1
|
Biki SP, Mahmud S, Akhter S, Rahman MH, Ahmed M. Bacteriocin production by
Lactococcus lactis
LL‐HSTU‐FPP
strain isolated from fermented rice and evaluation of the biopreservation potentiality of bacteriocin on shrimp. J Food Saf 2023. [DOI: 10.1111/jfs.13042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Suchi Parvin Biki
- Department of Food Processing and Preservation Hajee Mohammad Danesh Science & Technology University Dinajpur Bangladesh
| | - Shobuz Mahmud
- Department of Food Processing and Preservation Hajee Mohammad Danesh Science & Technology University Dinajpur Bangladesh
| | - Sumaia Akhter
- Department of Food Processing and Preservation Hajee Mohammad Danesh Science & Technology University Dinajpur Bangladesh
| | - Md. Hassanur Rahman
- Department of Horticulture Hajee Mohammad Danesh Science and Technology University Dinajp Bangladesh
| | - Maruf Ahmed
- Department of Food Processing and Preservation Hajee Mohammad Danesh Science & Technology University Dinajpur Bangladesh
| |
Collapse
|
2
|
Immunomodulatory action of Lactococcuslactis. J Biosci Bioeng 2023; 135:1-9. [PMID: 36428209 DOI: 10.1016/j.jbiosc.2022.10.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 09/07/2022] [Accepted: 10/24/2022] [Indexed: 11/24/2022]
Abstract
Fermented foods are gaining popularity due to health-promoting properties with high levels of nutrients, phytochemicals, bioactive compounds, and probiotic microorganisms. Due to its unique fermentation process, Lactococcus lactis plays a key role in the food business, notably in the manufacturing of dairy products. The superior biological activities of L. lactis in these functional foods include anti-inflammatory and immunomodulatory capabilities. L. lactis boosted growth performance, controlled amino acid profiles, intestinal immunology, and microbiota. Besides that, the administration of L. lactis increased the rate of infection clearance. Innate and acquired immune responses would be upregulated in both local and systemic compartments, resulting in these consequences. L. lactis is often employed in the food sector and is currently being exploited as a delivery vehicle for biological research. These bacteria are being eyed as potential candidates for biotechnological applications. With this in mind, we reviewed the immunomodulatory effects of different L. lactis strains.
Collapse
|
3
|
Barman S, Ghosh R, Mandal NC. Production optimization of broad spectrum bacteriocin of three strains of Lactococcus lactis isolated from homemade buttermilk. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.aasci.2018.05.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
4
|
Bacteriocin-Producing Lactic Acid Bacteria Isolated from Mangrove Forests in Southern Thailand as Potential Bio-Control Agents: Purification and Characterization of Bacteriocin Produced by Lactococcus lactis subsp. lactis KT2W2L. Probiotics Antimicrob Proteins 2016; 5:264-78. [PMID: 26783072 DOI: 10.1007/s12602-013-9150-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The aim of this work was to purify and characterize the bacteriocin produced by Lactococcus lactis subsp. lactis KT2W2L previously isolated from mangrove forests in southern Thailand, in order to evaluate its potential as new food protective agent. The active peptide from the cell-free supernatant of this strain was purified in 4 steps: (1) precipitation with 70 % saturated ammonium sulfate, (2) elution on a reversed-phase cartridge using different concentrations of acetonitrile, (3) cation-exchange chromatography and (4) final purification by reversed-phase HPLC on a C8 column. The molecular mass of 3,329.5254 Da of the purified bacteriocin, determined by mass spectrometry, is nearly identical to that of peptide nisin Z. The activity of the purified bacteriocin was unaffected by pH (2.0-10.0), thermostable but was sensitive to proteolytic enzymes. The bacteriocin activity was stable after 8 weeks of storage at -20 °C and 7 weeks of storage at 4 °C, but decreased after 3 weeks of storage at 37 °C. It was stable when incubated for 1 month at 4 °C in 0-30 % NaCl. Inhibitory spectrum of this bacteriocin showed a wide range of activity against similar bacterial strains, food-spoilage and food-borne pathogens. L. lactis subsp. lactis KT2W2L was sensitive to kanamycin, penicillin and tetracycline but resistant to ampicillin, gentamicin and vancomycin. The fragment obtained after amplification of genomic DNA from L. lactis subsp. lactis KT2W2L, with specific primers for bacteriocin genes, presented 99 % homology to the nisin Z gene. PCR amplification demonstrated that L. lactis subsp. lactis KT2W2L does not harbor virulence genes cylA, cylB, efaAfs and esp. The bacteriocin and its producing strain may find application as bio-preservatives for reduction in food-spoilage and food-borne pathogens in food products.
