Summary
The important roles of thrombin in the development and propagation of thrombosis are well recognized. In addition to being the enzyme for clotting fibrinogen (the major protein component of blood clots), thrombin accelerates its own generation by activating factor V, factor VIII, factor XI and platelets. It accelerates the stabilization of clots by activating factor XIII to factor XIIIa, the enzyme which crosslinks fibrin. There are probably two major pathways for regulating the availability of thrombin in vivo: inactivation of thrombin (by antithrombin III/vessel wall heparan sulfate and perhaps by other endogenous antithrombins) and the inactivation of factor Va and factor VIIIa by activated protein C. Factor Va and factor VIIIa accelerate the production of thrombin. However, when thrombin becomes bound to fibrin (in clots or possibly on cell surfaces), the ability of antithrombin III/heparin to inactivate thrombin is then reduced significantly. Impairment by fibrin of thrombin inhibition by antithrombin III may account in part for the inability of unfractionated heparin to prevent post-operative deep vein thrombosis in up to 20% of patients who undergo major elective orthopaedic surgery, and may also explain the need for oral anticoagulants after unfractionated and low molecular weight heparins are used to initiate the treatment of established deep vein thrombi. The ineffectiveness of the antithrombin III/heparin pathway for inhibiting thrombin under some circumstances has been a contributory factor for the development, evaluation and identification of other inhibitors of thrombin which are more able than antithrombin III/heparin to inactivate thrombin when the enzyme is bound to fibrin. The focus of this review is to detail how these synthetic agents, by directly or indirectly inactivating thrombin, can also effectively inhibit prothrombin activation in vitro.
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References
D.A. Lane, I.R. MacGregor, R. Michalski, and V.V. Kakkar, Anticoagulant activities of four unfractionated and fractionated heparins, Thromb. Res. 12: 257 (1978).
F.A. Ofosu, and T.W. Barrowcliffe, Mechanisms of action of low molecular weight heparin and heparinoids, Balliere’s Clinical Haematology 3: 505 (1990).
F.A. Fernandez, M.R. Buchanan, J. Hirsh, J.W. Fenton II, and F.A. Ofosu, Catalysis of thrombin inhibition provides an index for estimating antithrombotic potential of glycosaminoglycans in rabbits, Thromb. Haemostas. 57: 286 (1987).
F.A. Ofosu, M.R. Buchanan, N. Anvari, L.M. Smith, and M.A. Blajchman, Plasma anticoagulant mechanism of heparin, heparan sulphate and dermatan sulphate, Ann. N.Y. Acad. Sci. 556: 123 (1989).
J. Bogaty-Yver, and M. Samama, Thrombin-antithrombin III complexes for the detection of postoperative hypercoagulable state in surgical patients receiving heparin prophylaxis, Thromb. Haemostas. 61: 538 (1989).
J.A. Hoeck, M.T. Normohamed, J.W. ten Cate, H.R. Buller, H.C. Knipscheer, H.I. Hamelynck, R.I. Marti, and Stark. Thrombin-antithrombin III complexes in the prediction of deep vein thrombosis following total hip replacement, Thromb. Haemostas. 62: 1050 (1989).
F.A. Ofosu, Prophylactically effective doses of Enoxaparin and heparin inhibit prothrombin activation, in: Heparin and Related Polysaccharides, D.A. Lane, and U. Lindahl, ed. Plenum Press pp. 231–236 (1992).
V.V. Kakkar, and W.J.G. Murray, Anticoagulant effect of two types of low molecular weight heparin administered subcutaneously, Br. J. Surg. 72: 786 (1985).
P. Berquist, U. Hedner, E. Sjorin, and E. Holmer, Efficacy and safety of low molecular weight heparin (CY216) in preventing postoperative venous thromboembolism: a cooperative study, Thromb. Res, 32: 381 (1983).
M. Holler, U. Schoch, P. Buchanan, F. Largiaden, A. von Felton, P.G. Frick, Low molecular weight heparin (KABI 2165) as thromboprophylaxis in elective visceral surgery. A randomized double blind study versus unfractionated heparin, Thromb. Haemostas. 56: 243 (1986).
