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Objectives.  To evaluate if the prooxidant environment present in atherosclerotic plaque may oxidatively modify filtered albumin.  Methods.  Fluorescein-5-maleimide labelled plasma samples and plaque extracts from 27 patients who had undergone carotid endarterectomy were analysed through nonreducing SDS-PAGE for albumin-Cys 34  oxidation. Furthermore, degree and pattern of S-thiolation in both circulating and plaque-filtered albumin were assayed.  Results.  Albumin filtered in the atherosclerotic plaque showed higher levels of Cys 34  oxidative modifications than the corresponding circulating form as well as different patterns of S-thiolation.  Conclusions.  Data indicate that the circulating albumin, once filtered in plaque, undergoes Cys 34  oxidative modifications and demonstrate for the first time that albumin is a homocysteine and cysteinylglycine vehicle inside the plaque environment.

Human Serum Albumin Cys34Oxidative Modifications following Infiltration in the Carotid Atherosclerotic Plaque

Human Serum Albumin Cys³⁴Oxidative Modifications following Infiltration in the Carotid Atherosclerotic Plaque