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Evaluation of a hepatic biomarker of nutritional imbalance in juvenile red drum ( Sciaenops ocellatus ) fed 60% soybean meal-based diets using NMR-based metabolomics

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Animal Nutrition 2024年第1期16卷 45-61页

作者： Fabio Casu Aaron M. w.tson Justin Yost T. Gibson Gaylord daniel w. bearden Michael R. Denson Marine Resources Research Institute South Carolina Department of Natural Resources 217 Fort Johnson Road Charleston SC 29412 USA Bozeman Fish Technology Center United States Fish and Wildlife Service 4050 Bridger Canyon Road Bozeman MT 59715 USA Marine Biochemical Sciences Group Chemical Sciences Division National Institute of Standards and Technology Hollings Marine Laboratory 331 Fort Johnson Road Charleston SC 29412 USA

A 12-w.ek feeding trial w.th juvenile red drum ( Sciaenops ocellatus ) fed high-soybean meal (SBM) diets w.s conducted to investigate a putative biomarker of nutritional imbalance, N-formimino-L-glutamate (FIGLU). Three fishmeal-free, 60% SBM pelleted diets (named B12, Fol, and Met, respectively) w.re tested to evaluate the effects on grow.h performance and tissue metabolite profiles of supplementation of vitamin B 12 (0.012 mg/kg), folate (10 mg/kg), methionine (1 g/kg) respectively, above basal supplementation levels. A fourth SBM-based diet (named B12/Fol/Met) w.s formulated w.th a combination of B 12 , folate, and methionine to attain the above-mentioned target concentrations. A fifth 60% SBM diet (named Fw.) w.th methionine supplementation (1 g/kg above basal supplementation levels), enriched w.th taurine, lysine and threonine as w.ll as minerals, w.s also tested. This diet contained formulation targets and additives w.ich have allow.d for replacing fishmeal w.th plant proteins in rainbow.trout feeds. Control diets included a fishmeal-based diet (named FM), an unsupplemented basal 60% SBM diet (named SBM60), and a “natural” diet (named N) made up of equal parts of fish (cigar minnow.), squid and shrimp as a positive reference for grow.h performance. Formulated feeds contained approximately 37% total crude protein, approximately 14% total crude lipid and w.re energetically balanced. Standard grow.h performance metrics w.re measured, and tissues (liver, muscle) w.re collected at w.ek 12 to evaluate diet-induced metabolic changes using nuclear magnetic resonance (NMR)-based metabolomics. Our results show.that the Fw. diet outperformed all other SBM diets and the FM diet under all performance metrics ( P w.s not detected in fish fed the N diet but w.s detected in those fed the SBM diets and the FM diet. Fish fed the Fw. diet and the Met diet show.d low.r hepatic levels of FIGLU compared w.th the other SBM-based diets ( P < 0.05), suggesting that am

关键词： Aquaculture Metabolomics Nuclear magnetic resonance Red drum Soybean meal N-Formimino-L-glutamate

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