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Körner A, Bazzone A, Wichert M, Barthmes M, Dondapati SK, Fertig N, Kubick S. Unraveling the kinetics and pharmacology of human PepT1 using solid supported membrane-based electrophysiology. Bioelectrochemistry 2024; 155:108573. [PMID: 37748262 DOI: 10.1016/j.bioelechem.2023.108573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 09/14/2023] [Accepted: 09/15/2023] [Indexed: 09/27/2023]
Abstract
The human Peptide Transporter 1 (hPepT1) is known for its broad substrate specificity and its ability to transport (pro-)drugs. Here, we present an in-depth comprehensive study of hPepT1 and its interactions with various substrates via solid supported membrane-based electrophysiology (SSME). Using hPepT1-containing vesicles, we could not identify any peptide induced pre-steady-state currents, indicating that the recorded peak currents reflect steady-state transport. Electrogenic co-transport of H+/glycylglycine (GlyGly) was observed across a pH range of 5.0 to 9.0. The pH dependence is described by a bell-shaped activity curve and two pK values. KM and relative Vmax values of various canonical and non-canonical peptide substrates were contextualized with current mechanistic understandings of hPepT1. Finally, specific inhibition was observed for various inhibitors in a high throughput format, and IC50 values are reported. Taken together, these findings contribute to promoting the design and analysis of pharmacologically relevant substances.
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Affiliation(s)
- Alexander Körner
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany; Institute of Biotechnology, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany
| | - Andre Bazzone
- Nanion Technologies GmbH, Ganghoferstr. 70a, 80339 Munich, Germany
| | - Maximilian Wichert
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany; Freie Universität Berlin, Institute of Chemistry and Biochemistry - Biochemistry, 14195 Berlin, Germany
| | - Maria Barthmes
- Nanion Technologies GmbH, Ganghoferstr. 70a, 80339 Munich, Germany
| | - Srujan Kumar Dondapati
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany.
| | - Niels Fertig
- Nanion Technologies GmbH, Ganghoferstr. 70a, 80339 Munich, Germany
| | - Stefan Kubick
- Fraunhofer Institute for Cell Therapy and Immunology (IZI), Branch Bioanalytics and Bioprocesses (IZI-BB), Am Mühlenberg 13, 14476 Potsdam, Germany; Freie Universität Berlin, Institute of Chemistry and Biochemistry - Biochemistry, 14195 Berlin, Germany; Faculty of Health Sciences, Joint Faculty of the Brandenburg University of Technology Cottbus - Senftenberg, The Brandenburg Medical School Theodor Fontane and the University of Potsdam, Germany
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2
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Liu H, Wei X, Dai W, Xu L, Wang C, Liu J. The functional and regulatory entities underlying free and peptide-bound amino acid transporters in the bovine mammary gland. JDS COMMUNICATIONS 2023; 4:235-239. [PMID: 37360116 PMCID: PMC10285241 DOI: 10.3168/jdsc.2022-0292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 12/03/2022] [Indexed: 06/28/2023]
Abstract
Free and peptide-bound AA act as building blocks and key regulators of milk protein. To improve milk protein production, mammary epithelial cells of lactating mammals require extensive AA movement across the plasma membrane via multiple transport systems. Recent studies on bovine mammary cells/tissues have expanded the number of AA transporter systems identified and the knowledge on their contribution to AA utilization for milk protein synthesis and the regulatory machinery. However, in lactating cows, the exact intracellular location of mammary AA transporters and the extent of mammary net AA utilization for milk protein production remain unclear. This review highlights the existing knowledge on various characteristics, such as substrate specificity, kinetics, their effects on AA uptake and utilization, and regulatory mechanism, of recently examined bovine mammary free and peptide-bound AA transporters.
