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Ning J, Chen J, Zhu Q, Shi M, Chen J, Liu X, Luo X, Yue X. Peptidome profiling of human, bovine, and donkey colostrum through label-free quantitative analysis reveals proteolysis of milk proteins. Food Funct 2024; 15:7161-7173. [PMID: 38888609 DOI: 10.1039/d4fo00689e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/20/2024]
Abstract
Proteins and peptides play vital roles in different biological processes in vivo. As a dynamic hydrolysis system, milk is rich in proteins and proteases and provides a constant supply of endogenous bioactive peptides to newborn mammals. Previous studies have primarily focused on researching bioactive peptides by adding exogenous enzymes to milk samples. However, such an approach overlooks the significance of endogenous peptides and parent proteins that naturally exist in milk. Herein, we analyzed and compared parent proteins and their releasing peptides in human colostrum (HC), bovine colostrum (BC), and donkey colostrum (DC). The predominant proteins and hydrolyzed peptides in the three types of milk were identified. Among them, peptides were found to possess common bioactivities, including ACE inhibitory, antioxidant, antibacterial and immunomodulatory properties in HC, BC, and DC. Furthermore, the biological functions of these parent proteins were clarified using bioinformatics. These insights offer a novel perspective on natural bioactive peptides and the potential utilization of specific parent proteins and peptides to develop infant formulae derived from diverse milk sources.
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Affiliation(s)
- Jianting Ning
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Jialu Chen
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Qing Zhu
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Mingyue Shi
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Jiali Chen
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Xiaoyu Liu
- Department of Obstetrics and Gynaecology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Xue Luo
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Xiqing Yue
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
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Ning J, Yang M, Zhu Q, Liu X, Li M, Luo X, Yue X. Revealing the diversity of endogenous peptides and parent proteins in human colostrum and mature milk through peptidomics analysis. Food Chem 2024; 445:138651. [PMID: 38359565 DOI: 10.1016/j.foodchem.2024.138651] [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: 10/26/2023] [Revised: 01/26/2024] [Accepted: 01/29/2024] [Indexed: 02/17/2024]
Abstract
Endogenous peptides and their parent proteins are important nutritional components with diverse biological functions. The objective of this study was to analyze and compare endogenous peptides and parent proteins found in human colostrum (HC) and human mature milk (HM) using a 4D label-free technique. In total, 5162 and 940 endogenous peptides derived from 258 parent proteins were identified in human milk by database (DB) search and de novo, respectively. Among these peptides, 2446 differentially expressed endogenous peptides with various bioactivities were identified. The Gene Ontology analysis unveiled the cellular components, biological processes, and molecular functions associated with these parent proteins. Metabolic pathway analysis suggested that neutrophil extracellular trap formation had the greatest significance with 24 parent proteins. These findings will offer a fresh perspective on the development of infant formula powder, highlighting the potential for incorporating these changes to enhance its nutritional composition and benefits.
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Affiliation(s)
- Jianting Ning
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Mei Yang
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Qing Zhu
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Xiaoyu Liu
- Department of Obstetrics and Gynaecology, General Hospital of Northern Theater Command, Shenyang 110016, China
| | - Mohan Li
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China
| | - Xue Luo
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
| | - Xiqing Yue
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, China.
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Lyu Y, Kim BJ, Patel JS, Dallas DC, Chen Y. Human Milk Protein-Derived Bioactive Peptides from In Vitro-Digested Colostrum Exert Antimicrobial Activities against Common Neonatal Pathogens. Nutrients 2024; 16:2040. [PMID: 38999788 PMCID: PMC11243250 DOI: 10.3390/nu16132040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 06/16/2024] [Accepted: 06/24/2024] [Indexed: 07/14/2024] Open
Abstract
Human milk reduces risk for necrotizing enterocolitis in preterm infants. Necrotizing enterocolitis occurs in the ileocecal region where thousands of milk protein-derived peptides have been released from digestion. Digestion-released peptides may exert bioactivity, such as antimicrobial and immunomodulatory activities, in the gut. In this study, we applied mass spectrometry-based peptidomics to characterize peptides present in colostrum before and after in vitro digestion. Sequence-based computational modeling was applied to predict peptides with antimicrobial activity. We identified more peptides in undigested samples, yet the abundances were much higher in the digested samples. Heatmapping demonstrated highly different peptide profiles between undigested and digested samples. Four peptides (αS1-casein [157-163], αS1-casein [157-165], β-casein [153-159] and plasminogen [591-597]) were selected, synthesized and tested against common pathogenic bacteria associated with necrotizing enterocolitis. All four exhibited bacteriostatic, though not bactericidal, activities against Klebsiella aerogenes, Citrobacter freundii and Serratia marcescens, but not Escherichia coli.
