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Aktas B, Budinich M, Hoza L, Rankin SA, Broadbent JR, Steele JL. Shelf-life studies of putative probiotic Lacticaseibacillus casei strains in milk and model yogurt. FOOD SCI TECHNOL INT 2023; 29:729-738. [PMID: 35790393 DOI: 10.1177/10820132221112260] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Lacticaseibacillus casei are commonly utilized as probiotic in a wide-range of fermented and unfermented dairy products. The stability of probiotics in fermented dairy products during shelf-life is of concern due to low pH and high level of organic acids. The objective of this study is to evaluate L. casei for their ability to survive in a model yogurt and fluid milk; additionally, their impact on the pH, organic acids, and sensory attributes of these products was examined. The strain-to-strain differences in cell densities in yogurt and milk inoculated at a therapeutic level at the end of shelf-life were 1.2 and 1.4 log CFU/mL, respectively. Five of the strains examined increased the pH of the yogurt, while two strains were observed to reduce the pH. In milk, one strain raised the pH, while eleven strains reduced the pH. The levels of lactate, acetate, and formate in both the yogurt and milk were altered in a strain-specific manner. The results suggested that the metabolism by these strains differed significantly during the shelf-life. Careful strain selection is required to identify probiotic L. casei strains that will survive through shelf-life in either yogurt or fluid milk and not impact product quality.
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Affiliation(s)
- Busra Aktas
- Department of Food Science, University of Wisconsin, Madison, WI, USA
| | - Mateo Budinich
- Department of Food Science, University of Wisconsin, Madison, WI, USA
| | - Lulu Hoza
- Department of Food Science, University of Wisconsin, Madison, WI, USA
| | - Scott A Rankin
- Department of Food Science, University of Wisconsin, Madison, WI, USA
| | - Jeff R Broadbent
- Department of Nutrition, Dietetics, and Food Sciences, Utah State University, Logan, UT, USA
| | - James L Steele
- Department of Food Science, University of Wisconsin, Madison, WI, USA
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2
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Boeck T, Ispiryan L, Hoehnel A, Sahin AW, Coffey A, Zannini E, Arendt EK. Lentil-Based Yogurt Alternatives Fermented with Multifunctional Strains of Lactic Acid Bacteria—Techno-Functional, Microbiological, and Sensory Characteristics. Foods 2022; 11:foods11142013. [PMID: 35885256 PMCID: PMC9317967 DOI: 10.3390/foods11142013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 06/30/2022] [Accepted: 07/03/2022] [Indexed: 01/27/2023] Open
Abstract
A milk-alternative produced from lentil protein isolate was fermented with three multifunctional strains of lactic acid bacteria, Leuconostoc citreum TR116, Leuconostoc pseudomesenteroides MP070, and Lacticaseibacillus paracasei FST 6.1. As a control, a commercial starter culture containing Streptococcus thermophilus was used. The metabolic performance of these strains and the techno-functional properties of the resulting yogurt alternatives (YA) were studied. Microbial growth was evaluated by cell counts, acidification, and carbohydrate metabolization. The structure of the YA was investigated by textural and rheological analyses and confocal laser scanning microscopy (CLSM). Production of antifungal compounds, the influence of fermentation on the content of FODMAPs, and typical metabolites were analyzed, and a sensory analysis was performed. The results revealed an exponential microbial growth in the lentil base substrate supported by typical acidification, which indicates a suitable environment for the selected strains. The resulting YA showed a gel-like texture typical for non-stirred yogurts, and high water holding capacity. The tested strains produced much higher levels of antifungal phenolic compounds than the commercial control and are therefore promising candidates as adjunct cultures for shelf-life extension. The Leuconostoc strains produced mannitol from fructose and could thus be applied in sugar-reduced YA. Preliminary sensory analysis showed high acceptance for YA produced with Lacticaseibacillus paracasei FST 6.1, and a yogurt-like flavor not statistically different to that produced by the control. Overall, each tested strain possessed promising functionalities with great potential for application in fermented plant-based dairy-alternatives.
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Affiliation(s)
- Theresa Boeck
- School of Food and Nutritional Sciences, University College Cork, T12 K8AF Cork, Ireland; (T.B.); (L.I.); (A.H.); (A.W.S.); (E.K.A.)
| | - Lilit Ispiryan
- School of Food and Nutritional Sciences, University College Cork, T12 K8AF Cork, Ireland; (T.B.); (L.I.); (A.H.); (A.W.S.); (E.K.A.)
| | - Andrea Hoehnel
- School of Food and Nutritional Sciences, University College Cork, T12 K8AF Cork, Ireland; (T.B.); (L.I.); (A.H.); (A.W.S.); (E.K.A.)
| | - Aylin W. Sahin
- School of Food and Nutritional Sciences, University College Cork, T12 K8AF Cork, Ireland; (T.B.); (L.I.); (A.H.); (A.W.S.); (E.K.A.)
| | - Aidan Coffey
- Department of Biological Sciences, Munster Technological University, T12 P928 Cork, Ireland;
- APC Microbiome Ireland, University College Cork, T12 K8AF Cork, Ireland
| | - Emanuele Zannini
- School of Food and Nutritional Sciences, University College Cork, T12 K8AF Cork, Ireland; (T.B.); (L.I.); (A.H.); (A.W.S.); (E.K.A.)
- Correspondence:
| | - Elke K. Arendt
- School of Food and Nutritional Sciences, University College Cork, T12 K8AF Cork, Ireland; (T.B.); (L.I.); (A.H.); (A.W.S.); (E.K.A.)
