Influence of rumen escape starch on pancreatic exocrine secretion of goats

Du, Shuang‐kui; Wang, J.; Yu, Zhengqing; Harmon, D.L.; Yao, Jun

doi:10.1111/j.1439-0396.2007.00792.x

Cited by 15 publications

(16 citation statements)

References 45 publications

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“…The fact that serum amylase activities were higher towards the end of the study than during the first week is indicative of increased digestion of ruminal fermentation products and escape nutrients with age (Xu et al, 2009). The absence of a significant between-group difference in amylase activity is in line with our results in glucose and L-lactate values.…”

Section: Discussionsupporting

confidence: 82%

Influence of grain processing in regard to serum metabolites and enzymes for finishing bull calves

Castillo

Benedito²,

Pereira³

et al. 2011

J. Anim. Feed Sci.

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This study compared two grain processing methods that are widely used for beef cattle, grinding and steam pelleting, with respect to serum metabolic parameters: glucose, non-esterified fatty acids (NEFA), serum urea nitrogen (SUN), total serum protein (TSP), albumin, L-lactate, aspartate aminotransferase (AST), γ-glutamyltransferase (GGT) and amylase. Ten Belgian Blue bull calves were allotted randomly to each of two experimental groups: PF, fed pelleted concentrate, and GF, fed ground concentrate. During the 77-day study most parameters underwent significant variation in time, increasing only numerically serum values of total protein, albumin, AST and amylase, while serum glucose, NEFA and GGT decreased numerically. Statistically significant differences were found only between groups PF and GF for creatinine (higher in group PF, in relation with its greater average body weight) and urea nitrogen, which for unknown causes fluctuated in opposite directions in the two groups throughout most of the study and attributable to changes in ruminal protein digestion. Neither serum glucose nor L-lactate were affected by treatment of grains.

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Section: Discussionsupporting

confidence: 82%

Influence of grain processing in regard to serum metabolites and enzymes for finishing bull calves

Castillo

Benedito²,

Pereira³

et al. 2011

J. Anim. Feed Sci.

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“…Starch assimilation in the small intestine of ruminants offers improved energy efficiency than that in the rumen (Harmon, 2009). However, the ability of ruminants to digest starch in the small intestine is limited, accounting for 55-78% of the amount entered when starch intake of goats varies from 150 to 450 g/day in our previous studies (Xu et al, 2006(Xu et al, , 2009unpublished data). Moreover, as the flow of starch increases to the small intestine, starch is digested with decreasing efficiency (Huntington et al, 2006), resulting in a loss of potential energy available for growth and milk production, and potential large intestinal acidosis.…”

Section: Introductionmentioning

confidence: 80%

“…In our previous experiment, feeding affected pancreatic exocrine secretion rate in sheep fed three times daily (Xu et al, 2009). In the present study, pancreatic exocrine secretion of goats fed in the morning and evening, respectively, would not be continuous.…”

Section: Sample Collection Timementioning

confidence: 97%

Leucine markedly regulates pancreatic exocrine secretion in goats

Liu

Yao

et al. 2013

Animal Physiology Nutrition

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Four goats (30.1 ± 1.3 kg) with common bile duct re-entrant catheter and duodenal catheter were used to evaluate the effects of duodenal leucine infusion on pancreatic exocrine secretion and plasma parameters with two 4 × 4 Latin square design experiments. In the long-term infusion experiment, goats were fed twice daily [700 g/day, dry matter (DM) basis] at 8:00 and 18:00 hours and were duodenally infused with 0, 3, 6, 9 g/day leucine for 14 days. Pancreatic juice and jugular blood samples were collected over 1-h intervals for 6 h daily from d 11 to 14 days to encompass a 24-h day. In the short-term experiment, goats were infused leucine for 10 h continuously at the same infusion rate with Experiment 1 after feed deprivation for 24 h repeated every 10 days. Pancreatic juice and blood samples were collected at 0, 1, 2, 4, 6, 8 and 10 h of infusion. The results showed that the long-term leucine infusion did not affect pancreatic juice secretion, protein output, trypsin and lipase secretion and plasma insulin concentration, but linearly increased α-amylase secretion. No changes in pancreatic protein and lipase secretion were observed in the short-term infusion. Pancreatic juice and α-amylase secretion responded quadratically, with the greatest values observed in the 3 and 6 g/day leucine respectively. Trypsin secretion linearly decreased, while plasma insulin concentration increased linearly with increased leucine infusion. The results demonstrated that duodenal leucine infusion dose and time dependently regulated pancreatic enzyme secretion not associated with the change in plasma insulin concentration.

