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Bevilacqua A, Speranza B, Campaniello D, Racioppo A, Accettulli A, De Santis A, Sinigaglia M, Rosaria Corbo M. Effect of ultrasound-attenuation on technological and functional properties of two strains of Lactiplantibacillus plantarum isolated from table olives. ULTRASONICS SONOCHEMISTRY 2024; 110:107057. [PMID: 39236443 PMCID: PMC11404055 DOI: 10.1016/j.ultsonch.2024.107057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2024] [Revised: 08/28/2024] [Accepted: 08/31/2024] [Indexed: 09/07/2024]
Abstract
While probiotics have a wide range of beneficial properties, they can also negatively affect the taste or aroma of foods products by resulting in the phenomenon of post-acidification. Ultrasound (US) is a tool to modulate the metabolism of probiotic bacteria, counteracting post-acidification and improving the performance and functional properties of microorganisms without affecting their viability. The purpose of this paper was to evaluate the effect of 10 different combinations of power (20 and 40 %) and duration (2, 4, 6, 8 and 10 min) of US treatment on two functional strains of Lactiplantibacillus plantarum (c16 and c19) isolated from table olives, with the aim of understanding how, some of the main functional and technological traits (viability, acidification, growth profile under different conditions, antibiotic resistance, viability at pH 2.0 and 0.3 % bile salts), were affected. It was found that the effects were strain dependent, and the best results were obtained for strain c19 in the combinations at 20 % for 8 and 10 min and 40 % for 2 min, where an improvement in functional characteristics was found, with some effects on biofilm stability, inhibition of acidification, without adverse results on some technological properties.
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Affiliation(s)
- Antonio Bevilacqua
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy
| | - Barbara Speranza
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy
| | - Daniela Campaniello
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy
| | - Angela Racioppo
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy
| | - Alessandra Accettulli
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy
| | - Alessandro De Santis
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy
| | - Milena Sinigaglia
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy
| | - Maria Rosaria Corbo
- Department of Agriculture, Food, Natural Resources and Engineering (DAFNE), University of Foggia, Foggia, Italy.
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2
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Xu X, Liu F, Qiao W, Dong Y, Yang H, Liu F, Xu H, Qiao M. A Point Mutation in Cassette Relieves the Repression Regulation of CcpA Resulting in an Increase in the Degradation of 2,3-Butanediol in Lactococcus lactis. Microorganisms 2024; 12:773. [PMID: 38674718 PMCID: PMC11051896 DOI: 10.3390/microorganisms12040773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
In lactic acid bacteria, the global transcriptional regulator CcpA regulates carbon metabolism by repressing and activating the central carbon metabolism pathway, thus decreasing or increasing the yield of certain metabolites to maximize carbon flow. However, there are no reports on the deregulation of the inhibitory effects of CcpA on the metabolism of secondary metabolites. In this study, we identified a single-base mutant strain of Lactococcus lactis N8-2 that is capable of metabolizing 2,3-butanediol. It has been established that CcpA dissociates from the catabolite responsive element (cre) site due to a mutation, leading to the activation of derepression and expression of the 2,3-butanediol dehydrogenase gene cluster (butB and butA). Transcriptome analysis and quantitative polymerase chain reaction (Q-PCR) results showed significant upregulation of transcription of butB and butA compared to the unmutated strain. Furthermore, micro-scale thermophoresis experiments confirmed that CcpA did not bind to the mutated cre. Furthermore, in a bacterial two-plasmid fluorescent hybridization system, it was similarly confirmed that the dissociation of CcpA from cre eliminated the repressive effect of CcpA on downstream genes. Finally, we investigated the differing catalytic capacities of the 2,3-butanediol dehydrogenase gene cluster in L. lactis N8-1 and L. lactis N8-2 for 2,3-butanediol. This led to increased expression of butB and butA, which were deregulated by CcpA repression. This is the first report on the elimination of the deterrent effect of CcpA in lactic acid bacteria, which changes the direction of enzymatic catalysis and alters the direction of carbon metabolism. This provides new perspectives and strategies for metabolizing 2,3-butanediol using bacteria in synthetic biology.
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Affiliation(s)
- Xian Xu
- School of Life Science, Shanxi University, Taiyuan 030006, China; (X.X.); (Y.D.); (H.Y.); (F.L.)
| | - Fulu Liu
- State Key Laboratory of Coordination Chemistry, Chemistry and Biomedicine Innovation Center, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China;
| | - Wanjin Qiao
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China; (W.Q.); (H.X.)
| | - Yujie Dong
- School of Life Science, Shanxi University, Taiyuan 030006, China; (X.X.); (Y.D.); (H.Y.); (F.L.)
| | - Huan Yang
- School of Life Science, Shanxi University, Taiyuan 030006, China; (X.X.); (Y.D.); (H.Y.); (F.L.)
| | - Fengming Liu
- School of Life Science, Shanxi University, Taiyuan 030006, China; (X.X.); (Y.D.); (H.Y.); (F.L.)
| | - Haijin Xu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China; (W.Q.); (H.X.)
| | - Mingqiang Qiao
- School of Life Science, Shanxi University, Taiyuan 030006, China; (X.X.); (Y.D.); (H.Y.); (F.L.)
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China; (W.Q.); (H.X.)
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3
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Arcidiacono S, Spangler JR, Litteral V, Doherty LA, Stamps B, Walper S, Goodson M, Soares JW. In Vitro Fermentation Evaluation of Engineered Sense and Respond Probiotics in Polymicrobial Communities. ACS Biomater Sci Eng 2023; 9:5176-5185. [PMID: 37642529 DOI: 10.1021/acsbiomaterials.3c00630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Synthetic biology provides a means of engineering tailored functions into probiotic bacteria. Of particular interest is introducing microbial sense and response functions; however, techniques for testing in physiologically relevant environments, such as those for the intended use, are still lacking. Typically, engineered probiotics are developed and tested in monoculture or in simplified cocultures still within ideal environments. In vitro fermentation models using simplified microbial communities now allow us to simulate engineered organism behavior, specifically organism persistence and intended functionality, within more physiologically relevant, tailored microbial communities. Here, probiotic bacteria Escherichia coli Nissle and Lactobacillus plantarum engineered with sense and response functionalities were evaluated for the ability to persist and function without adverse impact on commensal bacteria within simplified polymicrobial communities with increasing metabolic competition that simulate gut microbe community dynamics. Probiotic abundance and plasmid stability, measured by viability qPCR, decreased for engineered E. coli Nissle relative to monocultures as metabolic competition increased; functional output was not affected. For engineered L. plantarum, abundance and plasmid stability were not adversely impacted; however, functional output was decreased universally as metabolic competition was introduced. For both organisms, adverse effects on select commensals were not evident. Testing engineered probiotics in more physiologically relevant in vitro test beds can provide critical knowledge for circuit design feedback and functional validation prior to the transition to more costly and time-consuming higher-fidelity testing in animal or human studies.
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Affiliation(s)
- Steven Arcidiacono
- Soldier Effectiveness Directorate, US Army DEVCOM Soldier Center, Natick, Massachusetts 01760, United States
| | - Joseph R Spangler
- Center for Bio/Molecular Science & Engineering, US Naval Research Laboratory, Washington, D.C.20375, United States
| | - Vaughn Litteral
- UES Inc, US Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Laurel A Doherty
- Soldier Effectiveness Directorate, US Army DEVCOM Soldier Center, Natick, Massachusetts 01760, United States
| | - Blake Stamps
- 711th Human Performance Wing, US Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Scott Walper
- Center for Bio/Molecular Science & Engineering, US Naval Research Laboratory, Washington, D.C.20375, United States
| | - Michael Goodson
- 711th Human Performance Wing, US Air Force Research Laboratory, Wright-Patterson Air Force Base, Ohio 45433, United States
| | - Jason W Soares
- Soldier Effectiveness Directorate, US Army DEVCOM Soldier Center, Natick, Massachusetts 01760, United States
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Cui Y, Dong S, Qu X. New progress in the identifying regulatory factors of exopolysaccharide synthesis in lactic acid bacteria. World J Microbiol Biotechnol 2023; 39:301. [PMID: 37688654 DOI: 10.1007/s11274-023-03756-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Accepted: 09/06/2023] [Indexed: 09/11/2023]
Abstract
The exopolysaccharides (EPSs) of lactic acid bacteria (LAB) have presented various bioactivities and beneficial characteristics, rendering their vast commercial value and attracting a broad interest of researchers. The diversity of EPS structures contributes to the changes of EPS functions. However, the low yield of EPS of LAB has severely limited these biopolymers' comprehensive studies and applications in different areas, such as functional food, health and medicine fields. The clarification of biosynthesis mechanism of EPS will accelerate the synthesis and reconstruction of EPS. In recent years, with the development of new genetic manipulation techniques, there has been significant progress in the EPS biosynthesis mechanisms in LAB. In this review, the structure of LAB-derived EPSs, the EPS biosynthesis basic pathways in LAB, the EPS biosynthetic gene cluster, and the regulation mechanism of EPS biosynthesis will be summarized. It will focus on the latest progress in EPS biosynthesis regulation of LAB and provide prospects for future related developments.
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Affiliation(s)
- Yanhua Cui
- Department of Food Nutrition and Health, School of Medicine and Health, Harbin Institute of Technology, Harbin, 150001, China.
| | - Shiyuan Dong
- Department of Food Nutrition and Health, School of Medicine and Health, Harbin Institute of Technology, Harbin, 150001, China
| | - Xiaojun Qu
- Institute of Microbiology, Heilongjiang Academy of Sciences, Harbin, 150010, China
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Huang YY, Yao QB, Jia XZ, Chen BR, Abdul R, Wang LH, Zeng XA, Liu DM. Characterization and application in yogurt of genipin-crosslinked chitosan microcapsules encapsulating with Lactiplantibacillus plantarum DMDL 9010. Int J Biol Macromol 2023; 248:125871. [PMID: 37473896 DOI: 10.1016/j.ijbiomac.2023.125871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 07/13/2023] [Accepted: 07/15/2023] [Indexed: 07/22/2023]
Abstract
Microcapsules could improve the protection of probiotics in the lyophilization and gastrointestinal digestion process. The purpose of this study was to prepare Lactiplantibacillus plantarum DMDL 9010 (LP9010) microcapsules by cross-linking chitosan with genipin and to determine the encapsulation efficiency, morphological characterization, storage stability and the application of the microcapsules in fermentation. The results showed that the LP9010 microcapsules embedded in 1.00 wt% genipin cross-linked chitosan were in a uniform spherical shape with a smooth surface and satisfying agglomeration. The LP9010 microcapsules demonstrated the reasonable thermal stability and persistence of biological activity in the range of -20 °C to 25 °C. Additionally, yogurt obtained from the ST + LB + ELP9010 strain formulation with the addition of microencapsulated LP9010 had smaller particles, better taste, and better stability compared with the yogurt obtained from other strain formulations. As detected by GC-MS, the yogurt formulated with ST + LB + ELP9010 as a strain retained more flavor substances and the content of flavor substances was greater than that of the yogurt obtained from other strain formulations. Therefore, genipin cross-link chitosan could be a suitable microencapsulated material for producing yogurt fermentation strains.