- APC Microbiome Ireland, University College Cork, T12 K8AF Cork, Ireland
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3
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Dynamics of Changes in pH and the Contents of Free Sugars, Organic Acids and LAB in Button Mushrooms during Controlled Lactic Fermentation. Foods 2022; 11:foods11111553. [PMID: 35681303 PMCID: PMC9180291 DOI: 10.3390/foods11111553] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/23/2022] [Accepted: 05/24/2022] [Indexed: 02/01/2023] Open
Abstract
The aim of the study was to assess changes in the basic quality parameters induced by controlled lactic fermentation of fruiting bodies of the button mushroom (Agaricus bisporus). Lactiplantibacillus plantarum 299v with documented probiotic properties and L. plantarum EK3, i.e., an isolate obtained from spontaneously fermented button mushrooms, were used as starter strains. The fruiting bodies of fresh, blanched, and fermented mushrooms were analyzed at different stages of the lactic fermentation process. The content of free sugars (high-performance liquid chromatography with charged aerosol detector method; HPLC-CAD) and organic acids (high-performance liquid chromatography with diode array detector method; HPLC-DAD) was determined both in the mushroom fruiting bodies and in the brine. Five free sugars (ribose, trehalose, sucrose, glucose, and fructose), mannitol, and six organic acids (lactic, malic, succinic, citric, acetic, and fumaric acids) were detected in the samples. Lactic acid dominated in the final products. The starter cultures exhibited varying degrees of utilization of available mushroom sugars and sucrose used as an additional substrate. Sucrose was utilized at a higher rate and in greater amounts by the L. plantarum EK3 isolate. This starter culture was characterized by a significantly higher final amount of produced lactic acid, a lower pH value, and higher numbers of LAB (lactic acid bacteria). These important quality parameters largely determine the stability of fermented products. Based on the analysis results and the high scores in the organoleptic evaluation of the fermented mushrooms, the L. plantarum EK3 isolate can be recommended as an appropriate starter culture for lactic fermentation of mushroom fruiting bodies.
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Aditya A, Li Y, Biswas D. Antagonistic Effects of Conjugated Linoleic Acids of Lactobacillus casei against Foodborne Enterohemorrhagic Escherichia coli. J Food Prot 2022; 85:712-719. [PMID: 35113991 DOI: 10.4315/jfp-21-414] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 02/01/2022] [Indexed: 11/11/2022]
Abstract
ABSTRACT Probiotics in fermented foods or commercially available supplements benefit the host by providing metabolites and peptides. The production of these metabolites varies with the available substrates or prebiotics present in the system and their concentration. In this study, 0.5% peanut flour (PF) was used to stimulate the growth and production of metabolites of wild-type Lactobacillus casei (LCwt) and compare with an engineered L. casei (LCCLA) capable of converting a higher amount of conjugated linoleic acid (CLA). The total extracellular metabolites present in the cell-free cultural supernatant (CFCS) of LCwt (without peanut), LCwt+PF (with peanut), and LCCLA were collected after 24 and 48 h of incubation, and their antagonistic activities against enterohemorrhagic Escherichia coli (EHEC EDL933) growth and pathogenesis were evaluated. All collected metabolites exhibited varying efficiency in restraining EHEC EDL933 growth, whereas supplementing a low concentration of CLA to the 48-h CFCS from LCwt showed augmented antagonism toward EHEC EDL933. A downregulation of key virulence genes was observed from metabolites collected at the 48-h time point. These observations indicate that the presence of metabolites in CFCSs-including CLA, which is produced by Lactobacillus and was identified by gas chromatography-mass spectrometry-plays a critical role. This study demonstrates the potential applicability of Lactobacillus-originated CLA in the prevention of EHEC EDL933-mediated illnesses. HIGHLIGHTS
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Affiliation(s)
- Arpita Aditya
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland 20742, USA
| | - Yue Li
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
| | - Debabrata Biswas
- Department of Animal and Avian Sciences, University of Maryland, College Park, Maryland 20742, USA.,Biological Sciences Program, University of Maryland, College Park, Maryland 20742, USA.,Centre for Food Safety and Security Systems, University of Maryland, College Park, Maryland 20742, USA
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5
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Shah SS, Al-Naseri A, Rouch D, Bowman JP, Wilson R, Baker AL, Britz ML. Properties of an acid-tolerant, persistent Cheddar cheese isolate, Lacticaseibacillus paracasei GCRL163. J Ind Microbiol Biotechnol 2021; 48:kuab070. [PMID: 34555172 PMCID: PMC8788758 DOI: 10.1093/jimb/kuab070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Accepted: 09/11/2021] [Indexed: 11/18/2022]
Abstract
The distinctive flavours in hard cheeses are attributed largely to the activity of nonstarter lactic acid bacteria (NSLAB) which dominate the cheese matrix during maturation after lactose is consumed. Understanding how different strains of NSLAB survive, compete, and scavenge available nutrients is fundamental to selecting strains as potential adjunct starters which may influence product traits. Three Lacticaseibacillus paracasei isolates which dominated at different stages over 63-week maturation periods of Australian Cheddar cheeses had the same molecular biotype. They shared many phenotypic traits, including salt tolerance, optimum growth temperature, growth on N-acetylglucosamine and N-acetylgalactosamine plus delayed growth on D-ribose, carbon sources likely present in cheese due to bacterial autolysis. However, strains 124 and 163 (later named GCRL163) survived longer at low pH and grew on D-tagatose and D-mannitol, differentiating this phenotype from strain 122. When cultured on growth-limiting lactose (0.2%, wt/vol) in the presence of high concentrations of L-leucine and other amino acids, GCRL163 produced, and subsequently consumed lactate, forming acetic and formic acids, and demonstrated temporal accumulation of intermediates in pyruvate metabolism in long-term cultures. Strain GCRL163 grew in Tween 80-tryptone broths, a trait not shared by all L. casei-group dairy isolates screened in this study. Including citrate in this medium stimulated growth of GCRL163 above citrate alone, suggesting cometabolism of citrate and Tween 80. Proteomic analysis of cytosolic proteins indicated that growth in Tween 80 produced a higher stress state and increased relative abundance of three cell envelope proteinases (CEPs) (including PrtP and Dumpy), amongst over 230 differentially expressed proteins.