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Affiliation(s)
- Yang Lyu
- Margaret Ritchie School of Family and Consumer Sciences, University of Idaho, Moscow, ID 83844, USA;
| | - Bum Jin Kim
- Nutrition Program, College of Health, Oregon State University, Corvallis, OR 97331, USA; (B.J.K.); (D.C.D.)
| | - Jagdish Suresh Patel
- Department of Chemical and Biological Engineering, University of Idaho, Moscow, ID 83844, USA;
| | - David C. Dallas
- Nutrition Program, College of Health, Oregon State University, Corvallis, OR 97331, USA; (B.J.K.); (D.C.D.)
| | - Yimin Chen
- Margaret Ritchie School of Family and Consumer Sciences, University of Idaho, Moscow, ID 83844, USA;
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Chu Z, Zhu L, Zhou Y, Yang F, Hu Z, Luo Y, Li W, Luo F. Targeting Nrf2 by bioactive peptides alleviate inflammation: expanding the role of gut microbiota and metabolites. Crit Rev Food Sci Nutr 2024:1-20. [PMID: 38881345 DOI: 10.1080/10408398.2024.2367570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Inflammation is a complex process that usually refers to the general response of the body to the harmful stimuli of various pathogens, tissue damage, or exogenous pollutants. Nuclear factor erythroid 2-related factor 2 (Nrf2) is a transcription factor that regulates cellular defense against oxidative damage and toxicity by expressing genes related to oxidative stress response and drug detoxification. In addition to its antioxidant properties, Nrf2 is involved in many other important physiological processes, including inflammation and metabolism. Nrf2 can bind the promoters of antioxidant genes and upregulates their expressions, which alleviate oxidation-induced inflammation. Nrf2 has been shown to upregulate heme oxygenase-1 expression, which promotes NF-κB activation and is closely related with inflammation. Nrf2, as a key factor in antioxidant response, is closely related to the expressions of pro-inflammatory factors, NF-κB pathway and cell metabolism. Bioactive peptides come from a wide range of sources and have many biological functions. Increasing evidence indicates that bioactive peptides have potential anti-inflammatory activities. This article summarized the sources, absorption and utilization of bioactive peptides and their role in alleviating inflammation via Nrf2 pathway. Bioactive peptides can also regulate gut microbiota and alter metabolites, which regulates the Nrf2 pathway through novel pathway and supplement the anti-inflammatory mechanisms of bioactive peptides. This review provides a reference for further study on the anti-inflammatory effect of bioactive peptides and the development and utilization of functional foods.
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Affiliation(s)
- Zhongxing Chu
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Lingfeng Zhu
- Hunan Agricultural Product Processing Institute, Hunan Academy of Agricultural Sciences, Changsha, Hunan, China
| | - Yaping Zhou
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Feiyan Yang
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Zuomin Hu
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Yi Luo
- Department of Clinic Medicine, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Wen Li
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
| | - Feijun Luo
- Hunan Key Laboratory of Grain-oil Deep Process and Quality Control, Hunan Key Laboratory of Forestry Edible Resources Safety and Processing, Central South University of Forestry and Technology, Changsha, Hunan, China
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Ning J, Yang M, Liu W, Luo X, Yue X. Proteomics and Peptidomics As a Tool to Compare the Proteins and Endogenous Peptides in Human, Cow, and Donkey Milk. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:16435-16451. [PMID: 37882656 DOI: 10.1021/acs.jafc.3c04534] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2023]
Abstract
Cow's milk is the most widely used ingredient in infant formulas. However, its specific protein composition can cause allergic reactions. Finding alternatives to replace cow's milk and fill the nutritional gap with human milk is essential for the health of infants. Proteomic and peptidomic techniques have supported the elucidation of milk's nutritional ingredients. Recently, omics approaches have attracted increasing interest in the investigation of milk because of their high throughput, precision, sensitivity, and reproducibility. This review offers a significant overview of recent developments in proteomics and peptidomics used to study the differences in human, cow, and donkey milk. All three types of milks were identified to have critical biological functions in human health, particularly in infants. Donkey milk proteins were closer in composition to human milk, were less likely to cause allergic reactions, and may be developed as novel raw materials for formula milk powders.
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Affiliation(s)
- Jianting Ning
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Mei Yang
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Wanting Liu
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Xue Luo
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
| | - Xiqing Yue
- College of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China
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Abstract
Human breast milk is the optimal nutrition for all infants and is comprised of many bioactive and immunomodulatory components. The components in human milk, such as probiotics, human milk oligosaccharides (HMOs), extracellular vesicles, peptides, immunoglobulins, growth factors, cytokines, and vitamins, play a critical role in guiding neonatal development beyond somatic growth. In this review, we will describe the bioactive factors in human milk and discuss how these factors shape neonatal immunity, the intestinal microbiome, intestinal development, and more from the inside out.
