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- W574504 abstract "We examined responses of the maximal specific activity (Vmax) of key carbohydrate digestive enzymes in piglets with hydrogen peroxide (H2O2)-induced systemic oxidative stress. Liquid formula-fed piglets at the age of d 5 were fitted with an intraperitoneal catheter and infused with either 5 mmol H2O2/kg BW (PER, n=8) or physiologic saline (CON, n=8) in six injections daily for a period of 10 d. Jejunal enzyme activity experiments for lactase, sucrase, maltase and maltase-glucoamylase were conducted at 37°C with substrate concentrations over two-fold of Km values. Piglets experiencing oxidative stress had lower (P<0.05) jejunal Vmax for lactase and maltase (estimates±SE: PER, 6.54±0.68 vs. CON, 12.65±0.69; and PER, 57.39±1.02 vs. CON, 75.6±1.04 μmol/mg protein.min). However, there were no differences (P>0.05) in Vmax of maltase-glucoamylase and sucrase (estimates±SE: PER, 0.71±0.08 vs. CON, 0.70±0.07; and PER, 10.50±1.37 vs. CON, 12.40±1.55 μmol/mg protein.min). We conclude that oxidative stress reduced intestinal lactase and maltase functions without affecting maltase-glucoamylase and sucrase activities. Supported by OMAFRA of Canada." @default.
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- W574504 date "2007-01-01" @default.
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- W574504 title "Gut carbohydrate digestive enzymes respond differentially to oxidative stress induced by in vivo infusion of hydrogen peroxide (H 2 O 2 ) in formula‐fed piglets" @default.
- W574504 doi "https://doi.org/10.1096/fasebj.21.6.a1076-a" @default.
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