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Affiliation(s)
- Syed S Shah
- Food Safety and Innovation Centre, Tasmanian Institute of Agriculture, University of Tasmania, Hobart 7005, Australia
| | - Ali Al-Naseri
- Food Safety and Innovation Centre, Tasmanian Institute of Agriculture, University of Tasmania, Hobart 7005, Australia
| | - Duncan Rouch
- Clarendon Policy and Strategy Group, Melbourne 3000, Australia
| | - John P Bowman
- Food Safety and Innovation Centre, Tasmanian Institute of Agriculture, University of Tasmania, Hobart 7005, Australia
| | - Richard Wilson
- Central Science Laboratory, University of Tasmania, Hobart 7005, Australia
| | - Anthony L Baker
- Food Safety and Innovation Centre, Tasmanian Institute of Agriculture, University of Tasmania, Hobart 7005, Australia
| | - Margaret L Britz
- Food Safety and Innovation Centre, Tasmanian Institute of Agriculture, University of Tasmania, Hobart 7005, Australia
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6
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Metabolic profiling of probiotic low-sodium prato cheese with flavour enhancers: Usefulness of NMR spectroscopy and chemometric tools. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2021.104992] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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7
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Mojaddar Langroodi A, Mehdizadeh T, Majidi L, Neyriz‐Naghadehi M. Lactobacillus acidophilus
and
Anethum graveolens
essential oil in Iranian cheese against
Escherichia coli
O157:H7. FLAVOUR FRAG J 2020. [DOI: 10.1002/ffj.3629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ali Mojaddar Langroodi
- Department of Food Hygiene and Quality Control Faculty of Veterinary Medicine Urmia University Urmia Iran
| | - Tooraj Mehdizadeh
- Department of Food Hygiene and Quality Control Faculty of Veterinary Medicine Urmia University Urmia Iran
| | - Lalezar Majidi
- Department of Biology Science Faculty of Islamic Azad University Urmia Iran
| | - Moslem Neyriz‐Naghadehi
- Department of Food Hygiene and Quality Control Veterinary Faculty of Islamic Azad University Urmia Iran
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Jia Q, Xu O, Wang J, Dong J, Ren X, Jia X, Shan C. Effects of GPR81 silencing combined with cisplatin stimulation on biological function in hypopharyngeal squamous cell carcinoma. Mol Med Rep 2020; 22:1727-1736. [PMID: 32582969 PMCID: PMC7411294 DOI: 10.3892/mmr.2020.11255] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 04/15/2020] [Indexed: 12/21/2022] Open
Abstract
Hypopharyngeal squamous cell carcinoma (HSCC) is a malignant tumor found in the head and neck region. Lactate receptor 1, also known as G protein‑coupled receptor81 (GPR81), has been reported to play a vital role in cancer growth and metabolism. However, the function of GPR81 in HSCC remains largely unknown. The present study investigated the effect of GPR81 on cell survival and GPR81‑mediated energy metabolism under cisplatin treatment in HSCC. GPR81 knockdown reduced the proliferation and invasion of the human HSCC cell line FaDu. Furthermore, GPR81 silencing combined with cisplatin treatment increased the expression of translocase of outer mitochondrial membrane 20 at the mRNA and protein levels (P<0.05). mRNA and protein expression of phosphofructokinase 1 in mRNA appeared to be downregulated in GPR81 knockdown FaDu cells treated with cisplatin, although this was not statistically significant. GPR81 silencing and cisplatin challenge showed no significant upregulation compared with the control, but significant downregulation in mRNA and protein levels compared with the shRNA‑scramble group. Apoptosis was measured by flow cytometry with annexin V and 7‑aminoactinomycin D. GPR81 silencing and cisplatin led to an increased apoptotic rate. Moreover, absence of GPR81 combined with cisplatin exposure increased caspase‑3 expression and decreased Bcl‑2 levels. The results of the present study suggested that GPR81 and cisplatin sensitivity played an important role in HSCC growth and metabolism.
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Affiliation(s)
- Qiaojing Jia
- E.N.T. Department, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Ou Xu
- E.N.T. Department, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Jianxing Wang
- E.N.T. Department, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Jinhui Dong
- E.N.T. Department, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Xiumin Ren
- E.N.T. Department, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Xiaofang Jia
- E.N.T. Department, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
| | - Chunguang Shan
- E.N.T. Department, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
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9
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Teleky BE, Martău AG, Ranga F, Chețan F, Vodnar DC. Exploitation of Lactic Acid Bacteria and Baker's Yeast as Single or Multiple Starter Cultures of Wheat Flour Dough Enriched with Soy Flour. Biomolecules 2020; 10:E778. [PMID: 32443391 PMCID: PMC7277752 DOI: 10.3390/biom10050778] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 02/07/2023] Open
Abstract
Sourdough fermentation presents several advantageous effects in bread making, like improved nutritional quality and increased shelf life. Three types of experiments aimed to evaluate comparatively the efficiency of two Lactobacillus (Lb.) strains, Lb. plantarum ATCC 8014 and Lb. casei ATCC 393, to metabolize different white wheat flour and soybeans flour combinations to compare their efficiency, together with/without Saccharomyces cerevisiae on sourdough fermentation. For this purpose, the viability, pH, organic acids, and secondary metabolites production were investigated, together with the dynamic rheological properties of the sourdough. During sourdough fermentation, LAB presented higher growth, and the pH decreased significantly from above pH 6 at 0 h to values under 4 at 24 h for each experiment. Co-cultures of LAB and yeast produced a higher quantity of lactic acid than single cultures, especially in sourdough enriched with soy-flour. In general, sourdoughs displayed a stable, elastic-like behavior, and the incorporation of soy-flour conferred higher elasticity in comparison with sourdoughs without soy-flour. The higher elasticity of sourdoughs enriched with soy-flour can be attributed to the fact that through frozen storage, soy proteins have better water holding capacity. In conclusion, sourdough supplemented with 10% soy-flour had better rheological properties, increased lactic, acetic, and citric acid production.
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Affiliation(s)
- Bernadette-Emőke Teleky
- Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăștur 3-5, 400372 Cluj-Napoca, Romania; (B.-E.T.); (A.G.M.)
| | - Adrian Gheorghe Martău
- Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăștur 3-5, 400372 Cluj-Napoca, Romania; (B.-E.T.); (A.G.M.)
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăștur 3-5, 400372 Cluj-Napoca, Romania;
| | - Floricuța Ranga
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăștur 3-5, 400372 Cluj-Napoca, Romania;
| | - Felicia Chețan
- Agricultural Research and Development Station Turda, str. Agriculturii, nr. 27, Turda, 401100 Jud. Cluj, Romania;
| | - Dan C. Vodnar
- Institute of Life Sciences, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăștur 3-5, 400372 Cluj-Napoca, Romania; (B.-E.T.); (A.G.M.)