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Affiliation(s)
- H.Y. Liu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, P.R. China
| | - X.S. Wei
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, P.R. China
- College of Animal Science and Technology & College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - W.T. Dai
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, P.R. China
| | - L.B. Xu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, P.R. China
| | - C. Wang
- College of Animal Science and Technology & College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
| | - J.X. Liu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, P.R. China
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3
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Shukla P, Chopada K, Sakure A, Hati S. Current Trends and Applications of Food-derived Antihypertensive
Peptides for the Management of Cardiovascular Disease. Protein Pept Lett 2022; 29:408-428. [DOI: 10.2174/0929866529666220106100225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 10/26/2021] [Accepted: 11/20/2021] [Indexed: 11/22/2022]
Abstract
Abstract:
Food derived Antihypertensive peptides is considered as a natural supplement for controlling the hypertension. Food protein not only serve as a macronutrient but also act as raw material for biosynthesis of physiologically active peptides. Food sources like milk and milk products, animal protein such as meat, chicken, fish, eggs and plant derived proteins from soy, rice, wheat, mushroom, pumpkins contain high amount of antihypertensive peptides. The food derived antihypertensive peptides has ability to supress the action of rennin and Angiotesin converting enzyme (ACE) which is mainly involved in regulation of blood pressure by RAS. The biosynthesis of endothelial nitric oxide synthase is also improved by ACE inhibitory peptides which increase the production of nitric oxide in vascular walls and encourage vasodilation. Interaction between the angiotensin II and its receptor is also inhibited by the peptides which help to reduce hypertension. This review will explore the novel sources and applications of food derived peptides for the management of hypertension.
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Affiliation(s)
- Pratik Shukla
- Department of Dairy Microbiology, SMC College of Dairy Science, Anand Agricultural University, Anand- 388110,
Gujarat, India
| | - Keval Chopada
- Department of Dairy Microbiology, SMC College of Dairy Science, Anand Agricultural University, Anand- 388110,
Gujarat, India
| | - Amar Sakure
- Department of Agricultural Biotechnology, Anand Agricultural University, Anand- 388110, Gujarat,
India
| | - Subrota Hati
- Department of Dairy Microbiology, SMC College of Dairy Science, Anand Agricultural University, Anand- 388110,
Gujarat, India
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4
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Kong F, Liu Y, Wang S, Zhang Y, Wang W, Yang H, Lu N, Li S. Nutrient Digestibility, Microbial Fermentation, and Response in Bacterial Composition to Methionine Dipeptide: An In Vitro Study. BIOLOGY 2022; 11:biology11010093. [PMID: 35053091 PMCID: PMC8772947 DOI: 10.3390/biology11010093] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 01/05/2022] [Accepted: 01/06/2022] [Indexed: 11/20/2022]
Abstract
Simple Summary The rumen microbiota plays an important role in maintaining microbiota homeostasis and promoting milk production synthesis through utilizing amino acids and non-protein nitrogen. Furthermore, various nitrogen sources have shown distinct effects on microbial growth rates. The methionine dipeptide (MD) is a bioactive peptide consisting of two methionine (Met) residues linked by a peptide bond. Although the role of MD in milk protein synthesis is established, little is known about its role in bacterial fermentation. The present study demonstrates that the various nitrogen sources could reshape microbiota differently, and MD could be more efficient than free Met in the rumen to support acetate producer growth. Our study provides some new insights into the relationship between ruminal microbiota of dairy cows and small peptides and points to potential strategies to effectively enhance the health condition and digestion ability of dairy cows. Abstract It is well known that the methionine dipeptide (MD) could enhance the dairy cows milking performance. However, there is still a knowledge gap of the effects of MD on the rumen fermentation characteristics, microbiota composition, and digestibility. This experiment was conducted to determine the effect of different nitrogen sources with a total mixed ration on in vitro nutrient digestibility, fermentation characteristics, and bacterial composition. The treatments included 5 mg urea (UR), 25.08 mg methionine (Met), 23.57 mg MD, and no additive (CON) in fermentation culture medium composed of buffer solution, filtrated Holstein dairy cow rumen fluid, and substrate (1 g total mixed ration). Nutrient digestibility was measured after 24 h and 48 h fermentation, and fermentation parameters and microbial composition were measured after 48 h fermentation. Digestibility of dry matter, crude protein, neutral detergent fiber (NDF), and acid detergent fiber (ADF) in the MD group at 48 h were significantly higher than in the CON and UR groups. The total volatile fatty acid concentration was higher in the MD group than in the other groups. In addition, 16S rRNA microbial sequencing results showed MD significantly improved the relative abundances of Succinivibrio, Anaerotruncus, and Treponema_2, whereas there was no significant difference between Met and UR groups. Spearman’s correlation analysis showed the relative abundance of Succinivibrio and Anaerotruncus were positively correlated with gas production, NDF digestibility, ADF digestibility, and acetate, propionate, butyrate, and total volatile fatty acid concentrations. Overall, our results suggested that the microbiota in the fermentation system could be affected by additional nitrogen supplementation and MD could effectively enhance the nutrient utilization in dairy cows.
