PMID- 15140128 OWN - NLM STAT- MEDLINE DCOM- 20050114 LR - 20230829 IS - 1538-7933 (Print) IS - 1538-7836 (Linking) VI - 2 IP - 6 DP - 2004 Jun TI - Activity of a synthetic hexadecasaccharide (SanOrg123781A) in a pig model of arterial thrombosis. PG - 925-30 AB - The activity of SanOrg123781A, a new synthetic antithrombotic drug inhibiting both factor Xa and thrombin through antithrombin (AT), was compared to that of unfractionated heparin (UFH) and of the synthetic pentasaccharide (fondaparinux, SP) in an ex vivo arterial thrombosis model in the pig. Six groups of four pigs were administered intravenously with SanOrg123781A (1, 3, 10 and 30 nmol kg(-1)), UFH (30 nmol kg(-1)) or SP (30 nmol kg(-1)). In this arterial model in which platelet thrombus was formed on a thrombogenic surface under a constant high shear rate, UFH and SP had moderate antithrombotic effects while SanOrg123781A exhibited a strong, dose-dependent inhibitory activity on platelet adhesion and platelet thrombus formation. In contrast to UFH, SanOrg123781A did not modify the activated partial thromboplastin time (aPTT) even at 30 nmol kg(-1), but strongly inhibited thrombin generation. At the same dose, despite a lower antithrombotic activity than SanOrg123781A, UFH significantly affected all the coagulation parameters. Taken together, these results show that SanOrg123781A, due to its potent and selective antifactor Xa and antifactor IIa activities is a promising new antithrombotic agent even in arterial setting. FAU - Bal dit Sollier, C AU - Bal dit Sollier C AD - Laboratoire de Thrombose et d'Atherosclerose, IVS-INSERM Hopital Lariboisiere, Paris and INRA, Jouy en Josas, France. claire.bal@lrb.ap-hop-paris.fr FAU - Kang, C AU - Kang C FAU - Berge, N AU - Berge N FAU - Herault, J P AU - Herault JP FAU - Bonneau, M AU - Bonneau M FAU - Herbert, J M AU - Herbert JM FAU - Drouet, L AU - Drouet L LA - eng PT - Comparative Study PT - Journal Article PL - England TA - J Thromb Haemost JT - Journal of thrombosis and haemostasis : JTH JID - 101170508 RN - 0 (Factor Xa Inhibitors) RN - 0 (Polysaccharides) RN - 0 (SanOrg 123781) RN - 9001-26-7 (Prothrombin) RN - 9002-04-4 (Factor IIa) RN - 9005-49-6 (Heparin) RN - J177FOW5JL (Fondaparinux) SB - IM MH - Animals MH - Blood Platelets/drug effects MH - Disease Models, Animal MH - Dose-Response Relationship, Drug MH - Drug Evaluation, Preclinical MH - Factor Xa Inhibitors MH - Fondaparinux MH - Heparin/administration & dosage/pharmacokinetics/pharmacology MH - Partial Thromboplastin Time MH - Polysaccharides/administration & dosage/*pharmacokinetics/pharmacology MH - Prothrombin/antagonists & inhibitors MH - Swine MH - Thrombosis/*drug therapy/prevention & control EDAT- 2004/05/14 05:00 MHDA- 2005/01/15 09:00 CRDT- 2004/05/14 05:00 PHST- 2004/05/14 05:00 [pubmed] PHST- 2005/01/15 09:00 [medline] PHST- 2004/05/14 05:00 [entrez] AID - S1538-7836(22)15797-1 [pii] AID - 10.1111/j.1538-7836.2004.00719.x [doi] PST - ppublish SO - J Thromb Haemost. 2004 Jun;2(6):925-30. doi: 10.1111/j.1538-7836.2004.00719.x.