4.7 Review

Release of redox enzymes and micro-RNAs in extracellular vesicles, during infection and inflammation

期刊

FREE RADICAL BIOLOGY AND MEDICINE
卷 169, 期 -, 页码 248-257

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ELSEVIER SCIENCE INC
DOI: 10.1016/j.freeradbiomed.2021.04.010

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microRNA; Peroxiredoxin; Thioredoxin; Exosomes; Sepsis; Inflammation; Immunity

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Redox enzymes, such as thioredoxin and peroxiredoxin, have been found to act as soluble mediators in immunity by being released from cells. Peroxiredoxins, in particular, can be secreted via exosome-release route but the exact mechanism and reasons behind this process remain unclear. This review discusses the potential redox states of protein cysteines and the role of redox enzymes in their regulation, as well as the studies on the extracellular forms of these enzymes and their association with exosomes/extracellular vesicles in infection and inflammation.
Many studies reported that redox enzymes, particularly thioredoxin and peroxiredoxin, can be released by cells and act as soluble mediators in immunity. Recently, it became clear that peroxiredoxins can be secreted via the exosome-release route, yet it remains unclear how this exactly happens and why. This review will first introduce briefly the possible redox states of protein cysteines and the role of redox enzymes in their regulation. We will then discuss the studies on the extracellular forms of some of these enzymes, their association with exosomes/ extracellular vesicles and with exosome micro-RNAs (miRNAs)/mRNAs involved in oxidative processes, relevant in infection and inflammation.

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