallikrein.

9. The method of claim 8, wherein the polypeptide comprises: Met His Ser Phe Cys Ala Phe Lys Ala Asp Asp Gly Pro Cys Arg Ala Ala His Pro Arg Trp Phe Phe Asn Be Phe Thr Arg Gln Cys Glu Glu Phe Be Tyr Gly Gly Cys Glu Gly Asn Gln Asn Arg Phe Glu Ser Leu Glu Glu Cys Lys Lys Met Cys Thr Arg Asp (amino acids 3-60 of SEQ ID NO:2).

10. The method of claim 9, wherein the polypeptide further comprises a Glu-Ala sequence prior to the Met residue.

11. The method of claim 9, wherein the anti-thrombolytic agent is an antifibrinolytic agent.

12. The method of claim 11, wherein the anti-fibrinolytic agent is selected from the group consisting of: tranexamic acid, epsilon amino caproic acid, aprotinin, desmopressin, pirfenidone, and combinations thereof.

Details for Patent 9,757,437

Applicant Tradename Biologic Ingredient Dosage Form BLA Number Approval Date Patent No. Assignee Estimated Patent Expiration Status Orphan Source
Bayer Hlthcare TRASYLOL aprotinin INJECTABLE;INJECTION 020304 001 1994-02-07   Start Trial Dyax Corp. (Burlington, MA) 2024-09-27 DISCN search
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Number >Approval Date >Patent No. >Assignee >Estimated Patent Expiration >Status >Orphan >Source

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