A.G.G. Turpie, M.N. Levine, J. Hirsh, C.J. Carter, R.M. Jay, P.J. Powers, M. Andrew, R.P. Hull, and M. Gent, A randomized controlled trial of PK 10169 low molecular weight heparin for the prevention of deep vein thrombosis in patients undergoing elective hip surgery, N. Engl. J. Med. 315: 925 (1987).
A. Planes, N. Vochelle, J. Ferry, D. Pryzrowski, J. Clerc, M. Fayola, M. Planes, Enoxaparine low molecular weight heparin: its use in the prevention of deep vein thrombosis following total hip replacement, Haemostasis 16: 152 (1986).
R.P. Hull, T. Delorme, E. Genton, J. Hirsh, M. Gent, D. Sackett, P. McLaughlin, and P. Armstrong, Warfarin sodium versus low-dose heparin in the long term treatment of venous thrombosis, N. Engl. J. Med. 301: 855 (1979).
J.R. Leclerc, W. Geerts, L. Desjardins, F. Jobin, F. Laroche, F. Delorme, S. Haviernick, S. Atkinson, and J. Bourgouin, Prevention of deep vein thrombosis after major knee surgery. A randomized, double-blind trial comparing a low molecular weight heparin fragment (Enoxaparin) with placebo, Thromb. Haemostas. 67: 417 (1992).
C.I. Lagerstedt, C.G. Olsson, B.O. Fagher, B.W. Oquist, and U. Albrechtsson, Need for long-term anticoagulation in symptomatic calf vein thrombosis, Lancet ii 515 (1985).
W. Coon, and P. Willis, Recurrence of venous thromboembolism, Surgery 73: 823 (1973).
J. Van Ryn-McKenna, F.A. Ofosu, E. Grey, J. Hirsh, and M.R. Buchanan, Effects of dermatan sulphate and heparin on inhibition of thrombus growth in vivo, Ann. N.Y. Acad. Sci. 556: 304 (1989).
J.L. Okwusidi, M. Falcone, J. Van Ryn-McKenna, J. Hirsh, F.A. Ofosu, and M.R. Buchanan, Fibrin moderates the catalytic action of heparin but not that of dermatan sulphate on thrombin inhibition in human plasma, Thromb. Haemorrh. Dis. 1: 77 (1990).
P.J. Hogg, and C.M. Jackson, Fibrin monomer protects thrombin from inactivation by heparin-antithrombin III: implications for heparin efficacy. Proc. Natl. Acad. Sci. (USA) 86: 3619 (1989).
P.J. Hogg, and C.M. Jackson, Heparin promotes the binding of thrombin to fibrin polymer. Quantitative characterization of a thrombin-fibrin polymer - heparin ternary complex, J. Biol. Chem. 265: 245 (1990).
J.I. Weitz, M. Huboda, D. Massel, J. Maraganore, and J. Hirsh, J. Clot-bound thrombin is protected from heparin-antithrombin III but is susceptible to inactivation by antithrombin III-independent inhibition, J. Clin. Invest. 86: 385 (1990).
J.L. Okwusidi, N. Anvari, M. Kulcycky, M.A. Blajchman, M.R. Buchanan, and F.A. Ofosu, J. Lab. Clin. Med. 117: 359 (1991).
D.E. Bagdy, E. Barabas, L. Graf, T.E. Peterson, and S. Magnusson, Hirudin, Methods Enzymol. 45: 669 (1976).
R.P. Harvey, E. Dagryse, L. Stefan, L. Schamber, J.P. Cazeneve, M. Courtney, P. Tobstoskey, and J.P. Lecocg, Cloning and expression of cDNA coding for the anticoagulant hirudin from the bloodsucking leech, Hirudo medicinales, Proc. Nat. Acad. Sci. USA 83: 1084 (1986).
