Impacts of whey protein on starch digestion in rumen and small intestine of steers
Four Korean native steers (511 ± 17.2 kg; 2 × 2 replicated crossover design) fitted with duodenal cannulas were used to investigate the influence of oral administration of soluble whey protein (WP; 82.29% crude protein) on ruminal fermentat...
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doaj-bdd91fc9d9c8418bae8dff8b44ca8b6c2020-11-25T03:14:54ZengKorean Society of Animal Sciences and TechnologyJournal of Animal Science and Technology1598-94292055-03912019-03-016129810810.5187/jast.2019.61.2.98jast-61-2-98Impacts of whey protein on starch digestion in rumen and small intestine of steersSang-Bum Lee0Kyoung-Won Lee1Jae-Sung Lee2Kyung-Hoon Kim3Hong-Gu Lee4Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, KoreaLife Science Technology Inc., Seoul 05029, KoreaDepartment of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, KoreaInstitute of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354, KoreaDepartment of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, KoreaFour Korean native steers (511 ± 17.2 kg; 2 × 2 replicated crossover design) fitted with duodenal cannulas were used to investigate the influence of oral administration of soluble whey protein (WP; 82.29% crude protein) on ruminal fermentation, gastrointestinal (GI) hormone secretion in the blood, pancreatic α-amylase activity in the duodenum, and disappearance rate in each segment of the GI tract. Steers were orally fed the basal diet (control; TMR [total mixed ration] 9 kg/d) or the basal diet with enriched WP (400 g/d) for 14 days. The apparent crude protein disappearance rate in the rumen of the WP was higher than in control (p < 0.05). However, no difference between groups was observed in the apparent crude protein disappearance rate in the intestine and the apparent starch disappearance rates in the rumen, GI tract. The level of cholecystokinin, secretin, and ghrelin in serum and pancreatic α-amylase activity in the duodenum of the WP also did not change. The changes in the level of blood urea nitrogen related to protein metabolism were higher in the WP than in the control (p < 0.05). However, the levels of total protein, lipid, carbohydrate and mineral metabolites did not change. Consequently, we suggest that the oral administration of WP in steers assisted in ruminal fermentation due to the population increase of microbes in the rumen but did not improve the starch digestion rate in the small intestine because GI hormone secretion in the blood and pancreatic α-amylase activity did not change.http://www.ejast.org/archive/view_article?pid=jast-61-2-98IntestineKorean native steerRumen fermentationStarch disappearance rateWhey protein |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Sang-Bum Lee Kyoung-Won Lee Jae-Sung Lee Kyung-Hoon Kim Hong-Gu Lee |
spellingShingle |
Sang-Bum Lee Kyoung-Won Lee Jae-Sung Lee Kyung-Hoon Kim Hong-Gu Lee Impacts of whey protein on starch digestion in rumen and small intestine of steers Journal of Animal Science and Technology Intestine Korean native steer Rumen fermentation Starch disappearance rate Whey protein |
author_facet |
Sang-Bum Lee Kyoung-Won Lee Jae-Sung Lee Kyung-Hoon Kim Hong-Gu Lee |
author_sort |
Sang-Bum Lee |
title |
Impacts of whey protein on starch digestion in rumen and small
intestine of steers |
title_short |
Impacts of whey protein on starch digestion in rumen and small
intestine of steers |
title_full |
Impacts of whey protein on starch digestion in rumen and small
intestine of steers |
title_fullStr |
Impacts of whey protein on starch digestion in rumen and small
intestine of steers |
title_full_unstemmed |
Impacts of whey protein on starch digestion in rumen and small
intestine of steers |
title_sort |
impacts of whey protein on starch digestion in rumen and small
intestine of steers |
publisher |
Korean Society of Animal Sciences and Technology |
series |
Journal of Animal Science and Technology |
issn |
1598-9429 2055-0391 |
publishDate |
2019-03-01 |
description |
Four Korean native steers (511 ± 17.2 kg; 2 × 2 replicated
crossover design) fitted with duodenal cannulas were used to investigate the
influence of oral administration of soluble whey protein (WP; 82.29%
crude protein) on ruminal fermentation, gastrointestinal (GI) hormone secretion
in the blood, pancreatic α-amylase activity in the duodenum, and
disappearance rate in each segment of the GI tract. Steers were orally fed the
basal diet (control; TMR [total mixed ration] 9 kg/d) or the basal diet with
enriched WP (400 g/d) for 14 days. The apparent crude protein disappearance rate
in the rumen of the WP was higher than in control (p <
0.05). However, no difference between groups was observed in the apparent crude
protein disappearance rate in the intestine and the apparent starch
disappearance rates in the rumen, GI tract. The level of cholecystokinin,
secretin, and ghrelin in serum and pancreatic α-amylase activity in the
duodenum of the WP also did not change. The changes in the level of blood urea
nitrogen related to protein metabolism were higher in the WP than in the control
(p < 0.05). However, the levels of total protein,
lipid, carbohydrate and mineral metabolites did not change. Consequently, we
suggest that the oral administration of WP in steers assisted in ruminal
fermentation due to the population increase of microbes in the rumen but did not
improve the starch digestion rate in the small intestine because GI hormone
secretion in the blood and pancreatic α-amylase activity did not
change. |
topic |
Intestine Korean native steer Rumen fermentation Starch disappearance rate Whey protein |
url |
http://www.ejast.org/archive/view_article?pid=jast-61-2-98 |
work_keys_str_mv |
AT sangbumlee impactsofwheyproteinonstarchdigestioninrumenandsmallintestineofsteers AT kyoungwonlee impactsofwheyproteinonstarchdigestioninrumenandsmallintestineofsteers AT jaesunglee impactsofwheyproteinonstarchdigestioninrumenandsmallintestineofsteers AT kyunghoonkim impactsofwheyproteinonstarchdigestioninrumenandsmallintestineofsteers AT honggulee impactsofwheyproteinonstarchdigestioninrumenandsmallintestineofsteers |
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