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Zhang W, Zhu Y, Wang H, Huang Z, Liu Y, Xu W, Mu W. Highly efficient biosynthesis of 3'-sialyllactose in engineered Escherichia coli. Int J Biol Macromol 2024; 269:132081. [PMID: 38705330 DOI: 10.1016/j.ijbiomac.2024.132081] [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: 11/16/2023] [Revised: 04/09/2024] [Accepted: 05/02/2024] [Indexed: 05/07/2024]
Abstract
3'-Sialyllactose (3'-SL), one of the abundant and important sialylated human milk oligosaccharides, is an emerging food ingredient used in infant formula milk. We previously developed an efficient route for 3'-SL biosynthesis in metabolically engineered Escherichia coli BL21(DE3). Here, several promising α2,3-sialyltransferases were re-evaluated from the byproduct synthesis perspective. The α2,3-sialyltransferase from Neisseria meningitidis MC58 (NST) with great potential and the least byproducts was selected for subsequent molecular modification. Computer-assisted mutation sites combined with a semi-rational modification were designed and performed. A combination of two mutation sites (P120H/N113D) of NST was finally confirmed as the best one, which significantly improved 3'-SL biosynthesis, with extracellular titers of 24.5 g/L at 5-L fed-batch cultivations. When NST-P120H/N113D was additionally integrated into the genome of host EZAK (E. coli BL21(DE3)ΔlacZΔnanAΔnanT), the final strain generated 32.1 g/L of extracellular 3'-SL in a 5-L fed-batch fermentation. Overall, we underscored the existence of by-products and improved 3'-SL production by engineering N. meningitidis α2,3-sialyltransferase.
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Affiliation(s)
- Wenbo Zhang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yingying Zhu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Hao Wang
- Bloomage Biotechnology Corp., Ltd., Jinan, Shandong 250010, People's Republic of China
| | - Zhaolin Huang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Yuanlin Liu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Wei Xu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu 214122, People's Republic of China.
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2
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Demirturk M, Cinar MS, Avci FY. The immune interactions of gut glycans and microbiota in health and disease. Mol Microbiol 2024. [PMID: 38703041 DOI: 10.1111/mmi.15267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 05/06/2024]
Abstract
The human digestive system harbors a vast diversity of commensal bacteria and maintains a symbiotic relationship with them. However, imbalances in the gut microbiota accompany various diseases, such as inflammatory bowel diseases (IBDs) and colorectal cancers (CRCs), which significantly impact the well-being of populations globally. Glycosylation of the mucus layer is a crucial factor that plays a critical role in maintaining the homeostatic environment in the gut. This review delves into how the gut microbiota, immune cells, and gut mucus layer work together to establish a balanced gut environment. Specifically, the role of glycosylation in regulating immune cell responses and mucus metabolism in this process is examined.
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Affiliation(s)
- Mahmut Demirturk
- Department of Biochemistry, Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Mukaddes Sena Cinar
- Department of Biochemistry, Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Fikri Y Avci
- Department of Biochemistry, Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia, USA
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3
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Fresno AH, Alencar ALF, Liu G, Wridt MW, Andersen FB, Pedersen HS, Martin HL, Nielsen SS, Aabo S, Olsen JE, Jensen AN. Effect of feeding dairy calves with milk fermented with selected probiotic strains on occurrence of diarrhoea, carriage of pathogenic and zoonotic microorganisms and growth performance. Vet Microbiol 2023; 286:109885. [PMID: 37812833 DOI: 10.1016/j.vetmic.2023.109885] [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: 08/02/2023] [Accepted: 10/01/2023] [Indexed: 10/11/2023]
Abstract
Calf-diarrhoea is a major health problem in dairy calves and a primary reason for use of antimicrobials. We aimed to investigate the effect of feeding milk fermented with a combination of four probiotic bacterial strains to young-calves on; occurrence of diarrhoea and associated-pathogens (bacteria, virus and parasites), shedding of Salmonella Dublin and Campylobacter, occurrence of virulence genes linked to Clostridium perfringens, Enterotoxigenic Escherichia coli and shiga-toxin producing E. coli (STEC), as well as growth performance. For this, 143 new-born calves from three Danish dairy-farms were allocated into Treatment- (fed the fermented milk for the first 8-weeks-of-life) and Control-groups (fed regular farm-milk). Diarrhoea was observed in 18.6 % (Farm 1), 22.4 % (Farm 2) and 15.7 % (Farm 3) of the total registrations mainly within the first 3-weeks-of-life. C. perfringens was the most frequently detected pathogen. The treatment did not affect the occurrence of virulence genes linked to STEC and C. perfringens and, overall, their detection levels were very low/undetected. The statistical model applied found no significant effect of the treatment on prevalence of early-diarrhoea (≤ 3 weeks), late-diarrhoea (>3 weeks), occurrence of C. perfringens and Cryptosporidium parvum or levels of Campylobacter spp. Limited detection of the other pathogens and associated virulence-genes under study, did not allow for assessment of the impact of the treatment on their occurrence. Notably, the feeding-approach showed a significant detrimental effect on daily-weight-gain. The inefficacy of the treatment may be associated with the complexity of influencing factors under field conditions including management practices.
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Affiliation(s)
- Ana Herrero Fresno
- National Food Institute, Technical University of Denmark, Kemitorvet, 2800 Kgs Lyngby, Denmark
| | - Anna Luiza Farias Alencar
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg C, Denmark
| | - Gang Liu
- College of Veterinary Medicine, Qingdao Agricultural University, Qinddao 266109, China
| | - Mathilde Weinreich Wridt
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg C, Denmark
| | | | | | | | - Søren Saxmose Nielsen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg C, Denmark
| | - Søren Aabo
- National Food Institute, Technical University of Denmark, Kemitorvet, 2800 Kgs Lyngby, Denmark
| | - John Elmerdahl Olsen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Stigbøjlen 4, 1870 Frederiksberg C, Denmark
| | - Annette Nygaard Jensen
- National Food Institute, Technical University of Denmark, Kemitorvet, 2800 Kgs Lyngby, Denmark.