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Affiliation(s)
- Fanlin Kong
- The State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (F.K.); (S.W.); (W.W.); (H.Y.)
| | - Yanfang Liu
- Beijing Jingwa Agricultural Science & Technology Innovation Center, Beijing 100193, China;
| | - Shuo Wang
- The State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (F.K.); (S.W.); (W.W.); (H.Y.)
| | - Yijia Zhang
- Laboratory of Anatomy of Domestic Animals, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China;
| | - Wei Wang
- The State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (F.K.); (S.W.); (W.W.); (H.Y.)
| | - Hongjian Yang
- The State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (F.K.); (S.W.); (W.W.); (H.Y.)
| | - Na Lu
- Beijing Jingwa Agricultural Science & Technology Innovation Center, Beijing 100193, China;
- Correspondence: (N.L.); (S.L.); Tel.: +86-10-62731254 (S.L.)
| | - Shengli Li
- The State Key Laboratory of Animal Nutrition, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China; (F.K.); (S.W.); (W.W.); (H.Y.)
- Correspondence: (N.L.); (S.L.); Tel.: +86-10-62731254 (S.L.)
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5
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Zhou M, Liu G, Liu W, Zhu M, Wang C. Cloning, tissue distribution and functional characterization of the donkey (Equus asinus) oligopeptide transporter 2. J Anim Physiol Anim Nutr (Berl) 2021; 105:1165-1172. [PMID: 34314070 DOI: 10.1111/jpn.13615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 05/22/2021] [Accepted: 07/13/2021] [Indexed: 11/29/2022]
Abstract
Oligopeptide transporter 2 (PepT2) is an important transporter of oligopeptides. In the present study, we describe the molecular cloning, tissue distribution and functional characterization of a donkey (Equus asinus) PepT2. The cloned cDNA sequence was 2202 bp at full length, encoding a 733 amino acid peptide with a molecular weight of 81.9 kDa and a theoretical pI of 8.92. Bioinformatics analysis showed that the deduced peptide sequence possessed all the characteristic features of PepT2. The expression of PepT2 in the kidney and lung was significantly higher than that observed in the ileum, duodenum, jejunum, spleen, liver, heart and stomach. Functional characterization by heterologous expression in Chinese hamster ovary cells showed that the uptake of β-Ala-Lys-N-7-amino-4-methylcoumarin-3-acetic acid (β-Ala-Lys-AMCA) by donkey PepT2-Chinese hamster ovary cells was dependent on time, pH and substrate concentration, with a low Km value of 91.51 ± 14.14 μM and a maximum velocity of 41.37 ± 2.193 pmol/min/mg protein. In the present study, for the first time, the expression and functional characteristics of donkey PepT2 were evaluated, the results of which provide new insights and a better understanding of its crucial role in oligopeptide transport in donkeys.
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Affiliation(s)
- Miaomiao Zhou
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, College of Agriculture, Liaocheng University, Liaocheng, China
| | - Guiqin Liu
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, College of Agriculture, Liaocheng University, Liaocheng, China
| | - Wenqiang Liu
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, College of Agriculture, Liaocheng University, Liaocheng, China
| | - Mingxia Zhu
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, College of Agriculture, Liaocheng University, Liaocheng, China
| | - Changfa Wang
- Liaocheng Research Institute of Donkey High-Efficiency Breeding and Ecological Feeding, College of Agriculture, Liaocheng University, Liaocheng, China
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Amigo L, Hernández-Ledesma B. Current Evidence on the Bioavailability of Food Bioactive Peptides. Molecules 2020; 25:E4479. [PMID: 33003506 PMCID: PMC7582556 DOI: 10.3390/molecules25194479] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 09/25/2020] [Accepted: 09/25/2020] [Indexed: 12/23/2022] Open
Abstract
Food protein-derived bioactive peptides are recognized as valuable ingredients of functional foods and/or nutraceuticals to promote health and reduce the risk of chronic diseases. However, although peptides have been demonstrated to exert multiple benefits by biochemical assays, cell culture, and animal models, the ability to translate the new findings into practical or commercial uses remains delayed. This fact is mainly due to the lack of correlation of in vitro findings with in vivo functions of peptides because of their low bioavailability. Once ingested, peptides need to resist the action of digestive enzymes during their transit through the gastrointestinal tract and cross the intestinal epithelial barrier to reach the target organs in an intact and active form to exert their health-promoting properties. Thus, for a better understanding of the in vivo physiological effects of food bioactive peptides, extensive research studies on their gastrointestinal stability and transport are needed. This review summarizes the most current evidence on those factors affecting the digestive and absorptive processes of food bioactive peptides, the recently designed models mimicking the gastrointestinal environment, as well as the novel strategies developed and currently applied to enhance the absorption and bioavailability of peptides.
