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[Fibronectin content of the intima of normal and atherosclerotic arteries].

An immunofluorescent study demonstrated the localization of fibronectin and collagen of types 1, 3, 4 and 5 in normal arterial intima and atherosclerotic patches. In the atherosclerotic patches, fibronectin is mostly grouped among cells of smooth-muscle origin together with collagen of type 4, while the fibrous tissue of the patches contains little fibronectin. It is assumed that changed extracellular matrix composition reflects the development of atherosclerotic patches, and fibronectin can be regarded as a marker of early stages of atherosclerosis.