Collapse
|
5
|
Kırmacı H, Hayaloğlu A, Özer H, Atasoy A, Türkoğlu H. Evolution of proteolysis in Urfa cheese made from ewe's milk by wild type starter culture systems. Small Rumin Res 2014. [DOI: 10.1016/j.smallrumres.2014.01.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
6
|
Physical chemical and biological characterization of a new bacteriocin produced by Bacillus cereus NS02. ASIAN PAC J TROP MED 2014; 6:934-41. [PMID: 24144023 DOI: 10.1016/s1995-7645(13)60167-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 08/15/2013] [Accepted: 09/15/2013] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE To screen the bacteriocinogenic isolate from buffalo milk and to characterize it on physical, chemical and biological aspects for the application in biopreservation. METHODS Bacillus cereus (B. cereus) was isolated and assessed for its baceteriocinogenic activity. Bacteriocin was produced and purified by ammonium sulphate precipitation, dialysis and gel filtration chromatography. Purified bacteriocin was used to check its antimicrobial activity against food borne bacteria. Effect and stability of bacteriocin was determined with the respect to temperature, pH, enzymes, organic solvents and chemicals. Bacteriocin was also subjected to SDS PAGE analysis to determine its molecular weight. In addition, functional groups exist in the bacteriocin was determined by FTIR analysis. RESULTS B. cereus was identified by 16S rRNA sequence analysis. Bacteriocin showed increased activity against all the bacteria used and its activity unit was found to be 51, 200 AU/mL. It was stable to high temperature (100 °C) and wide range of pH (3-10), sensitive to proteolytic enzymes and resistant to nonproteolytic enzymes. It was low molecular weight (3.5 - 6 KDa) protein and FTIR study revealed the presence of amide group and NH stretching. CONCLUSIONS Bacteriocin produced in this study possesses the highest antimicrobial activity against both gram positive and gram negative bacteria thereby it has immense application as biopreservative agent. FTIR proved its peptide nature.
Collapse
|
7
|
Sonorensin: an antimicrobial peptide, belonging to the heterocycloanthracin subfamily of bacteriocins, from a new marine isolate, Bacillus sonorensis MT93. Appl Environ Microbiol 2014; 80:2981-90. [PMID: 24610839 DOI: 10.1128/aem.04259-13] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Marine environments are the greatest fronts of biodiversity, representing a resource of unexploited or unknown microorganisms and new substances having potential applications. Among microbial products, antimicrobial peptides (AMPs) have received great attention recently due to their applications as food preservatives and therapeutic agents. A new marine soil isolate producing an AMP was identified as Bacillus sonorensis based on 16S rRNA gene sequence analysis. It produced an AMP that showed a broad spectrum of activity against both Gram-positive and Gram-negative bacteria. The peptide, named sonorensin, was purified to homogeneity using a combination of chromatographic techniques. The intact molecular mass of the purified peptide, 6,274 Da, as revealed by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF), was in agreement with Tricine-SDS-PAGE analysis. A PCR array of primers was used to identify AMP structural genes, which allowed the successful amplification of the related genes from strain MT93. The putative open reading frame of sonorensin was amplified, cloned into the pET-32a(+) vector, expressed as a thioredoxin (Trx) fusion protein in Escherichia coli, and then purified. Sequence alignment analysis revealed that the bacteriocin being reported could belong to new subfamily of bacteriocins, heterocycloanthracin. The peptide indicated its potential as a biocontrol agent or food antimicrobial agent, due to its antimicrobial activity against bacteria such as Listeria monocytogenes and Staphylococcus aureus. This is the first report of the production, purification, and characterization of wild-type and recombinant bacteriocin by B. sonorensis and the first bacteriocin of the heterocycloanthracin subfamily to be characterized.