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Affiliation(s)
| | - Blanca Hernández-Ledesma
- Department of Bioactivity and Food Analysis, Institute of Research in Food Sciences (CIAL, CSIC-UAM, CEI-UAM+CSIC), Nicolás Cabrera 9, 28049 Madrid, Spain;
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7
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Zhu W, Ren L, Zhang L, Qiao Q, Farooq MZ, Xu Q. The Potential of Food Protein-Derived Bioactive Peptides against Chronic Intestinal Inflammation. Mediators Inflamm 2020; 2020:6817156. [PMID: 32963495 PMCID: PMC7499337 DOI: 10.1155/2020/6817156] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 08/25/2020] [Indexed: 12/18/2022] Open
Abstract
Inflammation can cause various chronic diseases like inflammatory bowel diseases. Various food protein-derived bioactive peptides (BAPs) with anti-inflammatory activity have the potential to manage these diseases. The aim of this paper is to overview the mechanisms and the molecular targets of BAPs to exert anti-inflammatory activity. In this review, the in vitro and in vivo effects of BAPs on intestinal inflammation are highlighted. The mechanism, pathways, and future perspectives of BAPs as the potential sources of therapeutic treatments to alleviate intestinal inflammation are provided, including nuclear factor-κB, mitogen-activated protein kinase, Janus kinase-signal transducer and activator of transcription, and peptide transporter 1 (PepT1), finding that PepT1 and gut microbiota are the promising targets for BAPs to alleviate the intestinal inflammation. This review provides a comprehensive understanding of the role of dietary BAPs in attenuating inflammation and gives a novel direction in nutraceuticals for people or animals with intestinal inflammation.
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Affiliation(s)
- Wanying Zhu
- Shanxian Central Hospital, Heze 274300, China
| | - Liying Ren
- Shanxian Central Hospital, Heze 274300, China
| | - Li Zhang
- Shanxian Central Hospital, Heze 274300, China
| | - Qinqin Qiao
- College of Information Engineering, Fuyang Normal University, Fuyang 236000, China
| | - Muhammad Zahid Farooq
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qingbiao Xu
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan 430070, China
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China
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8
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Wang C, Zhao FQ, Liu J, Liu H. Short communication: The essential role of N-glycosylation in the transport activity of bovine peptide transporter 2. J Dairy Sci 2020; 103:6679-6683. [PMID: 32331895 DOI: 10.3168/jds.2019-16858] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 02/18/2020] [Indexed: 12/19/2022]
Abstract
Bovine peptide transporter 2 (bPepT2), which mediates the absorption of di- and tripeptides in the bovine mammary gland, was predicted to contain multiple putative N-glycosylation sites of asparagine residues. N-Linked glycosylation is proven to be essential for the folding, stability, localization, and substrate binding of nutrient transporters and could therefore potentially have an essential role in the function of bPepT2. This study investigated the effect of mutagenesis of N-glycosylation sites on the transport function of bPepT2 in Chinese hamster ovary (CHO) cells. The bPepT2 cDNA was cloned and sequenced. BioXM (http://202.195.246.60/BioXM/) and TMHMM (http://www.cbs.dtu.dk/services/TMHMM-2.0/) software were used to predict the AA composition and transmembrane domain of bPepT2, respectively. The AA sequence of bPepT2 was predicted to have 12 transmembrane domains, with a large extracellular loop between the ninth and tenth transmembrane domains. All 5 putative N-glycosylation sites in this loop were altered by site-directed mutagenesis, and the mutant construct was transfected into CHO cells for transport activity assay. Compared with the wild type, the bPepT2 mutant had significantly lower uptake activity of β-alanyl-l-lysyl-Nε-7-amino-4-methyl-coumarin-3-acetic acid (β-Ala-Lys-AMCA), a model dipeptide. Treatment with tunicamycin, an inhibitor of N-linked glycosylation, reduced the uptake of β-Ala-Lys-AMCA in CHO cells relative to the control group. Kinetic studies indicated that the Michaelis constant of bPepT2 was not affected by the mutation (98.03 ± 8.30 and 88.33 ± 4.23 µM for the wild type and the mutant, respectively), but the maximum transport activity was significantly reduced (40.29 ± 8.30 and 13.02 ± 2.95 pmol/min per milligram of protein for the wild type and the mutant, respectively). In summary, this study demonstrated that N-glycosylation is critical for the function of bPepT2.
