Abstract
Disorders of hemostasis can produce innumerous problems. Polysaccharides have been studied both as anticoagulant and as procoagulant agents. A mannan with a main chain of α-(1→6)-linked-Manp units, branched at O-2 mainly by side-chains of 2-O-linked-α-Manp units was chemically sulfated, structurally characterized by NMR and GC–MS (methylation, desulfation and methylation with trideuterated iodomethane), and tested in vitro and in vivo on blood coagulation models. Chemical analyses indicate a high degree of substitution on the sulfated polysaccharide. This polymer acted as a procoagulant agent, increasing blood coagulation in normal and hemophilic plasma, activated platelet aggregation and also decreased ex vivo aPTT. Polymers such as the sulfated mannan could be a helpful source of hemostatic agents to prevent hemorrhagic states.
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