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Affiliation(s)
- Yan-Yan Huang
- Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, College of Food Science and Engineering, Foshan University, Foshan 528225, Guangdong, China
| | - Qing-Bo Yao
- Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, College of Food Science and Engineering, Foshan University, Foshan 528225, Guangdong, China
| | - Xiang-Ze Jia
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
| | - Bo-Ru Chen
- Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, College of Food Science and Engineering, Foshan University, Foshan 528225, Guangdong, China
| | - Rahaman Abdul
- Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, College of Food Science and Engineering, Foshan University, Foshan 528225, Guangdong, China
| | - Lang-Hong Wang
- Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, College of Food Science and Engineering, Foshan University, Foshan 528225, Guangdong, China
| | - Xin-An Zeng
- Guangdong Provincial Key Laboratory of Intelligent Food Manufacturing, College of Food Science and Engineering, Foshan University, Foshan 528225, Guangdong, China; School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China.
| | - Dong-Mei Liu
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China.
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6
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Fungal–Lactobacteria Consortia and Enzymatic Catalysis for Polylactic Acid Production. J Fungi (Basel) 2023; 9:jof9030342. [PMID: 36983510 PMCID: PMC10059961 DOI: 10.3390/jof9030342] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/08/2023] [Accepted: 03/08/2023] [Indexed: 03/14/2023] Open
Abstract
Polylactic acid (PLA) is the main biobased plastic manufactured on an industrial scale. This polymer is synthetized by chemical methods, and there is a strong demand for the implementation of clean technologies. This work focuses on the microbial fermentation of agro-industrial waste rich in starch for the production of lactic acid (LA) in a consolidated bioprocess, followed by the enzymatic synthesis of PLA. Lactic acid bacteria (LAB) and the fungus Rhizopus oryzae were evaluated as natural LA producers in pure cultures or in fungal–lactobacteria co-cultures formed by an LAB and a fungus selected for its metabolic capacity to degrade starch and to form consortia with LAB. Microbial interaction was analyzed by scanning electron microscopy and biofilm production was quantified. The results show that the fungus Talaromyces amestolkiae and Lactiplantibacillus plantarum M9MG6-B2 establish a cooperative relationship to exploit the sugars from polysaccharides provided as carbon sources. Addition of the quorum sensing molecule dodecanol induced LA metabolism of the consortium and resulted in improved cooperation, producing 99% of the maximum theoretical yield of LA production from glucose and 65% from starch. Finally, l-PLA oligomers (up to 19-LA units) and polymers (greater than 5 kDa) were synthetized by LA polycondensation and enzymatic ring-opening polymerization catalyzed by the non-commercial lipase OPEr, naturally produced by the fungus Ophiostoma piceae.
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7
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Camprini L, Pellegrini M, Comi G, Iacumin L. Effects of anaerobic and respiratory adaptation of Lacticaseibacillus casei N87 on fermented sausages production. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2023. [DOI: 10.3389/fsufs.2023.1044357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Abstract
Lacticaseibacillus casei N87 was used as starter culture for the production of fermented sausages. The strain was cultivated in anaerobic (A) and respiratory (growth in presence of oxygen and supplementation with haeme and menaquinone in the growth medium; R) conditions. Control without the starter culture inoculation and with the addition of 150 mg/kg of nitrate was also included. The effect on physico-chemical parameters (pH, Aw, weight loss, and color), microbial population, volatilome, proteolysis as well as the survival of the strain was evaluated during 90 days of ripening. Q-PCR and DGGE-PCR analyses demonstrated the ability of the strain used in this study to adapt to this environment and carry out the sausage's fermentation process. The inoculation of the strain did not have any effect on the Aw values, which decreased similarly in the different samples whereas the pH was lower in A samples (5.2) and the weight loss in R samples (2.5% less than the others). The color parameters of the samples inoculated with the starter cultures were comparable to those of the control added with nitrate. The concentration of aldehydes that usually are identified as marker of oxidation processes was similar in the samples inoculated with the starter cultures adapted under respiratory conditions and in the control. On the contrary, a higher level was detected in the samples inoculated with the starter cultivated under anaerobic conditions. The proteolysis that occurred during the ripening indicates the differentiation of the A samples from the others. Nonetheless, the volatile profiles of the inoculated fermented sausages were similar. The study demonstrated that aerobic adaptation of Lcb. casei N87 starter culture gave similar color parameters and amounts of aldehydes in sausages fermentations without nitrate compared to conventional fermentations with nitrate.
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Racioppo A, Speranza B, Altieri C, Sinigaglia M, Corbo MR, Bevilacqua A. Ultrasound can increase biofilm formation by Lactiplantibacillus plantarum and Bifidobacterium spp. Front Microbiol 2023; 14:1094671. [PMID: 36950165 PMCID: PMC10025361 DOI: 10.3389/fmicb.2023.1094671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/20/2023] [Indexed: 03/08/2023] Open
Abstract
The main goal of this research was to study the effect of an Ultrasound (US) treatment on biofilm formation of Lactiplantibacillus plantarum (strains c19 and DSM 1055), Bifidobacterium animalis subsp. lactis DSM 10140, Bifidobacterium longum subsp. longum DSM 20219, and Bifidobacterium longum subsp. infantis DSM 20088. From a methodological point of view, each microorganism was treated through six US treatments, different for the power (10, 30, or 50% of the net power, 130 W), the duration (2, 6, or 10 min) and the application of pulses (0 or 10 s). After the treatment, a biofilm of the strains was let to form on glass slides and the concentration of sessile cells was analyzed for 16 days. Biofilms formed by untreated microorganisms were used as controls. As a first result, it was found that US significantly increased the concentration of sessile cells of B. longum subsp. infantis, while for some other strains US treatment could not affect the formation of biofilm while improving its stability, as found for L. plantarum DSM1055 after 16 days. The variable mainly involved in this positive effect of US was the duration of the treatment, as biofilm formation and stability were improved only for 2 min-treatments; on the other hand, the effect of power and pulses were strain-dependent. In conclusion, the results suggest practical implication of a US pre-treatment for various fields (improvement of adhesion of microorganisms useful in food or in the gut, biomedical and environmental industries), although further investigations are required to elucidate the mode of action.
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Roux AE, Robert S, Bastat M, Rosinski-Chupin I, Rong V, Holbert S, Mereghetti L, Camiade E. The Role of Regulator Catabolite Control Protein A (CcpA) in Streptococcus agalactiae Physiology and Stress Response. Microbiol Spectr 2022; 10:e0208022. [PMID: 36264242 PMCID: PMC9784791 DOI: 10.1128/spectrum.02080-22] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 09/21/2022] [Indexed: 01/06/2023] Open
Abstract
Streptococcus agalactiae is a leading cause of infections in neonates. This opportunistic pathogen colonizes the vagina, where it has to cope with acidic pH and hydrogen peroxide produced by lactobacilli. Thus, in the host, this bacterium possesses numerous adaptation mechanisms in which the pleiotropic regulators play a major role. The transcriptional regulator CcpA (catabolite control protein A) has previously been shown to be the major regulator involved in carbon catabolite repression in Gram-positive bacteria but is also involved in other functions. By transcriptomic analysis, we characterized the CcpA-dependent gene regulation in S. agalactiae. Approximately 13.5% of the genome of S. agalactiae depends on CcpA for regulation and comprises genes involved in sugar uptake and fermentation, confirming the role of CcpA in carbon metabolism. We confirmed by electrophoretic mobility shift assays (EMSAs) that the DNA binding site called cis-acting catabolite responsive element (cre) determined for other streptococci was effective in S. agalactiae. We also showed that CcpA is of capital importance for survival under acidic and oxidative stresses and is implicated in macrophage survival by regulating several genes putatively or already described as involved in stress response. Among them, we focused our study on SAK_1689, which codes a putative UspA protein. We demonstrated that SAK_1689, highly downregulated by CcpA, is overexpressed under oxidative stress conditions, this overexpression being harmful for the bacterium in a ΔccpA mutant. IMPORTANCE Streptococcus agalactiae is a major cause of disease burden leading to morbidity and mortality in neonates worldwide. Deciphering its adaptation mechanisms is essential to understand how this bacterium manages to colonize its host. Here, we determined the regulon of the pleiotropic regulator CcpA in S. agalactiae. Our findings reveal that CcpA is not only involved in carbon catabolite repression, but is also important for acidic and oxidative stress resistance and survival in macrophages.
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Affiliation(s)
| | | | | | - Isabelle Rosinski-Chupin
- Unité Écologie et Évolution de la Résistance aux Antibiotiques, CNRS UMR3525, Institut Pasteur, Paris, France
| | | | | | - Laurent Mereghetti
- ISP, Université de Tours, INRAE, Tours, France
- CHRU Tours, Service de Bactériologie-Virologie-Hygiène, Tours, France
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Zhang C, Cheng H, Han Y, Wa Y, Chen D, Guan C, Huang Y, Gu R. Transcriptome-phenotype matching analysis of how nitrogen sources influence Lacticaseibacillus rhamnosus tolerance to heat stress and oxidative stress. Microb Cell Fact 2022; 21:257. [PMID: 36510221 PMCID: PMC9746023 DOI: 10.1186/s12934-022-01985-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Spray drying is the most cost-effective production method for lactic acid bacteria starters, but heat and oxidative stresses result in low survival rates. The heat stress and oxidative stress tolerance of Lacticaseibacillus rhamnosus cultured in tryptone-free MRS (NP-MRS) broth was much stronger than that in MRS or tryptone-free MRS broth supplemented with phenylalanine (Phe-MRS). Here, multiple transcriptome-phenotype matching was performed on cells cultured in NP-MRS, MRS and Phe-MRS broths to reveal the mechanism by which nitrogen sources influence L. rhamnosus tolerance to heat stress and oxidative stress. RESULTS Compared with cells cultured in NP-MRS broth, 83 overlapping differentially expressed genes (DEGs) were downregulated by either tryptone or phenylalanine. The overlapping DEGs were mainly classified into carbohydrate metabolism and membrane transport pathways, which are often repressed by glucose during carbon catabolite repression (CCR). In the presence of glucose, the heat stress or oxidative stress tolerance of L. rhamnosus hsryfm 1301 was not strengthened by supplementation with secondary carbohydrates. Replacing glucose with mannose, fructose or ribose improved the heat stress and oxidative stress tolerance of L. rhamnosus hsryfm 1301 (5 to 46-fold). CONCLUSIONS Alleviation of CCR might be a reason for the resistance of L. rhamnosus hsryfm 1301 to heat stress and oxidative stress in a low-nitrogen environment. The survival rate of L. rhamnosus during spray drying will hopefully be improved by relieving CCR. It is a new discovery that nitrogen sources influence CCR in L. rhamnosus.
