title: Anticoagulant activity of sulfoalkyl derivatives of curdlan.
abstract: Curdlan is a natural beta-1,3-glucan produced by Agrobacterium biovar 1. In this study, the anticoagulant activity of sulfoalkyl derivatives of curdlan was investigated by carrying out activated partial thromboplastin time (APTT) assay and compared with that of o-sulfonated curdlan. Approximately 100-fold higher concentration of o-sulfonated curdlan than heparin was required to obtain the same level of the clotting time. Anticoagulant activity of curdlan derivatives was dependent on the degree of sulfation in prolonging the clotting time. However, the chain length of the substituent did not play a role in prolonging the clotting time. The curdlan derivatives enhanced thrombin inhibition by mediating through antithrombin III. The inhibition of thrombin by o-sulfonated curdlan was found to be approximately 10-fold weaker than that by heparin.
authors.affiliation: Department of Biochemistry, College of Medicine, Konyang University, Nonsan, Chungnam, Korea. kyunglee@kytis.konyang.ac.kr
authors.forename: K B
authors.initials: KB
authors.lastname: Lee
authors.forename: J H
authors.initials: JH
authors.lastname: Bae
authors.forename: J S
authors.initials: JS
authors.lastname: Kim
authors.forename: Y C
authors.initials: YC
authors.lastname: Yoo
authors.forename: B S
authors.initials: BS
authors.lastname: Kim
authors.forename: S T
authors.initials: ST
authors.lastname: Kwak
authors.forename: Y S
authors.initials: YS
authors.lastname: Kim
mesh_terms: D000925:Anticoagulants / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D001777:Blood Coagulation / Q000187:drug effects; D004587:Electrophoresis, Agar Gel; D005936:Glucans / Q000737:chemistry* / Q000494:pharmacology*; D006801:Humans; D066298:In Vitro Techniques; D009682:Magnetic Resonance Spectroscopy; D008970:Molecular Weight; D011516:Prothrombin / Q000037:antagonists & inhibitors; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared; D013455:Sulfur / Q000737:chemistry; D047071:beta-Glucans
chemical_list: D000925:Anticoagulants; D005936:Glucans; D047071:beta-Glucans; C038459:curdlan; D013455:Sulfur; D011516:Prothrombin