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Oh NS, Lee JY, Joung JY, Kim SG, Shin YK. 0554 Improved functionality of fermented milk is mediated by the symbiotic interaction between Cudrania tricuspidata leaf extract and Lactobacillus gasseri strains. J Anim Sci 2016. [DOI: 10.2527/jam2016-0554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Oh NS, Lee JY, Joung JY, Shin YK. 0521 Chemical characteristics and enhanced hepatoprotective activities of Maillard-reaction products derived from milk protein-sugar system. J Anim Sci 2016. [DOI: 10.2527/jam2016-0521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Son SJ, Park MR, Ryu SD, Maburutse BE, Oh NS, Park J, Oh S, Kim Y. Short communication: In vivo screening platform for bacteriocins using Caenorhabditis elegans to control mastitis-causing pathogens. J Dairy Sci 2016; 99:8614-8621. [PMID: 27638256 DOI: 10.3168/jds.2016-11330] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 07/20/2016] [Indexed: 01/03/2023]
Abstract
This study aimed to develop an in vivo screening platform using Caenorhabditis elegans to identify a novel bacteriocin for controlling the mastitis-causing pathogen Staphylococcus aureus strain RF122 in dairy cows. Using Bacillus spp. isolated from traditional Korean foods, we developed a direct in vivo screening platform that uses 96-well plates and fluorescence image analysis. We identified a novel bacteriocin produced by Bacillus licheniformis strain 146 (lichenicin 146) with a high in vivo antimicrobial activity using our liquid C. elegans-Staph. aureus assay. We also determined the characteristics of lichenicin 146 using liquid chromatography-mass spectrometry and confirmed that it shared homologous sequences with bacteriocin family proteins. In addition, RNA-sequencing analysis revealed genes encoding cell surface or membrane proteins (SAB0993c, SAB0150, SAB0994c, and SAB2375c) that are involved in the bactericidal activity of lichenicin 146 against Staph. aureus strain RF122 infection as well as those encoding transcriptional regulators (SAB0844c and SAB0133). Thus, our direct in vivo screening platform facilitates simple, convenient, cost-effective, and reliable screening of potential antimicrobial compounds with applications in the dairy field.
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Affiliation(s)
- S J Son
- Department of Animal Science and Institute of Milk Genomics, Chonbuk National University, Jeonju 561-756, Korea; Agency of National Food Cluster, Gwacheon, 427-806, Korea
| | - M R Park
- Department of Animal Science and Institute of Milk Genomics, Chonbuk National University, Jeonju 561-756, Korea
| | - S D Ryu
- Department of Animal Science and Institute of Milk Genomics, Chonbuk National University, Jeonju 561-756, Korea
| | - B E Maburutse
- Department of Animal Science and Institute of Milk Genomics, Chonbuk National University, Jeonju 561-756, Korea
| | - N S Oh
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, Korea
| | - J Park
- Department of Veterinary Internal Medicine, College of Veterinary Medicine, Chonbuk National University, Iksan 570-752, Korea
| | - S Oh
- Department of Animal Science and Institute of Milk Genomics, Chonbuk National University, Jeonju 561-756, Korea.
| | - Y Kim
- Department of Animal Science and Institute of Milk Genomics, Chonbuk National University, Jeonju 561-756, Korea.
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Oh NS, Kwon HS, Lee HA, Joung JY, Lee JY, Lee KB, Shin YK, Baick SC, Park MR, Kim Y, Lee KW, Kim SH. Preventive effect of fermented Maillard reaction products from milk proteins in cardiovascular health. J Dairy Sci 2014; 97:3300-13. [PMID: 24731635 DOI: 10.3168/jds.2013-7728] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2013] [Accepted: 02/18/2014] [Indexed: 12/17/2022]
Abstract
The aim of this study was to determine the dual effect of Maillard reaction and fermentation on the preventive cardiovascular effects of milk proteins. Maillard reaction products (MRP) were prepared from the reaction between milk proteins, such as whey protein concentrates (WPC) and sodium caseinate (SC), and lactose. The hydrolysates of MRP were obtained from fermentation by lactic acid bacteria (LAB; i.e., Lactobacillus gasseri H10, L. gasseri H11, Lactobacillus fermentum H4, and L. fermentum H9, where human-isolated strains were designated H1 to H15), which had excellent proteolytic and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activities (>20%). The antioxidant activity of MRP was greater than that of intact proteins in assays of the reaction with 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt and trivalent ferric ions; moreover, the effect of MRP was synergistically improved by fermentation. The Maillard reaction dramatically increased the level of antithrombotic activity and 3-hydroxy-3-methylglutaryl-CoA reductase (HMGR) inhibitory effect of milk proteins, but did not change the level of activity for micellar cholesterol solubility. Furthermore, specific biological properties were enhanced by fermentation. Lactobacillus gasseri H11 demonstrated the greatest activity for thrombin and HMGR inhibition in Maillard-reacted WPC, by 42 and 33%, respectively, whereas hydrolysates of Maillard-reacted SC fermented by L. fermentum H9 demonstrated the highest reduction rate for micellar cholesterol solubility, at 52%. In addition, the small compounds that were likely released by fermentation of MRP were identified by size-exclusion chromatography. Therefore, MRP and hydrolysates of fermented MRP could be used to reduce cardiovascular risks.
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Affiliation(s)
- N S Oh
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, South Korea; Division of Food Bioscience and Technology, College of Life Science and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - H S Kwon
- Division of Food Bioscience and Technology, College of Life Science and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - H A Lee
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, South Korea
| | - J Y Joung
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, South Korea
| | - J Y Lee
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, South Korea
| | - K B Lee
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, South Korea
| | - Y K Shin
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, South Korea
| | - S C Baick
- R&D Center, Seoul Dairy Cooperative, Ansan, Kyunggi 425-839, South Korea
| | - M R Park
- BK21 Plus Graduate Program, Department of Animal Science and Institute of Rare Earth for Biological Application, Chonbuk National University, Jeonju, 561-756, South Korea
| | - Y Kim
- BK21 Plus Graduate Program, Department of Animal Science and Institute of Rare Earth for Biological Application, Chonbuk National University, Jeonju, 561-756, South Korea
| | - K W Lee
- Division of Food Bioscience and Technology, College of Life Science and Biotechnology, Korea University, Seoul 136-701, South Korea
| | - S H Kim
- Division of Food Bioscience and Technology, College of Life Science and Biotechnology, Korea University, Seoul 136-701, South Korea.
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