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Affiliation(s)
- Chenchen Zhang
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China.,Jiangsu Dairy Biotechnology Engineering Research Center, Yangzhou, People's Republic of China
| | - Haohao Cheng
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China
| | - Yuemei Han
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China
| | - Yunchao Wa
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China
| | - Dawei Chen
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China
| | - Chengran Guan
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China.,Jiangsu Dairy Biotechnology Engineering Research Center, Yangzhou, People's Republic of China
| | - Yujun Huang
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China.,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China
| | - Ruixia Gu
- College of Food Science and Engineering, Yangzhou University, 196 Huayang Xilu, Yangzhou, 225100, People's Republic of China. .,Jiangsu Key Laboratory of Dairy Biotechnology and Safety Control, Yangzhou, People's Republic of China.
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Growth fitness, heme uptake and genomic variants in mutants of oxygen-tolerant Lacticaseibacillus casei and Lactiplantibacillus plantarum strains. Microbiol Res 2022; 262:127096. [DOI: 10.1016/j.micres.2022.127096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 06/04/2022] [Accepted: 06/14/2022] [Indexed: 11/18/2022]
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12
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Paulino do Nascimento LC, Lacerda DC, Ferreira DJS, de Souza EL, de Brito Alves JL. Limosilactobacillus fermentum, Current Evidence on the Antioxidant Properties and Opportunities to be Exploited as a Probiotic Microorganism. Probiotics Antimicrob Proteins 2022; 14:960-979. [PMID: 35467236 DOI: 10.1007/s12602-022-09943-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2022] [Indexed: 12/14/2022]
Abstract
The unbalance in the production and removal of oxygen-reactive species in the human organism leads to oxidative stress, a physiological condition commonly linked to the occurrence of cancer, neurodegenerative, inflammatory, and metabolic disorders. The implications of oxidative stress in the gut have been associated with gut microbiota impairments and gut dysbiosis. Some lactobacilli strains have shown an efficient antioxidant system capable of protecting against oxidative stress and related-chronic diseases. Recently, in vitro and experimental studies and some clinical trials have demonstrated the efficacy of the administration of various Limosilactobacillus fermentum strains to modulate beneficially the host antioxidant system resulting in the amelioration of a variety of systemic diseases phenotypes. This review presents and discusses the currently available studies on identifying L. fermentum strains with anti-oxidant properties, their sources, range of the administered doses, and duration of the intervention in experiments with animals and clinical trials. This review strives to serve as a relevant and well-cataloged reference of L. fermentum strains with capabilities of inducing anti-oxidant effects and health-promoting benefits to the host, envisaging their broad applicability to disease control.
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Affiliation(s)
| | - Diego Cabral Lacerda
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, Campus I - João Pessoa, Paraíba, Brazil
| | | | - Evandro Leite de Souza
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, Campus I - João Pessoa, Paraíba, Brazil
| | - José Luiz de Brito Alves
- Department of Nutrition, Health Sciences Center, Federal University of Paraíba, Campus I - João Pessoa, Paraíba, Brazil.
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Selection of Lactiplantibacillus Strains for the Production of Fermented Table Olives. Microorganisms 2022; 10:microorganisms10030625. [PMID: 35336200 PMCID: PMC8956003 DOI: 10.3390/microorganisms10030625] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/10/2022] [Accepted: 03/11/2022] [Indexed: 12/07/2022] Open
Abstract
Lactiplantibacillus strains (n. 77) were screened for technological properties (e.g., xylose fermentation, EPS production, antimicrobial activity, tolerance to NaCl and phenolic compounds, oleuropein degradation and hydroxytyrosol formation) relevant for the production of fermented table olives. Survival to olive mill wastewater (OMW) and to simulated gastro-intestinal tract (GIT), the capability to grow at different combinations of NaCl and pH values, radical scavenging activities and biofilm formation were further investigated in 15 selected strains. The screening step revealed high diversity among Lactiplantibacillus strains. Most of the strains were able to ferment xylose, while only a few strains produced EPS and had inhibitory activity against Y. lipolytica. Resistance to phenolic compounds (gallic, protocatechuic, hydroxybenzoic and syringic acids), as well as the ability to release hydroxytyrosol from oleuropein, was strain-specific. OMWs impaired the survival of selected strains, while combinations of NaCl ≤ 6% and pH ≥ 4.0 were well tolerated. DPPH and hydroxyl radical degradation were strain-dependent, while the capability to form biofilm was affected by incubation time. Strains were very tolerant to the GIT. The genome of Lpb. pentosus O17 was sequenced and analysed to verify the presence of genes involved in the degradation and metabolism of phenolic compounds. O17 lacks carboxylesterase and gallate decarboxylase (subunits B and D) sequences, and its gene profile differs from that of other publicly available Lpb. pentosus genomes.
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Ricciardi A, Storti LV, Giavalisco M, Parente E, Zotta T. The Effect of Respiration, pH, and Citrate Co-Metabolism on the Growth, Metabolite Production and Enzymatic Activities of Leuconostoc mesenteroides subsp. cremoris E30. Foods 2022; 11:foods11040535. [PMID: 35206012 PMCID: PMC8871477 DOI: 10.3390/foods11040535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/28/2022] [Accepted: 02/10/2022] [Indexed: 02/05/2023] Open
Abstract
Leuconostoc mesenteroides includes strains used as starter and/or adjunct cultures for the production of several fermented foods. In this study, the effect of anaerobic and respiratory cultivations, as well as of citrate supplementation and different pH values, was evaluated on growth, biomass, metabolite, and enzymatic activities (pyruvate oxidase, POX; NADH-dependent oxidase, NOX; NADH-dependent peroxidase, NPR) of Leuconostoc mesenteroides subsp. cremoris E30. We compared the respiration-increased growth rate and biomass production of Leuc. mesenteroides E30 to anaerobic cultivation. A supplementation of citrate impaired the growth rate of the respiratory cells. As expected, anaerobic cultures did not consume oxygen, and a similar trend in oxygen uptake was observed in respiratory cultures. The aerobic incubation caused changes in the metabolic pattern, reducing the production of ethanol in favour of acetic acid. Citrate was already exhausted in the exponential phase and did not affect the yields in acetic acid and ethanol. NOX activity increased in the presence of oxygen, while catalase was also detected in the absence of hemin. The absence of H2O2 suggested its degradation by NPR and catalase. Respiratory cultivation provided benefits (increase in growth rate, biomass, and activity in antioxidant enzymes) for Leuc. mesenteroides E30. Therefore, the exploitation of respiratory phenotypes may be useful for the formulation of competitive starter or adjunct cultures.
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Watthanasakphuban N, Virginia LJ, Haltrich D, Peterbauer C. Analysis and Reconstitution of the Menaquinone Biosynthesis Pathway in Lactiplantibacillus plantarum and Lentilactibacillus buchneri. Microorganisms 2021; 9:1476. [PMID: 34361912 PMCID: PMC8303990 DOI: 10.3390/microorganisms9071476] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 12/29/2022] Open
Abstract
In Lactococcus lactis and some other lactic acid bacteria, respiratory metabolism has been reported upon supplementation with only heme, leading to enhanced biomass formation, reduced acidification, resistance to oxygen, and improved long-term storage. Genes encoding a complete respiratory chain with all components were found in genomes of L. lactis and Leuconostoc mesenteroides, but menaquinone biosynthesis was found to be incomplete in Lactobacillaceae (except L. mesenteroides). Lactiplantibacillus plantarum has only two genes (menA, menG) encoding enzymes in the biosynthetic pathway (out of eight), and Lentilactobacillus buchneri has only four (menA, menB, menE, and menG). We constructed knock-out strains of L. lactis defective in menA, menB, menE, and menG (encoding the last steps in the pathway) and complemented these by expression of the extant genes from Lactipl. plantarum and Lent. buchneri to verify their functionality. Three of the Lactipl. plantarum biosynthesis genes, lpmenA1, lpmenG1, and lpmenG2, as well as lbmenB and lbmenG from Lent. buchneri, reconstituted menaquinone production and respiratory growth in the deficient L. lactis strains when supplemented with heme. We then reconstituted the incomplete menaquinone biosynthesis pathway in Lactipl. plantarum by expressing six genes from L. lactis homologous to the missing genes in a synthetic operon with two inducible promoters. Higher biomass formation was observed in Lactipl. plantarum carrying this operon, with an OD600 increase from 3.0 to 5.0 upon induction.
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Affiliation(s)
- Nisit Watthanasakphuban
- Department of Food Sciences and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria; (N.W.); (L.J.V.); (D.H.)
- Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Ludovika Jessica Virginia
- Department of Food Sciences and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria; (N.W.); (L.J.V.); (D.H.)
| | - Dietmar Haltrich
- Department of Food Sciences and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria; (N.W.); (L.J.V.); (D.H.)
| | - Clemens Peterbauer
- Department of Food Sciences and Technology, BOKU-University of Natural Resources and Life Sciences, Muthgasse 18, 1190 Vienna, Austria; (N.W.); (L.J.V.); (D.H.)
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16
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Catone MV, Palomino MM, Legisa DM, Fina Martin J, Monedero García V, Ruzal SM, Allievi MC. Lactic acid production using cheese whey based medium in a stirred tank reactor by a ccpA mutant of Lacticaseibacillus casei. World J Microbiol Biotechnol 2021; 37:61. [PMID: 33719024 DOI: 10.1007/s11274-021-03028-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 03/02/2021] [Indexed: 11/24/2022]
Abstract
In lactobacilli, CcpA is known to modulate the expression of genes involved in sugar metabolism, stress response and aerobic adaptation. This study aimed to evaluate a ccpA mutant of Lacticaseibacillus casei BL23 to increase lactic acid production using cheese whey. The ccpA derivative (BL71) showed better growth than the L. casei wild-type in the whey medium. In a stirred tank reactor, at 48 h, lactate production by BL71 was eightfold higher than that by BL23. In batch fermentations, the final values reached were 44.23 g L-1 for BL71 and 27.58 g L-1 for BL23. Due to a decrease in the delay of lactate production in the mutant, lactate productivity increased from 0.17 g (L.h)-1 with BL23 to 0.80 g (L.h)-1 with BL71. We found that CcpA would play additional roles in nitrogen metabolism by the regulation of the proteolytic system. BL71 displayed higher activity of the PepX, PepQ and PrtP enzymes than BL23. Analysis of prtP expression confirmed this deregulation in BL71. Promoter analysis of the prtP gene revealed CcpA binding sites with high identity to the cre consensus sequence and the interaction of CcpA with this promoter was confirmed in vitro. We postulate that deregulation of the proteolytic system in BL71 allows a better exploitation of nitrogen resources in cheese whey, resulting in enhanced fermentation capacity. Therefore, the ccpA gene could be a good target for future technological developments aimed at effective and inexpensive lactate production from dairy industrial wastes.