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“…Four yearling Guanzhong ewe goats (mean body weight ± SD, 31.2 ± 2.5 kg) were used in two 4 × 4 Latin square experiments, with animals allocated to square and treatments randomly. Under general anaesthesia, animals were surgically prepared with the common bile duct reentrant cannulas for quantitative collection of pancreatic juice as described by our previous report (Xu et al., 2009). Goats were withheld from feed for 48 h and water for 12 h before surgery.…”

Section: Methodsmentioning

confidence: 99%

“…Pancreatic juice samples were analysed for total protein concentration and activities of α‐amylase (Walker and Harmon, 1996), trypsin (Geiger and Fritz, 1986) and lipase. Detection kits (Nanjing Jiancheng Bioengineering Institute, Nanjing, China) were used to analyse total protein concentration (Wang et al., 2008) and lipase activity (Xu et al., 2009). Enzyme activities were expressed in units (one unit is defined as 1 μmol product released per minute at 39 °C) per millilitre.…”

Section: Methodsmentioning

confidence: 99%

Regulation of pancreatic exocrine secretion in goats: differential effects of short‐ and long‐term duodenal phenylalanine treatment

Yu¹,

Xu²,

Yao³

et al. 2012

Animal Physiology Nutrition

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Four yearling goats (31.2 ± 2.5 kg), surgically fitted with common bile duct reentrant and duodenal catheter, were used in two 4 × 4 Latin square design experiments to investigate the effects of duodenal infusion of phenylalanine for different times on pancreatic exocrine secretion (PES). In experiment 1 (the long-term experiment), goats were duodenally infused with 0, 2, 4 or 8 g/day phenylalanine for 14 day. Pancreatic juice and jugular blood samples were collected over 1-h intervals for 6 h daily from day 11 to day 14 to encompass a 24-h day. In experiment 2 (the short-term experiment), goats were infused with phenylalanine for 10 h continuously at the same infusion rate as experiment 1 after feed deprivation for 24 h repeated every 10 day. Pancreatic juice and blood samples were collected at 0, 1, 2, 4, 6, 8 and 10 h of infusion. The volume and pH of pancreatic juice were measured, and a 5% subsample was composited and frozen until analysis of enzyme activities. Plasma was frozen until analysis of insulin and cholecystokinin (CCK). In experiment 1, pancreatic juice, α-amylase secretion and plasma CCK concentration responded quadratically (p < 0.05), with the top value observed at the 2 g/day phenylalanine. Trypsin secretion had a quadratic response (p < 0.05), with secretion increasing up to 4 g/day phenylalanine and decreasing thereafter. Phenylalanine linearly decreased pancreatic protein and lipase secretion (p < 0.05). The results of correlation analysis showed significant correlations (p < 0.05) between plasma CCK concentration and secretion of α-amylase and trypsin. However, the short-term phenylalanine infusion did not influence (p > 0.05) pancreatic juice, protein, α-amylase, lipase, trypsin secretion and plasma CCK concentration. These results indicate PES of ruminants is stimulated by phenylalanine and is potentially mediated by CCK in the long-term duodenal infusion treatment, but is not influenced by phenylalanine in the short-term duodenal infusion treatment.

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Influence of rumen escape starch on pancreatic exocrine secretion of goats

Cited by 15 publications

References 45 publications

Influence of grain processing in regard to serum metabolites and enzymes for finishing bull calves

Influence of grain processing in regard to serum metabolites and enzymes for finishing bull calves

Leucine markedly regulates pancreatic exocrine secretion in goats

Regulation of pancreatic exocrine secretion in goats: differential effects of short‐ and long‐term duodenal phenylalanine treatment

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