- Faculty of Food Science and Technology, University of Agricultural Sciences and Veterinary Medicine, Calea Mănăștur 3-5, 400372 Cluj-Napoca, Romania;
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10
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Metabolomic profiling of oxalate-degrading probiotic Lactobacillus acidophilus and Lactobacillus gasseri. PLoS One 2019; 14:e0222393. [PMID: 31545840 PMCID: PMC6756784 DOI: 10.1371/journal.pone.0222393] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 08/28/2019] [Indexed: 12/12/2022] Open
Abstract
Oxalate, a ubiquitous compound in many plant-based foods, is absorbed through the intestine and precipitates with calcium in the kidneys to form stones. Over 80% of diagnosed kidney stones are found to be calcium oxalate. People who form these stones often experience a high rate of recurrence and treatment options remain limited despite decades of dedicated research. Recently, the intestinal microbiome has become a new focus for novel therapies. Studies have shown that select species of Lactobacillus, the most commonly included genus in modern probiotic supplements, can degrade oxalate in vitro and even decrease urinary oxalate in animal models of Primary Hyperoxaluria. Although the purported health benefits of Lactobacillus probiotics vary significantly between species, there is supporting evidence for their potential use as probiotics for oxalate diseases. Defining the unique metabolic properties of Lactobacillus is essential to define how these bacteria interact with the host intestine and influence overall health. We addressed this need by characterizing and comparing the metabolome and lipidome of the oxalate-degrading Lactobacillus acidophilus and Lactobacillus gasseri using ultra-high-performance liquid chromatography-high resolution mass spectrometry. We report many species-specific differences in the metabolic profiles of these Lactobacillus species and discuss potential probiotic relevance and function resulting from their differential expression. Also described is our validation of the oxalate-degrading ability of Lactobacillus acidophilus and Lactobacillus gasseri, even in the presence of other preferred carbon sources, measuring in vitro 14C-oxalate consumption via liquid scintillation counting.
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Mehdizadeh T, Narimani R, Mojaddar Langroodi A, Moghaddas Kia E, Neyriz-Naghadehi M. Antimicrobial effects ofZataria multifloraessential oil andLactobacillus acidophilusonEscherichia coliO157 stability in the Iranian probiotic white-brined cheese. J Food Saf 2018. [DOI: 10.1111/jfs.12476] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Tooraj Mehdizadeh
- Department of Food Hygiene and Quality Control; Faculty of Veterinary Medicine, Urmia University; Urmia I.R. Iran
| | - Rogaye Narimani
- Department of Biology, Science Faculty of Islamic Azad University; Urmia Branch; Urmia Iran
| | - Ali Mojaddar Langroodi
- Department of Food Hygiene and Quality Control; Faculty of Veterinary Medicine, Urmia University; Urmia I.R. Iran
| | - Ehsan Moghaddas Kia
- Food Science and Technology; Maragheh University of Medical Sciences; Maragheh I.R. Iran
| | - Moslem Neyriz-Naghadehi
- Department of Food Hygiene and Quality Control, Veterinary Faculty of Islamic Azad University; Urmia Branch; Urmia Iran
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12
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Berman CM, Merritt RJ. Stoned-A Syndrome of D-Lactic Acidosis and Urolithiasis. Nutr Clin Pract 2018; 33:897-901. [DOI: 10.1002/ncp.10063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Affiliation(s)
- Casey M. Berman
- New York Presbyterian-Columbia University; New York New York USA
| | - Russell J. Merritt
- Children's Hospital Los Angeles; Keck School of Medicine; University of Southern California; Los Angeles California USA
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13
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Lo R, Ho VTT, Bansal N, Turner MS. The genetic basis underlying variation in production of the flavour compound diacetyl by Lactobacillus rhamnosus strains in milk. Int J Food Microbiol 2018; 265:30-39. [DOI: 10.1016/j.ijfoodmicro.2017.10.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 08/01/2017] [Accepted: 10/28/2017] [Indexed: 01/16/2023]
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14
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The individual contribution of starter and non-starter lactic acid bacteria to the volatile organic compound composition of Caciocavallo Palermitano cheese. Int J Food Microbiol 2017; 259:35-42. [PMID: 28783535 DOI: 10.1016/j.ijfoodmicro.2017.07.022] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 06/29/2017] [Accepted: 07/30/2017] [Indexed: 11/21/2022]
Abstract
The contribution of two starter (Lactobacillus delbrueckii and Streptococcus thermophilus) and nine non-starter (Enterococcus casselliflavus, Enterococcus faecalis, Enterococcus durans, Enterococcus gallinarum, Lactobacillus casei, Lactobacillus paracasei, Lactobacillus rhamnosus, Pediococcus acidilactici and Pediococcus pentosaceus) species of lactic acid bacteria (LAB) to the volatile organic compounds (VOCs) of Caciocavallo Palermitano cheese was investigated. The strains used in this study were isolated during the production/ripening of the stretched cheese and tested in a cheese-based medium (CBM). The fermented substrates were analyzed for the growth of the single strains and subjected to the head space solid phase micro-extraction (HS-SPME) and gas chromatography - mass spectrometry (GC-MS). The 11 strains tested were all able to increase their numbers in CBM, even though the development of the starter LAB was quite limited. GC-MS analysis registered 43 compounds including seven chemical classes. A lower diversity of VOCs was registered for the unfermented curd based medium (CuBM) analyzed for comparison. The class of ketones represented a consistent percentage of the VOCs for almost all LAB, followed by alcohols and esters. The volatile profile of Pediococcus acidilactici and Lactobacillus delbrueckii was mainly characterized by 2-butanol, butanoic acid and hexanoic acid and their esters, while that of Lactobacillus casei and Lactobacillus rhamnosus was characterized by 2,3-butanedione and 2-butanone, 3-hydroxy. In order to correlate the VOCs produced by Caciocavallo Palermitano cheeses with those generated by individual LAB, the 4-month ripened cheeses resulting from the dairy process monitored during the isolation of LAB were also analyzed for the volatile chemical fraction and the compounds in common were subjected to a multivariate statistical analysis. The canonical analysis indicated that the VOCs of the ripened cheeses were mainly influenced by E. gallinarum, L. paracasei, L. delbrueckii, L. rhamnosus and L. casei and that 1-hexanol, o-xylene and m-xylene were the cheese VOCs highly correlated with LAB.
