
Anticoagulant and antithrombotic activity of a sulfate obtained from a glucan component of the lichen Parmotrema mantiqueirense Hale
2005; Elsevier BV; Volume: 60; Issue: 1 Linguagem: Inglês
10.1016/j.carbpol.2004.11.014
ISSN1879-1344
AutoresJuliana Curi Martinichen-Herrero, Elaine R. Carbonero, Philip A.J. Gorin, Marcello Iacomini,
Tópico(s)Lichen and fungal ecology
ResumoA β-(1→6)-linked glucan (β-G) was isolated from the lichen Parmotrema mantiqueirense Hale and was sulfated, to give a product (β-G-SO4) with 76.8% sulfate, corresponding to a degree of substitution of 1.95. Both β-G and β-G-SO4 were evaluated by its activated partial thromboplastin (APTT) and thrombin time (TT), using pooled normal human plasma, and compared with that having 140 USP units/mg (porcine intestinal mucosa heparin). Anticoagulant activity was detected for β-G-SO4, but not β-G. The in vivo antithrombotic properties of β-G-SO4 were determined using a stasis thrombosis model in Wistar rats, with an intravenous administration of 0.5 mg/kg body weight totally inhibiting thrombus formation. It caused dose-dependent increases in tail transection bleeding time. The results obtained show that this sulfated polysaccharide is a promising anticoagulant and antithrombotic agent.
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