Changes in Metalloproteinase (MMP-1, MMP-2) Expression in the Proximal Region of the Varicose Saphenous Vein Wall in Young Subjects

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Abstract
Objective: An evaluation of the proteoglycan perlecan, collagen I and III, and metalloproteinases MMP−1, −2, −3 and −9 was performed to explore the possible relationships between ageing, affected vein region and reactive state of the varicose vein wall. Methods: Segments of saphenous vein were obtained from healthy subjects and from those with varicose veins. The vein specimens were subdivided according to subject age (<50/^50) and vein source (distal/proximal). Results: The walls of control vein specimens acquired a more collagenous appearance with age. These changes were not accompanied by significant modifications in the immunohistochemical markers used. In specimens from young patients, proximal varicose vein segments showed an increase in MMP-1, MMP-2 and MMP-9 expression. Subjects of more advanced age showed an increase in perlecan expression. Conclusion: This increase in MMPs could lead to the acceleration of the final fibrosclerotic process characteristic of the varicose vein wall.