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Lee SB, Lee KW, Wang T, Lee JS, Jung US, Nejad JG, Oh YK, Baek YC, Kim KH, Lee HG. Administration of encapsulated L-tryptophan improves duodenal starch digestion and increases gastrointestinal hormones secretions in beef cattle. ASIAN-AUSTRALASIAN JOURNAL OF ANIMAL SCIENCES 2019; 33:91-99. [PMID: 31902185 PMCID: PMC6946987 DOI: 10.5713/ajas.19.0498] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 10/30/2019] [Indexed: 12/14/2022]
Abstract
Objective This study investigated the effects of oral administration of rumen-protected L-tryptophan (RPL-T) on duodenal starch digestion and gastrointestinal hormones (GIH) secretions using Hanwoo beef steers as the animal models. Methods Four steers (423±24 kg) fitted with ruminal and duodenal cannulas were employed in a crossover design replicated twice. Treatments were control (basal diet) and RPL-T (basal diet+191.1 mg/kg body weight [BW]) group. Blood and duodenal samples were collected to measure serum GIH levels and pancreatic α-amylase activity at day 0, 1, 3, and 5 (−30, 30, 90, 150, and 210 min) of the study. Samples from each segment of the gastrointestinal tract were collected via ruminal and duodenal cannulas and were used to determine soluble protein and the starch digestion rate at days 6 (−30, 180, 360, and 540 min) and 8 (−30, 90, 270, and 450 min) of the experiment. Results No significant difference in ruminal pH, NH3-N, and total volatile fatty acid including the levels of acetate, propionate, butyrate, isobutyrate, valerate, isovalerate, and the acetate-to-propionate ratio was observed between groups (p>0.05). Crude protein uptake was higher and feces starch content was lower in RPL-T group than the control group (p<0.05). The D-glucose contents of feces in RPL-T group decreased at day 5 compared to those in the control group (p<0.05), however, no change was found at day 0, 1, or 3 compared to the control group (p>0.05). Serum cholecystokinin (CCK), melatonin, duodenal pancreatic α-amylase activity, and starch digestion were significantly higher in RPL-T group than the control group (p<0.05). Conclusion Taken together, oral administration of RPL-T at the rate of 191.1 mg/kg BW consistently increased CCK concentration, pancreatic α-amylase activity in duodenal fluids, and starch digestion rate in the small intestine and thus found to be beneficial.
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Affiliation(s)
- Sang-Bum Lee
- Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea
| | | | - Tao Wang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Jilin Agricultural University, Jilin 130118, China
| | - Jae-Sung Lee
- Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea
| | - U-Suk Jung
- Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea
| | - Jalil Ghassemi Nejad
- Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea.,Team of an Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea
| | - Young-Kyoon Oh
- Department of Nutrition and Physiology, National Institute of Animal Science, RDA, JeonJu 55365, Korea
| | - Youl-Chang Baek
- Department of Nutrition and Physiology, National Institute of Animal Science, RDA, JeonJu 55365, Korea
| | - Kyoung Hoon Kim
- Graduate School of International Agricultural Technology, Pyeongchang Campus, Seoul National University, Pyeongchang 25354, Korea
| | - Hong-Gu Lee
- Department of Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea.,Team of an Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Sanghuh College of Life Sciences, Konkuk University, Seoul 05029, Korea
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Lee SB, Lee KW, Wang T, Lee JS, Jung US, Nejad JG, Oh YK, Baek YC, Kim KH, Lee HG. Intravenous administration of L-tryptophan stimulates gastrointestinal hormones and melatonin secretions: study on beef cattle. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2019; 61:239-244. [PMID: 31452911 PMCID: PMC6686141 DOI: 10.5187/jast.2019.61.4.239] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 06/05/2019] [Accepted: 06/10/2019] [Indexed: 01/26/2023]
Abstract
This study aimed to determine the effective dose of intravenous administration of L-tryptophan (L-T) on gastrointestinal hormones (GIH) secretions and melatonin using Hanwoo cattle. Three steers (362 ± 23 kg) fitted with indwelling jugular vein catheters were assigned in a 3 × 3 Latin square design. Treatments were intravenous administration of saline (control), 28.9 mg L-T/kg body weight (BW; low) and 57.8 mg L-T/kg BW (high) L-T for 1 day with 7 days of adaptation. Samples were collected after adaptation period at -60, 0, 30, 60, 90, 120, 150, 180, 240, and 300 min of sampling day. The levels of serum cholecystokinin (CCK) and secretin were higher (p < 0.05) in the high L-T group than those in the other groups. Serum Melatonin (MEL) levels were increased upon L-T administration (p < 0.05) in the high L-T group. Taken together, the effective dose of L-T administration was defined at 57.8 mg L-T/kg BW in order to stimulate increase of GIH and MEL.