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15
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Peralta GH, Bergamini CV, Audero G, Páez R, Wolf IV, Perotti MC, Hynes ER. Spray-dried adjunct cultures of autochthonous non-starter lactic acid bacteria. Int J Food Microbiol 2017; 255:17-24. [PMID: 28558330 DOI: 10.1016/j.ijfoodmicro.2017.05.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Revised: 04/03/2017] [Accepted: 05/21/2017] [Indexed: 10/19/2022]
Abstract
Spray-drying of lactic cultures provides direct-to-vat starters, which facilitate their commercialization and use. However, this process may alter the metabolic activity and deteriorate technological features. In this work, we assessed the influence of spray-drying on the survival and aroma production of two strains of mesophilic lactobacilli: Lactobacillus paracasei 90 and Lactobacillus plantarum 91, which have already been characterized as good adjunct cultures. The spray-drying was carried out using a laboratory scale spray and the dried cultures were monitored during the storage for the survival rate. The dried cultures were applied to two cheese models: sterile cheese extract and miniature soft cheese. The influence on the carbohydrate metabolism and the production of organic acids and volatile compounds was determined. Both strains retained high levels of viable counts in the powder after drying and during the storage at 5°C for twelve months. In addition, they also remained at high level in both cheese models during incubation or ripening. Similar profiles of carbohydrate fermentation and bioformation of volatile compounds were observed in the cheese extracts for each of the strains when tested as both fresh and dried cultures. In addition, the ability of Lb. paracasei 90 to increase the production of acetoin and diacetyl remarkably in cheese models was also confirmed for the spray-dried culture.
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Affiliation(s)
- Guillermo H Peralta
- Instituto de Lactología Industrial, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina.
| | - Carina V Bergamini
- Instituto de Lactología Industrial, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina; Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000 Santa Fe, Argentina
| | - Gabriela Audero
- Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria, Ruta 34 km 227, Santa Fe, Argentina
| | - Roxana Páez
- Estación Experimental Agropecuaria Rafaela, Instituto Nacional de Tecnología Agropecuaria, Ruta 34 km 227, Santa Fe, Argentina
| | - I Verónica Wolf
- Instituto de Lactología Industrial, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina; Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000 Santa Fe, Argentina
| | - M Cristina Perotti
- Instituto de Lactología Industrial, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina; Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000 Santa Fe, Argentina
| | - Erica R Hynes
- Instituto de Lactología Industrial, Universidad Nacional del Litoral, Consejo Nacional de Investigaciones Científicas y Técnicas, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina; Facultad de Ingeniería Química, Universidad Nacional del Litoral, Santiago del Estero 2829, 3000 Santa Fe, Argentina
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16
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Oliveira LC, Saraiva TDL, Silva WM, Pereira UP, Campos BC, Benevides LJ, Rocha FS, Figueiredo HCP, Azevedo V, Soares SC. Analyses of the probiotic property and stress resistance-related genes of Lactococcus lactis subsp. lactis NCDO 2118 through comparative genomics and in vitro assays. PLoS One 2017; 12:e0175116. [PMID: 28384209 PMCID: PMC5383145 DOI: 10.1371/journal.pone.0175116] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 03/21/2017] [Indexed: 11/19/2022] Open
Abstract
Lactococcus lactis subsp. lactis NCDO 2118 was recently reported to alleviate colitis symptoms via its anti-inflammatory and immunomodulatory activities, which are exerted by exported proteins that are not produced by L. lactis subsp. lactis IL1403. Here, we used in vitro and in silico approaches to characterize the genomic structure, the safety aspects, and the immunomodulatory activity of this strain. Through comparative genomics, we identified genomic islands, phage regions, bile salt and acid stress resistance genes, bacteriocins, adhesion-related and antibiotic resistance genes, and genes encoding proteins that are putatively secreted, expressed in vitro and absent from IL1403. The high degree of similarity between all Lactococcus suggests that the Symbiotic Islands commonly shared by both NCDO 2118 and KF147 may be responsible for their close relationship and their adaptation to plants. The predicted bacteriocins may play an important role against the invasion of competing strains. The genes related to the acid and bile salt stresses may play important roles in gastrointestinal tract survival, whereas the adhesion proteins are important for persistence in the gut, culminating in the competitive exclusion of other bacteria. Finally, the five secreted and expressed proteins may be important targets for studies of new anti-inflammatory and immunomodulatory proteins. Altogether, the analyses performed here highlight the potential use of this strain as a target for the future development of probiotic foods.
