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Fibronectin concentrations in plasma in peripheral vascular disease
O S Ejim1, V Fonseca, A Coumar
1Department of Chemical Pathology and Human Metabolism, Royal Free Hospital and School of Medicine, London, U.K.
Clinical Chemistry
|December 1, 1988
Summary
Plasma fibronectin (Fn) levels rise with venous compression in healthy individuals and peripheral vascular disease (PVD) patients. However, PVD patients show a sustained increase in Fn post-compression, suggesting potential endothelial injury.
Area of Science:
- Biochemistry
- Vascular Biology
- Clinical Medicine
Background:
- Peripheral vascular disease (PVD) is a condition affecting blood circulation.
- Fibronectin (Fn) is a glycoprotein involved in cell adhesion and tissue repair.
- Understanding Fn dynamics in PVD may offer insights into disease mechanisms.
Purpose of the Study:
- To investigate plasma fibronectin (Fn) concentrations in patients with peripheral vascular disease (PVD) compared to normal subjects.
- To assess the impact of venous compression and subsequent release on Fn levels and the Fn/albumin ratio in PVD and healthy individuals.
- To explore the potential of Fn changes as an indicator of endothelial injury in PVD.
Main Methods:
- Immunoturbidimetric measurement of plasma fibronectin (Fn) concentrations.
- Venous compression applied to both normal subjects and PVD patients.
- Measurement of plasma albumin concentrations to normalize Fn changes.
- Analysis of Fn and albumin levels before, during, and after venous compression and decompression.
Main Results:
- Venous compression increased Fn concentrations in both groups, with no significant difference at baseline or during compression.
- Post-decompression, Fn levels returned to baseline in normal subjects but remained elevated or inconsistently changed in PVD patients.
- The Fn/albumin ratio increased significantly in PVD patients after compression and remained elevated, unlike in normal subjects.
Conclusions:
- Sustained elevation of plasma fibronectin and the Fn/albumin ratio in PVD patients following venous compression suggests potential endothelial injury.
- Plasma fibronectin dynamics may serve as a biomarker for vascular health and injury in PVD.
- Further research is warranted to confirm the diagnostic and prognostic value of Fn in PVD.