Heparin is the most frequently used drug for the prevention and treatm
ent of thrombosis. Its use, however, is restricted by its side-effects
. To study the efficacy of other glycosaminoglycans that could substit
ute heparin in the management of arterial thrombosis, 60 guinea-pigs w
ere randomly allocated into 6 groups: G1= control, G2= heparin (150 IU
/kg), G3= heparan sulfate from beef pancreas (2.5 mg/kg), G4= heparan
sulfate from beef lung (2.5 mg/kg), G5= N-acetylated heparan from beef
pancreas, G6= dermatan sulfate from beef intestine (2.5 mg/kg). Ten m
inutes after intravenous injection of the drugs, thrombosis was induce
d by the injection of a 50% glucose solution into a segment of the rig
ht carotid artery isolated between 2 thread loops during 10 minutes. T
hree hours later the artery was re-exposed and if a thrombus was prese
nt it was measured, withdrawn and weighed. Thrombin time and activated
partial thromboplastin time were measured in all animals. Thrombus de
veloped in 90% of the animals in the control group, 0% in G2 and G3, 6
2.5% in G4, 87.5% in G5 and G6. Only in the animals treated with hepar
in the coagulation tests were prolonged. In conclusion, in the used do
se only the heparan sulfate from beef pancreas presented an antithromb
otic effect similar to heparin in this experimental model.