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Affiliation(s)
- Letícia C. Oliveira
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
| | - Tessália D. L. Saraiva
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
| | - Wanderson M. Silva
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
| | - Ulisses P. Pereira
- Department of Preventive Veterinary Medicine, State University of Londrina, Londrina—PR, Brazil
| | - Bruno C. Campos
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
| | - Leandro J. Benevides
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
| | - Flávia S. Rocha
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
| | - Henrique C. P. Figueiredo
- Official Laboratory of Fisheries Ministry—Veterinary School, Federal University of Minas Gerais, Belo Horizonte, MG, Brazil
| | - Vasco Azevedo
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
| | - Siomar C. Soares
- Laboratory of Cellular and Molecular Genetics, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte—MG, Brazil
- Department of Microbiology, Immunology and Parasitology, Institute of Biological and Natural Sciences, Federal University of Triângulo Mineiro, Uberaba—MG, Brazil
- * E-mail:
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17
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Zuljan FA, Mortera P, Alarcón SH, Blancato VS, Espariz M, Magni C. Lactic acid bacteria decarboxylation reactions in cheese. Int Dairy J 2016. [DOI: 10.1016/j.idairyj.2016.07.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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18
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Reconstruction and analysis of the genome-scale metabolic model of Lactobacillus casei LC2W. Gene 2015; 554:140-7. [DOI: 10.1016/j.gene.2014.10.034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2014] [Revised: 10/04/2014] [Accepted: 10/21/2014] [Indexed: 11/18/2022]
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19
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Oh JH, Vinay-Lara E, McMinn R, Glass KA, Johnson ME, Steele JL. Evaluation of NaCl, pH, and lactic acid on the growth of Shiga toxin-producing Escherichia coli in a liquid Cheddar cheese extract. J Dairy Sci 2014; 97:6671-9. [DOI: 10.3168/jds.2014-7946] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 07/24/2014] [Indexed: 11/19/2022]
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20
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Lee FJ, Rusch DB, Stewart FJ, Mattila HR, Newton ILG. Saccharide breakdown and fermentation by the honey bee gut microbiome. Environ Microbiol 2014; 17:796-815. [PMID: 24905222 DOI: 10.1111/1462-2920.12526] [Citation(s) in RCA: 158] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 05/23/2014] [Accepted: 05/23/2014] [Indexed: 11/30/2022]
Abstract
The honey bee, the world's most important agricultural pollinator, relies exclusively on plant-derived foods for nutrition. Nectar and pollen collected by honey bees are processed and matured within the nest through the activities of honey bee-derived microbes and enzymes. In order to better understand the contribution of the microbial community to food processing in the honey bee, we generated a metatranscriptome of the honey bee gut microbiome. The function of the microbial community in the honey bee, as revealed by metatranscriptome sequencing, resembles that of other animal guts and food-processing environments. We identified three major bacterial classes that are active in the gut (γ-Proteobacteria, Bacilli and Actinobacteria), all of which are predicted to participate in the breakdown of complex macromolecules (e.g. polysaccharides and polypeptides), the fermentation of component parts of these macromolecules, and the generation of various fermentation products, such as short-chain fatty acids and alcohol. The ability of the microbial community to metabolize these carbon-rich food sources was confirmed through the use of community-level physiological profiling. Collectively, these findings suggest that the gut microflora of the honey bee harbours bacterial members with unique roles, which ultimately can contribute to the processing of plant-derived food for colonies.
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Affiliation(s)
- Fredrick J Lee
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA
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21
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Sgarbi E, Bottari B, Gatti M, Neviani E. Investigation of the ability of dairy nonstarter lactic acid bacteria to grow using cell lysates of other lactic acid bacteria as the exclusive source of nutrients. INT J DAIRY TECHNOL 2014. [DOI: 10.1111/1471-0307.12132] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Elisa Sgarbi
- Department of Food Science; University of Parma; Parco Area delle Scienze 48A 43124 Parma Italy
| | - Benedetta Bottari
- Department of Food Science; University of Parma; Parco Area delle Scienze 48A 43124 Parma Italy
| | - Monica Gatti
- Department of Food Science; University of Parma; Parco Area delle Scienze 48A 43124 Parma Italy
| | - Erasmo Neviani
- Department of Food Science; University of Parma; Parco Area delle Scienze 48A 43124 Parma Italy
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22
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The Microfloras and Sensory Profiles of Selected Protected Designation of Origin Italian Cheeses. Microbiol Spectr 2014; 2:CM-0007-2012. [PMID: 26082116 DOI: 10.1128/microbiolspec.cm-0007-2012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Approximately 39 Italian cheeses carry protected designation of origin (PDO) status. These cheeses differ in their manufacturing technology and the microbial flora which comprise the finished products. The evolution of lactic microflora in cheeses with PDO status is of particular interest because the biochemical activities of these organisms participate in cheesemaking and may play an acknowledged role in the development of organoleptic characteristics during ripening. Nonstarter lactic acid bacteria (NSLAB) constitute complex microbial associations that are characterized by the occurrence of various species and many biotypes as a result of a number of selective conditions persisting during the manufacturing process and different ecological niches. The evolution of different species during ripening of Fiore Sardo showed that, when present, Lactobacillus paracasei persists and dominates the microflora of the cheese in the last period of ripening, suggesting that this species, more resistant to the constraints of the mature cheese, could be involved in proteolysis and in other enzymatic processes occurring during cheese ripening. In contrast, the stretching step typical of pasta filata cheese, such as Ragusano, induced a simplification of the raw milk profiles, allowing the persistence only of some predominant species, such as Streptococcus thermophilus, Lactobacillus delbrueckii subsp. lactis, Lactococcus lactis, and Streptococcus macedonicus, after the stretching step. Lactobacillus plantarum and L. paracasei were isolated from ripened Castelmagno PDO cheese samples with the highest frequencies. These species, generally absent in the milk, occur in dairy ecosystems and dominate the bacterial flora of many ripened semihard cheeses. In PDO long-ripened Italian cheese such as Parmigiano Reggiano, the NSLAB population is mainly formed by L. paracasei, Lactobacillus rhamnosus, and Pediococcus acidilactici. Lactobacillus helveticus, L. delbrueckii subsp. lactis, and L. delbrueckii subsp. bulgaricus were also detected. Continued insight into the microbial populations of traditional Italian cheeses will allow continued production of characteristic, high-quality cheeses which have been enjoyed for many centuries.
