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Thioredoxin is a redox protein while adiponectin is an adipokine. Their relationship has been less appreciated. Here we show that in serum of patients with acute exacerbations of chronic obstructive Pulmonary Disease, decreased activity of thioredoxin coexists with increased level of adiponectin as partial pressure of arterial oxygen decreases. From the results with adiponectin-knockout mice and in...
Overnutrition can lead to oxidative stress, but its underlying mechanism remains unclear. In this study, we report that human liver-derived HepG2 cells utilize cytosolic thioredoxin reductase (TrxR1) and thioredoxin (hTrx1) to defend against the high glucose/palmitate-mediated increase in reactive oxygen species. However, enhanced TrxR1/hTrx1 palmitoylation occurs in parallel with a decrease in their...
High-fat diet (HFD) can induce oxidative stress. Thioredoxin (Trx) and thioredoxin reductase (TrxR) are critical antioxidant proteins but how they are affected by HFD remains unclear. Using HFD-induced insulin-resistant mouse model, we show here that liver Trx and TrxR are significantly decreased, but, remarkably, the degree of their S-acylation is increased after consuming HFD. These HFD-induced...
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