Low-dose low-molecular-weight heparin is anti-inflammatory during venous thrombosis.
J Vasc Surg
; 28(5): 848-54, 1998 Nov.
Article
en En
| MEDLINE
| ID: mdl-9808852
ABSTRACT
PURPOSE:
Venous thrombosis results in a vein wall inflammatory response initiated by thrombus. Although anticoagulation with standard heparin (SH) and low-molecular-weight heparin (LMWH) is known to limit further thrombosis, their anti-inflammatory properties are poorly defined. The anti-inflammatory properties of these heparins were studied.METHODS:
Sprague-Dawley rats were divided into groups and underwent inferior vena caval (IVC) ligation just below the renal level producing IVC thrombosis. One hour before ligation, animals received subcutaneous SH or LMWH at either high or low dose; normal saline (NS) was used as control. Six hours after ligation, animals were killed, and the IVCs were analyzed for clot presence, vein wall morphometrics, and vein wall permeability (VP) to define injury.RESULTS:
Animals in both low-dose groups had no measurable anticoagulation, whereas those in both high-dose groups were adequately anticoagulated. There were statistically less IVC neutrophils for all groups compared with the control group, with low-dose LMWH showing the least cells (low-dose LMWH, 16 +/- 3; high-dose LMWH, 37 +/- 10; low-dose SH, 37 +/- 6; high-dose SH, 32 +/- 9; NS control, 63 +/- 2). Similar results were noted for total inflammatory cells. The lowest VP was noted for low-dose LMWH.CONCLUSION:
Although both SH and LMWH inhibited vein wall neutrophils and total inflammatory cells, low-dose LMWH was most effective limiting neutrophil extravasation and was the only intervention to decrease VP below control levels. This occurred without preventing thrombus formation or causing a state of anticoagulation. Low-dose LMWH possesses anti-inflammatory properties distinct from its anticoagulant properties.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Heparina de Bajo-Peso-Molecular
/
Trombosis de la Vena
/
Antiinflamatorios
/
Anticoagulantes
Tipo de estudio:
Diagnostic_studies
/
Evaluation_studies
Límite:
Animals
Idioma:
En
Revista:
J Vasc Surg
Asunto de la revista:
ANGIOLOGIA
Año:
1998
Tipo del documento:
Article
País de afiliación:
Estados Unidos