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• W2034207473 endingPage "1707" @default.
• W2034207473 startingPage "1692" @default.
• W2034207473 abstract "The thioredoxin system plays a key role in regulating the overall intracellular redox balance. It basically comprises the small redox protein thioredoxin (Trx), nicotinamide adenine dinucleotide phosphate, in its reduced form (NADPH), and thioredoxin reductase (TrxR), a large homodimeric selenzoenzyme controlling the redox state of thioredoxin. Details of the thioredoxin system are provided herein, particular emphasis being given to the protein chemistry of thioredoxin reductases. Several lines of evidence point out today that the thioredoxin system represents an effective “druggable” target for the development of new anticancer agents. Accordingly, a number of established anticancer agents were retrospectively found to be potent inhibitors of thioredoxin reductases and to induce severe oxidative stress. During the last decade a variety of gold compounds, either gold(I) or gold(III), were reported to manifest outstanding antitumor properties, forming a promising class of experimental anticancer agents. In turn, recent studies have revealed that several cytotoxic gold compounds, either gold(I) or gold(III), are potent TrxR inhibitors. Details of their mechanism of selenoenzyme inhibition are currently under investigation, in our laboratory, and some new results will be anticipated here; notably, preferential gold targeting of active site selenolate could be experimentally supported. Based on the numerous experimental evidences now available, both at the molecular and cellular level, we propose that the relevant cytotoxic actions produced by gold compounds are mainly the result of potent inhibition of thioredoxin reductase; the alterations of mitochondrial functions, elicited by profound TrxR inhibition, would eventually lead to cell apoptosis. A general and unitary framework is thus offered to interpret the mode of action of cytotoxic gold compounds, according to which they should be primarily considered as antimitochondrial drugs. The peculiar properties of gold compounds highlighted in this review might be further exploited for the obtainment of newer and selective anticancer agents." @default.
• W2034207473 created "2016-06-24" @default.
• W2034207473 creator A5037001298 @default.
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• W2034207473 creator A5085958362 @default.
• W2034207473 creator A5088994269 @default.
• W2034207473 date "2009-06-01" @default.
• W2034207473 modified "2023-10-11" @default.
• W2034207473 title "Thioredoxin reductase: A target for gold compounds acting as potential anticancer drugs" @default.
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