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4
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Anti-infective properties of the protective culture Hafnia alvei B16 in food and intestinal models against multi-drug resistant Salmonella. Food Microbiol 2023; 110:104159. [DOI: 10.1016/j.fm.2022.104159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/29/2022] [Accepted: 10/06/2022] [Indexed: 11/05/2022]
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5
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Linehan K, Ross RP, Stanton C. Bovine Colostrum for Veterinary and Human Health Applications: A Critical Review. Annu Rev Food Sci Technol 2023; 14:387-410. [PMID: 36972163 DOI: 10.1146/annurev-food-060721-014650] [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: 03/29/2023]
Abstract
Bovine colostrum harbors a diverse array of bioactive components suitable for the development of functional foods, nutraceuticals, and pharmaceuticals with veterinary and human health applications. Bovine colostrum has a strong safety profile with applications across all age groups for health promotion and the amelioration of a variety of disease states. Increased worldwide milk production and novel processing technologies have resulted in substantial growth of the market for colostrum-based products. This review provides a synopsis of the bioactive components in bovine colostrum, the processing techniques used to produce high-value colostrum-based products, and recent studies utilizing bovine colostrum for veterinary and human health.
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Affiliation(s)
- Kevin Linehan
- Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland;
- APC Microbiome Ireland, Biosciences Institute, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
| | - R Paul Ross
- APC Microbiome Ireland, Biosciences Institute, University College Cork, Cork, Ireland
- School of Microbiology, University College Cork, Cork, Ireland
| | - Catherine Stanton
- Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland;
- APC Microbiome Ireland, Biosciences Institute, University College Cork, Cork, Ireland
- VistaMilk Research Centre, Teagasc Moorepark, County Cork, Ireland
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6
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Cella MA, Coulson T, MacEachern S, Badr S, Ahmadi A, Tabatabaei MS, Labbe A, Griffiths MW. Probiotic disruption of quorum sensing reduces virulence and increases cefoxitin sensitivity in methicillin-resistant Staphylococcus aureus. Sci Rep 2023; 13:4373. [PMID: 36928453 PMCID: PMC10020441 DOI: 10.1038/s41598-023-31474-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 03/13/2023] [Indexed: 03/18/2023] Open
Abstract
Therapies which target quorum sensing (QS) systems that regulate virulence in methicillin-resistant Staphylococcus aureus (MRSA) are a promising alternative to antibiotics. QS systems play a crucial in the regulation of MRSA antibiotic resistance, exotoxin production, antioxidant protection and immune cell evasion, and are therefore attractive therapeutic targets to reduce the virulence of a pathogen. In the present work the the effects of bioactive peptides isolated from two strains of lactic acid bacteria were tested against antibiotic resistance, carotenoid production, resistance to oxidative killing and biofilm structure in two clinical MRSA isolates. The results obtained from fractional-inhibitory concentration assays with bulk and semi-purified bioactive molecules showed a significant synergistic effect increasing cefoxitin mediated killing of MRSA. This was coupled to a six-fold decrease of the major membrane pigment staphyloxanthin, and a 99% increase in susceptibility to oxidative stress mediated killing. Real-time quantitative PCR analysis of the QS-genes agrA and luxS, showed differential expression between MRSA strains, and a significant downregulation of the hemolysin gene hla. Light microscopy and scanning electron microscopy revealed alteration in biofilm formation and clustering behavior. These results demonstrate that bioactive metabolites may be effectively applied in tandem with beta-lactam antibiotics to sensitize MRSA to cefoxitin. Moreover, these results shown that several key QS-controlled virulence mechanisms are diminished by probiotic metabolites.
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Affiliation(s)
- Monica Angela Cella
- Department of Mechanical Engineering, École de Technologie Supérieure (ÉTS), Montreal, QC, H3C 1K3, Canada
| | | | | | - Sara Badr
- Department of Mechanical Engineering, École de Technologie Supérieure (ÉTS), Montreal, QC, H3C 1K3, Canada
| | - Ali Ahmadi
- Department of Mechanical Engineering, École de Technologie Supérieure (ÉTS), Montreal, QC, H3C 1K3, Canada
| | | | - Alain Labbe
- MicroSintesis Inc., Victoria, PE, COA 2G0, Canada.
| | - Mansel William Griffiths
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON, N1G 2W1, Canada
- Food Science Department, University of Guelph, Guelph, ON, N1G 2W1, Canada
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7
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Wei X, Yu L, Zhang C, Ni Y, Zhang H, Zhai Q, Tian F. Genetic-Phenotype Analysis of Bifidobacterium bifidum and Its Glycoside Hydrolase Gene Distribution at Different Age Groups. Foods 2023; 12:foods12050922. [PMID: 36900439 PMCID: PMC10000437 DOI: 10.3390/foods12050922] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 02/18/2023] [Accepted: 02/20/2023] [Indexed: 02/24/2023] Open
Abstract
Human gut microbiota interfere with host development and aging. Bifidobacterium is a microbial genus found in the human digestive tract that has probiotic activities such as improving constipation and enhancing immunity. The species and numbers present change with age, but there has been limited research on probiotic gut microbiota at specific ages. This study analyzed the distribution of 610 bifidobacteria in subjects in several age groups (0-17, 18-65, and 66-108 y) using 486 fecal samples and determined the distribution of glycoside hydrolases based on genetic analysis of strains representing 85% of the Bifidobacterium species abundance in each age group. 6'-Sialyllactose is a major component of acidic breast milk oligosaccharides, which can promote human neurogenesis and bifidobacteria growth. Using genotypic and phenotypic association analysis, we investigated the utilization of 6'-sialyllactose by six B. bifidum strains isolated from subjects 0-17 and 18-65 y. A comparative genomic analysis of the six B. bifidum strains revealed differences in genomic features across age groups. Finally, the safety of these strains was evaluated by antibiotic gene and drug resistance phenotype analysis. Our results reveal that the distribution of glycoside hydrolase genes in B. bifidum varies with age, thus affecting the phenotypic results. This provides important insights for the design and application of probiotic products for different ages.
