Proteins in the digesta of the pig : amino acid composition of endogenous, bacterial and fecal fractions

Laplace, J.P.; Darcy‐Vrillon, Béatrice; Duval-Iflah, Y; Raibaud, P.

doi:10.1051/rnd:19850808

Cited by 23 publications

(10 citation statements)

References 12 publications

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“…As the digestion proceeded, there was a continuous mixing of the protein from the meal, and also a dilution with protein from endogenous source (Laplace et al, 1985). As (Silk et aL, 1979;Adibi and Kim, 1981), this seemed from the present results as from previous ones (Galibois and Savoie, 1987) (Christensen, 1982;McNurlan and Garlick, 1984).…”

Section: In Vitro Datasupporting

confidence: 78%

Relation between in vitro and in vivo assessment of amino acid availability

Galibois¹,

Savoie²,

Nunes³

et al. 1989

Reprod. Nutr. Dévelop.

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Section: In Vitro Datasupporting

confidence: 78%

Relation between in vitro and in vivo assessment of amino acid availability

Galibois¹,

Savoie²,

Nunes³

et al. 1989

Reprod. Nutr. Dévelop.

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“…References for DAPA / bacterial N ratios of bacteria found from the digestive tract of pigs are scarce. Laplace et al (1985) reported a DAPA / bacterial N ratio of 24.8 for a pure E. coli culture and values of 29.9 and 19.9 g/g in bacteria isolated from the faeces of pigs fed standard and semi-synthetic diets, respectively. The latter figures support the conclusion that the use of a constant DAPA / bacterial N ratio could be misleading.…”

Section: Figurementioning

confidence: 99%

Effects of a dietary organic acid mixture and of dietary fibre levels on ileal and faecal nutrient apparent digestibility, bacterial nitrogen flow, microbial metabolite concentrations and rate of passage in the digestive tract of pigs

Partanen

Jalava

Valaja

2007

Animal

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Six 34-kg barrows were fitted with a post-valve T-caecum cannula and assigned to six dietary treatments according to a 6 £ 5 change-over design to study how a mixture of formic acid, sorbate, and benzoate (0 or 8.4 g/kg feed) influences apparent ileal and faecal digestibility coefficients, bacterial nitrogen (N) flow, microbial metabolite concentrations, and passage rate in pigs fed isoenergetic diets with medium, high, or very high fibre content (neutral-detergent fibre (NDF): 199, 224, and 248 g/kg dry matter, respectively). These barley and soya-bean meal based diets contained 0, 75, and 150 g/kg barley fibre (NDF: 577 g/kg) and 0, 8, and 16 g/kg rapeseed oil, respectively. The dietary organic acid mixture improved the apparent ileal digestibility of 14 of the 17 amino acids analysed (P , 0.05). Increasing levels of dietary fibre linearly decreased the apparent ileal digestibility of six of the 17 amino acids analysed (P , 0.05). Ileal flows of bacterial N and amino acids as assessed on the basis of purine flow were decreased by the dietary organic acid mixture (P , 0.05) but were not affected by dietary fibre level (P . 0.05). As assessed on the basis of diaminopimelic acid flow, bacterial N flow was increased by both the dietary organic acid mixture and increased dietary fibre levels (P , 0.05). The dietary organic acid mixture reduced the concentration of lactic acid and increased that of acetic acid in ileal digesta (P , 0.05), while dietary fibre levels had a quadratic effect on concentrations of acetic, propionic, and butyric acid (P , 0.05). The mean retention time of Co (solute marker) and Yb (particle marker) in the large intestine decreased in a linear manner by increasing dietary fibre levels (P , 0.05) but was not affected by the dietary organic acid mixture (P . 0.05). The results show that a dietary organic acid mixture has a positive effect on the apparent ileal digestibility of most amino acids irrespective of dietary fibre levels. This could be at least partly related to changes in bacterial N flow in the ileum. However, different bacterial markers showed opposite effects on bacterial N flow, which makes it questionable to use a constant bacterial marker / bacterial N ratio to estimate bacterial N flow. Increasing levels of dietary fibre had negative effects on the apparent ileal amino acid digestibilities and shortened the mean retention time of digesta in the large intestine.

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“…46 g out of 54 g produced). The composition of various endogenous and microbial proteins (meconium of piglet small intestine and colon, axenic piglet faeces, bacteria isolated from faeces under different dietary conditions) were described [111], as well as that of pancreatic secretion [28]. The contributions of nitrogen from exocrine pancreatic secretion and bile to nitrogen fluxes were assessed [38].…”

Section: Absorption Of Minerals Sugars and Amino Acidsmentioning

confidence: 99%

Forty years of achievement in french research on digestive physiology in the pig

Laplace¹,

Aumaı̂tre²,

Rérat³

2001

Reprod. Nutr. Dev.

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-The contribution of the research group set up by Rérat in the early 1960s in Jouy-en-Josas, and then expanded to Rennes, is summarised. As digestive processes are a major key to the nutritional status of monogastric animals, original methodologies based on advanced experimental surgery were developed in the pig to quantify the digestion and absorption yield, to know their factors of variation, and to understand their physiological and nutritional consequences. The group also extended its expertise to the control of food intake, the role of the nervous system and regulatory peptides, and several biomedical gut-related topics. pig / digestion / absorption / neurohumoral regulation / adaptationRésumé -Réalisations et succès de la recherche française : quarante ans de physiologie digestive chez le porc. Dès le début des années 60, un groupe de recherches a été constitué à l'initiative de A. Rérat à Jouy-en-Josas pour étudier divers aspects de la physiologie digestive chez le porc. Leur exploration a fourni des clés essentielles pour la maîtrise du statut nutritionnel chez cette espèce monogastrique, et un instrument d'amélioration de la production porcine. Ce groupe s'est élargi au fil des années et a même essaimé dans les années 80, notamment à Rennes. Il a apporté une contribution essentielle par le développement de méthodologies nouvelles généralement basées sur une chirurgie expérimentale très élaborée. Ces approches ont fourni de nombreux travaux originaux qui ont permis de décrire les processus de digestion (motricité, transit, sécrétions, hydrolyses enzymatiques

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Proteins in the digesta of the pig : amino acid composition of endogenous, bacterial and fecal fractions

Cited by 23 publications

References 12 publications

Relation between in vitro and in vivo assessment of amino acid availability

Relation between in vitro and in vivo assessment of amino acid availability

Effects of a dietary organic acid mixture and of dietary fibre levels on ileal and faecal nutrient apparent digestibility, bacterial nitrogen flow, microbial metabolite concentrations and rate of passage in the digestive tract of pigs

Forty years of achievement in french research on digestive physiology in the pig

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