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In a recent article, we presented the hypothesis that decompartmentalized metal ions are a major contributor to the development of diabetic complications and supported the use of chelation therapy for the treatment of diabetic complications [Nagai R, Murray DB, Metz TO, Baynes JW. Chelation: a fundamental mechanism of action of AGE inhibitors, AGE breakers, and other inhibitors of diabetes complications.  Diabetes  2012;61:549–59]. Evidence in support of this hypothesis included the observation that many drugs used in the treatment of diabetes are chelators, that advanced glycation end product (AGE) inhibitors and AGE breakers lack carbonyl-trapping or AGE-breaker activity but are potent chelators, and that simple copper chelators inhibit vascular pathology in diabetes and aging. In the present article, we extend this hypothesis, proposing the interplay between copper and iron in the development of pathology in diabetes and other chronic age-related diseases, including atherosclerosis and neurodegenerative diseases. We also discuss the need and provide a framework for the development of a clinical laboratory test to assess plasma autoxidative catalytic activity and transition metal homeostasis in vivo.

clinical chemistry and laboratory medicine

Chelation therapy for the management of diabetic complications: a hypothesis and a proposal for clinical laboratory assessment of metal ion homeostasis in plasma