Biochemical and morphological developments are partially impaired in intestinal mucosa from growing pigs fed reduced-protein diets supplemented with crystalline amino acids.

@article{Guay2006BiochemicalAM,
  title={Biochemical and morphological developments are partially impaired in intestinal mucosa from growing pigs fed reduced-protein diets supplemented with crystalline amino acids.},
  author={Fr{\'e}d{\'e}ric Guay and Sharon M. Donovan and Nathalie L. Trottier},
  journal={Journal of animal science},
  year={2006},
  volume={84 7},
  pages={
          1749-60
        }
}
The objective of this study was to determine if a reduction in dietary CP, with partial replacement of the intact protein with crystalline AA (CAA), would alter growth, morphology, and free or peptide-bound AA concentrations of intestinal mucosa in growing pigs. Twenty-four barrows (37.0 +/- 1.5 kg of BW) were fed 1 of 4 diets for 24 d: 16.1% CP with no CAA, or 12.8, 10.1, or 7.8% CP (analyzed values, as-fed) containing CAA. As CP decreased, CAA were gradually increased to meet requirements on… 

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Effects of low-protein diets supplemented with indispensable amino acids on growth performance, intestinal morphology and immunological parameters in 13 to 35 kg pigs.

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  • Medicine, Chemistry
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The addition of protein-bound amino acids in low-protein diets improves the metabolic and immunological characteristics in fifteen- to thirty-five-kg pigs.

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Muscle growth and plasma concentrations of amino acids, insulin-like growth factor-I, and insulin in growing pigs fed reduced-protein diets.

The reduction in the dietary protein-bound AA decreased whole-body and LM growth, altered the free AA pool profile in muscle tissue, and decreased plasma insulin and IGF-I.

Effect of dietary crude protein level on jejunal brush border enzyme activities in weaned pigs

The results showed that feeding a low protein diet supplemented with amino acids according to the ideal protein ratio to piglets had no negative effect on the development of jejunal brush border enzymes.

Feeding dietary peptides to growing rats enhances gut endogenous protein flows compared with feeding protein-free or free amino acid-based diets.

Ileal EAAFL and ENFL were not influenced by body N balance per se but were affected by the presence in the gut of dietary peptides derived from casein.

Low-protein amino acid-supplemented diets for growing pigs: effect on expression of amino acid transporters, serum concentration, performance, and carcass composition.

Results indicate that LPAA can substitute up to 8 percentage units of protein in HP wheat-SBM diets without affecting pig performance; nonessential N does not seem to be limiting in very low-protein wheat- SBM diets for growing pigs.

Advances in low-protein diets for swine

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Casein hydrolysate supplementation in low-crude protein diets increases feed intake and nitrogen retention without affecting nitrogen utilization of growing pigs.

Using protein hydrolysate to replace part crystalline AAs in low-CP diets increased feed intake, N retention and ADG without affecting N utilization.

Low-protein diets supplemented with methionine and lysine alter the gut microbiota composition and improve the immune status of growing lambs

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