Effects of dietary yeast β-1.3/1.6-glucans on oxidative stress biomarkers in hearts and livers of rainbow trout (<i>Oncorhynchus mykiss</i> Walbaum), European whitefish (<i>Coregonus lavaretus</i> L.), and grayling (<i>Thymallus thymallus</i> L.)

Abstract The present study was performed to investigate the effects of dietary yeast β-1,3/1,6-D-glucans supplemented over a 14-day feeding period on liver and cardiac function oxidative mechanism underlying these effects. We assessed relevant lipid peroxidation protein oxidation biomarkers, antioxidant defense indices [superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), peroxidase (GPx), total capacity (TAC)], biochemical alterations [activities aminotransferases (AT), lactate dehydrogenase (LDH), succinate (SDH), levels (L) pyruvate (P)] in rainbow trout, European whitefish, grayling. fish received control diet an experimental containing at dose 1% basal feed for 14 days. results demonstrated enhancement phagocytic activity index groups fed β-glucans, compared groups. In stress parameters such as peroxidation, oxidatively modified proteins, TAC did not vary significantly. β-glucans stimulated CAT GPx activities hepatic tissues comparison group; however, reverse trend observed GR tissues.