Collapse
|
8
|
Pseudomonas putida Strain FStm2 Isolated from Shark Skin: A Potential Source of Bacteriocin. Probiotics Antimicrob Proteins 2013; 5:165-75. [DOI: 10.1007/s12602-013-9140-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
9
|
Kumari A, Akkoç N, Akçelik M. Purification and partial characterization of bacteriocin produced by Lactococcus lactis ssp. lactis LL171. World J Microbiol Biotechnol 2011; 28:1647-55. [PMID: 22805947 DOI: 10.1007/s11274-011-0971-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Accepted: 11/29/2011] [Indexed: 11/26/2022]
Abstract
Lactic acid bacteria (LAB) are possessing ability to synthesize antimicrobial compounds (like bacteriocin) during their growth. In this regard, novel bacteriocin compound secreting capability of LAB isolated from Tulum Cheese in Turkey was demonstrated. The synthesized bacteriocin was purified by ammonium sulphate precipitation, dialysis and gel filtration. The molecular weight (≈3.4 kDa) of obtained bacteriocin was confirmed by SDS-PAGE, which revealed single peptide band. Molecular identification of LAB strain isolated from Tulum Cheese was conducted using 16S rDNA gene sequencing as Lactococcus lactis ssp. lactis LL171. The amino acid sequences (KKIDTRTGKTMEKTEKKIELSLKNMKTAT) of the bacteriocin from Lactococcus lactis ssp. lactis LL171 was found unique and novel than reported bacteriocins. Further, the bacteriocin was possessed the thermostable property and active at wide range of pH values from 1 to 11. Thus, bacteriocin reported in this study has the potential applications property as food preservative agent.
Collapse
Affiliation(s)
- Archana Kumari
- Department of Biology, Faculty of Science, Ankara University, Tandoğan, 06100, Ankara, Turkey.
| | | | | |
Collapse
|
10
|
Renye J, Somkuti G, Garabal J, Du L. Heterologous production of pediocin for the control of Listeria monocytogenes in dairy foods. Food Control 2011. [DOI: 10.1016/j.foodcont.2011.04.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
11
|
KIRMACI HÜSEYINA, HAYALOGLU ALIA, ÖZER BARBAROS, AKÇELIK MUSTAFA, AKKOÇ NEFISE. Proteolytic properties of Turkish white-brined cheese (Beyaz peynir) made by using wild-type Lactococcal strains. INT J DAIRY TECHNOL 2011. [DOI: 10.1111/j.1471-0307.2011.00673.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
12
|
Chen YS, Wu HC, Yanagida F. Isolation and characteristics of lactic acid bacteria isolated from ripe mulberries in Taiwan. Braz J Microbiol 2010; 41:916-21. [PMID: 24031571 PMCID: PMC3769767 DOI: 10.1590/s1517-838220100004000010] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2009] [Revised: 02/09/2010] [Accepted: 04/26/2010] [Indexed: 11/29/2022] Open
Abstract
The objective of this study was to isolate, characterize, and identify lactic acid bacteria (LAB) from ripe mulberries collected in Taiwan. Ripe mulberry samples were collected at five mulberry farms, located in different counties of Taiwan. Eighty-eight acid-producing cultures were isolated from these samples, and isolates were divided into classes first by phenotype, then into groups by restriction fragment length polymorphism (RFLP) analysis and sequencing of 16S ribosomal DNA (rDNA). Phenotypic and biochemical characteristics led to identification of four bacterial groups (A to D). Weissella cibaria was the most abundant type of LAB distributed in four mulberry farms, and Lactobacillus plantarum was the most abundant LAB found in the remaining farm. Ten W. cibaria and one Lactococcus lactis subsp. lactis isolate produced bacteriocins against the indicator strain Lactobacillus sakei JCM 1157T. These results suggest that various LAB are distributed in ripe mulberries and W. cibaria was the most abundant LAB found in this study.