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23
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Pedersen T, Ristagno D, McSweeney P, Vogensen F, Ardö Y. Potential impact on cheese flavour of heterofermentative bacteria from starter cultures. Int Dairy J 2013. [DOI: 10.1016/j.idairyj.2013.03.003] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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24
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Al-Naseri A, Bowman JP, Wilson R, Nilsson RE, Britz ML. Impact of Lactose Starvation on the Physiology of Lactobacillus casei GCRL163 in the Presence or Absence of Tween 80. J Proteome Res 2013; 12:5313-22. [DOI: 10.1021/pr400661g] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ali Al-Naseri
- Food
Safety Centre, Tasmanian Institute of Agricultural Research, School
of Agricultural Science, University of Tasmania, Private Bag 54, Hobart, Tasmania 7001, Australia
| | - John P. Bowman
- Food
Safety Centre, Tasmanian Institute of Agricultural Research, School
of Agricultural Science, University of Tasmania, Private Bag 54, Hobart, Tasmania 7001, Australia
| | - Richard Wilson
- Central
Science Laboratory, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Rolf E. Nilsson
- Food
Safety Centre, Tasmanian Institute of Agricultural Research, School
of Agricultural Science, University of Tasmania, Private Bag 54, Hobart, Tasmania 7001, Australia
| | - Margaret L. Britz
- Food
Safety Centre, Tasmanian Institute of Agricultural Research, School
of Agricultural Science, University of Tasmania, Private Bag 54, Hobart, Tasmania 7001, Australia
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25
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Ca2+-citrate uptake and metabolism in Lactobacillus casei ATCC 334. Appl Environ Microbiol 2013; 79:4603-12. [PMID: 23709502 DOI: 10.1128/aem.00925-13] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The putative citrate metabolic pathway in Lactobacillus casei ATCC 334 consists of the transporter CitH, a proton symporter of the citrate-divalent metal ion family of transporters CitMHS, citrate lyase, and the membrane-bound oxaloacetate decarboxylase complex OAD-ABDH. Resting cells of Lactobacillus casei ATCC 334 metabolized citrate in complex with Ca(2+) and not as free citrate or the Mg(2+)-citrate complex, thereby identifying Ca(2+)-citrate as the substrate of the transporter CitH. The pathway was induced in the presence of Ca(2+) and citrate during growth and repressed by the presence of glucose and of galactose, most likely by a carbon catabolite repression mechanism. The end products of Ca(2+)-citrate metabolism by resting cells of Lb. casei were pyruvate, acetate, and acetoin, demonstrating the activity of the membrane-bound oxaloacetate decarboxylase complex OAD-ABDH. Following pyruvate, the pathway splits into two branches. One branch is the classical citrate fermentation pathway producing acetoin by α-acetolactate synthase and α-acetolactate decarboxylase. The other branch yields acetate, for which the route is still obscure. Ca(2+)-citrate metabolism in a modified MRS medium lacking a carbohydrate did not significantly affect the growth characteristics, and generation of metabolic energy in the form of proton motive force (PMF) was not observed in resting cells. In contrast, carbohydrate/Ca(2+)-citrate cometabolism resulted in a higher biomass yield in batch culture. However, also with these cells, no generation of PMF was associated with Ca(2+)-citrate metabolism. It is concluded that citrate metabolism in Lb. casei is beneficial when it counteracts acidification by carbohydrate metabolism in later growth stages.
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26
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Fermentation of coconut water by probiotic strains Lactobacillus acidophilus L10 and Lactobacillus casei L26. ANN MICROBIOL 2013. [DOI: 10.1007/s13213-013-0607-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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27
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Tan W, Budinich M, Ward R, Broadbent J, Steele J. Optimal growth of Lactobacillus casei in a Cheddar cheese ripening model system requires exogenous fatty acids. J Dairy Sci 2012; 95:1680-9. [DOI: 10.3168/jds.2011-4847] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Accepted: 12/26/2011] [Indexed: 11/19/2022]
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28
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Budinich M, Perez-Díaz I, Cai H, Rankin S, Broadbent J, Steele J. Growth of Lactobacillus paracasei ATCC 334 in a cheese model system: A biochemical approach. J Dairy Sci 2011; 94:5263-77. [DOI: 10.3168/jds.2009-2512] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Accepted: 07/01/2011] [Indexed: 11/19/2022]
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29
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Lin WH, Wu CR, Fang TJ, Guo JT, Huang SY, Lee MS, Yang HL. Anti-Helicobacter pylori activity of fermented milk with lactic acid bacteria. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2011; 91:1424-1431. [PMID: 21445876 DOI: 10.1002/jsfa.4327] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2010] [Revised: 12/29/2010] [Accepted: 01/10/2011] [Indexed: 05/30/2023]
Abstract
BACKGROUND Ten strains of lactic acid bacteria (LAB) were investigated for their anti-Helicobacter pylori effects. The bactericidal activity and organic acid content in spent culture supernatants (SCS) from fermented milk were measured. In addition, the exclusion effect of SCS against H. pylori infection of human gastric epithelial AGS cells was assayed. RESULTS Three LAB strains, LY1, LY5 and IF22, showed better anti-Helicobacter effects than the other strains. There were no significant differences in the bactericidal activity of LAB strains between original SCS, artificial SCS and SCS treated by heating or protease digestion. However, neutralised SCS lost this activity. These results suggest that the anti-H. pylori activity of SCS may be related to the concentration of organic acids and the pH value but not to protein components. In the AGS cell culture test, both fermented LY5-SCS and artificial LY5-SCS significantly reduced H. pylori infection and urease activity (P < 0.05). CONCLUSION In this study, in vitro methods were used to screen potential probiotics with anti-H. pylori activity. This may provide an excellent and rapid system for studying probiotics in the functional food and dairy industries.
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Affiliation(s)
- Wen-Hsin Lin
- School of Pharmacy, China Medical University, No. 91, Hsueh Shih Road, Taichung City 404, Taiwan
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30
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Milesi MM, Wolf IV, Bergamini CV, Hynes ER. Two strains of nonstarter lactobacilli increased the production of flavor compounds in soft cheeses. J Dairy Sci 2011; 93:5020-31. [PMID: 20965316 DOI: 10.3168/jds.2009-3043] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2009] [Accepted: 07/25/2010] [Indexed: 11/19/2022]
Abstract
The contribution to flavor generation and secondary proteolysis of 2 strains of mesophilic lactobacilli isolated from cheese was studied. Miniature soft cheeses (200 g) were produced with or without the inclusion of a culture of Lactobacillus plantarum I91 or Lactobacillus casei I90 in the starter composed of Streptococcus thermophilus. During ripening, cheeses containing the added lactobacilli showed an increased content of total free amino acids, but this increase was only significant in cheeses with Lb. plantarum I91. In addition, free amino acid profiles were modified by selective increases of some amino acids, such as Asp, Ser, Arg, Leu, and Phe. Cheeses inoculated with Lb. plantarum I91 or Lb. casei I90 were also characterized by a significantly higher concentration of diacetyl, a key flavor compound, and an increased content of acetoin. Results suggest an increase in the catabolism of either citrate or aspartate, with the production of the derived aroma compounds. Overall, aspartate content increased in both lactobacilli-added cheeses, whereas citrate was more or less constant, suggesting that aspartate could be the source of increased diacetyl and acetoin. A triangle aroma test showed that the addition of the lactobacilli strains significantly changed the sensory attributes of cheeses. At least 11 of 12 panelists commented that the aroma of cheeses with adjuncts was more buttery than that of control cheeses, which is desirable in most soft cheeses. Both Lb. plantarum I91 and Lb. casei I90 performed well as adjunct cultures by influencing cheese aroma development and cheese proteolysis.
