PMID- 11057859 OWN - NLM STAT- MEDLINE DCOM- 20010222 LR - 20141120 IS - 0340-6245 (Print) IS - 0340-6245 (Linking) VI - 84 IP - 4 DP - 2000 Oct TI - Pre-clinical pharmacological profile of the novel glycoconjugate Org 36764 with both factor Xa and thrombin (IIa) inhibitory activities. PG - 611-20 AB - Org 36764, is an antithrombin III (AT) and thrombin binding carbohydrate, which accelerates the inactivation of both factor Xa and thrombin by AT. It displays in buffer an anti-Xa and anti-thrombin activity of 415 and 2 U/mg, respectively, compared to 172 and 114 U/mg, respectively, for unfractionated heparin (UFH), Org 36764 does not cross-react with HIT (heparin induced thrombocytopenia) antibodies and is not neutralised by PF4. In experimental models in rats, on a molar basis. Org 36764 was more active than the pentasaccharide SanOrg 34006 (= AT binding domain of Org 36764) in arterial thrombosis, but both were equally active in venous thrombosis. In arterial thrombosis following endothelial damage by ferric chloride, Org 36764 was more active than the LMW heparin enoxaparin and SanOrg 34006 and similar active to UFH. At AT saturating doses the bleeding enhancement was not more than 3.5 times the control value. Org 36764 was more active in suppressing in vivo thrombus formation on stents than UFH. SanOrg 34006 or a combination of ticlopidine and aspirin. The results indicate that the novel drug Org 36764 is a drug with antithrombotic potential against venous and arterial thrombosis. FAU - Vogel, G M AU - Vogel GM AD - Department of Pharmcology, Scientific Development Group N.V. Organon, Oss, The Netherlands. g.vogel@organon.oss.akzonobel.nl FAU - van Amsterdam, R G AU - van Amsterdam RG FAU - van Dinther, T G AU - van Dinther TG FAU - Tromp, M AU - Tromp M FAU - Meuleman, D G AU - Meuleman DG LA - eng PT - Journal Article PL - Germany TA - Thromb Haemost JT - Thrombosis and haemostasis JID - 7608063 RN - 0 (Anticoagulants) RN - 0 (Carbohydrates) RN - 0 (Factor Xa Inhibitors) RN - 0 (Glycoconjugates) RN - 0 (Org 36764) RN - 9000-94-6 (Antithrombin III) RN - EC 3.4.21.5 (Thrombin) SB - IM MH - Animals MH - Anticoagulants/*pharmacology/therapeutic use MH - Antithrombin III/*pharmacology/therapeutic use MH - Carbohydrates/pharmacology MH - *Factor Xa Inhibitors MH - Glycoconjugates/*pharmacology/therapeutic use MH - Male MH - Rats MH - Rats, Wistar MH - Thrombin/*antagonists & inhibitors MH - Thrombosis/*drug therapy EDAT- 2000/11/01 11:00 MHDA- 2001/03/03 10:01 CRDT- 2000/11/01 11:00 PHST- 2000/11/01 11:00 [pubmed] PHST- 2001/03/03 10:01 [medline] PHST- 2000/11/01 11:00 [entrez] AID - 00100611 [pii] PST - ppublish SO - Thromb Haemost. 2000 Oct;84(4):611-20.