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Affiliation(s)
- Sang-Bum Lee
- Department of Animal Science and Technology, College of Animal
Bioscience and Technology, Konkuk University, Seoul 05029,
Korea
| | | | - Tao Wang
- Department of Animal Nutrition and Feed Science, College of Animal
Science and Technology, Jilin Agricultural University, Jilin 130118,
China
| | - Jae-Sung Lee
- Department of Animal Science and Technology, College of Animal
Bioscience and Technology, Konkuk University, Seoul 05029,
Korea
- An Educational Program for Specialists in Global Animal Science,
Brain Korea 21 Plus Project, Konkuk University, Seoul 05029,
Korea
| | - U-Suk Jung
- Department of Animal Science and Technology, College of Animal
Bioscience and Technology, Konkuk University, Seoul 05029,
Korea
| | - Jalil Ghassemi Nejad
- Department of Animal Science and Technology, College of Animal
Bioscience and Technology, Konkuk University, Seoul 05029,
Korea
- An Educational Program for Specialists in Global Animal Science,
Brain Korea 21 Plus Project, Konkuk University, Seoul 05029,
Korea
| | - Young-Kyoon Oh
- Department of Nutrition and Physiology, National Institute of
Animal Science, RDA, JeonJu 55365, Korea
| | - Youl-Chang Baek
- Department of Nutrition and Physiology, National Institute of
Animal Science, RDA, JeonJu 55365, Korea
| | - Kyoung Hoon Kim
- Graduate School of International Agricultural Technology,
Pyeongchang Campus, Seoul National University, Pyeongchang 25354,
Korea
| | - Hong-Gu Lee
- Department of Animal Science and Technology, College of Animal
Bioscience and Technology, Konkuk University, Seoul 05029,
Korea
- An Educational Program for Specialists in Global Animal Science,
Brain Korea 21 Plus Project, Konkuk University, Seoul 05029,
Korea
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Lee SB, Lee KW, Lee JS, Kim KH, Lee HG. Impacts of whey protein on starch digestion in rumen and small intestine of steers. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2019; 61:98-108. [PMID: 31333867 PMCID: PMC6582930 DOI: 10.5187/jast.2019.61.2.98] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/20/2019] [Indexed: 12/02/2022]
Abstract
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.
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Affiliation(s)
- Sang-Bum Lee
- Department of Animal Science and
Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul
05029, Korea
| | | | - Jae-Sung Lee
- Department of Animal Science and
Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul
05029, Korea
- Team of An Educational Program for
Specialists in Global Animal Science, Brain Korea 21 Plus Project, Konkuk
University, Seoul 05029, Korea
| | - Kyung-Hoon Kim
- Institute of Green Bio Science and
Technology, Seoul National University, Pyeongchang 25354,
Korea
| | - Hong-Gu Lee
- Department of Animal Science and
Technology, Sanghuh College of Life Sciences, Konkuk University, Seoul
05029, Korea
- Team of An Educational Program for
Specialists in Global Animal Science, Brain Korea 21 Plus Project, Konkuk
University, Seoul 05029, Korea
- Corresponding author: Hong-Gu Lee, Department of
Animal Science and Technology, Sanghuh College of Life Sciences, Konkuk
University, Seoul 05029, Korea. Tel: +82-2-450-0523, E-mail:
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Edwards SL, Mergan L, Parmar B, Cockx B, De Haes W, Temmerman L, Schoofs L. Exploring neuropeptide signalling through proteomics and peptidomics. Expert Rev Proteomics 2018; 16:131-137. [DOI: 10.1080/14789450.2019.1559733] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - Lucas Mergan
- Animal Physiology and Neurobiology, Department of Biology, KU Leuven, Leuven, Belgium
| | - Bhavesh Parmar
- Animal Physiology and Neurobiology, Department of Biology, KU Leuven, Leuven, Belgium
| | - Bram Cockx
