Summary
Background
P-selectin antagonism decreases thrombosis and inflammation in animal models of venous
thrombosis (VT) prophylaxis. This study defines results using a P-selectin receptor
antagonist for VT treatment.
Methods
Eight juvenile baboons underwent 6 h of iliofemoral venous stasis to produce an occlusive
VT. Two days later, animals were treated for 14 days with rPSGL-Ig, 4 mg/kg (n3),
LMWH (n2) or saline (n3) and treatment continued weekly (rPSGL-Ig) or daily (LMWH,
saline). The animals were examined and sacrificed 14 days after treatment initiation
(n4) or on day 90 (n4).
Results
Percent spontaneous vein reopening revealed a significant increase (p <0.05) in the
proximal iliac vein in rPSGL-Ig and LMWH animals compared to controls (62%, 70% vs
8%), without differences in inflammation. No anticoagulation, thrombocytopenia, or
wound complications were found in rPSGL-Ig animals. At 90 days, recanalization with
iliac vein valve competence was found in treated animals.
Conclusion
rPSGLIg successfully treated established VT without anticoagulation.
Keywords
Venous thrombosis - rPSGL-Ig - P-selectin - inflammation - recanalization