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Supplementing human milk with a donkey or bovine milk derived fortifier: consequences on proteolysis, lipolysis and particle structure under in vitro dynamic digestion. Food Chem 2022; 395:133579. [DOI: 10.1016/j.foodchem.2022.133579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Revised: 06/21/2022] [Accepted: 06/24/2022] [Indexed: 11/22/2022]
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Chen Y, Kim BJ, Dallas DC. Proteomics analysis reveals digestion-resistant proteins from colostrum are associated with inflammatory and cytotoxic responses in intestinal epithelial cells. JPEN J Parenter Enteral Nutr 2021; 46:1119-1129. [PMID: 34687453 DOI: 10.1002/jpen.2285] [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: 07/22/2021] [Revised: 09/22/2021] [Accepted: 10/19/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND Although human-milk feeding reduces the risk of necrotizing enterocolitis (NEC) in preterm infants compared with formula feeding, the exact risk-reduction mechanism remains unknown. As NEC occurs at the distal small intestine in which digestion has occurred, we applied proteomics to examine the extent to which colostrum proteins survive simulated infant in vitro-digestion and, thus, have potential to exert biological function. METHODS Ten preterm colostrum samples were left undigested or in vitro-digested, and lipopolysaccharide (LPS)-binding protein, soluble cluster of differentiation 14, and tumor necrosis factor (TNF) receptors I and II were measured using enzyme-linked immunosorbent assay in all undigested and in vitro-digested samples. Fully differentiated Caco-2 cells were exposed to digested colostrum samples before stimulation with LPS or TNF or no stimulation. Inflammation (interleukin-8) and cytotoxicity (lactate dehydrogenase) were measured. Proteomic analyses of undigested and in vitro-digested samples were done using mass spectrometry. RESULTS We found that most proteins in colostrum are significantly, if not completely, degraded after in vitro-digestion. We found select individual and combination digestion-resistant proteins that were positively correlated with LPS- and TNF-induced inflammation. CONCLUSION These results indicate the importance of considering the extent to which specific dietary compounds survive digestion to reach their site of claimed action (distal intestine) and that some digestion-resistant proteins may be contributing toward "low-grade" inflammation that is necessary to promote intestinal growth and maturation during early infancy. This work provides the most detailed understanding of human-milk protein degradation with simulated infant in vitro-digestion to date.
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Affiliation(s)
- Yimin Chen
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, Illinois, USA.,Margaret Ritchie School of Family and Consumer Sciences, University of Idaho, Moscow, Idaho, USA
| | - Bum Jin Kim
- Oregon State University, Corvallis, Oregon, USA
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Lipid Composition, Digestion, and Absorption Differences among Neonatal Feeding Strategies: Potential Implications for Intestinal Inflammation in Preterm Infants. Nutrients 2021; 13:nu13020550. [PMID: 33567518 PMCID: PMC7914900 DOI: 10.3390/nu13020550] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/03/2021] [Accepted: 02/05/2021] [Indexed: 12/18/2022] Open
Abstract
Necrotizing enterocolitis (NEC) is a significant cause of morbidity and mortality in the neonatal population. Formula feeding is among the many risk factors for developing the condition, a practice often required in the cohort most often afflicted with NEC, preterm infants. While the virtues of many bioactive components of breast milk have been extolled, the ability to digest and assimilate the nutritional components of breast milk is often overlooked. The structure of formula differs from that of breast milk, both in lipid composition and chemical configuration. In addition, formula lacks a critical digestive enzyme produced by the mammary gland, bile salt-stimulated lipase (BSSL). The gastrointestinal system of premature infants is often incapable of secreting sufficient pancreatic enzymes for fat digestion, and pasteurization of donor milk (DM) has been shown to inactivate BSSL, among other important compounds. Incompletely digested lipids may oxidize and accumulate in the distal gut. These lipid fragments are thought to induce intestinal inflammation in the neonate, potentially hastening the development of diseases such as NEC. In this review, differences in breast milk, pasteurized DM, and formula lipids are highlighted, with a focus on the ability of those lipids to be digested and subsequently absorbed by neonates, especially those born prematurely and at risk for NEC.