Collapse
Affiliation(s)
- Yi-Sheng Chen
- Department of Biotechnology, Ming Chuan University , No. 5, De-Ming Rd., Gui-Shan Township, Taoyuan County 333 , Taiwan
| | | | | |
Collapse
|
13
|
Kim SY, Shin S, Koo HC, Youn JH, Paik HD, Park YH. In vitro antimicrobial effect and in vivo preventive and therapeutic effects of partially purified lantibiotic lacticin NK34 against infection by Staphylococcus species isolated from bovine mastitis. J Dairy Sci 2010; 93:3610-5. [PMID: 20655430 DOI: 10.3168/jds.2010-3129] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2010] [Accepted: 04/20/2010] [Indexed: 11/19/2022]
Abstract
Lantibiotics are small (<5 kDa), polycyclic peptides produced by gram-positive bacteria; they are also known as gram-positive bacteriocins. The high antimicrobial activity of lacticins and the continuing appearance of antibiotic-resistant bacteria in recent years have resulted in a renewed interest in lantibiotics. A partially purified form of lacticin NK34 (a Lactococcus lactis product isolated from the Korean fermented fish jeotgal) was tested to determine its antimicrobial effects against Staphylococcus aureus (n=20) and coagulase-negative Staphylococcus (CNS, n=20) strains isolated from the raw milk of cows with subclinical bovine mastitis in the present study. The spot-on-lawn assay was used to identify the 2 strains from each group with the greatest lacticin NK34 susceptibility, and the minimal lethal dose (MLD) was measured in ICR (imprinting control region) mice. The preventive and therapeutic effects of lacticin NK34 on the mouse infection model were determined for the first time. Lacticin NK34 demonstrated antimicrobial effects in 14 of 20 (70%) S. aureus indicator strains and in 18 of 20 (90%) CNS strains. Staphylococcus aureus 69 and S. simulans 55 demonstrated the greatest susceptibility to lacticin NK34 in the spot-on-lawn assay. The S. aureus 69 MLD was measured at 1.53 x 10(9) cfu/mouse, whereas the S. simulans 55 MLD was 3.59 x 10(9) cfu/mouse. Mice infected experimentally with S. aureus 69 MLD or S. simulans 55 MLD were treated with lacticin NK34. Treated mice demonstrated an 80% survival rate (48 of 60 mice) compared with a survival rate of 7.5% (3 of 40 mice) in control mice treated with distilled water. These data suggest that lacticin NK34 might be useful in the control of bovine mastitis and systemic bacterial infection.
Collapse
Affiliation(s)
- S Y Kim
- Department of Microbiology, College of Veterinary Medicine and BK21 Program for Veterinary Science, Seoul National University, Seoul 151-742, Korea
| | | | | | | | | | | |
Collapse
|
14
|
Abdel-Mohsein H, Yamamoto N, Otawa K, Tada C, Nakai Y. Isolation of bacteriocin-like substances producing bacteria from finished cattle-manure compost and activity evaluation against some food-borne pathogenic and spoilage bacteria. J GEN APPL MICROBIOL 2010; 56:151-61. [PMID: 20513963 DOI: 10.2323/jgam.56.151] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A finished compost sample was examined for bacteriocin-like substance production against five pathogenic bacteria: Salmonella typhimurium EF 85-9, Escherichia coli O157:H7 ATCC 43888, Enterococcus faecalis JCM 8726, Staphylococcus aureus JCM 2151, and Yersinia enterocolitica JCM 7577. At the preliminary detection of bacterial strains exhibiting antimicrobial activity from the compost sample, thirteen strains could be isolated. Screening of the inhibitory activity was done using agar-well diffusion assay and Microtiter plate growth assay. Six bacterial strains from the compost showed an antimicrobial activity against one or more of the tested indicator strains. Four strains (M1-M4) belonged to Shigella species and the other two strains (M5 and M6) belonged to Salmonella species. The antimicrobial activity was sensitive for alpha-chymotrypsin and papain. The antimicrobial substances from M3, M4 and M6 were heat stable when heated for 15 min at 121 degrees C with 100% relative activity. The bacteriocin-like substance produced by strain M2 was partially characterized. It exhibited an inhibitory activity against the tested food-borne pathogenic and spoilage bacteria, except Enterobacter aerogenes JCM 1235 and Lactobacillus plantarum subsp. plantarum JCM 1149. It was stable at a wide range of pH (3-11). There was no loss of activity for up to 3 weeks when stored at 4 and -20 degrees C or for up to 2 weeks when stored at 28 and -80 degrees C. This is the first report indicating the presence of bacteriocin-like activity in animal manure compost.