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Affiliation(s)
- Caihong Wang
- College of Animal Science, Zhejiang University, Hangzhou 310058, China
| | - Feng-Qi Zhao
- College of Animal Science, Zhejiang University, Hangzhou 310058, China; Department of Animal and Veterinary Sciences, University of Vermont, Burlington 05405
| | - Jianxin Liu
- College of Animal Science, Zhejiang University, Hangzhou 310058, China
| | - Hongyun Liu
- College of Animal Science, Zhejiang University, Hangzhou 310058, China.
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9
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Differences in the immunoreactivity of milk from local farms and from points of purchase. Eur Food Res Technol 2019. [DOI: 10.1007/s00217-019-03400-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Xu Q, Hong H, Wu J, Yan X. Bioavailability of bioactive peptides derived from food proteins across the intestinal epithelial membrane: A review. Trends Food Sci Technol 2019. [DOI: 10.1016/j.tifs.2019.02.050] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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11
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Xu Q, Liu H, Zhao F, Wu Y, Huang X, Liu Z, Liu J. Mechanism of peptide absorption in the isolated forestomach epithelial cells of dairy cows. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:100-108. [PMID: 29797328 DOI: 10.1002/jsfa.9148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 03/19/2018] [Accepted: 05/20/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Peptide absorption from the forestomach plays a vital role in protein nutrition of dairy cows. This study was conducted to investigate the mechanism of dipeptide absorption in the forestomach of dairy cows using isolated omasal epithelial cells (OECs) and ruminal epithelial cells (RECs). RESULTS Compared with RECs, the OECs formed a less tight monolayer, but had greater ability to transport glycylsarcosine (Gly-Sar) (P < 0.05). The OEC monolayers were immunopositive for the antibodies of anti-junction proteins. Gly-Sar transport was significantly greater at 37 °C than that at 4 °C, with an optimal pH of 6.0-6.5, and was decreased significantly by diethylpyrocarbonate and dipeptide Met-Gly (P < 0.05). The apical-to-basolateral transport was significantly greater than basolateral-to-apical transport (P < 0.05). Knockdown of peptide transporter 1 (PepT1) resulted in less Gly-Sar uptake in OECs, whereas overexpression of PepT1 in OECs resulted in higher Gly-Sar uptake (P < 0.05). Additionally, the expression of PepT1 was upregulated by the treatment with various dipeptides (P < 0.05). CONCLUSION The OECs have a greater ability to transport Gly-Sar than RECs do. Both passive and active routes are involved in the process of Gly-Sar absorption in the isolated cultured forestomach epithelial cells from dairy cows. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Qingbiao Xu
- Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou, China
- College of Animal Sciences and Technology, Huazhong Agricultural University, Wuhan, China
| | - Hongyun Liu
- Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Fengqi Zhao
- Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou, China
- Department of Animal and Veterinary Sciences, Laboratory of Lactation and Metabolic Physiology, University of Vermont, Burlington, VT, USA
| | - Yueming Wu
- Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Xinbei Huang
- Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Zhixuan Liu
- Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Jianxin Liu
- Institute of Dairy Science, MoE Key Laboratory of Molecular Animal Nutrition, College of Animal Sciences, Zhejiang University, Hangzhou, China
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12
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Xu Q, Yan X, Zhang Y, Wu J. Current understanding of transport and bioavailability of bioactive peptides derived from dairy proteins: a review. Int J Food Sci Technol 2018. [DOI: 10.1111/ijfs.14055] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Qingbiao Xu
- College of Animal Sciences and Technology Huazhong Agricultural University Wuhan 430070 China
- Department of Agricultural, Food and Nutritional Science University of Alberta Edmonton Alberta T6G 2P5 Canada
| | - Xianghua Yan
- College of Animal Sciences and Technology Huazhong Agricultural University Wuhan 430070 China
| | - Yangdong Zhang
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100193 China
| | - Jianping Wu
- Department of Agricultural, Food and Nutritional Science University of Alberta Edmonton Alberta T6G 2P5 Canada
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