E. Degryse, M. Acker, A. Bernt, J.P. Maffrand, C.R. Roitsch, and M. Courtney, Point mutation modifying the thrombin inhibition kinetics and antithrombotic activity in vivo of recombinant hirudin, Prot. Engin. 2: 459 (1989).
J.L. Krstenansky, and S.J. Mao, C-terminus of hirudin using synthetic unsulfated Na acetyl-hirudin 45–65, FEBS Lett. 211: 10 (1987).
S.J.T. Mao, M.T. Yates, T.J. Owen, and J.L. Krstenansky, Interaction of hirudin with thrombin: identification of a minimal binding domain of hirudin that inhibits clotting activity, Biochemistry 27: 8170 (1988).
J. DiMaio, B. Gibbs, D. Munn, J. Lefebvre, F. Ni, and Y. Konishi, Bifunctional thrombin inhibitors based on the sequence of hirudin45–65, J. Biol. Chem. 265: 21698 (1990).
P. Bourdon, J.W. Fenton II, and J.M. Maraganore, Affinity labelling of lysine-149 in the anion binding exosite of human a-thrombin with a Na-dinitro fluorobenzyl - hirudin C-terminal peptide, Biochemistry 29: 6379 (1990).
J.M. Maraganore, B. Chao, M.L. Joseph, J. Jablonski, K.L. Ramachandran, and J.W. Fenton II, Design and characterization of hirulogs: novel class of bivalent peptide inhibition of thrombin, Biochemistry 29: 7095 (1990).
T. Kline, C. Hammond, P. Bourdon, and J.M. Maraganore, Hirulog peptides with scissile bond replacement resistent to thrombin cleavage, Biochem. Biophys. Res. Commun. 177: 1049 (1991).
J. DiMaio, F. Ni, B. Gibbs, and Y. Konishi, A new class of potent thrombin inhibitor that incorporates a scissile pseudopeptide bond, FEBS Letts 282: 47 (1991).
S. Bajusz, E. Barabas, P. Tolnag, E. Szell, and D. Bagdy, Inhibition of thrombin and trypsin by tripeptide aldehyde, Int. J. Pept. Prot. Res. 12: 217 (1978).
C. Kettner, L. Merginger, and R. Knabb, The selective inhibition of thrombin by peptides of boroarginine, J. Biol. Chem. 265: 18289 (1990).
R. Kikumoto, Y. Tanao, T. Tezuka, S. Tonomura, M. Mara, K. Ninomiya, A. Hijikata, and S. Okamoto, Selective inhibition of thrombin by (2R,4R)-4-methyl-1-(N2-((3-methyl-1,2,3,4-tetrahydro-8-quinolinyl)sulfonyl)-L-arginyl)-2-piperidinecarboxylic acid), Biochemistry 23: 85 (1984).
D.M. Tollefsen, C.A. Pestka, M.J. Monafo, Activation of heparin cofactor II by dermatan sulfate, J. Biol. Chem. 258: 6713 (1984).
F.A. Ofosu, G.J. Modi, L.M. Smith, A.L. Cerskus, J. Hirsh, and M.A. Blajchman, Heparan sulphate and dermatan sulphate inhibit the generation of thrombin activity in plasma by complementary pathways, Blood 64: 742 (1984).
F.A. Ofosu, M.A. Blajchman, G.J. Modi, L.M. Smith, M.R. Buchanan, and J. Hirsh, The importance of thrombin inhibition for the expression of the anticoagulant activity of heparin, dermatan sulphate, low molecular weight heparin and pentosan polysulphate, Br. J. Haematol. 60: 695 (1985).
W. Raake, R.J. Klausen, E. Meintsberger, P. Zeller, and H. Elting, Pharamcologic profile of the antithrombotic and bleeding actions of sulfated lactobionic acid amides, Sem. Thromb. Haemost. 17:Suppl 1. 129 (1991).
F.A. Ofosu, J. Fareed, L.M. Smith, N. Anvari, D. Hoppensteadt, and M.A. Blajchman, Eur. J. Biochem. 203: 121 (1992).
