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Anticoagulants, Thrombolytic Agents and Antiplatelet Drugs. Management and Prevention of Vascular Thrombosis. Benedict R. Lucchesi, M.D., Ph.D. Department of Pharmacology University of Michigan Medical School. Revised 10/03. Anticoagulant Therapy .
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Anticoagulants, Thrombolytic Agents and Antiplatelet Drugs Management and Prevention of Vascular Thrombosis Benedict R. Lucchesi, M.D., Ph.D. Department of Pharmacology University of Michigan Medical School Revised 10/03
Anticoagulant Therapy • Areas of Concentration and Drugs to Know • Required Reading Goodman and Gilman 10 ed pages 1519-1536. • Mechanisms for hemostasis • Thrombus Formation • Role of platelets • Venous thrombosis • Arterial thrombosis • Biochemistry of coagulation • Role of vitamin K • Platelet Biology • Thrombolysis
Drugs to Know • Anticoagulants and Adjuncts • Heparin • Protamine Sulfate • Low-molecular weight heparins - • Enoxaparin (Lovenox™) • Dalteparin (Fragmin™) • Danaparoid (Orgaran™) • Lepirudin [rDNA] (Refludan™) • Bivalirudin (Hirulog, Angiomax™) • Argatroban • Danaparoid (Orgaran™)
Coumarin Derivatives • Warfarin • Dicumarol • Antiplatelet Drugs • Aspirin • Dipyridamole • Ticlopidine (Ticlid™) • Clopidogrel (Plavix™) • Abciximab (ReoPro™; Antibody to platelet GPIIb/IIIa receptor) • Tirofiban (Aggrastat™) Reversible, nonpeptide GPIIb/IIIa receptor antagonist • Eptifibatide (Integrilin™) cyclic peptide GPIIb/IIIa receptor blocker • Anagrelide (Agrylin™)
Thrombolytic Agents • Streptokinase • Tissue plasminogen activator (rt-PA) • Alteplase (Activase™) • Reteplase (Retavase™) • Tenecteplase, TNK-tPA (TNKase™) • Urokinase • Anisoylated plasminogen streptokinase activator complex (APSAC)
aPC Protein S aPC Inactivation Va & VIIIa INTRINSIC PATHWAY EXTRINSIC PATHWAY IXa VIIa / Tissue Factor VIIIa TFPI Platelet Aggregation aPC FACTOR Xa Fibrinogen ProthrombinThrombin Va XIIIa PC / Thrombomodulin Fibrin
Direct & Indirect Thrombin Inhibitors Thrombin Direct InhibitorsIndirect Inhibitors HirudinATIII HirulogHeparin ArgatrobanLMWHs Lepirudin [rDNA] -dalteparin -enoxaparin Other Agents Danaparoid Dermatan Sulfate
Anticoagulant Therapy • Reduce the formation of fibrin clots • Consist of two major types • Heparin and other Factor Xa, IIa inhibitors • LMWHs • Danaparoid • Lepirudin (Refludin™) • Bivalirudin (Angiomax™) • Argatroban • Warfarin