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Affiliation(s)
- Mariela Verónica Catone
- Centro de Investigación y Desarrollo en Biotecnología Industrial, Instituto Nacional de Tecnología Industrial (INTI), Av. General Paz 5445, B1650AAC, San Martín, Buenos Aires, Argentina
| | - María Mercedes Palomino
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires - Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN) - CONICET, Ciudad Universitaria, C1428EGA, CABA, Argentina
| | - Danilo Mario Legisa
- Centro de Investigación y Desarrollo en Biotecnología Industrial, Instituto Nacional de Tecnología Industrial (INTI), Av. General Paz 5445, B1650AAC, San Martín, Buenos Aires, Argentina
| | - Joaquina Fina Martin
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires - Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN) - CONICET, Ciudad Universitaria, C1428EGA, CABA, Argentina
| | - Vicente Monedero García
- Instituto de Agroquímica y Tecnología de Alimentos-Consejo Superior de Investigaciones Científicas (IATA-CSIC), Av. Agustín Escardino 7, 46980, Paterna, Valencia, España
| | - Sandra Mónica Ruzal
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires - Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN) - CONICET, Ciudad Universitaria, C1428EGA, CABA, Argentina
| | - Mariana Claudia Allievi
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires - Instituto de Química Biológica de la Facultad de Ciencias Exactas y Naturales (IQUIBICEN) - CONICET, Ciudad Universitaria, C1428EGA, CABA, Argentina.
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Towards a starter culture of Lactobacillus plantarum AFS13: Assessment of more relevant effects for in vitro production and preservation thereof, via fractional factorial design methodology. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.110119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Yan M, Wang BH, Fu X, Gui M, Wang G, Zhao L, Li R, You C, Liu Z. Petunidin-Based Anthocyanin Relieves Oxygen Stress in Lactobacillus plantarum ST-III. Front Microbiol 2020; 11:1211. [PMID: 32733390 PMCID: PMC7358587 DOI: 10.3389/fmicb.2020.01211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Accepted: 05/12/2020] [Indexed: 12/18/2022] Open
Abstract
Application of probiotics in the food industry has been hampered by their sensitivity to challenging conditions that reduce their vitality in food matrices. A lot of attempts have been made to promote the growth of these probiotics in the aspect of nutrition demands. Among the other adverse conditions, oxygen stress can restrict the growth of probiotics and has not yet been paid enough attention to. In this study, the effect of a petunidin-based anthocyanin (ACN) on the growth of probiotic Lactobacillus plantarum ST-III was investigated under oxygen stress. The growth of ST-III was analyzed through spot assay on agar plates as well as plating-based enumeration of the viable cells in the liquid culture. Results indicated that ACN could efficiently improve the growth of ST-III under oxygen stress, whereas no effect was observed in the absence of oxygen stress. Further investigations indicated that ACN reduced the oxido-reduction potential of the culture; meanwhile, it exerted a positive transcriptional regulation on the thioredoxin system of ST-III, leading to a decrease in reactive oxygen species accumulation within the cells. Moreover, ACN enabled the growth of ST-III in reconstituted skim milk and promoted the formation of milk clots. These results revealed the role of a petunidin-based ACN in oxygen stress relief and highlighted its potential in manufacture and preservation of L. plantarum-based dairy products.
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Affiliation(s)
- Minghui Yan
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co., Ltd., Shanghai, China
| | - Bing-Hua Wang
- Department of Clinical Laboratory, Central Laboratory, Jing'an District Center Hospital of Shanghai, Fudan University, Shanghai, China
| | - Xiaofei Fu
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co., Ltd., Shanghai, China
| | - Min Gui
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co., Ltd., Shanghai, China
| | | | - Lei Zhao
- School of Life Sciences, Shanghai University, Shanghai, China
| | - Ruiying Li
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co., Ltd., Shanghai, China.,College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Chunping You
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co., Ltd., Shanghai, China
| | - Zhenmin Liu
- State Key Laboratory of Dairy Biotechnology, Shanghai Engineering Research Center of Dairy Biotechnology, Dairy Research Institute, Bright Dairy & Food Co., Ltd., Shanghai, China
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Zhai Z, Yang Y, Wang H, Wang G, Ren F, Li Z, Hao Y. Global transcriptomic analysis of Lactobacillus plantarum CAUH2 in response to hydrogen peroxide stress. Food Microbiol 2020; 87:103389. [DOI: 10.1016/j.fm.2019.103389] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 10/27/2019] [Accepted: 11/20/2019] [Indexed: 12/25/2022]
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20
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Zhang G, Liu L, Li C. Effects of ccpA gene deficiency in Lactobacillus delbrueckii subsp. bulgaricus under aerobic conditions as assessed by proteomic analysis. Microb Cell Fact 2020; 19:9. [PMID: 31931839 PMCID: PMC6956489 DOI: 10.1186/s12934-020-1278-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Accepted: 01/03/2020] [Indexed: 12/03/2022] Open
Abstract
Background Aerobic growth provides benefits in biomass yield and stress tolerance of Lactobacillus delbrueckii subsp. bulgaricus (L. bulgaricus). Catabolite control protein A (CcpA) is a master regulator involved in the aerobic and anaerobic growth, metabolic production and stress response in L. bulgaricus, but its potential molecular mechanisms remains unclear. The aim of this study is to elucidate the role of CcpA in L. bulgaricus in aerobic growth at the proteomic perspective. Results The differential proteomic analysis was performed on the L. bulgaricus ATCC11842 and its ccpA inactivated mutant strain using iTRAQ technology. A total of 132 differentially expressed proteins were obtained, among which 58 were up-regulated and 74 were down-regulated. These proteins were mainly involved in the cellular stress response, carbohydrate and energy metabolism, amino acid transport and protein synthesis, genetic information processing. Moreover, inactivation of ccpA negatively affected the expression of key enzymes involved in glycolysis pathway, while it enhanced the expression of proteins related to the pyruvate pathway, supporting the conclusion that CcpA mediated the shift from homolactic fermentation to mixed acid fermentation in L. bulgaricus. Conclusions Overall, these results showed that the role of CcpA in L. bulgaricus as a pleiotropic regulator in aerobic metabolism and stress response. This proteomic analysis also provide new insights into the CcpA-mediated regulatory network of L. bulgaricus and potential strategies to improve the production of starter and probiotic cultures based on the metabolic engineering of global regulators.
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Affiliation(s)
- Guofang Zhang
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, 150030, China
| | - Libo Liu
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Chun Li
- Key Laboratory of Dairy Science, College of Food Science, Northeast Agricultural University, Harbin, 150030, China.
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21
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Maresca D, De Filippis F, Robertiello A, Mauriello G. Metabolic Profiling and Cold-Starvation Stress Response of Oxygen-Tolerant Lactobacillus gasseri Strains Cultured in Batch Bioreactor. Microorganisms 2019; 7:microorganisms7070200. [PMID: 31311070 PMCID: PMC6680863 DOI: 10.3390/microorganisms7070200] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/08/2019] [Accepted: 07/10/2019] [Indexed: 11/16/2022] Open
Abstract
Phenotypic and genotypic evidence indicates that many LAB strains can grow in presence of oxygen and can shift from fermentative to aerobic and/or respiratory metabolism. The aerobic and respiratory growth of several LAB species have been studied, allowing the selection of strains showing improved biomass production, long-term survival, and resistance under oxygen and stress conditions. The aim of this work was to observe the adaptation of two Lactobacillus gasseri strains, described in a previous work, to aerobic (air injection) and respiratory (air injection plus hemin and menaquionone) conditions obtained in a batch bioreactor. One strain showed the higher biomass production and oxygen consumption as well as the lower acidification in respiratory condition. Instead, the other one grew better in aerobic condition, even though the higher resistance to cold-starvation stress was registered in respiratory condition. In silico analysis revealed notable differences between AL3 and AL5 genomes and that of the type strain. This work contributes to understanding the adaptation response of lactobacilli to aerobic and respiratory metabolism. We demonstrated that the supposed activation of respiratory metabolism may provide several modifications to cell physiology. These features may be relevant in some technological and health-promoting applications, including starter and probiotic formulations.
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Affiliation(s)
- Diamante Maresca
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, NA, Italy
| | - Francesca De Filippis
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, NA, Italy
| | - Alessandro Robertiello
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, NA, Italy
| | - Gianluigi Mauriello
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, NA, Italy.
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Chen C, Wang L, Lu Y, Yu H, Tian H. Comparative Transcriptional Analysis of Lactobacillus plantarum and Its ccpA-Knockout Mutant Under Galactooligosaccharides and Glucose Conditions. Front Microbiol 2019; 10:1584. [PMID: 31338086 PMCID: PMC6629832 DOI: 10.3389/fmicb.2019.01584] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 06/25/2019] [Indexed: 01/02/2023] Open
Abstract
Galactooligosaccharides (GOS) are documented prebiotic compounds, but knowledge of the metabolic and regulatory mechanisms of GOS utilization by lactic acid bacteria is still limited. Here we used transcriptome and physiological analyses to investigate the differences in the logarithmic growth phase of Lactobacillus plantarum and L. plantarum ΔccpA metabolizing GOS or glucose as the sole source of carbohydrate. In total, 489 genes (16%) were differentially transcribed in the wild-type L. plantarum grown on glucose and GOS and the value is decreased to 7% due to the loss of ccpA. Only 6% genes were differentially expressed when the wild-type and the ccpA mutant were compared on GOS. Transcriptome data revealed that the carbon sources significantly affected the expression of several genes, and some of the genes were mediated by CcpA. In particular, lac and gal gene clusters resembled the corresponding clusters in L. acidophilus NCFM that are involved in GOS metabolism, indicating that these clusters may be participating in GOS utilization. Moreover, reverse transcription-PCR analysis showed that GOS-related gene clusters were organized in five independent polycistronic units. In addition, many commonalities were found between fructooligosaccharides and GOS metabolism in L. plantarum, including differentially expressed genes involved in oligosaccharide metabolism, conversion of metabolites, and changes in fatty acid biosynthesis. Overall, our findings provide new information on gene transcription and the metabolic mechanism associated with GOS utilization, and confirm that CcpA plays an important role in carbon metabolism regulation in L. plantarum.