Collapse
Affiliation(s)
- Hosnia Abdel-Mohsein
- Sustainable Environmental Biology, Graduate School of Agricultural Science, Tohoku University, Osaki, Miyagi, Japan
| | | | | | | | | |
Collapse
|
15
|
Aleksandrova V, Filipova D, Dimov S. Elaboration of PCR Primers for Bacteriocin Genetic Determinants Detection. BIOTECHNOL BIOTEC EQ 2010. [DOI: 10.1080/13102818.2010.10817926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
16
|
Renye JA, Somkuti GA. Nisin-induced expression of pediocin in dairy lactic acid bacteria. J Appl Microbiol 2009; 108:2142-51. [PMID: 19929951 DOI: 10.1111/j.1365-2672.2009.04615.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIMS To test whether a single vector, nisin-controlled expression (NICE) system could be used to regulate expression of the pediocin operon in Streptococcus thermophilus, Lactococcus lactis subsp. lactis and Lactobacillus casei. METHODS AND RESULTS The intact pediocin operon was cloned immediately into pMSP3535 downstream of the nisA promoter (PnisA). The resulting vector, pRSNPed, was electrotransformed into Strep. thermophilus ST128, L. lactis subsp. lactis ML3 and Lact. casei C2. Presence of the intact vector was confirmed by PCR, resulting in the amplification of a 0.8-kb DNA fragment, and inhibition zones were observed for all lactic acid bacteria (LAB) transformants following induction with 50 ng ml(-1) nisin, when Listeria monocytogenes Scott A was used as the target bacterium. Using L. monocytogenes NR30 as target, the L. lactis transformants produced hazy zones of inhibition, while the Lact. casei transformants produced clear zones of inhibition. Zones of inhibition were not observed when the Strep. thermophilus transformants were tested against NR30. CONCLUSIONS The LAB hosts were able to produce enough pediocin to inhibit the growth of L. monocytogenes Scott A; the growth of L. monocytogenes NR30 was effectively inhibited only by the Lact. casei transformants. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first time that the NICE system has been used to express the intact pediocin operon in these LAB hosts. This system could allow for the in situ production of pediocin in fermented dairy foods supplemented with nisin to prevent listeria contamination.
Collapse
Affiliation(s)
- J A Renye
- Eastern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, Wyndmoor, PA 19038, USA.
| | | |
Collapse
|
17
|
|
18
|
AKKOÇ NEFİSE, ŞİMŞEK ÖMER, AKÇELİK MUSTAFA. Determination of metabolic plasmids and their effects on the growth ofLactococcus lactisssp.lactisMN24. INT J DAIRY TECHNOL 2009. [DOI: 10.1111/j.1471-0307.2008.00455.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
19
|
Influence of growth conditions on the nisin production of bioengineered Lactococcus lactis strains. J Ind Microbiol Biotechnol 2009; 36:481-90. [DOI: 10.1007/s10295-008-0517-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Accepted: 12/09/2008] [Indexed: 11/25/2022]
|
20
|
Tiwari SK, Srivastava S. Characterization of a Bacteriocin fromLactobacillus plantarumStrain LR/14. FOOD BIOTECHNOL 2008. [DOI: 10.1080/08905430802262582] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
21
|
Yanagida F, Srionnual S, Chen YS. Isolation and characteristics of lactic acid bacteria from koshu vineyards in Japan. Lett Appl Microbiol 2008; 47:134-9. [PMID: 18673430 DOI: 10.1111/j.1472-765x.2008.02398.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To isolate, characterize and identify lactic acid bacteria (LAB) in the vineyards where koshu grapes, a primary wine grape cultivar in Japan, are grown. METHODS AND RESULTS Sixty samples, including leaves, undamaged grape berries and soil under damaged berries, were collected at four koshu vineyards in Yamanashi Prefecture, Japan. One hundred and 15 acid-producing cultures were isolated from these samples, and the isolates were divided into classes by phenotype and then into groups by restriction fragment length polymorphism analysis and sequencing of 16S ribosomal DNA (rDNA). Phenotypic and biochemical characteristics identified seven different bacterial groups (A to G). Lactococcus lactis ssp. lactis was the most abundant type of LAB distributed in three koshu vineyards, and Leuconostoc pseudomesenteroides was the most abundant LAB found in the remaining vineyard. Forty-six isolates produced bacteriocin-like inhibitory substances (BLIS) against the indicator strain Lactobacillus sakei JCM 1157(T). CONCLUSIONS These results suggest that various LAB are distributed in koshu vineyards, of which a large number produce BLIS. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report describing the distribution and varieties of LAB that exist in koshu vineyards.