J.W. Fenton II, J.I. Witting, C. Pouliott, and J. Fareen, Anion binding site exosite interactions with heparin and various polyanions, Ann. N.Y. Acad. Sci. 556: 158 (1989).
J.I. Witting, P. Bourdon, D.X. Brezniak, J. Maraganore, and J.W. Fenton II, Thrombin specific inhibition by and slow cleavage of Hirulog-1, Biochem. J. 283: 737 (1992).
R.E. Jordan, G.M. Oosta, W.T. Gardner, and R.D. Rosenberg, The kinetics of haemostatic enzyme antithrombin interactions in the presence of low molecular weight heparin, J. Biol. Chem. 255: 10081 (1980).
D.M. Tollefsen, D.W. Majerus, and M.K. Blank, Heparin cofactor II. Purification and properties of a heparin-dependent inhibitor of thrombin in human plasma, J. Biol. Chem. 257: 2162 (1982).
E.W. Davie, K. Fujikawa, and W. Kisiel, The coagulation cascade: initiation, maintenance and reguation, Biochemistry 30: 10363 (1991).
F.A. Ofosu, J. Hirsh, C.T. Esmon, G.J. Modi, L.M. Smith, N. Anvari, M.R. Buchanan, J.W. Fenton II, and M.A. Blajchman, Unfractionated heparin inhibits the thrombin-catalyzed amplification reactions of coagulation more efficiently than those catalyzed by factor Xa, Biochem. J. 257: 143 (1989).
F.A. Ofosu, J. Choay, N. Anvari, L.M. Smith, and M.A. Blajchman, Inhibition of factor X and factor V activation by dermatan sulphate and a pentasaccharide with high affinity for antithrombin III in human plasma, Eur. J. Biochem. 193: 485 (1990).
X. Yang, M.A. Blajchman, S. Craven, L.M. Smith, N. Anvari, and F.A. Ofosu, Activation of factor V during intrinsic and extrinsic coagulation. Inhibition by heparin, hirudin and D-Phe-Pro-Arg CHZCP, Biochem. J. 272: 399 (1990).
D.D. Monkovic, and P.B. Tracy, Activation of human factor V by factor Xa and thrombin, Biochemistry 29: 1118 (1990).
E. Marcianiak, Factor Xa inactivation by antithrombin III. Evidence for biological stabilization of factor Xa by factor V-phospholopid complexes, Br. J. Haematol. 24: 391 (1973).
P.N. Walsh, R. Biggs, and G. Gagnatelli, Platelet antiheparin activity. Assay based on factor Xa inactivation by heparin and antifactor Xa, Br. J. Haematol. 26: 405 (1974).
T.W. Barrowcliffe, F.J. Havercroft, G. Kemball-Cook, and U. Lindahl, The effect of Ca’, phospholipid and factor V on the antifactor Xa activity of heparin and its high affinity oligosaccharide, Biochem. J. 243: 31 (1987).
F.A. Ofosu, J.W. Fenton II, J. Maraganore, M.A. Blajchman, X. Yang, L. Smith, N. Anvari, M.R. Buchanan, and J. Hush, Biochem. J. 283: 893 (1992).
J.A. Koedam, R.I. Hamer, N.H. Beeser-Visser, B.N. Bouman, and J.J. Sixma, The effect of von Willebrand factor on activation of factor VIII by factor Xa, Eur.J. Biochem. 189: 229 (1991).
C.T. Esmon, The regulation of natural anticoagulant pathways, Science 235: 1348 (1987).
G.J. Broze, T.J. Guard, and W.F. Novotny, Regulation of coagulation by a multivalent Kunitz-type inhibitor, Biochemistry 29: 7541 (1990).
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Ofosu, F.A. (1993). Mechanisms for the Anticoagulant Effects of Synthetic Antithrombins. In: Claeson, G., Scully, M.F., Kakkar, V.V., Deadman, J. (eds) The Design of Synthetic Inhibitors of Thrombin. Advances in Experimental Medicine and Biology, vol 340. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-2418-6_19
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