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Affiliation(s)
- Chen Chen
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Linlin Wang
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Yanqing Lu
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Haiyan Yu
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Huanxiang Tian
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
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Ricciardi A, Zotta T, Ianniello RG, Boscaino F, Matera A, Parente E. Effect of Respiratory Growth on the Metabolite Production and Stress Robustness of Lactobacillus casei N87 Cultivated in Cheese Whey Permeate Medium. Front Microbiol 2019; 10:851. [PMID: 31068919 PMCID: PMC6491770 DOI: 10.3389/fmicb.2019.00851] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 04/02/2019] [Indexed: 01/02/2023] Open
Abstract
Cheese whey permeate (WP) is a low-cost feedstock used for the production of biomass and metabolites from several lactic acid bacteria (LAB) strains. In this study, Lactobacillus casei N87 was cultivated in an optimized WP medium (WPM) to evaluate the effect of anaerobic and respiratory conditions on the growth performances (kinetics, biomass yield), consumption of sugars (lactose, galactose, glucose) and citrate, metabolite production [organic acids, volatile organic compounds (VOCs)] and stress survival (oxidative, heat, freezing, freeze-drying). The transcription of genes involved in the main pathways for pyruvate conversion was quantified through Real Time-PCR to elucidate the metabolic shifts due to respiratory state. Cultivation in WPM induced a diauxic growth in both anaerobic and respiratory conditions, and L. casei N87 effectively consumed the lactose and galactose present in WPM. Genomic information suggested that membrane PTS system and tagatose-6-P pathway mediated the metabolism of lactose and galactose in L. casei N87. Respiration did not affect specific growth rate and biomass production, but significantly altered the pyruvate conversion pathways, reducing lactate accumulation and promoting the formation of acetate, acetoin and diacetyl to ensure the redox balance. Ethanol was not produced under either cultivation. Pyruvate oxidase (pox), acetate kinase (ack), α-acetolactate decarboxylase (ald), acetolactate synthase (als) and oxaloacetate decarboxylase (oad) genes were up-regulated under respiration, while L-lactate dehydrogenase (ldh), pyruvate formate lyase (pfl), pyruvate carboxylase (pyc), and phosphate acetyltransferase (pta) were down regulated by oxygen. Transcription analysis was consistent with metabolite production, confirming that POX-ACK and ALS-ALD were the alternative pathways activated under aerobic cultivation. Respiratory growth affected the production of volatile compounds useful for the development of aroma profile in several fermented foods, and promoted the survival of L. casei N87 to oxidative stresses and long-term storage. This study confirmed that the respiration-based technology coupled with cultivation on low-cost medium may be effectively exploited to produce competitive and functional starter and/or adjunct cultures. Our results, additionally, provided further information on the activation and regulation of metabolic pathways in homofermentative LAB grown under respiratory promoting conditions.
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Affiliation(s)
- Annamaria Ricciardi
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Teresa Zotta
- Istituto di Scienze dell'Alimentazione - Consiglio Nazionale delle Ricerche (CNR), Avellino, Italy
| | - Rocco Gerardo Ianniello
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Floriana Boscaino
- Istituto di Scienze dell'Alimentazione - Consiglio Nazionale delle Ricerche (CNR), Avellino, Italy
| | - Attilio Matera
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Eugenio Parente
- Dipartimento di Scienze, Università degli Studi della Basilicata, Potenza, Italy
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Siciliano RA, Pannella G, Lippolis R, Ricciardi A, Mazzeo MF, Zotta T. Impact of aerobic and respirative life-style on Lactobacillus casei N87 proteome. Int J Food Microbiol 2019; 298:51-62. [PMID: 30925356 DOI: 10.1016/j.ijfoodmicro.2019.03.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 01/10/2019] [Accepted: 03/10/2019] [Indexed: 12/27/2022]
Abstract
Lactic acid bacteria (LAB) are used as starter, adjunct and/or probiotic cultures in fermented foods. Several species are recognized as oxygen-tolerant anaerobes, and aerobic and respiratory cultivations may provide them with physiological and technological benefits. In this light, mechanisms involved in the adaptation to aerobic and respiratory (supplementation with heme and menaquinone) growth conditions of the O2-tolerant strain Lactobacillus casei N87 were investigated by proteomics. In fact, in this bacterial strain, respiration induced an increase in biomass yield and robustness to oxidative, long-term starvation and freeze-drying stresses, while high concentrations of dissolved O2 (dO2 60%) negatively affected its growth and cell survival. Proteomic results well paralleled with physiological and metabolic features and clearly showed that aerobic life-style led to a higher abundance of several proteins involved in carbohydrate metabolism and stress response mechanisms and, concurrently, impaired the biosynthesis of proteins involved in nucleic acid formation and translation processes, thus providing evidence at molecular level of the significant damage to L.casei N87 fitness. On the contrary, the activation of respiratory pathways due to heme and menaquinone supplementation, led to a decreased amount of chaperones and other stress related proteins. These findings confirmed that respiration reduced oxidative stress condition, allowing to positively modulate the central carbohydrate and energy metabolism and improve growth and stress tolerance features. Results of this study could be potentially functional to develop competitive adjunct and probiotic cultures effectively focused on the improvement of quality of fermented foods and the promotion of human health.
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Affiliation(s)
- Rosa Anna Siciliano
- Institute of Food Sciences, National Research Council (CNR-ISA), Avellino, Italy
| | - Gianfranco Pannella
- School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, Potenza, Italy
| | - Rosa Lippolis
- Institute of Biomembranes, Bioenergetics and Molecular Biotechnologies, National Research Council (CNR-IBIOM), Bari, Italy
| | - Annamaria Ricciardi
- School of Agricultural, Forestry, Food and Environmental Sciences, University of Basilicata, Potenza, Italy
| | | | - Teresa Zotta
- Institute of Food Sciences, National Research Council (CNR-ISA), Avellino, Italy
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Yu S, Zhao Z, Xu X, Li M, Li P. Characterization of three different types of extracellular vesicles and their impact on bacterial growth. Food Chem 2019; 272:372-378. [DOI: 10.1016/j.foodchem.2018.08.059] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 07/27/2018] [Accepted: 08/14/2018] [Indexed: 12/18/2022]
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Lu Y, Song S, Tian H, Yu H, Zhao J, Chen C. Functional analysis of the role of CcpA in Lactobacillus plantarum grown on fructooligosaccharides or glucose: a transcriptomic perspective. Microb Cell Fact 2018; 17:201. [PMID: 30593274 PMCID: PMC6309078 DOI: 10.1186/s12934-018-1050-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 12/24/2018] [Indexed: 12/19/2022] Open
Abstract
Background The catabolite control protein A (CcpA) is a master regulator of many important cellular processes in Gram-positive bacteria. In Lactobacillus plantarum, CcpA directly or indirectly controls the transcription of a large number of genes that are involved in carbohydrate metabolism, aerobic and anaerobic growth, stress response and metabolite production, but its role in response to different carbon sources remains unclear. Results Here a combined transcriptomic and physiological approach was used to survey the global alterations that occurred during the logarithmic growth phase of wild-type and ccpA mutant strains of L. plantarum ST-III using fructooligosaccharides (FOS) or glucose as the sole carbon source. The inactivation of ccpA significantly affected the growth and production of metabolites under both carbon sources. About 15% of the total genes were significantly altered between wild-type and ccpA strains grown on glucose and the value is deceased to 12% when these two strains were compared on FOS, while only 7% were obviously changed due to the loss of CcpA when comparing strains grown on glucose and FOS. Although most of the differentially expressed genes mediated by CcpA are glucose dependent, FOS can also induce carbon catabolite repression (CCR) through the CcpA pathway. Moreover, the inactivation of ccpA led to a transformation from homolactic fermentation to mixed fermentation under aerobic conditions. CcpA can control genes directly by binding in the regulatory region of the target genes (mixed fermentation), indirectly through local regulators (fatty acid biosynthesis), or have a double effect via direct and indirect regulation (FOS metabolism). Conclusion Overall, our results show that CcpA plays a central role in response to carbon source and availability of L. plantarum and provide new insights into the complex and extended regulatory network of lactic acid bacteria.![]() Electronic supplementary material The online version of this article (10.1186/s12934-018-1050-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yanqing Lu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Sichao Song
- Shanghai-MOST Key Laboratory of Health and Disease Genomics, Chinese National Human Genome Center at Shanghai, Shanghai, 201203, People's Republic of China
| | - Huaixiang Tian
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Haiyan Yu
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi, 214122, Jiangsu Province, People's Republic of China
| | - Chen Chen
- School of Perfume and Aroma Technology, Shanghai Institute of Technology, Shanghai, 201418, People's Republic of China.
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Factors affecting gene expression and activity of heme- and manganese-dependent catalases in Lactobacillus casei strains. Int J Food Microbiol 2018; 280:66-77. [DOI: 10.1016/j.ijfoodmicro.2018.05.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 04/09/2018] [Accepted: 05/07/2018] [Indexed: 01/02/2023]
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Isolation and characterization of a new fructophilic Lactobacillus plantarum FPL strain from honeydew. ANN MICROBIOL 2018; 68:459-470. [PMID: 29983672 PMCID: PMC6008367 DOI: 10.1007/s13213-018-1350-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 05/21/2018] [Indexed: 11/17/2022] Open
Abstract
In the present study, a Lactobacillus plantarum FPL strain exhibiting fructophilic behavior has been isolated for the first time from honeydew. It is a probably syntrophic bacterium inhabiting the gastrointestinal tract of Coccus hesperidum L. and taking part in sugar metabolism. The promising growth characteristics and biochemical properties of Lb. plantarum FPL indicate that this may be a facultatively fructophilic species, whose properties are not associated with the loss of the alcohol/acetaldehyde dehydrogenase gene. The article attempts to classify the peculiar behavior of this strain by means of tests that are characteristic for FLAB as well as through a classic identification approach. In this study, we used a reference strain Lb. plantarum NRRL B-4496, which showed no fructophilic properties. With the FLAB group, the new strain shares the habit, such as a fructose-rich environment, the preference of this sugar for growth, and similar growth curves. However, it exceeds FLAB in terms of osmotolerance to high sugar content. The fructophilic Lb. plantarum FPL strain can proliferate and grow on a medium wherein the sugar concentration is 45 and 50% (w/v). Our findings indicate that honeydew can be a promising source of new fructophilic lactic acid bacteria.