- Animal Physiology and Neurobiology, Department of Biology, KU Leuven, Leuven, Belgium
| | - Wouter De Haes
- Animal Physiology and Neurobiology, Department of Biology, KU Leuven, Leuven, Belgium
| | - Liesbet Temmerman
- Animal Physiology and Neurobiology, Department of Biology, KU Leuven, Leuven, Belgium
| | - Liliane Schoofs
- Animal Physiology and Neurobiology, Department of Biology, KU Leuven, Leuven, Belgium
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Lee KH, Lee JS, Wang T, Oh JJ, Roh S, Lee HG. Role of ghrelin in the pancreatic exocrine secretion via mitogen-activated protein kinase signaling in rats. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2017; 59:16. [PMID: 28748103 PMCID: PMC5523148 DOI: 10.1186/s40781-017-0141-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 06/12/2017] [Indexed: 11/19/2022]
Abstract
Background This study was performed to investigate the impact of exogenous ghrelin on the pancreatic α-amylase outputs and responses of pancreatic proteins to ghrelin that may relate to pancreatic exocrine. Methods Sprague-Dawley male rats (9 weeks old, 300 ± 10 g) were injected with ghrelin via intraperitoneal (i.p.) infusion at dosage of 0, 0.1, 1.0 and 10.0 μg/kg body weight (BW), respectively. The plasma ghrelin and cholecystokinin (CCK) level were determined using enzyme immunoassay kit; the mRNA expression of ghrelin receptor (GHSR-1α) and growth hormone (GH) receptor were assessed by reverse transcription PCR; the expressions of pancreatic α-amylase activity, extracellular-signal-regulated kinases (ERK), phosphorylated extracellular-signal-regulated kinases (pERK) and c-Jun N-terminal kinase (JNK) were evaluated by western blotting; moreover the responses of pancreatic proteins to ghrelin were analyzed using the two-dimensional gel electrophoresis system. Results The exogenous ghrelin (1.0 and 10.0 μg/kg BW) elevated the level of plasma ghrelin (p < 0.05), and suppressed the expression of pancreatic α-amylase at a dose of 10.0 μg/kg BW (p < 0.05). No difference in the level of plasma CCK was observed, even though rats were exposed to any dose of exogenous ghrelin. In addition, a combination of western blot and proteomic analysis revealed exogenous ghrelin (10.0 μg/kg BW) induced increasing the JNK and ERK expressions (p < 0.05) and four proteins such as Destrin, Anionic trypsin-1, Trypsinogen, and especially eukaryotic translation initiation factor 3 in rat pancreas. Conclusions Taken together, exogenous ghrelin by i.p. infusion plays a role in the pancreatic exocrine secretion via mitogen-activated protein kinase signaling pathway.
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Affiliation(s)
- Kyung-Hoon Lee
- Department of Animal Science and Technology, College of Animal Bioscience and Technology, Konkuk University, Seoul, 05029 South Korea.,Research Department, Korea Industrial Co., Ltd., Pusan, 46978 South Korea
| | - Jae-Sung Lee
- Department of Animal Science and Technology, College of Animal Bioscience and Technology, Konkuk University, Seoul, 05029 South Korea.,Team of Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Konkuk University, Seoul, 05029 South Korea
| | - Tao Wang
- College of Animal Science and Technology, Jilin Agricultural University, Changchun, 130118 China
| | - Jin-Ju Oh
- Natural Product Clinical Research Center, Clinical Research Center, Pusan National University School of Medicine, Busan, 49241 South Korea
| | - Sanggun Roh
- Laboratory of Animal Physiology, Graduate School of Agricultural Science, Tohoku University, Sendai, 981-8555 Japan
| | - Hong-Gu Lee
- Department of Animal Science and Technology, College of Animal Bioscience and Technology, Konkuk University, Seoul, 05029 South Korea.,Team of Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Konkuk University, Seoul, 05029 South Korea
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