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Affiliation(s)
- Xiaojing Wei
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Leilei Yu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
- Correspondence: ; Tel./Fax: +86-510-85912155
| | - Chuan Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Yongqing Ni
- School of Food Science and Technology, Shihezi University, Shihezi 832000, China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
| | - Qixiao Zhai
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
| | - Fengwei Tian
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
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8
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Zhu Y, Zhang J, Zhang W, Mu W. Recent progress on health effects and biosynthesis of two key sialylated human milk oligosaccharides, 3'-sialyllactose and 6'-sialyllactose. Biotechnol Adv 2023; 62:108058. [PMID: 36372185 DOI: 10.1016/j.biotechadv.2022.108058] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 10/25/2022] [Accepted: 11/06/2022] [Indexed: 11/13/2022]
Abstract
Human milk oligosaccharides (HMOs), the third major solid component in breast milk, are recognized as the first prebiotics for health benefits in infants. Sialylated HMOs are an important type of HMOs, accounting for approximately 13% of total HMOs. 3'-Sialyllactose (3'-SL) and 6'-sialyllactose (6'-SL) are two simplest sialylated HMOs. Both SLs display promising prebiotic effects, especially in promoting the proliferation of bifidobacteria and shaping the gut microbiota. SLs exhibit several health effects, including antiadhesive antimicrobial ability, antiviral activity, prevention of necrotizing enterocolitis, immunomodulatory activity, regulation of intestinal epithelial cell response, promotion of brain development, and cognition improvement. Both SLs have been approved as "Generally Recognized as Safe" by the American Food and Drug Administration and are commercially added to infant formula. The biosynthesis of SLs using enzymatic or microbial approaches has been widely studied. The enzymatic synthesis of SLs can be realized by two types of enzymes, sialidases with trans-sialidase activity and sialyltransferases. Microbial synthesis can be achieved by the multiple recombinant bacteria in one-pot reaction, which express the enzymes involved in SL synthesis pathways separately or in combination, or by metabolically engineered strains in a fermentation process. In this article, the physiological properties of 3'-SL and 6'-SL are summarized in detail and the biosynthesis of these SLs via enzymatic and microbial synthesis is comprehensively reviewed.
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Affiliation(s)
- Yingying Zhu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Jiameng Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China.
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9
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Wang J, Chen MS, Wang RS, Hu JQ, Liu S, Wang YYF, Xing XL, Zhang BW, Liu JM, Wang S. Current Advances in Structure-Function Relationships and Dose-Dependent Effects of Human Milk Oligosaccharides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:6328-6353. [PMID: 35593935 DOI: 10.1021/acs.jafc.2c01365] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
HMOs (human milk oligosaccharides) are the third most important nutrient in breast milk. As complex glycans, HMOs play an important role in regulating neonatal intestinal immunity, resisting viral and bacterial infections, displaying anti-inflammatory characteristics, and promoting brain development. Although there have been some previous reports of HMOs, a detailed literature review summarizing the structure-activity relationships and dose-dependent effects of HMOs is lacking. Hence, after introducing the structures and synthetic pathways of HMOs, this review summarizes and categorizes identified structure-function relationships of HMOs. Differential mechanisms of different structural HMOs utilization by microorganisms are summarized. This review also emphasizes the recent advances in the interactions between different health benefits and the variance of dosage effect based on in vitro cell tests, animal experiments, and human intervention studies. The potential relationships between the chemical structure, the dosage selection, and the physiological properties of HMOs as functional foods are vital for further understanding of HMOs and their future applications.
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Affiliation(s)
- Jin Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Meng-Shan Chen
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Rui-Shan Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Jia-Qiang Hu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Shuang Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Yuan-Yi-Fei Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Xiao-Long Xing
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Bo-Wei Zhang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Jing-Min Liu
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
| | - Shuo Wang
- Tianjin Key Laboratory of Food Science and Health, School of Medicine, Nankai University, No. 94 Weijin Road, Tianjin 300071, China
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10
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Liu G, Kragh ML, Aabo S, Jensen AN, Olsen JE. Inhibition of Virulence Gene Expression in Salmonella Dublin, Escherichia coli F5 and Clostridium perfringens Associated With Neonatal Calf Diarrhea by Factors Produced by Lactic Acid Bacteria During Fermentation of Cow Milk. Front Microbiol 2022; 13:828013. [PMID: 35633687 PMCID: PMC9134014 DOI: 10.3389/fmicb.2022.828013] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Accepted: 03/31/2022] [Indexed: 11/24/2022] Open
Abstract
Diarrhea is a major health problem in neonatal and young calves worldwide. It can be caused by a variety of infectious agents, including the bacteria Salmonella enterica serovar Dublin (S. Dublin), enterotoxigenic Escherichia coli (ETEC), and Clostridium perfringens. Preventive alternatives to antibiotic treatment should be identified. As a first step toward this, the aim of the current study was to examine whether cell-free supernatants from cow milk fermented by lactic acid bacteria affects virulence-gene expression in strains of S. Dublin, ETEC E. coli F5 and C. perfringens. pH-neutralized, cell-free, spent medium of milk (nCFSM) fermented by 61 different lactic acid bacteria (LAB) and non-LAB starter cultures belonging to 17 genera was assayed for their effect on expression of important virulence factors (S. Dublin hilA, ssrB, ssaG, flhD, prgI, fliC; ETEC E. coli F5 fanC, estA, fim41a; C. perfringens cpa), when the bacteria were grown in the nCFSM. Screening was done using either a promoter-reporter expression system or RT-qPCR. nCFSM from Bifidobacterium longum BL-15955 and Limosilactobacillus reuteri LR-33016 downregulated the expression of fanC, fim41a and estA genes in the four tested ETEC E. coli F5 strains without affecting their growth, while mainly B. longum BL-15955 downregulated expression of cpa in the four tested strains of C. perfringens. nCFSM from the mixed cultures; NU-TRISH® BY-Mild (Lactobacillus delbrueckii subsp. bulgaricus, Streptococcus thermophilus and Bifidobacterium BL-15954) and COMBO4 (Lactobacillus delbrueckii subsp. bulgaricus and Streptococcus thermophilus), as well as Lactobacillus helveticus CNRZ32 downregulated the tested virulence genes in the three tested strains of S. Dublin. To enable possible downregulation of the expression of virulence genes in all three target bacteria simultaneously, nCFSM was prepared from NU-TRISH® By-Mild in combination with B. longum BL-15955 (i.e. a four-strain combination). The nCFSM from this combination downregulated the virulence genes expression in all the three species. In the future, NU-TRISH® By-Mild and B. longum BL-15955 in combination could potentially be used for prevention of neonatal calf diarrhea caused by S. Dublin, E. coli F5, and C. perfringens, reducing the need for antimicrobial treatment, however, field studies are needed to prove that.