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Chen C, Lu Y, Wang L, Yu H, Tian H. CcpA-Dependent Carbon Catabolite Repression Regulates Fructooligosaccharides Metabolism in Lactobacillus plantarum. Front Microbiol 2018; 9:1114. [PMID: 29896178 PMCID: PMC5986886 DOI: 10.3389/fmicb.2018.01114] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Accepted: 05/11/2018] [Indexed: 01/12/2023] Open
Abstract
Fructooligosaccharides (FOSs) metabolism in Lactobacillus plantarum is controlled by two gene clusters, and the global regulator catabolite control protein A (CcpA) may be involved in the regulation. To understand the mechanism, this study focused on the regulation relationships of CcpA toward target genes and the binding effects on the catabolite responsive element (cre). First, reverse transcription-PCR analysis of the transcriptional organization of the FOS-related gene clusters showed that they were organized in three independent polycistronic units. Diauxic growth, hierarchical utilization of carbohydrates and repression of FOS-related genes were observed in cultures containing FOS and glucose, suggesting carbon catabolite repression (CCR) control in FOS utilization. Knockout of ccpA gene eliminated these phenomena, indicating the principal role of this gene in CCR of FOS metabolism. Furthermore, six potential cre sites for CcpA binding were predicted in the regions of putative promoters of the two clusters. Direct binding was confirmed by electrophoretic mobility shift assays in vitro and chromatin immunoprecipitation in vivo. The results of the above studies suggest that CcpA is a vital regulator of FOS metabolism in L. plantarum and that CcpA-dependent CCR regulates FOS metabolism through the direct binding of CcpA toward the cre sites in the promoter regions of FOS-related clusters.
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Affiliation(s)
- Chen Chen
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Yanqing Lu
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Linlin Wang
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Haiyan Yu
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
| | - Huaixiang Tian
- Department of Food Science and Technology, Shanghai Institute of Technology, Shanghai, China
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Polak-Berecka M, Kubik-Komar A, Gustaw K, Michalak M, Kazimierczak W, Waśko A. Functional traits of Lactobacillus plantarum from fermented Brassica oleracea var. capitata L. in view of multivariate statistical analysis. Eur Food Res Technol 2018. [DOI: 10.1007/s00217-018-3084-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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31
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Zotta T, Ricciardi A, Ianniello RG, Storti LV, Glibota NA, Parente E. Aerobic and respirative growth of heterofermentative lactic acid bacteria: A screening study. Food Microbiol 2018; 76:117-127. [PMID: 30166132 DOI: 10.1016/j.fm.2018.02.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 01/17/2018] [Accepted: 02/24/2018] [Indexed: 01/22/2023]
Abstract
Heterofermentative lactic acid bacteria (76 strains) belonging to Lactobacillus, Leuconostoc and Weissella species which are important in fermentation, spoilage or as probiotics were screened in a factorial experiment for their ability to grow, produce catalase and consume oxygen in aerobiosis or in anaerobiosis, with or without supplementation with hemin and/or menaquinone in a medium containing glucose as a carbohydrate source. Aerobiosis improved growth with a few exceptions. The effect of supplementation with heme and/or menaquinone was strain specific and clear evidence of heme-boosted respiration was found in some cases. Heme-catalase was produced by strains of L. brevis, W. minor and Leuc. mesenteroides; some strains of the latter species produced non-heme catalase. Shaken flasks experiments showed that aerobic growth resulted in increased maximum growth rate and in a limited increase in biomass. Heme supplementation during aerobic growth resulted in a further increase in growth rate and final biomass only for a few strains; this was often related to catalase, which was also responsible for increased tolerance of H2O2. In both experiments we found evidence of heme toxicity, especially in anaerobiosis and in absence of menaquinone. Dose response curves for aerobic growth in the presence of combinations of hemin and menaquinone were non-monotonic, with growth stimulation at low doses of heme (<2.5 mg/l) and toxicity at higher doses. Menaquinone at 0.25-8 mg/l increased growth stimulation and partially reduced toxicity.
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Affiliation(s)
- Teresa Zotta
- Istituto di Scienze dell'Alimentazione-CNR, Avellino, Italy
| | - Annamaria Ricciardi
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy.
| | - Rocco G Ianniello
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Livia V Storti
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Nicolas A Glibota
- Departamento de Ciencias de la Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, Campus de Excelencia Internacional Agroalimentario (ceiA3), Jaén, 23071, Spain
| | - Eugenio Parente
- Dipartimento di Scienze, Università degli Studi della Basilicata, Potenza, Italy
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Maresca D, Zotta T, Mauriello G. Adaptation to Aerobic Environment of Lactobacillus johnsonii/gasseri Strains. Front Microbiol 2018; 9:157. [PMID: 29479342 PMCID: PMC5811513 DOI: 10.3389/fmicb.2018.00157] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 01/23/2018] [Indexed: 01/26/2023] Open
Abstract
Oxygen is considered one of the main factors affecting probiotic bacteria survival due to the induction of oxidative damages caused by the action of reactive oxygen species (ROS). It has been shown that oxidative stress resistance in lactic acid bacteria is strongly dependent on the type of cell metabolism. Shift from fermentative to respiratory metabolism (through the addition of heme and menaquinone and in presence of oxygen) was associated to increase in biomass, long-term survival, and production of antioxidant enzymes. The aim of this work was to investigate the effect of aerobic (presence of oxygen) and respiratory (presence of oxygen, heme, and menaquinone) cultivation on the growth kinetic, catalase production, oxygen uptake, and oxidative stress response of Lactobacillus johnsonii/gasseri strains previously isolated from infant feces. Seven strains showed to consume oxygen under aerobic and respiratory conditions. The strain AL5 showed a catalase activity in both growth conditions, while AL3 showed this activity only in respiratory condition. Respiratory condition improved their tolerance to oxidative compounds (hydrogen peroxide and ROS generators) and further they showed promising probiotic features. The exploration of respiratory competent phenotypes with probiotic features may be extremely useful for the development of competitive starter or probiotic cultures.
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Affiliation(s)
- Diamante Maresca
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
| | - Teresa Zotta
- Institute of Food Science, National Research Council, Avellino, Italy
| | - Gianluigi Mauriello
- Department of Agricultural Sciences, University of Naples Federico II, Portici, Italy
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da Silva Sabo S, Pérez-Rodríguez N, Domínguez JM, de Souza Oliveira RP. Inhibitory substances production by Lactobacillus plantarum ST16Pa cultured in hydrolyzed cheese whey supplemented with soybean flour and their antimicrobial efficiency as biopreservatives on fresh chicken meat. Food Res Int 2017; 99:762-769. [PMID: 28784542 DOI: 10.1016/j.foodres.2017.05.026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/27/2017] [Accepted: 05/27/2017] [Indexed: 10/19/2022]
Abstract
Cheese whey, the main byproduct of the dairy industry, is one of the most worrisome types of industrial waste, not only because of its abundant annual global production but also because it is a notable source of environmental pollution. However, cheese whey can serve as a raw material for the production of biocomposites. In this context, in this study, we assayed the production of a bacteriocin-like inhibitory substance (BLIS) and lactate by culturing Lactobacillus plantarum ST16Pa in hydrolyzed fresh cheese whey. The process was improved by studying the enzymatic hydrolysis of cheese whey as well as its supplementation with soybean flour under microaerophilic or anaerobic conditions. Thus, the highest values of BLIS (7367.23 arbitrary units [AU]/mL) and lactate yield (Ylactate/lactose=1.39g/g) were achieved after addition of 10g/L soybean flour in microaerophilia. These conditions were successfully scaled up in a bioreactor because during complete anaerobiosis at 150rpm, L. plantarum ST16Pa attained considerable cell growth (3.14g/L), lactate concentration (14.33g/L), and BLIS activity (8082.56AU/mL). In addition, the cell-free supernatant resulting from this bioprocess showed high biopreservative efficiency in chicken breast fillets artificially contaminated with Enterococcus faecium 711 during 7days of refrigerated storage, thus indicating the potential use of this BLIS as a biopreservative in the food industry.
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Affiliation(s)
- Sabrina da Silva Sabo
- Department of Biochemical and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Noelia Pérez-Rodríguez
- Chemical Engineering Department, Sciences Faculty, University of Vigo (Ourense Campus), Ourense, Spain
| | - José Manuel Domínguez
- Chemical Engineering Department, Sciences Faculty, University of Vigo (Ourense Campus), Ourense, Spain
| | - Ricardo Pinheiro de Souza Oliveira
- Department of Biochemical and Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil.
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34
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D'Angelo L, Cicotello J, Zago M, Guglielmotti D, Quiberoni A, Suárez V. Leuconostoc strains isolated from dairy products: Response against food stress conditions. Food Microbiol 2017; 66:28-39. [PMID: 28576370 DOI: 10.1016/j.fm.2017.04.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Revised: 02/24/2017] [Accepted: 04/02/2017] [Indexed: 11/29/2022]
Abstract
A systematic study about the intrinsic resistance of 29 strains (26 autochthonous and 3 commercial ones), belonging to Leuconostoc genus, against diverse stress factors (thermal, acidic, alkaline, osmotic and oxidative) commonly present at industrial or conservation processes were evaluated. Exhaustive result processing was made by applying one-way ANOVA, Student's test (t), multivariate analysis by Principal Component Analysis (PCA) and Matrix Hierarchical Cluster Analysis. In addition, heat adaptation on 4 strains carefully selected based on previous data analysis was assayed. The strains revealed wide diversity of resistance to stress factors and, in general, a clear relationship between resistance and Leuconostoc species was established. In this sense, the highest resistance was shown by Leuconostoc lactis followed by Leuconostoc mesenteroides strains, while Leuconostoc pseudomesenteroides and Leuconostoc citreum strains revealed the lowest resistance to the stress factors applied. Heat adaptation improved thermal cell survival and resulted in a cross-resistance against the acidic factor. However, all adapted cells showed diminished their oxidative resistance. According to our knowledge, this is the first study regarding response of Leuconostoc strains against technological stress factors and could establish the basis for the selection of "more robust" strains and propose the possibility of improving their performance during industrial processes.