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Affiliation(s)
- Sarah F Andres
- Department of Pediatrics, Pediatric GI Division, School of Medicine, Oregon Health and Science University, Portland, OR 97229, United States
| | - Brian Scottoline
- Division of Neonatology, Department of Pediatrics, Oregon Health & Science University, Portland, OR 97239, United States
| | - Misty Good
- Division of Neonatal-Perinatal Medicine, Department of Pediatrics, University of North Carolina at Chapel Hill, 101 Manning Drive, Campus Box 7596, Chapel Hill, NC 27599, United States.
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Peptidomics as a tool to analyze endogenous peptides in milk and milk-related peptides. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Caira S, Picariello G, Renzone G, Arena S, Troise AD, De Pascale S, Ciaravolo V, Pinto G, Addeo F, Scaloni A. Recent developments in peptidomics for the quali-quantitative analysis of food-derived peptides in human body fluids and tissues. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Lyu Y, Chen Y. Digested Human Colostrum Reduces Interleukin-8 Production in Induced Human Intestinal Epithelial Cells. Nutrients 2022; 14:nu14142787. [PMID: 35889744 PMCID: PMC9324903 DOI: 10.3390/nu14142787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 06/23/2022] [Accepted: 07/04/2022] [Indexed: 11/16/2022] Open
Abstract
Little is known about the impact of human colostrum on infant intestinal health following digestion. The aim of this study was to compare the effect of digested versus undigested human colostrum on inflammation and cytotoxicity in human intestinal epithelial cells (Caco2BBe) stimulated with lipopolysaccharides (LPS) or tumor necrosis factor (TNF). Colostrum samples (days 2–8 postpartum) from ten mothers of preterm infant were applied. Caco2BBe cells were pretreated by digested or undigested colostrum before stimulation with LPS or TNF. The inflammatory response was determined by measuring the production of interleukin-8 (IL-8) from cells using enzyme linked immunosorbent assay (ELISA). Cytotoxicity was examined by measuring the release of lactate dehydrogenase (LDH) from the cells. Digested colostrum significantly reduced IL-8 production under LPS and TNF stimulation compared with undigested colostrum. Individual colostrum samples exhibited wide variance in the ability to suppress IL-8 production and cytotoxicity in Caco2BBe cells. In vitro-digested human colostrum suppressed an inflammatory response more than undigested human colostrum in an induced intestinal cell culture model.
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Liang N, Kim BJ, Dallas DC. Bioavailability of Peptides Derived from the In Vitro Digestion of Human Milk Assessed by Caco-2 Cell Monolayers. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:7077-7084. [PMID: 35608530 DOI: 10.1021/acs.jafc.2c01246] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Human milk-protein-derived peptides exhibit an array of bioactivities. Certain bioactivities cannot be exerted unless the peptides are absorbed across the gastrointestinal lumen into the bloodstream. The purpose of study was to determine which peptides derived from in vitro digestion of human milk could cross human intestinal Caco-2 cell monolayers. Our results showed that the numbers of peptides absorbed by the Caco-2 cell monolayer were different at different concentrations (44 peptides out of 169 peptides detected at 10 μg/mL, 124 peptides out of 204 peptides detected at 100 μg/mL, and 175 peptides out of 236 peptides detected at 1000 μg/mL). Four peptides (NLHLPLP (β-casein [138-144]), PLAPVHNPI (β-casein [216-224]), PLMQQVPQPIPQ (β-casein [148-159]), and FDPQIPK (β-casein [126-132])) crossed to the basolateral chamber of the Caco-2 monolayer incubated with peptides at all three concentrations. Among the peptides identified in the basolateral chambers, three peptides (NLHLPLP (β-casein [138-144]), LENLHLPLP (β-casein [136-144]), and QVVPYPQ (β-casein [182-188])) are known ACE-inhibitors; one peptide (LLNQELLLNPTHQIYPV (β-casein [197-213])) is antimicrobial, and another peptide (QVVPYPQ (β-casein [182-188])) has antioxidant activity. These findings indicate that specific milk peptides may be able to reach the bloodstream and exert bioactivity.
