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- W2102087316 abstract "Increased H2O2 production, indicating higher oxidative stress, and lower mitochondrial function was previously observed in duodenal mitochondria isolated from broilers with low feed efficiency (FE, gain:feed). Thus, experiments were conducted to 1) evaluate the activity of the respiratory chain complexes (complexes I to V) and 2) assess protein oxidation and mitochondrial protein expression in broilers with low and high FE. Duodenal mitochondria were isolated from broiler breeders with low (0.52 +/- 0.01) and high (0.68 +/- 0.01) FE (n = 8/group). Respiratory chain complex activities were measured spectrophotometrically, whereas mitochondrial protein expression and protein oxidation (carbonyls) were assessed with Western blots. The activities of all complexes, except complex IV, were lower in the low FE compared with high FE mitochondria, whereas protein carbonyl levels were higher in low FE mitochondria. Steady-state levels of 6 out of 7 nuclear-encoded respiratory chain subunits [70S(FP), core I, core II, cytochrome c (cyt c)1, iron-sulfur protein (ISP), and ATPase-alpha] were higher, whereas 3 out of 6 mitochondrial-encoded subunits (ND4, ND6-C, and COX II) were lower in the low FE group, suggesting that sensitivity of mitochondrial proteins to H2O2 or oxidation varies. The general reduction in complex activity and differential protein expression concomitant with higher oxidized proteins in low FE mitochondria suggest that oxidative stress could be contributing to the lower mitochondrial function observed in low FE duodenal mitochondria." @default.
- W2102087316 created "2016-06-24" @default.
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- W2102087316 date "2005-12-01" @default.
- W2102087316 modified "2023-10-15" @default.
- W2102087316 title "Biochemical evaluation of mitochondrial respiratory chain in duodenum of low and high feed efficient broilers" @default.
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- W2102087316 doi "https://doi.org/10.1093/ps/84.12.1926" @default.
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