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Affiliation(s)
- Luisa D'Angelo
- Instituto de Lactología Industrial (Universidad Nacional del Litoral - Consejo Nacional de Investigaciones Científicas y Técnicas), Facultad de Ingeniería Química, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina
| | - Joaquín Cicotello
- Instituto de Lactología Industrial (Universidad Nacional del Litoral - Consejo Nacional de Investigaciones Científicas y Técnicas), Facultad de Ingeniería Química, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina
| | - Miriam Zago
- Consiglio per la Ricerca in Agricoltura e l'Analisi dell'Economia Agraria, Centro di Ricerca per le Produzioni Foraggere e Lattiero Casearie (CREA-FLC), Via Lombardo 11, 26900 Lodi, Italy
| | - Daniela Guglielmotti
- Instituto de Lactología Industrial (Universidad Nacional del Litoral - Consejo Nacional de Investigaciones Científicas y Técnicas), Facultad de Ingeniería Química, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina
| | - Andrea Quiberoni
- Instituto de Lactología Industrial (Universidad Nacional del Litoral - Consejo Nacional de Investigaciones Científicas y Técnicas), Facultad de Ingeniería Química, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina
| | - Viviana Suárez
- Instituto de Lactología Industrial (Universidad Nacional del Litoral - Consejo Nacional de Investigaciones Científicas y Técnicas), Facultad de Ingeniería Química, Santiago del Estero 2829, S3000AOM Santa Fe, Argentina.
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35
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Generation of Lactobacillus plantarum strains with improved potential to target gastrointestinal disorders related to sugar malabsorption. Food Res Int 2017; 94:45-53. [DOI: 10.1016/j.foodres.2017.01.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 01/06/2017] [Accepted: 01/25/2017] [Indexed: 12/14/2022]
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36
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Zotta T, Parente E, Ricciardi A. Aerobic metabolism in the genusLactobacillus: impact on stress response and potential applications in the food industry. J Appl Microbiol 2017; 122:857-869. [DOI: 10.1111/jam.13399] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 12/07/2016] [Accepted: 01/04/2017] [Indexed: 12/13/2022]
Affiliation(s)
- T. Zotta
- Istituto di Scienze dell'Alimentazione-CNR; Avellino Italy
| | - E. Parente
- Dipartimento di Scienze; Università degli Studi della Basilicata; Potenza Italy
| | - A. Ricciardi
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali; Università degli Studi della Basilicata; Potenza Italy
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Zotta T, Tabanelli G, Montanari C, Ianniello R, Parente E, Gardini F, Ricciardi A. Tween 80 and respiratory growth affect metabolite production and membrane fatty acids inLactobacillus caseiN87. J Appl Microbiol 2017; 122:759-769. [DOI: 10.1111/jam.13373] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2016] [Revised: 11/08/2016] [Accepted: 12/05/2016] [Indexed: 12/28/2022]
Affiliation(s)
- T. Zotta
- Istituto di Scienze dell'Alimentazione-CNR; Avellino Italy
| | - G. Tabanelli
- Centro Interdipartimentale di Ricerca Industriale Agroalimentare; Università degli Studi di Bologna; Sede di Cesena Italy
| | - C. Montanari
- Centro Interdipartimentale di Ricerca Industriale Agroalimentare; Università degli Studi di Bologna; Sede di Cesena Italy
| | - R.G. Ianniello
- Scuola di Scienze Agrarie; Forestali; Alimentari e Ambientali; Università degli Studi della Basilicata; Potenza Italy
| | - E. Parente
- Dipartimento di Scienze; Università degli Studi della Basilicata; Potenza Italy
| | - F. Gardini
- Centro Interdipartimentale di Ricerca Industriale Agroalimentare; Università degli Studi di Bologna; Sede di Cesena Italy
- Dipartimento di Scienze e Tecnologie Agroalimentari; Alma Mater Studiorum; Università degli Studi di Bologna; Cesena Italy
| | - A. Ricciardi
- Scuola di Scienze Agrarie; Forestali; Alimentari e Ambientali; Università degli Studi della Basilicata; Potenza Italy
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De Angelis M, Calasso M, Cavallo N, Di Cagno R, Gobbetti M. Functional proteomics within the genus Lactobacillus. Proteomics 2016; 16:946-62. [PMID: 27001126 DOI: 10.1002/pmic.201500117] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Revised: 11/24/2015] [Accepted: 01/11/2016] [Indexed: 12/13/2022]
Abstract
Lactobacillus are mainly used for the manufacture of fermented dairy, sourdough, meat, and vegetable foods or used as probiotics. Under optimal processing conditions, Lactobacillus strains contribute to food functionality through their enzyme portfolio and the release of metabolites. An extensive genomic diversity analysis was conducted to elucidate the core features of the genus Lactobacillus, and to provide a better comprehension of niche adaptation of the strains. However, proteomics is an indispensable "omics" science to elucidate the proteome diversity, and the mechanisms of regulation and adaptation of Lactobacillus strains. This review focuses on the novel and comprehensive knowledge of functional proteomics and metaproteomics of Lactobacillus species. A large list of proteomic case studies of different Lactobacillus species is provided to illustrate the adaptability of the main metabolic pathways (e.g., carbohydrate transport and metabolism, pyruvate metabolism, proteolytic system, amino acid metabolism, and protein synthesis) to various life conditions. These investigations have highlighted that lactobacilli modulate the level of a complex panel of proteins to growth/survive in different ecological niches. In addition to the general regulation and stress response, specific metabolic pathways can be switched on and off, modifying the behavior of the strains.
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Affiliation(s)
- Maria De Angelis
- Department of Soil, Plant and Food Science, University of Bari Aldo Moro, Bari, Italy
| | - Maria Calasso
- Department of Soil, Plant and Food Science, University of Bari Aldo Moro, Bari, Italy
| | - Noemi Cavallo
- Department of Soil, Plant and Food Science, University of Bari Aldo Moro, Bari, Italy
| | - Raffaella Di Cagno
- Department of Soil, Plant and Food Science, University of Bari Aldo Moro, Bari, Italy
| | - Marco Gobbetti
- Department of Soil, Plant and Food Science, University of Bari Aldo Moro, Bari, Italy
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Reale A, Ianniello RG, Ciocia F, Di Renzo T, Boscaino F, Ricciardi A, Coppola R, Parente E, Zotta T, McSweeney PL. Effect of respirative and catalase-positive Lactobacillus casei adjuncts on the production and quality of Cheddar-type cheese. Int Dairy J 2016. [DOI: 10.1016/j.idairyj.2016.08.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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40
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Transcriptomic analysis on the formation of the viable putative non-culturable state of beer-spoilage Lactobacillus acetotolerans. Sci Rep 2016; 6:36753. [PMID: 27819317 PMCID: PMC5098190 DOI: 10.1038/srep36753] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 10/20/2016] [Indexed: 02/08/2023] Open
Abstract
Lactic acid bacteria (LAB) are the most common beer-spoilage bacteria regardless of beer type, and thus pose significant problems for the brewery industry. The aim of this study was to investigate the genetic mechanisms involved in the ability of the hard-to-culture beer-spoilage bacterium Lactobacillus acetotolerans to enter into the viable putative non-culturable (VPNC) state. A genome-wide transcriptional analysis of beer-spoilage L. acetotolerans strains BM-LA14526, BM-LA14527, and BM-LA14528 under normal, mid-term and VPNC states were performed using RNA-sequencing (RNA-seq) and further bioinformatics analyses. GO function, COG category, and KEGG pathway enrichment analysis were conducted to investigate functional and related metabolic pathways of the differentially expressed genes. Functional and pathway enrichment analysis indicated that heightened stress response and reduction in genes associated with transport, metabolic process, and enzyme activity might play important roles in the formation of the VPNC state. This is the first transcriptomic analysis on the formation of the VPNC state of beer spoilage L. acetotolerans.
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Ianniello RG, Zotta T, Matera A, Genovese F, Parente E, Ricciardi A. Investigation of Factors Affecting Aerobic and Respiratory Growth in the Oxygen-Tolerant Strain Lactobacillus casei N87. PLoS One 2016; 11:e0164065. [PMID: 27812097 PMCID: PMC5094797 DOI: 10.1371/journal.pone.0164065] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 09/19/2016] [Indexed: 11/18/2022] Open
Abstract
Aerobic and respiratory cultivations provide benefits for some lactic acid bacteria (LAB). Growth, metabolites, enzymatic activities (lactate dehydrogenase; pyruvate and NADH oxidases, NADH peroxidase; catalase), antioxidant capability and stress tolerance of Lactobacillus casei N87 were evaluated in anaerobic, aerobic and respiratory (aerobiosis with heme and menaquinone supplementation) batch cultivations with different dissolved oxygen (DO) concentrations. The expression of pox (pyruvate oxidase) and cydABCD operon (cytochrome bd oxidase complex) was quantified by quantitative Real Time polymerase chain reaction. Respiration increased biomass production compared to anaerobiosis and unsupplemented aerobiosis, and altered the central metabolism rerouting pyruvate away from lactate accumulation. All enzymatic activities, except lactate dehydrogenase, were higher in respiratory cultures, while unsupplemented aerobiosis with 60% of DO promoted H2O2 and free radical accumulation. Respiration improved the survival to oxidative and freeze-drying stresses, while significant numbers of dead, damaged and viable but not cultivable cells were found in unsupplemented aerobic cultures (60% DO). Analysis of gene expression suggested that the activation of aerobic and respiratory pathways occurred during the exponential growth phase, and that O2 and hemin induced, respectively, the transcription of pox and cydABCD genes. Respiratory cultivation might be a natural strategy to improve functional and technological properties of L. casei.
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Affiliation(s)
- Rocco G. Ianniello
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Teresa Zotta
- Istituto di Scienze dell’Alimentazione-CNR, Avellino, Italy
- * E-mail:
| | - Attilio Matera
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Francesco Genovese
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Eugenio Parente
- Dipartimento di Scienze, Università degli Studi della Basilicata, Potenza, Italy
| | - Annamaria Ricciardi
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
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Reale A, Di Renzo T, Zotta T, Preziuso M, Boscaino F, Ianniello R, Storti LV, Tremonte P, Coppola R. Effect of respirative cultures of Lactobacillus casei on model sourdough fermentation. Lebensm Wiss Technol 2016. [DOI: 10.1016/j.lwt.2016.06.065] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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43
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van den Nieuwboer M, van Hemert S, Claassen E, de Vos WM. Lactobacillus plantarum WCFS1 and its host interaction: a dozen years after the genome. Microb Biotechnol 2016; 9:452-65. [PMID: 27231133 PMCID: PMC4919987 DOI: 10.1111/1751-7915.12368] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 04/25/2016] [Accepted: 04/25/2016] [Indexed: 12/13/2022] Open
Abstract
Lactobacillus plantarum WCFS1 is one of the best studied Lactobacilli, notably as its genome was unravelled over 12 years ago. L. plantarum WCFS1 can be grown to high densities, is amenable to genetic transformation and highly robust with a relatively high survival rate during the gastrointestinal passage. In this review, we present and discuss the main insights provided by the functional genomics research on L. plantarum WCFS1 with specific attention for the molecular mechanisms related to its interaction with the human host and its potential to modify the immune system, and induce other health-related benefits. Whereas most insight has been gained in mouse and other model studies, only five human studies have been reported with L. plantarum WCFS1. Hence NCIMB 8826 (the parental strain of L. plantarum WCFS1) in human trials as to capitalize on the wealth of knowledge that is summarized here.