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Affiliation(s)
- Gang Liu
- College of Veterinary Medicine, Qingdao Agricultural University, Qingdao, China
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Martin Laage Kragh
- National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | - Søren Aabo
- National Food Institute, Technical University of Denmark, Lyngby, Denmark
| | | | - John Elmerdahl Olsen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
- *Correspondence: John Elmerdahl Olsen
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11
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Ali E, LaPointe G. Modulation of Virulence Gene Expression in Salmonella enterica subsp. enterica typhimurium by Synthetic Milk-Derived Peptides. Probiotics Antimicrob Proteins 2022; 14:690-698. [PMID: 35380388 DOI: 10.1007/s12602-022-09936-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2022] [Indexed: 11/28/2022]
Abstract
The hydrolysis of milk proteins produces valuable bioactive peptides, some of which show antivirulence activity. In this study, five synthetic milk-derived peptides (β-LG f(9-18), β-CN f(5-15), β-CN f(17-27), β-CN f(94-106), and β-CN f(129-137)) were shown to decrease the expression of virulence genes in Salmonella enterica subsp. enterica typhimurium when tested at four concentrations (0.02, 0.05, 0.1, and 0.2 mg/ml). A mixture of these synthetic peptides at concentrations of 0.02 and 0.2 mg/ml each significantly downregulated the expression of both hilA and ssrB virulence genes in Salmonella typhimurium after a 3-h incubation. Individually, β-CN f(17-27) at 0.02 mg/ml caused a significant decrease in both hilA and ssrB gene expressions. These results suggest a synergistic interaction between bioactive peptides. Depending on dose and amino acid sequence, these five peptides were able to affect the expression of some virulence genes in Salmonella typhimurium.
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Affiliation(s)
- Eman Ali
- Food Hygiene Department, Faculty of Veterinary Medicine, Damanhour University, Damanhour El-Beheira, 22511, Egypt
| | - Gisèle LaPointe
- Department of Food Science, Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON, N1G 2W1, Canada.
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12
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Dharmaratne P, Rahman N, Leung A, Ip M. Is there a role of faecal microbiota transplantation in reducing antibiotic resistance burden in gut? A systematic review and Meta-analysis. Ann Med 2021; 53:662-681. [PMID: 34170204 PMCID: PMC8238059 DOI: 10.1080/07853890.2021.1927170] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 05/03/2021] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVES The aim of current systematic review and meta-analysis is to provide insight into the therapeutic efficacy of fecal microbiota transplantation (FMT) for the decolonization of antimicrobial-resistant (AMR) bacteria from the gut. METHODS The protocol for this Systematic Review was prospectively registered with PROSPERO (CRD42020203634). Four databases (EMBASE, MEDLINE, SCOPUS, and WEB of SCIENCE) were consulted up until September 2020. A total of fourteen studies [in vivo (n = 2), case reports (n = 7), case series without control arm (n = 3), randomized clinical trials (RCT, n = 2)], were reviewed. Data were synthesized narratively for the case reports, along with a proportion meta-analysis for the case series studies (n = 102 subjects) without a control arm followed by another meta-analysis for case series studies with a defined control arm (n = 111 subjects) for their primary outcomes. RESULTS Overall, seven non-duplicate case reports (n = 9 participants) were narratively reviewed and found to have broad AMR remission events at the 1-month time point. Proportion meta-analysis of case series studies showed an overall 0.58 (95% CI: 0.42-0.74) AMR remission. Additionally, a significant difference in AMR remission was observed in FMT vs treatment naïve (RR = 0.44; 95% CI: 0.20-0.99) and moderate heterogeneity (I2=65%). A subgroup analysis of RCTs (n = 2) revealed FMT with further benefits of AMR remission with low statistical heterogeneity (RR = 0.37; 95% CI: 0.18-0.79; I2 =23%). CONCLUSION More rigorous RCTs with larger sample size and standardized protocols on FMTs for gut decolonization of AMR organisms are warranted.KEY MESSAGEExisting studies in this subject are limited and of low quality with moderate heterogeneity, and do not allow definitive conclusions to be drawn.More rigorous RCTs with larger sample size and standardized protocols on FMTs for gut decolonization of AMR organisms are warranted.
