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Clinical Chemistry 34: 2426-2429, 1988;
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Clinical Chemistry, Vol 34, 2426-2429, Copyright © 1988 by American Association for Clinical Chemistry

Fibronectin concentrations in plasma in peripheral vascular disease

OS Ejim, V Fonseca, A Coumar, S Mathur, JL Bell and P Dandona
Department of Chemical Pathology and Human Metabolism, Royal Free Hospital and School of Medicine, London, U.K.

Fibronectin (Fn) concentrations were measured immunoturbidimetrically in plasma of normal subjects and patients with peripheral vascular disease (PVD) before and after venous compression, which caused Fn concentrations to increase in both normal subjects and PVD patients. Basal Fn concentrations and those after 10-min compression were not significantly different in normal subjects and PVD patients. Five minutes after the release of compression, Fn had consistently declined in normal subjects and reverted to baseline values; in contrast, in PVD patients values either increased further or decreased inconsistently. Thus the Fn concentration at 15 min was significantly (P less than 0.001) greater in PVD patients than in normal subjects. Plasma albumin concentrations, measured in parallel to ensure that changes in Fn concentrations were not nonspecific, increased to a greater extent in normal subjects than in PVD patients and reverted to normal after the removal of compression. The Fn/albumin ratio remained unchanged in normal subjects after venous compression, whereas that in PVD patients increased and remained higher, even after decompression. The sustained increase in plasma Fn concentrations and in the Fn/albumin ratio in PVD patients after venous compression may indicate endothelial injury.




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Copyright © 1988 by the American Association for Clinical Chemistry.