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Affiliation(s)
| | | | - Eric Claassen
- Athena Institute, Vrije Universiteit, Amsterdam, The Netherlands
- Department of Viroscience, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Willem M de Vos
- Laboratory of Microbiology, Wageningen University, Wageningen, The Netherlands
- Department of Bacteriology & Immunology and Veterinary Biosciences, University of Helsinki, Helsinki, Finland
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44
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The spxB gene as a target to identify Lactobacillus casei group species in cheese. Food Microbiol 2016; 59:57-65. [PMID: 27375244 DOI: 10.1016/j.fm.2016.05.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 03/17/2016] [Accepted: 05/06/2016] [Indexed: 12/17/2022]
Abstract
This study focused on the spxB gene, which encodes for pyruvate oxidase. The presence of spxB in the genome and its transcription could be a way to produce energy and allow bacterial growth during carbohydrate starvation. In addition, the activity of pyruvate oxidase, which produces hydrogen peroxide, could be a mechanism for interspecies competition. Because this gene seems to provide advantages for the encoding species for adaptation in complex ecosystems, we studied spxB in a large set of cheese isolates belonging to the Lactobacillus casei group. Through this study, we demonstrated that this gene is widely found in the genomes of members of the L. casei group and shows variability useful for taxonomic studies. In particular, the HRM analysis method allowed for a specific discrimination between Lactobacillus rhamnosus, Lactobacillus paracasei and L. casei. Regarding the coding region, the spxB functionality in cheese was shown for the first time by real-time PCR, and by exploiting the heterogeneity between the L. casei group species, we identified the bacterial communities encoding the spxB gene in this ecosystem. This study allowed for monitoring of the active bacterial community involved in different stages of ripening by following the POX pathway.
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45
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Zhai Z, An H, Wang G, Luo Y, Hao Y. Functional role of pyruvate kinase from Lactobacillus bulgaricus in acid tolerance and identification of its transcription factor by bacterial one-hybrid. Sci Rep 2015; 5:17024. [PMID: 26581248 PMCID: PMC4652205 DOI: 10.1038/srep17024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 10/23/2015] [Indexed: 12/17/2022] Open
Abstract
Lactobacillus delbrueckii subsp. bulgaricus develops acid tolerance response when subjected to acid stress conditions, such as the induction of enzymes associated with carbohydrate metabolism. In this study, pyk gene encoding pyruvate kinase was over-expressed in heterologous host Lactococcus lactis NZ9000, and SDS-PAGE analysis revealed the successful expression of this gene in NZ9000. The survival rate of Pyk-overproducing strain was 45-fold higher than the control under acid stress condition (pH 4.0). In order to determine the transcription factor (TF) which regulates the expression of pyk by bacterial one-hybrid, we constructed a TF library including 65 TFs of L. bulgaricus. Western blotting indicated that TFs in this library could be successfully expressed in host strains. Subsequently, the promoter of pfk-pyk operon in L. bulgaricus was identified by 5′-RACE PCR. The bait plasmid pH3U3-p01 carrying the deletion fragment of pfk-pyk promoter captured catabolite control protein A (CcpA) which could regulate the expression of pyk by binding to a putative catabolite-responsive element (5′-TGTAAGCCCTAACA-3′) upstream the -35 region. Real-time qPCR analysis revealed the transcription of pyk was positively regulated by CcpA. This is the first report about identifying the TF of pyk in L. bulgaricus, which will provide new insight into the regulatory network.
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Affiliation(s)
- Zhengyuan Zhai
- Key Laboratory of Functional Dairy, Co-constructed by Ministry of Education and Beijing Municipality, College of Food Science &Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Haoran An
- Key Laboratory of Functional Dairy, Co-constructed by Ministry of Education and Beijing Municipality, College of Food Science &Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Guohong Wang
- Key Laboratory of Functional Dairy, Co-constructed by Ministry of Education and Beijing Municipality, College of Food Science &Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yunbo Luo
- Key Laboratory of Functional Dairy, Co-constructed by Ministry of Education and Beijing Municipality, College of Food Science &Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Yanling Hao
- Key Laboratory of Functional Dairy, Co-constructed by Ministry of Education and Beijing Municipality, College of Food Science &Nutritional Engineering, China Agricultural University, Beijing 100083, China
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Li C, Sun JW, Zhang GF, Liu LB. Effect of the absence of the CcpA gene on growth, metabolic production, and stress tolerance in Lactobacillus delbrueckii ssp. bulgaricus. J Dairy Sci 2015; 99:104-11. [PMID: 26585479 DOI: 10.3168/jds.2015-10321] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 09/28/2015] [Indexed: 11/19/2022]
Abstract
The catabolite control protein A (CcpA) is a kind of multi-effect regulatory protein. In the study, the effect of the inactivation of CcpA and aerobic conditions on the growth, metabolic production, and stress tolerance to heat, oxidative, and cold stresses in Lactobacillus delbrueckii ssp. bulgaricus was investigated. Results showed that inactivation of CcpA distinctly hindered growth. Total lactic acid concentration was significantly lower in aerobiosis for both strains and was lower for the mutant strain than L. bulgaricus. Acetic acid production from the mutant strain was higher than L. bulgaricus in aerobiosis compared with anaerobiosis. Enzyme activities, lactate dehydrogenase (LDH), phosphate fructose kinase (PFK), pyruvate kinase (PK), and pyruvic dehydrogenase (PDH), were significantly lower in the mutant strain than L. bulgaricus. The diameters of inhibition zone were 13.59 ± 0.02 mm and 9.76 ± 0.02 mm for L. bulgaricus in anaerobiosis and aerobiosis, respectively; and 8.12 ± 0.02 mm and 7.38 ± 0.02 mm for the mutant in anaerobiosis and aerobiosis, respectively. For both strains, cells grown under aerobic environment possess more stress tolerance. This is the first study in which the CcpA-negative mutant of L. bulgaricus is constructed and the effect of aerobic growth on stress tolerance of L. bulgaricus is evaluated. Although aerobic cultivation does not significantly improve growth, it does improve stress tolerance.
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Affiliation(s)
- C Li
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China 150030
| | - J W Sun
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China 150030
| | - G F Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China 150030
| | - L B Liu
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin, China 150030.
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Transcriptional analysis of exopolysaccharides biosynthesis gene clusters in Lactobacillus plantarum. Arch Microbiol 2015; 198:295-300. [PMID: 26546316 DOI: 10.1007/s00203-015-1169-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 10/15/2015] [Accepted: 10/28/2015] [Indexed: 12/19/2022]
Abstract
Exopolysaccharides (EPS) from lactic acid bacteria contribute to specific rheology and texture of fermented milk products and find applications also in non-dairy foods and in therapeutics. Recently, four clusters of genes (cps) associated with surface polysaccharide production have been identified in Lactobacillus plantarum WCFS1, a probiotic and food-associated lactobacillus. These clusters are involved in cell surface architecture and probably in release and/or exposure of immunomodulating bacterial molecules. Here we show a transcriptional analysis of these clusters. Indeed, RT-PCR experiments revealed that the cps loci are organized in five operons. Moreover, by reverse transcription-qPCR analysis performed on L. plantarum WCFS1 (wild type) and WCFS1-2 (ΔccpA), we demonstrated that expression of three cps clusters is under the control of the global regulator CcpA. These results, together with the identification of putative CcpA target sequences (catabolite responsive element CRE) in the regulatory region of four out of five transcriptional units, strongly suggest for the first time a role of the master regulator CcpA in EPS gene transcription among lactobacilli.
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48
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Growth of Lactobacillus rhamnosus 64 in whey permeate and study of the effect of mild stresses on survival to spray drying. Lebensm Wiss Technol 2015. [DOI: 10.1016/j.lwt.2015.03.066] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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49
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Metabolism of Fructooligosaccharides in Lactobacillus plantarum ST-III via Differential Gene Transcription and Alteration of Cell Membrane Fluidity. Appl Environ Microbiol 2015; 81:7697-707. [PMID: 26319882 DOI: 10.1128/aem.02426-15] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Accepted: 08/21/2015] [Indexed: 12/20/2022] Open
Abstract
Although fructooligosaccharides (FOS) can selectively stimulate the growth and activity of probiotics and beneficially modulate the balance of intestinal microbiota, knowledge of the molecular mechanism for FOS metabolism by probiotics is still limited. Here a combined transcriptomic and physiological approach was used to survey the global alterations that occurred during the logarithmic growth of Lactobacillus plantarum ST-III using FOS or glucose as the sole carbon source. A total of 363 genes were differentially transcribed; in particular, two gene clusters were induced by FOS. Gene inactivation revealed that both of the clusters participated in the metabolism of FOS, which were transported across the membrane by two phosphotransferase systems (PTSs) and were subsequently hydrolyzed by a β-fructofuranosidase (SacA) in the cytoplasm. Combining the measurements of the transcriptome- and membrane-related features, we discovered that the genes involved in the biosynthesis of fatty acids (FAs) were repressed in cells grown on FOS; as a result, the FA profiles were altered by shortening of the carbon chains, after which membrane fluidity increased in response to FOS transport and utilization. Furthermore, incremental production of acetate was observed in both the transcriptomic and the metabolic experiments. Our results provided new insights into gene transcription, the production of metabolites, and membrane alterations that could explain FOS metabolism in L. plantarum.
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50
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Ricciardi A, Ianniello R, Parente E, Zotta T. Modified chemically defined medium for enhanced respiratory growth ofLactobacillus caseiandLactobacillus plantarumgroups. J Appl Microbiol 2015; 119:776-85. [DOI: 10.1111/jam.12894] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Revised: 05/27/2015] [Accepted: 06/20/2015] [Indexed: 11/29/2022]
Affiliation(s)
- A. Ricciardi
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali; Università degli Studi della Basilicata; Potenza Italy
| | - R.G. Ianniello
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali; Università degli Studi della Basilicata; Potenza Italy
| | - E. Parente
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali; Università degli Studi della Basilicata; Potenza Italy
- Istituto di Scienze dell'Alimentazione-CNR; Avellino Italy
| | - T. Zotta
- Istituto di Scienze dell'Alimentazione-CNR; Avellino Italy
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