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Affiliation(s)
- Priyanga Dharmaratne
- Faculty of Medicine, Department of Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Sha Tin, China
| | - Nannur Rahman
- Faculty of Medicine, Department of Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Sha Tin, China
| | - Anthony Leung
- Faculty of Medicine, Department of Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Sha Tin, China
| | - Margaret Ip
- Faculty of Medicine, Department of Microbiology, The Chinese University of Hong Kong, Prince of Wales Hospital, Sha Tin, China
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
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13
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Hill DR, Chow JM, Buck RH. Multifunctional Benefits of Prevalent HMOs: Implications for Infant Health. Nutrients 2021; 13:3364. [PMID: 34684364 PMCID: PMC8539508 DOI: 10.3390/nu13103364] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 09/20/2021] [Accepted: 09/22/2021] [Indexed: 12/13/2022] Open
Abstract
Breastfeeding is the best source of nutrition during infancy and is associated with a broad range of health benefits. However, there remains a significant and persistent need for innovations in infant formula that will allow infants to access a wider spectrum of benefits available to breastfed infants. The addition of human milk oligosaccharides (HMOs) to infant formulas represents the most significant innovation in infant nutrition in recent years. Although not a direct source of calories in milk, HMOs serve as potent prebiotics, versatile anti-infective agents, and key support for neurocognitive development. Continuing improvements in food science will facilitate production of a wide range of HMO structures in the years to come. In this review, we evaluate the relationship between HMO structure and functional benefits. We propose that infant formula fortification strategies should aim to recapitulate a broad range of benefits to support digestive health, immunity, and cognitive development associated with HMOs in breastmilk. We conclude that acetylated, fucosylated, and sialylated HMOs likely confer important health benefits through multiple complementary mechanisms of action.
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Affiliation(s)
| | | | - Rachael H. Buck
- Abbott Nutrition, 3300 Stelzer Road, Columbus, OH 43219, USA; (D.R.H.); (J.M.C.)
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14
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Bar-Yoseph H, Carasso S, Shklar S, Korytny A, Even Dar R, Daoud H, Nassar R, Maharshak N, Hussein K, Geffen Y, Chowers Y, Geva-Zatorsky N, Paul M. Oral Capsulized Fecal Microbiota Transplantation for Eradication of Carbapenemase-producing Enterobacteriaceae Colonization With a Metagenomic Perspective. Clin Infect Dis 2021; 73:e166-e175. [PMID: 32511695 DOI: 10.1093/cid/ciaa737] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 06/04/2020] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Carbapenemase-producing Enterobacteriaceae (CPE) infections lead to considerable morbidity and mortality. We assessed the potential of fecal microbiota transplantation (FMT) to eradicate CPE carriage and aimed to explain failure or success through microbiome analyses. METHODS In this prospective cohort study, all consenting eligible CPE carriers received oral capsulized FMT for 2 days. Primary outcome was CPE eradication at 1 month, defined by 3 consecutive negative rectal swabs, the last also negative for carbapenemase gene by polymerase chain reaction. Comprehensive metagenomics analysis of the intestinal microbiome of donors and recipients before and after FMT was performed. RESULTS Fifteen CPE carriers received FMT, 13 of whom completed 2 days of treatment. CPE eradication at 1 month was successful in 9/15 and 9/13, respectively. Bacterial communities showed significant changes in both beta and alpha diversity metrics among participants who achieved CPE eradication that were not observed among failures. Post-FMT samples' beta-diversity clustered according to the treatment outcome, both in taxonomy and in function. We observed a significant decrease in beta diversity in participants who received post-FMT antibiotics. Enterobacteriaceae abundance decreased in post-FMT samples of the responders but increased among failures. Functionally, a clear demarcation between responders (who were similar to the donors) and failures was shown, driven by antimicrobial resistance genes. CONCLUSIONS Our study provides the biological explanation for the effect of FMT against CPE carriage. Decolonization of CPE by FMT is likely mediated by compositional and functional shifts in the microbiome. Thus, FMT might be an efficient strategy for sustained CPE eradication. CLINICAL TRIALS REGISTRATION NCT03167398.
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Affiliation(s)
- Haggai Bar-Yoseph
- Department of Gastroenterology, Rambam Health Care Campus, Haifa, Israel.,Rappaport Faculty of Medicine, Technion Israel Institute of Technology, Haifa, Israel
| | - Shaqed Carasso
- Department of Cell Biology and Cancer Science, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Technion Integrated Cancer Center, Haifa, Israel
| | - Shlomit Shklar
- Division of Infectious Disease, Rambam Health Care Campus, Haifa, Israel
| | - Alexander Korytny
- Department of Gastroenterology, Rambam Health Care Campus, Haifa, Israel
| | - Razi Even Dar
- Department of Internal Medicine H, Rambam Health Care Campus, Haifa, Israel
| | - Haneen Daoud
- Department of Internal Medicine H, Rambam Health Care Campus, Haifa, Israel
| | - Roni Nassar
- Department of Gastroenterology, Rambam Health Care Campus, Haifa, Israel
| | - Nitsan Maharshak
- Bacteriotherapy Clinic, Department of Gastroenterology and Liver Diseases, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel (affiliated with the Sackler Faculty of Medicine, Tel Aviv University)
| | - Khetam Hussein
- Division of Infectious Disease, Rambam Health Care Campus, Haifa, Israel
| | - Yuval Geffen
- Microbiology Laboratory, Rambam Health Care Campus, Haifa, Israel
| | - Yehuda Chowers
- Department of Gastroenterology, Rambam Health Care Campus, Haifa, Israel.,Clinical Research Institute, Rambam Health Care Campus, Haifa, Israel
| | - Naama Geva-Zatorsky
- Department of Cell Biology and Cancer Science, Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Technion Integrated Cancer Center, Haifa, Israel.,Canadian Institute for Advanced Research, MaRS Centre, Toronto, Ontario, Canada
| | - Mical Paul
- Rappaport Faculty of Medicine, Technion Israel Institute of Technology, Haifa, Israel.,Division of Infectious Disease, Rambam Health Care Campus, Haifa, Israel
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15
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Wang BX, Wu CM, Ribbeck K. Home, sweet home: how mucus accommodates our microbiota. FEBS J 2021; 288:1789-1799. [PMID: 32755014 PMCID: PMC8739745 DOI: 10.1111/febs.15504] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 07/17/2020] [Accepted: 07/30/2020] [Indexed: 12/16/2022]
Abstract
As a natural environment for human-microbiota interactions, healthy mucus houses a remarkably stable and diverse microbial community. Maintaining this microbiota is essential to human health, both to support the commensal bacteria that perform a wide array of beneficial functions and to prevent the outgrowth of pathogens. However, how the host selects and maintains a specialized microbiota remains largely unknown. In this viewpoint, we propose several strategies by which mucus may regulate the composition and function of the human microbiota and discuss how compromised mucus barriers in disease can give rise to microbial dysbiosis.