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Affiliation(s)
- M M Milesi
- Instituto de Lactología Industrial, Universidad Nacional del Litoral-Consejo Nacional de Investigaciones Científicas y Técnicas, Santa Fe, Argentina
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31
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De Angelis M, Calasso M, Di Cagno R, Siragusa S, Minervini F, Gobbetti M. NADP-glutamate dehydrogenase activity in nonstarter lactic acid bacteria: effects of temperature, pH and NaCl on enzyme activity and expression. J Appl Microbiol 2010; 109:1763-74. [PMID: 20662973 DOI: 10.1111/j.1365-2672.2010.04804.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS To screen the glutamate dehydrogenase (GDH) activity of nonstarter lactic acid bacteria (NSLAB) and to determine the effects of temperature, pH and NaCl values used for cheese ripening on enzyme activity and expression of GDH gene. METHODS AND RESULTS A subcellular fractionation protocol and specific enzyme assays were used. The effect of temperature, pH and NaCl on enzyme activity was evaluated. The expression of GDH gene was monitored by real-time PCR. One selected strain was also used as adjunct starter for cheese making to evaluate the catabolism of free amino acids and the production of volatile organic compounds (VOC) during cheese ripening. The cytoplasm fraction of all strains showed in vitro NADP-dependent GDH activity. NADP-GDH activity was markedly strain dependent and varied according to the interactions between temperature, pH and NaCl. Lactobacillus plantarum DPPMA49 showed the highest NADP-GDH activity under temperature, pH and NaCl values found during cheese ripening. RT-PCR analysis revealed that GDH expression of Lact. plantarum DPPMA49 was down-expressed by low temperature (<13°C) and over-expressed by NaCl (1·87-5·62%). According to NADP-GDH activity, the highest level of VOC (alcohols, aldehydes, miscellaneous and carboxylic acids) was found in cheeses made with DPPMA49. CONCLUSIONS The results of this study may be considered as an example of the influence of temperature, pH and NaCl on enzyme activity and expression of functional genes, such as GDH, in cheese-related bacteria. SIGNIFICANCE AND IMPACT OF THE STUDY It focuses on the phenotypic and molecular characterization of the NADP-GDH in lactobacilli under cheese-ripening conditions. The findings of this study contribute to the knowledge about enzymes involved in the catabolism of amino acids, to be used as an important selection trait for cheese strains.
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Affiliation(s)
- M De Angelis
- Dipartimento di Protezione delle Piante e Microbiologia Applicata, Università degli Studi di Bari, Bari, Italy.
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32
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Lin WH, Lin CK, Sheu SJ, Hwang CF, Ye WT, Hwang WZ, Tsen HY. Antagonistic Activity of Spent Culture Supernatants of Lactic Acid Bacteria against Helicobacter Pylori Growth and Infection in Human Gastric Epithelial AGS Cells. J Food Sci 2009; 74:M225-30. [DOI: 10.1111/j.1750-3841.2009.01194.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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33
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Recovery and differentiation of long ripened cheese microflora through a new cheese-based cultural medium. Food Microbiol 2009; 26:240-5. [PMID: 19269563 DOI: 10.1016/j.fm.2009.01.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 01/12/2009] [Indexed: 11/20/2022]
Abstract
A partial picture of the typical microflora of PDO Parmigiano Reggiano cheese was achieved by studying the cultivability of lactic acid bacteria associated with its manufacturing and ripening. A comprehensive sampling design allowed for the analysis of the cheese microflora during its production over 20 months of ripening. An innovative cheese agar medium (CAM) was prepared after testing 18 formulations all based on grated Parmigiano Reggiano ripened cheese. During cheese manufacturing and ripening, different samples were sampled and their microflora was recovered using CAM in comparison with other traditional media. Colonies which formed units from the different agar media tested were picked and isolated; the phylogenetic positions of 154 isolated strains were studied at level of species by 16S-rRNA gene sequencing. CAM seems to be able to recover the minority population coming from milk and whey starter, hardly estimable, during the first hours of production, on traditional media.
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34
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Affiliation(s)
- Roland J Siezen
- Kluyver Centre for Genomics of Industrial Fermentation, TI Food and Nutrition, Wageningen, The Netherlands.
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35
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Pfeiler EA, Klaenhammer TR. The genomics of lactic acid bacteria. Trends Microbiol 2007; 15:546-53. [DOI: 10.1016/j.tim.2007.09.010] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Revised: 09/14/2007] [Accepted: 09/14/2007] [Indexed: 12/21/2022]
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36
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Díaz-Muñiz I, Steele JL. Conditions required for citrate utilization during growth of Lactobacillus casei ATCC334 in chemically defined medium and Cheddar Cheese extract. Antonie van Leeuwenhoek 2006; 90:233-43. [PMID: 16841145 DOI: 10.1007/s10482-006-9078-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2005] [Accepted: 04/11/2006] [Indexed: 11/24/2022]
Abstract
Conditions required for citrate utilization by Lactobacillus casei ATCC334 were identified. Citrate was utilized by this microorganism in modified Chemically Defined Media (mCDM) as an energy source, solely in the presence of limiting concentrations of galactose. The presence of glucose inhibited citrate utilization by this microorganism even when added in limiting concentrations. Utilization of citrate occurred at pH 6.0 +/- 0.2 and 5.1 +/- 0.2. Together these observations suggest that citrate is an energy source for L. casei in ripening cheese only when the residual levels of carbohydrate post-fermentation are limiting (<2.5 mM), and lactose or glucose are absent. However, citrate utilization by this organism was observed in Cheddar cheese extract (CCE), which naturally contains both lactose and galactose, at the beginning of late-logarithmic phase and regardless of the galactose concentration present in the media.
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Affiliation(s)
- Ilenys Díaz-Muñiz
- Microbiology Doctoral Training Program, University of Wisconsin-Madison, 1605 Linden Drive, Madison, Wisconsin 53706, USA
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