Digestion dans l'intestin grêle chez le porc. 2. — Cinétique comparée de passage des digesta selon le mode de fistulation, iléocaecale ou iléo-colique post valvulaire, dans diverses conditions d'alimentation

Darcy, Béatrice; Laplace, J.P.; Viviers, P. A.; Roger, A.; Hecke, Annelies Van

doi:10.1051/animres:19800205

Cited by 27 publications

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“…Despite severe anatomofunctional difficulties [107], we developed a specific ileocolic postvalve fistulation technique, avoiding any mixing of the intestinal digesta collected with the colonic contents [48]. The normal pattern of MMC controlling the passage of digesta along the small intestine was shown to be preserved [51,52] despite the heavy procedures required for surgical preparation and postsurgical care, and provided that a normal colic repletion was maintained by returning digesta. While digesta were formerly collected from ileal T cannulae (i.e.…”

Section: Kinetics Of Passage and Apparent Digestibility Within The Smmentioning

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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Section: Kinetics Of Passage and Apparent Digestibility Within The Smmentioning

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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“…Infusion of a physiological salt solution at the proximal part of the ileo-caecal re-entrant canula to make the digesta thinner so that they flow smoothly has been suggested as a possible solution to blockage problems (van Leeuwen et al 1987), although the disadvantages are that this is more laborious and increases the need to restrain the pigs while infusing the salt solution. The ileo-colic postvalve cannulation technique, developed by Darcy et al (1980), maintains the integrity of the small intestine and preserves the functional role of the ileo-caecal sphincter thus maintaining a more physiological state. It also allows collection of digesta as they arrive normally at the colon.…”

Section: I11 Re-entrant Canulasmentioning

confidence: 99%

Significance of endogenous gut nitrogen losses in the nutrition of growing pigs: A review

Nyachoti¹,

Lange²,

McBride³

et al. 1997

Can. J. Anim. Sci.

231

163

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Nyachoti, C. M., de Lange, C. F. M., McBride, B. W. and Schulze, H. 1997. Significance of endogenous gut nitrogen losses in the nutrition of growing pigs: A review. Can. J. Anim. Sci. 77: 149-163. During the past two decades endogenous gut N losses (ENL) at the distal ileum in the growing pig have received considerable attention in swine nutrition research. Estimates of ENL are important for determining true ileal N and amino acid digestibilities and for identifying means to improve the efficiency of N and energy utilization in growing pigs. Endogenous secretions originate from various sources including saliva, pancreatic secretions, bile, sloughed off epithelial cells, serum albumin and mucin. It has been estimated that 70 to 80% of endogenous N secretions are digested and re-absorbed. Therefore, ENL represents only a fraction of total endogenous N secreted into the gut. Increased ENL are likely associated with elevated rates of gut protein synthesis. This is bound to increase maintenance energy and amino acid requirements of pigs. Traditionally, ENL were determined by feeding protein-free diets or by the regression method. Various alternative techniques ( 15 N-isotope dilution technique, homoarginine technique, enzymatically hydrolysed casein method) are now available to estimate the ENL in pigs fed protein-containing diets. Each of these techniques has some limitations and all require different assumptions. Results obtained with these alternative techniques indicate that the net ENL losses are much higher and more variable than previously estimated, and that they are affected both by animal and dietary factors. Recent estimates of ENL losses vary between 1.8 and 8.3 g kg -1 dry matter intake. The main factors (feed intake, body weight, content of anti-nutritional factors, fibres and [digestible] protein) that affect ENL and approaches (plant breeding and selection, ingredient processing and use of exogenous enzymes) to reduce ENL are discussed in this review. In addition, the metabolic costs associated with ENL are estimated.

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“…The amount of endogenous total nitrogen secreted in the intestinal lumen was 3.6 g per day: 1.9 g N through pancreatic secretion and 1.7 g N through bile secretion. Pancreatic nitrogen increased after meal intake, whilst the kinetics of nitrogen production in the bile were Transit and digestion at the end of the small intestine were assessed by ileal digesta collection, according to Darcy et al (1980). The contribution of the large intestine was assessed by measurements performed in faeces.…”

mentioning

confidence: 99%

Exogenous and endogenous contribution to nitrogen fluxes in the digestive tract of pigs fed a casein diet. I. Contributions of nitrogen from the exocrine pancreatic secretion and the bile

Corring¹,

Souffrant²,

Darcy‐Vrillon³

et al. 1990

Reprod. Nutr. Dévelop.

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Summary -The aim of the present work was to study the endogenous contribution of the exocrine pancreatic and biliary secretions to the total endogenous nitrogen production in the pig. Three growing Large White pigs weighing 45 t 2.5 kg were fitted with permanent fistulae in the pancreatic duct, the bile duct and the duodenum. They were adapted to a semi-synthetic casein diet for 14 d before surgery. In a 7-d post-operative period and an 8-d experimental period, they were fed the same diet. Secretion rates were recorded, total nitrogen and TCA (trichloroacetic acid) insoluble nitrogen were determined in representative pancreatic juice and bile samples.Daily pancreatic juice and bile flow rates were very similar: 1 850 and 1 820 ml, respectively. The amount of endogenous total nitrogen secreted in the intestinal lumen was 3.6 g per day: 1.9 g N through pancreatic secretion and 1.7 g N through bile secretion. Pancreatic nitrogen increased after meal intake, whilst the kinetics of nitrogen production in the bile were

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Digestion dans l'intestin grêle chez le porc. 2. — Cinétique comparée de passage des digesta selon le mode de fistulation, iléocaecale ou iléo-colique post valvulaire, dans diverses conditions d'alimentation

Abstract: RésuméUne nouvelle technique, dite de fistulation iléo-colique post-valvulaire, permettant de collecter les digesta tels qu'ils sont normalement émis vers le gros intestin, est décrite ( fig. 2

Cited by 27 publications

References 0 publications

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

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

Significance of endogenous gut nitrogen losses in the nutrition of growing pigs: A review

Exogenous and endogenous contribution to nitrogen fluxes in the digestive tract of pigs fed a casein diet. I. Contributions of nitrogen from the exocrine pancreatic secretion and the bile

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