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Affiliation(s)
- Benjamin X Wang
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
- Microbiology Graduate Program, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Chloe M Wu
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
| | - Katharina Ribbeck
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
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16
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Barbosa PDPM, Ruviaro AR, Martins IM, Macedo JA, LaPointe G, Macedo GA. Enzyme-assisted extraction of flavanones from citrus pomace: Obtention of natural compounds with anti-virulence and anti-adhesive effect against Salmonella enterica subsp. enterica serovar Typhimurium. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107525] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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17
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Playford RJ, Weiser MJ. Bovine Colostrum: Its Constituents and Uses. Nutrients 2021; 13:265. [PMID: 33477653 PMCID: PMC7831509 DOI: 10.3390/nu13010265] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Revised: 01/13/2021] [Accepted: 01/14/2021] [Indexed: 02/07/2023] Open
Abstract
Colostrum is the milk produced during the first few days after birth and contains high levels of immunoglobulins, antimicrobial peptides, and growth factors. Colostrum is important for supporting the growth, development, and immunologic defence of neonates. Colostrum is naturally packaged in a combination that helps prevent its destruction and maintain bioactivity until it reaches more distal gut regions and enables synergistic responses between protective and reparative agents present within it. Bovine colostrum been used for hundreds of years as a traditional or complementary therapy for a wide variety of ailments and in veterinary practice. Partly due to concerns about the side effects of standard Western medicines, there is interest in the use of natural-based products of which colostrum is a prime example. Numerous preclinical and clinical studies have demonstrated therapeutic benefits of bovine colostrum for a wide range of indications, including maintenance of wellbeing, treatment of medical conditions and for animal husbandry. Articles within this Special Issue of Nutrients cover the effects and use bovine colostrum and in this introductory article, we describe the main constituents, quality control and an overview of the use of bovine colostrum in health and disease.
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Affiliation(s)
- Raymond John Playford
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London E1 2AD, UK
- Department of R&D, PanTheryx Inc., Boulder, CO 80301, USA;
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18
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Bondue P, Lebrun S, Taminiau B, Everaert N, LaPointe G, Hendrick C, Gaillez J, Crèvecoeur S, Daube G, Delcenserie V. Effect of Bifidobacterium crudilactis and 3′-sialyllactose on the toddler microbiota using the SHIME® model. Food Res Int 2020; 138:109755. [DOI: 10.1016/j.foodres.2020.109755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 09/22/2020] [Accepted: 09/25/2020] [Indexed: 12/21/2022]
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19
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Mantziari A, Salminen S, Szajewska H, Malagón-Rojas JN. Postbiotics against Pathogens Commonly Involved in Pediatric Infectious Diseases. Microorganisms 2020; 8:E1510. [PMID: 33008065 PMCID: PMC7601467 DOI: 10.3390/microorganisms8101510] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/22/2020] [Accepted: 09/29/2020] [Indexed: 02/08/2023] Open
Abstract
The Sustainable Development goals for 2020 included reducing all causes associated with infant and perinatal mortality in their priorities. The use of compounds with bioactive properties has been proposed as a therapeutic strategy due to their stimulating effect on the host's immune system. Additionally, biotherapeutic products such as postbiotics, tentatively defined as compounds produced during a fermentation process that support health and well-being, promote intestinal barrier integrity without posing considerable risks to children's health. Although this is a concept in development, there are increasing studies in the field of nutrition, chemistry, and health that aim to understand how postbiotics can help prevent different types of infections in priority populations such as minors under the age of five. The present review aims to describe the main mechanisms of action of postbiotics. In addition, it presents the available current evidence regarding the effects of postbiotics against pathogens commonly involved in pediatric infections. Postbiotics may constitute a safe alternative capable of modulating the cellular response and stimulating the host's humoral response.