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Pica V, Stuknytė M, Masotti F, De Noni I, Cattaneo S. Bovine milk fortifiers and fortified pasteurized donor human milk for premature infant nutrition. Peptidomic overview. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Nielsen SD, Beverly RL, Underwood MA, Dallas DC. Differences and Similarities in the Peptide Profile of Preterm and Term Mother's Milk, and Preterm and Term Infant Gastric Samples. Nutrients 2020; 12:E2825. [PMID: 32942688 PMCID: PMC7551100 DOI: 10.3390/nu12092825] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 09/08/2020] [Accepted: 09/10/2020] [Indexed: 12/14/2022] Open
Abstract
Our previous studies revealed that milk proteases begin to hydrolyze proteins in the mammary gland and that proteolytic digestion continues within the infant stomach. No research has measured how the release of milk peptides differs between the gastric aspirates of term and premature infants. This study examined the presence of milk peptides in milk and gastric samples from term and preterm infants using an Orbitrap Fusion Lumos mass spectrometer. Samples were collected from nine preterm-delivering and four term-delivering mother-infant pairs. Our study reveals an increased count and ion abundance of peptides and decreased peptide length from mother's milk to the infant stomach, confirming that additional break-down of the milk proteins occurred in both preterm and term infants' stomachs. Protein digestion occurred at a higher level in the gastric contents of term infants than in gastric contents of preterm infants. An amino acid cleavage site-based enzyme analysis suggested that the observed higher proteolysis in the term infants was due to higher pepsin/cathepsin D activity in the stomach. Additionally, there was a higher quantity of antimicrobial peptides in term infant gastric contents than in those of preterm infants, which could indicate that preterm infants benefit less from bioactive peptides in the gut.
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Affiliation(s)
- Søren D. Nielsen
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA; (S.D.N.); (R.L.B.)
- Department of Food Science, Faculty of Technical Sciences, Aarhus University, 8200 Aarhus, Denmark
| | - Robert L. Beverly
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA; (S.D.N.); (R.L.B.)
| | - Mark A. Underwood
- Department of Pediatrics, University of California, Sacramento, CA 95817, USA;
| | - David C. Dallas
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR 97331, USA; (S.D.N.); (R.L.B.)
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Henderickx JGE, Zwittink RD, van Lingen RA, Knol J, Belzer C. The Preterm Gut Microbiota: An Inconspicuous Challenge in Nutritional Neonatal Care. Front Cell Infect Microbiol 2019; 9:85. [PMID: 31001489 PMCID: PMC6454191 DOI: 10.3389/fcimb.2019.00085] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/12/2019] [Indexed: 12/16/2022] Open
Abstract
The nutritional requirements of preterm infants are unique and challenging to meet in neonatal care, yet crucial for their growth, development and health. Normally, the gut microbiota has distinct metabolic capacities, making their role in metabolism of dietary components indispensable. In preterm infants, variation in microbiota composition is introduced while facing a unique set of environmental conditions. However, the effect of such variation on the microbiota's metabolic capacity and on the preterm infant's growth and development remains unresolved. In this review, we will provide a holistic overview on the development of the preterm gut microbiota and the unique environmental conditions contributing to this, in addition to maturation of the gastrointestinal tract and immune system in preterm infants. The role of prematurity, as well as the role of human milk, in the developmental processes is emphasized. Current research stresses the early life gut microbiota as cornerstone for simultaneous development of the gastrointestinal tract and immune system. Besides that, literature provides clues that prematurity affects growth and development. As such, this review is concluded with our hypothesis that prematurity of the gut microbiota may be an inconspicuous clinical challenge in achieving optimal feeding besides traditional challenges, such as preterm breast milk composition, high nutritional requirements and immaturity of the gastrointestinal tract and immune system. A better understanding of the metabolic capacity of the gut microbiota and its impact on gut and immune maturation in preterm infants could complement current feeding regimens in future neonatal care and thereby facilitate growth, development and health in preterm infants.