Collapse
Affiliation(s)
- F Yanagida
- The Institute of Enology and Viticulture, University of Yamanashi, Yamanashi, Japan
| | | | | |
Collapse
|
22
|
Özkalp B, Özden B, Tuncer Y, Şanlibaba P, Akçelik M. Technological characterization of wild-typeLactococcus lactisstrains isolated from raw milk and traditional fermented milk products in Turkey. ACTA ACUST UNITED AC 2008. [DOI: 10.1051/lait:2007033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
|
23
|
McVay MR, Boneti C, Habib CM, Keller JE, Kokoska ER, Jackson RJ, Smith SD. Formula fortified with live probiotic culture reduces pulmonary and gastrointestinal bacterial colonization and translocation in a newborn animal model. J Pediatr Surg 2008; 43:25-9; discussion 29. [PMID: 18206450 DOI: 10.1016/j.jpedsurg.2007.09.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2007] [Accepted: 09/02/2007] [Indexed: 01/15/2023]
Abstract
BACKGROUND/PURPOSE Acidified diets are protective against intestinal bacterial colonization and translocation. Probiotic diets are designed to modulate the intestinal flora to enhance mucosal immunity. This study was designed to determine if formula acidified with live probiotic decreases bacterial gut colonization and translocation, and is equally tolerated as other acidified diets. METHODS One hundred twenty-eight rabbit pups delivered via cesarean section [cesarean delivery, cesarean birth, abdominal delivery] were randomly assigned to 4 feeding groups: NAN Nestle (control, pH 7.0), NAN acidified with citric acid (pH 4.55), biologically acidified Pelargon (pH 4.55), and NAN with live Lactococcus lactis culture (pH 4.2). Pups were gavage fed every 12 hours with Enterobacter cloacae challenges of 10 colony-forming units/mL per feed and killed on day of life 3. Lungs, liver, spleen, mesenteric lymph nodes (MLNs), stomach, and cecum were cultured and quantitatively analyzed for target organism growth. Results were analyzed using chi(2) tests. RESULTS NAN with live probiotic culture, when compared with Pelargon, acidified NAN, and NAN, significantly reduced the incidence of Enterobacter pulmonary colonization (P < .01), bacterial translocation (liver, P < .025; spleen and MLN, P < .05), and gastric and intestinal colonization (P < .001 for both). CONCLUSION Probiotic-fortified formula provides superior protection against pulmonary and gastrointestinal bacterial colonization and translocation compared with neutral and acidified formulas, and is equally tolerated.
Collapse
Affiliation(s)
- Marcene R McVay
- Arkansas Children's Hospital, University of Arkansas for Medical Sciences, Little Rock, AR 72202-3591, USA
| | | | | | | | | | | | | |
Collapse
|
24
|
Dufour A, Hindré T, Haras D, Le Pennec JP. The biology of lantibiotics from the lacticin 481 group is coming of age. FEMS Microbiol Rev 2006; 31:134-67. [PMID: 17096664 DOI: 10.1111/j.1574-6976.2006.00045.x] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Lantibiotics are antimicrobial peptides from the bacteriocin family, secreted by Gram-positive bacteria. These peptides differ from other bacteriocins by the presence of (methyl)lanthionine residues, which result from enzymatic modification of precursor peptides encoded by structural genes. Several groups of lantibiotics have been distinguished, the largest of which is the lacticin 481 group. This group consists of at least 16 members, including lacticin 481, streptococcin A-FF22, mutacin II, nukacin ISK-1, and salivaricins. We present the first review devoted to this lantibiotic group, knowledge of which has increased significantly within the last few years. After updating the group composition and defining the common properties of these lantibiotics, we highlight the most recent developments. The latter concern: transcriptional regulation of the lantibiotic genes; understanding the biosynthetic machinery, in particular the ability to perform in vitro prepeptide maturation; characterization of a novel type of immunity protein; and broad application possibilities. This group differs in many aspects from the best known lantibiotic group (nisin group), but shares properties with less-studied groups such as the mersacidin, cytolysin and lactocin S groups.
Collapse
Affiliation(s)
- Alain Dufour
- Laboratoire de Biotechnologie et Chimie Marines, EA3884, Université de Bretagne Sud, Lorient, France.
| | | | | | | |
Collapse
|