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Affiliation(s)
- Ningjian Liang
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, Oregon 97331, United States
| | - Bum Jin Kim
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, Oregon 97331, United States
| | - David C Dallas
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, Oregon 97331, United States
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Zhu J, Liu M, Xing Y. Preterm birth and human milk proteome: are we ready for individualized fortification? Curr Opin Clin Nutr Metab Care 2022; 25:216-222. [PMID: 35199659 DOI: 10.1097/mco.0000000000000824] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE OF REVIEW Preterm birth is one of the most pressing clinical problems in obstetrics and neonatology worldwide. One of the most sophisticated components of human milk is the proteome and a better understanding of it can lead to precision guides for feeding preterm infants. In this review, we will examine recent research focused on the human milk proteome and individualized protein fortification of human milk. RECENT FINDINGS In both preterm and term birth, the protein content in mother's own milk dropped rapidly in the early postnatal period. Preterm milk had a higher protein content and contained different protein and endogenous peptide compositions compared with term milk. The peptides in gastrointestinal fluids of preterm infants still need further investigation. Individualized fortification is more superior to standard fortification, but it only focuses on the total protein amount. There is no data concerning the composition and posttranslational modifications of proteins and endogenous peptides with fortification and their longterm effects. SUMMARY Comprehensive identification and characterization of the human milk proteome have led to the targeted breast milk fortification theory of preterm infant feeding and has also been enriched by clinical trials. However, to achieve fortification of key proteins and/or endogenous peptides, as standard clinical practice, requires additional studies. Future research should explore the long-term effect of protein fortification and pay more attention to quality rather than quantity in relation to infant body composition and growth outcomes.
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Affiliation(s)
- Jing Zhu
- Beijing Institute of Nutritional Resources, Beijing Academy of Science and Technology
| | - Mengyuan Liu
- Department of Pediatrics, Peking University Third Hospital, Beijing, China
| | - Yan Xing
- Department of Pediatrics, Peking University Third Hospital, Beijing, China
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Monitoring Human Milk β-Casein Phosphorylation and O-Glycosylation Over Lactation Reveals Distinct Differences between the Proteome and Endogenous Peptidome. Int J Mol Sci 2021; 22:ijms22158140. [PMID: 34360914 PMCID: PMC8347866 DOI: 10.3390/ijms22158140] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 07/20/2021] [Accepted: 07/22/2021] [Indexed: 12/15/2022] Open
Abstract
Human milk is a vital biofluid containing a myriad of molecular components to ensure an infant’s best start at a healthy life. One key component of human milk is β-casein, a protein which is not only a structural constituent of casein micelles but also a source of bioactive, often antimicrobial, peptides contributing to milk’s endogenous peptidome. Importantly, post-translational modifications (PTMs) like phosphorylation and glycosylation typically affect the function of proteins and peptides; however, here our understanding of β-casein is critically limited. To uncover the scope of proteoforms and endogenous peptidoforms we utilized mass spectrometry (LC-MS/MS) to achieve in-depth longitudinal profiling of β-casein from human milk, studying two donors across 16 weeks of lactation. We not only observed changes in β-casein’s known protein and endogenous peptide phosphorylation, but also in previously unexplored O-glycosylation. This newly discovered PTM of β-casein may be important as it resides on known β-casein-derived antimicrobial peptide sequences.
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Beverly RL, Woonnimani P, Scottoline BP, Lueangsakulthai J, Dallas DC. Peptides from the Intestinal Tract of Breast Milk-Fed Infants Have Antimicrobial and Bifidogenic Activity. Int J Mol Sci 2021; 22:ijms22052377. [PMID: 33673498 PMCID: PMC7956819 DOI: 10.3390/ijms22052377] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 12/17/2022] Open
Abstract
For bioactive milk peptides to be relevant to infant health, they must be released by gastrointestinal proteolysis and resist further proteolysis until they reach their site of activity. The intestinal tract is the likeliest site for most bioactivities, but it is currently unknown whether bioactive milk peptides are present therein. The purpose of the present study was to identify antimicrobial and bifidogenic peptides in the infant intestinal tract. Milk peptides were extracted from infant intestinal samples, and the activities of the bulk peptide extracts were determined by measuring growth of Escherichia coli, Staphylococcus aureus, and Bifidobacterium longum spp. infantis after incubation with serial dilutions. The peptide profiles of active and inactive samples were determined by peptidomics analysis and compared to identify candidate peptides for bioactivity testing. We extracted peptides from 29 intestinal samples collected from 16 infants. Five samples had antimicrobial activity against S. aureus and six samples had bifidogenic activity for B. infantis. We narrowed down a list of 6645 milk peptides to 11 candidate peptides for synthesis, of which 6 fully inhibited E. coli and S. aureus growth at concentrations of 2500 and 3000 µg/mL. This study provides evidence for the potential bioactivity of milk peptides in the infant intestinal tract.
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Affiliation(s)
- Robert L. Beverly
- College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA; (J.L.); (D.C.D.)
- Correspondence: ; Tel.: +1-217-2278-2672
| | - Prajna Woonnimani
- College of Agricultural Sciences, Oregon State University, Corvallis, OR 97331, USA;
| | - Brian P. Scottoline
- Division of Neonatology, School of Medicine, Oregon Health and Science University, Portland, OR 97239, USA;
| | - Jiraporn Lueangsakulthai
- College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA; (J.L.); (D.C.D.)
| | - David C. Dallas
- College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA; (J.L.); (D.C.D.)
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