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Affiliation(s)
- Anastasia Mantziari
- Functional Foods Forum, Faculty of Medicine, University of Turku, 20520 Turku, Finland;
| | - Seppo Salminen
- Functional Foods Forum, Faculty of Medicine, University of Turku, 20520 Turku, Finland;
| | - Hania Szajewska
- Department of Paediatrics at the Medical University of Warsaw, 02091 Warsaw, Poland;
| | - Jeadran Nevardo Malagón-Rojas
- Facultad de Medicina, Universidad El Bosque, 110121 Bogotá, Colombia;
- Instituto Nacional de Salud de Colombia, 111321 Bogotá, Colombia
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20
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Bondue P, Milani C, Arnould E, Ventura M, Daube G, LaPointe G, Delcenserie V. Bifidobacterium mongoliense genome seems particularly adapted to milk oligosaccharide digestion leading to production of antivirulent metabolites. BMC Microbiol 2020; 20:111. [PMID: 32380943 PMCID: PMC7206731 DOI: 10.1186/s12866-020-01804-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 04/26/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Human milk oligosaccharides (HMO) could promote the growth of bifidobacteria, improving young children's health. In addition, fermentation of carbohydrates by bifidobacteria can result in the production of metabolites presenting an antivirulent activity against intestinal pathogens. Bovine milk oligosaccharides (BMO), structurally similar to HMO, are found at high concentration in cow whey. This is particularly observed for 3'-sialyllactose (3'SL). This study focused on enzymes and transport systems involved in HMO/BMO metabolism contained in B. crudilactis and B. mongoliense genomes, two species from bovine milk origin. The ability of B. mongoliense to grow in media supplemented with whey or 3'SL was assessed. Next, the effects of cell-free spent media (CFSM) were tested against the virulence expression of Escherichia coli O157:H7 and Salmonella enterica serovar Typhimurium. RESULTS Due to the presence of genes encoding β-galactosidases, β-hexosaminidases, α-sialidases and α-fucosidases, B. mongoliense presents a genome more sophisticated and more adapted to the digestion of BMO/HMO than B. crudilactis (which contains only β-galactosidases). In addition, HMO/BMO digestion involves genes encoding oligosaccharide transport systems found in B. mongoliense but not in B. crudilactis. B. mongoliense seemed able to grow on media supplemented with whey or 3'SL as main source of carbon (8.3 ± 1.0 and 6.7 ± 0.3 log cfu/mL, respectively). CFSM obtained from whey resulted in a significant under-expression of ler, fliC, luxS, stx1 and qseA genes (- 2.2, - 5.3, - 2.4, - 2.5 and - 4.8, respectively; P < 0.05) of E. coli O157:H7. CFSM from 3'SL resulted in a significant up-regulation of luxS (2.0; P < 0.05) gene and a down-regulation of fliC (- 5.0; P < 0.05) gene. CFSM obtained from whey resulted in significant up-regulations of sopD and hil genes (2.9 and 3.5, respectively; P < 0.05) of S. Typhimurium, while CFSM obtained from 3'SL fermentation down-regulated hil and sopD genes (- 2.7 and - 4.2, respectively; P < 0.05). CONCLUSION From enzymes and transporters highlighted in the genome of B. mongoliense and its potential ability to metabolise 3'SL and whey, B. mongoliense seems well able to digest HMO/BMO. The exact nature of the metabolites contained in CFSM has to be identified still. These results suggest that BMO associated with B. mongoliense could be an interesting synbiotic formulation to maintain or restore intestinal health of young children.
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Affiliation(s)
- Pauline Bondue
- Department of Food Science, Fundamental and Applied Research for Animal and Health, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Christian Milani
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Emilie Arnould
- Department of Food Science, Fundamental and Applied Research for Animal and Health, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Marco Ventura
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences and Environmental Sustainability, University of Parma, Parma, Italy
| | - Georges Daube
- Department of Food Science, Fundamental and Applied Research for Animal and Health, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Gisèle LaPointe
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, Canada
| | - Véronique Delcenserie
- Department of Food Science, Fundamental and Applied Research for Animal and Health, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.
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21
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Ali E, Nielsen SD, Abd-El Aal S, El-Leboudy A, Saleh E, LaPointe G. Use of Mass Spectrometry to Profile Peptides in Whey Protein Isolate Medium Fermented by Lactobacillus helveticus LH-2 and Lactobacillus acidophilus La-5. Front Nutr 2019; 6:152. [PMID: 31681785 PMCID: PMC6803757 DOI: 10.3389/fnut.2019.00152] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Accepted: 09/06/2019] [Indexed: 11/13/2022] Open
Abstract
Peptides in the 3-kDa ultrafiltrate of fermented whey protein isolate (WPI) medium could be responsible for the antivirulence activity of Lactobacillus helveticus LH-2 and Lactobacillus acidophilus La-5 against Salmonella Typhimurium. Non-fermented and fermented media containing 5.6% WPI were fractionated at a 3 kDa cut-off and the filtrate was analyzed by mass spectrometry. The non-fermented WPI medium contained 109 milk derived peptides, which originated from β-casein (52), αs1-casein (22), αs2-casein (10), κ-casein (8), and β-lactoglobulin (17). Most of these peptides were not found in the fermented media, except for 14 peptides from β-casein and one peptide from αs2-casein. Database searches confirmed that 39 out of the 109 peptides had established physiological functions, including angiotensin-converting-enzyme (ACE) inhibitory, antioxidant, antimicrobial, or immunomodulating activity. A total of 75 peptides were found in the LH-2 cell free spent medium (CFSM): 54 from β-casein, 14 from k-casein, 4 from β-lactoglobulin and 3 from αs2-casein. From these peptides, 19 have previously been associated with several categories of bioactivity. For La-5 CFSM, a total of 15 peptides were sequenced: 8 from β-casein, 5 from αs1-casein, 2 from β-lactoglobulin. Only 5 of these have previously been reported as having bioactivity. Many of the peptides remaining in the fermented medium would contain low-affinity residues for oligopeptide binding proteins and higher resistance to peptidase hydrolysis. These properties of the sequenced peptides could explain their accumulation after fermentation despite the active proteolytic enzymes of LH-2 and La-5 strains. Down-regulated expression of hilA and ssrB genes in S. Typhimurium was observed in the presence of La-5 and LH-2 CFSM. Downregulation was not observed for the Salmonella oppA mutant strain exposed to the same CFSM used to treat the S. Typhimurium DT104 wild-type strain. This result suggests the importance of peptide transport by S. Typhimurium for down regulation of virulence genes in Salmonella.