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Affiliation(s)
- Jannie G E Henderickx
- Laboratory of Microbiology, Wageningen University and Research, Wageningen, Netherlands
| | - Romy D Zwittink
- Department of Medical Microbiology, Leiden University Medical Center, Leiden, Netherlands
| | - Richard A van Lingen
- Department of Neonatology, Isala Women and Children's Hospital, Zwolle, Netherlands
| | - Jan Knol
- Laboratory of Microbiology, Wageningen University and Research, Wageningen, Netherlands.,Danone Nutricia Research, Utrecht, Netherlands
| | - Clara Belzer
- Laboratory of Microbiology, Wageningen University and Research, Wageningen, Netherlands
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Beverly RL, Underwood MA, Dallas DC. Peptidomics Analysis of Milk Protein-Derived Peptides Released over Time in the Preterm Infant Stomach. J Proteome Res 2019; 18:912-922. [PMID: 30638015 DOI: 10.1021/acs.jproteome.8b00604] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Over the course of milk digestion, native milk proteases and infant digestive proteases fragment intact proteins into peptides with potential bioactivity. This study investigated the release of peptides over 3 h of gastric digestion in 14 preterm infant sample sets. The peptide content was extracted and analyzed from milk and gastric samples via Orbitrap tandem mass spectrometry. The relative ion intensity (abundance) and count of peptides in each sample were compared over time and between infants fed milk fortified with bovine milk fortifier and infants fed unfortified milk. Bioactivity of the identified peptides was predicted by sequence homology to known bioactive milk peptides. Both total and bioactive peptide abundance and count continuously increased over 3 h of gastric digestion. After accounting for infant weight, length, and postconceptual age, fortification of milk limited the release of peptides from human milk proteins. Peptides that survived further gastric digestion after their initial release were structurally more similar to bioactive peptides than nonsurviving peptides. This work is the first to provide a comprehensive profile of milk peptides released during gastric digestion over time, which is an essential step in determining which peptides are most likely to be biologically relevant in the infant. Data are available via ProteomeXchange with identifier PXD012192.
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Affiliation(s)
- Robert L Beverly
- Nutrition Program, School of Biological and Population Health Sciences, College of Public Health and Human Sciences , Oregon State University , Corvallis , Oregon 97331 , United States
| | - Mark A Underwood
- Department of Pediatrics , University of California, Davis , Sacramento , California 95817 , 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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Gianni ML, Roggero P, Mosca F. Human milk protein vs. formula protein and their use in preterm infants. Curr Opin Clin Nutr Metab Care 2019; 22:76-81. [PMID: 30407223 DOI: 10.1097/mco.0000000000000528] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
PURPOSE OF REVIEW We review the current available evidence on the metabolic fate of human milk proteins and their potential clinical implications for growth and body composition development vs. those of formula proteins in preterm infants. RECENT FINDINGS The decreased content of human milk protein in preterm mothers throughout lactation might contribute to the reduced growth reported in exclusively human milk-fed infants compared with that of formula-fed infants. Recent studies have demonstrated that preterm infants are capable of degrading human milk proteins regardless of their degree of prematurity or postnatal age, with limited contribution from milk proteases to protein digestion. The nitrogen balance of fortified human milk-fed preterm infants is higher than that of formula-fed preterm infants. Moreover, the growth of human milk-fed preterm infants appears to be accompanied by fat-free mass deposition. SUMMARY Provided that adequate protein and energy intakes are delivered, human milk enhances protein use rather than oxidation as well as promotes tissue growth, leading to preferential fat-free mass deposition and contributing to the recovery of the body composition in preterm infants. Human milk feeding should be supported and promoted for all preterm mother-infant pairs.
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Affiliation(s)
- Maria L Gianni
- Neonatal Intensive Care Unit, Fondazione I.R.C.C.S. Ca Granda Ospedale Maggiore Policlinico
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Paola Roggero
- Neonatal Intensive Care Unit, Fondazione I.R.C.C.S. Ca Granda Ospedale Maggiore Policlinico
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
| | - Fabio Mosca
- Neonatal Intensive Care Unit, Fondazione I.R.C.C.S. Ca Granda Ospedale Maggiore Policlinico
- Department of Clinical Sciences and Community Health, University of Milan, Milan, Italy
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