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lüll P-selectin/ PSGL-1 inhibitors versus enoxaparin in the resolution of venous thrombosis: a meta-analysis Ramacciotti E; Myers DD Jr; Wrobleski SK; Deatrick KB; Londy FJ; Rectenwald JE; Henke PK; Schaub RG; Wakefield TWThromb Res 2010[Apr]; 125 (4): e138-42BACKGROUND: P-selectin antagonism has been shown to decrease thrombogenesis and inflammation in animal models of deep venous thrombosis (DVT). OBJECTIVE: To determine the effectiveness of P-selectin inhibitors versus saline and enoxaparin in venous thrombus resolution in nonhuman primate models of venous thrombosis. METHODS: Studies reporting vein re-opening, inflammation expressed as Gadolinium enhancement and coagulation parameters were searched in the literature and pooled into a meta-analysis using an inverse variance with random effects. RESULTS: Five studies were identified comparing P-selectin/ PSGL-1 inhibitors versus saline or enoxaparin regarding venous thrombosis resolution. Vein re-opening was significantly higher on P-selectin/ PSGL-1 compounds, when compared to saline (Inverse Variance [IV] 95% CI; 44.37 [17.77-70.96], p=0.001, I(2)=97%) and similar to enoxaparin (IV 95% CI; 5.03 [-8.88-18.95], p=0.48, I(2)=41%). Inflammation, reflected as Gadolinium enhancement at magnetic resonance venography (MRV), was significantly decreased in the P-selectin treated group when compared to saline (IV 95% CI; -17.84 [-14.98-(-8.30)], p<0.00001, I(2)=80%). No significant differences on vein wall inflammation were observed between P-selectin/ PSGL-1 inhibitors and enoxaparin treated animals (IV95% CI; -3.59 [-10.67-3.48], p=0.32, I(2)=66%). In addition, there was no differences in the coagulation parameters (aPTT, TCT, BT, D-Dimer, fibrinogen, platelets) between P-selectin/ PSGL-1 inhibitors and enoxaparin (IV 95% CI; -1.12[-2.36-0.11], p=0.07, I(2)=92%), although there was a trend showing less of a prolongation in TCT with P-selectin/PSGL-1 inhibitors compared to enoxaparin (p<0.0001). CONCLUSION: P-selectin antagonism successfully paralleled the low-molecular-weight-heparin enoxaparin, for the treatment of DVT in nonhuman primate models, by decreasing both thrombus burden and inflammation without causing any bleeding complications and without increasing coagulation times.|Animals[MESH]|Blood Coagulation Tests[MESH]|Blood Coagulation/drug effects/immunology[MESH]|Blood Platelets/drug effects/immunology/pathology[MESH]|Enoxaparin/immunology/*pharmacology[MESH]|Fibrin Fibrinogen Degradation Products/metabolism[MESH]|Gadolinium/pharmacology[MESH]|Hemorrhage/complications/drug therapy/immunology[MESH]|Heparin, Low-Molecular-Weight/immunology/pharmacology[MESH]|Inflammation/complications/drug therapy/immunology[MESH]|Magnetic Resonance Angiography/adverse effects[MESH]|P-Selectin/*drug effects/*immunology/pharmacology[MESH]|Partial Thromboplastin Time[MESH]|Phlebography/adverse effects[MESH]|Rats[MESH]|Selectins/immunology/pharmacology[MESH]|Thrombin Time[MESH]|Thrombosis/complications/*drug therapy/immunology[MESH]|Veins/drug effects/immunology/pathology[MESH]|Venous Thrombosis/blood/etiology/*pathology[MESH] |