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Affiliation(s)
- Eman Ali
- Food Hygiene Department, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON, Canada
| | - Søren D. Nielsen
- Department of Food Science, Faculty of Science and Technology, Aarhus University, Aarhus, Denmark
| | - Salah Abd-El Aal
- Food Control Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Ahlam El-Leboudy
- Food Hygiene Department, Faculty of Veterinary Medicine, Alexandria University, Alexandria, Egypt
| | - Ebeed Saleh
- Food Hygiene Department, Faculty of Veterinary Medicine, Damanhour University, Damanhour, Egypt
| | - Gisèle LaPointe
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON, Canada
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22
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Cameron A, McAllister TA. Could probiotics be the panacea alternative to the use of antimicrobials in livestock diets? Benef Microbes 2019; 10:773-799. [PMID: 31965849 DOI: 10.3920/bm2019.0059] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Probiotics are most frequently derived from the natural microbiota of healthy animals. These bacteria and their metabolic products are viewed as nutritional tools for promoting animal health and productivity, disease prevention and therapy, and food safety in an era defined by increasingly widespread antimicrobial resistance in bacterial pathogens. In contemporary livestock production, antimicrobial usage is indispensable for animal welfare, and employed to enhance growth and feed efficiency. Given the importance of antimicrobials in both human and veterinary medicine, their effective replacement with direct-fed microbials or probiotics could help reduce antimicrobial use, perhaps restoring or extending the usefulness of these precious drugs against serious infections. Thus, probiotic research in livestock is rapidly evolving, aspiring to produce local and systemic health benefits on par with antimicrobials. Although many studies have clearly demonstrated the potential of probiotics to positively affect animal health and inhibit pathogens, experimental evidence suggests that probiotics' successes are modest, conditional, strain-dependent, and transient. Here, we explore current understanding, trends, and emerging applications of probiotic research and usage in major livestock species, and highlight successes in animal health and performance.
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Affiliation(s)
- A Cameron
- Faculty of Veterinary Medicine, University of Calgary, Calgary, AB, Canada.,Agriculture and Agri-Food Canada, 5403 1st Ave South, Lethbridge, AB T1J 4P4, Canada
| | - T A McAllister
- Agriculture and Agri-Food Canada, 5403 1st Ave South, Lethbridge, AB T1J 4P4, Canada
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23
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Triantis V, Bode L, van Neerven RJJ. Immunological Effects of Human Milk Oligosaccharides. Front Pediatr 2018; 6:190. [PMID: 30013961 PMCID: PMC6036705 DOI: 10.3389/fped.2018.00190] [Citation(s) in RCA: 179] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 06/08/2018] [Indexed: 12/15/2022] Open
Abstract
Human milk oligosaccharides (HMOs) comprise a group of structurally complex, unconjugated glycans that are highly abundant in human milk. HMOs are minimally digested in the gastrointestinal tract and reach the colon intact, where they shape the microbiota. A small fraction of HMOs is absorbed, reaches the systemic circulation, and is excreted in urine. HMOs can bind to cell surface receptors expressed on epithelial cells and cells of the immune system and thus modulate neonatal immunity in the infant gut, and possibly also sites throughout the body. In addition, they have been shown to act as soluble decoy receptors to block the attachment of various microbial pathogens to cells. This review summarizes the current knowledge of the effects HMOs can have on infections, allergies, auto-immune diseases and inflammation, and will focus on the role of HMOs in altering immune responses through binding to immune-related receptors.
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Affiliation(s)
| | - Lars Bode
- Department of Pediatrics, University of California, San Diego, San Diego, CA, United States
| | - R J Joost van Neerven
- FrieslandCampina, Amersfoort, Netherlands.,Wageningen University and Research, Cell Biology and Immunology, Wageningen, Netherlands
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24
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Nordeste R, Tessema A, Sharma S, Kovač Z, Wang C, Morales R, Griffiths MW. Molecules produced by probiotics prevent enteric colibacillosis in pigs. BMC Vet Res 2017; 13:335. [PMID: 29141637 PMCID: PMC5688758 DOI: 10.1186/s12917-017-1246-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 10/30/2017] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND With the advent of antimicrobial resistance in animal pathogens, novel methods to combat infectious diseases are being sought. Among these, probiotics have been proposed as a means of promoting animal health but problems with their use has been reported. Research has demonstrated that bioactive molecules produced during the growth of certain probiotics interfere with bacterial cell-to-cell communication, which consequently results in an attenuation of virulence in a number of pathogens, including E. coli. The objective of this study was to determine the efficacy of the bioactive molecules, termed proteobiotics, produced by Lactobacillus acidophilus in preventing enterotoxigenic E, coli (ETEC) infection in pigs, which is the etiological agent for enteric colibacillosis, a common disease of nursing and young pigs. RESULTS To achieve this, piglets were fed a preparation of the bioactive at four levels: 0, 0.5×, 1.0× and 2.0× for 7 days prior to challenge with E. coli K88. There were 36 pigs (18 gilts and 18 barrows) per treatment, resulting in 144 piglets in total for the study. Each pen had 6 piglets (3 gilts and 3 barrows). Only piglets with no physical abnormality or conditions were used in the trial and intact male piglets and ridglings were excluded. The bioactive continued to be fed to the pigs post-challenge. Based of fecal and demeanour scores, pigs fed the low and high dose of the proteobiotic were significanlty less likely to show symptoms of illness than pigs fed no bioactive. While not being significant, the weight gain of pigs given the proteobiotics was improved. At day 4 following challenge, almost 50% of piglets that did not receive the proteobiotic were shedding ETEC in their feces, compared with about 15% of animals receiving the supplement. There was also an indication that the proteobiotics reduced colonization of the ileum by E. coli K88 and improved gut health. CONCLUSION This study indicates that the bioactive molecules produced by L. acidophilus reduces incidence of enteric colibacillosis in pigs and their use on farms would help to reduce antibiotic use.
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Affiliation(s)
- Ricardo Nordeste
- MicroSintesis Inc., Duffy Research Centre, NRC Building 28, 550 University Ave, Charlottetown, PE Canada
| | - Akalate Tessema
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON N1G 2W1 Canada
| | - Sapana Sharma
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON N1G 2W1 Canada
| | - Zlatko Kovač
- Department of Veterinary Clinical and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Dyrlægevej 16, 1870, Copenhagen, Frederiksberg C Denmark
| | - Chuan Wang
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON N1G 2W1 Canada
| | - Rocio Morales
- Canadian Research Institute for Food Safety, University of Guelph, Guelph, ON N1G 2W1 Canada
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