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Abriouel H, Caballero Gómez N, Manetsberger J, Benomar N. Dual effects of a bacteriocin-producing Lactiplantibacillus pentosus CF-6HA, isolated from fermented aloreña table olives, as potential probiotic and antimicrobial agent. Heliyon 2024; 10:e28408. [PMID: 38560111 PMCID: PMC10981101 DOI: 10.1016/j.heliyon.2024.e28408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2023] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 04/04/2024] Open
Abstract
The probiotic potential of Lactiplantibacillus pentosus CF-6HA isolated from traditionally fermented Aloreña table olives was analyzed in vitro and in silico. Results obtained suggested that this strain can be catalogued as "talented" bacterium exhibiting bacteriocin production with antimicrobial activity against human/animal and plant pathogens, such as Pseudomonas syringae and Verticillium dahliae. The robustness, safety and probiotic potential of L. pentosus CF-6HA was confirmed by in silico analysis. In addition, a plethora of coding genes for defense and adaptability to different life styles besides functional properties were identified. In this sense, defense mechanisms of L. pentosus CF-6HA consist of 17 ISI elements, 98 transposases and 13 temperate phage regions as well as a CRISPR (clustered regularly interspaced short palindromic repeats)/cas system. Moreover, the functionality of this strain was confirmed by the presence of genes coding for secondary metabolites, exopolysaccharides and other bioactive molecules. Finally, we demonstrated the ability of L. pentosus CF-6HA to biotransform selenite to nanoparticles (SeNPs) highlighting its potential role in selenium bioremediation to be exploited in foods, agriculture and the environment; but also for the bio-enrichment of fermented foods with selenium.
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Affiliation(s)
- Hikmate Abriouel
- Área de Microbiología, Departamento de Ciencias de La Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
| | - Natacha Caballero Gómez
- Área de Microbiología, Departamento de Ciencias de La Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
| | - Julia Manetsberger
- Área de Microbiología, Departamento de Ciencias de La Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
| | - Nabil Benomar
- Área de Microbiología, Departamento de Ciencias de La Salud, Facultad de Ciencias Experimentales, Universidad de Jaén, 23071-Jaén, Spain
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Onur M, Önlü H. Isolation, characterization of Weissella confusa and Lactococcus lactis from different milk sources and determination of probiotic features. Braz J Microbiol 2024; 55:663-679. [PMID: 38158467 PMCID: PMC10920558 DOI: 10.1007/s42770-023-01208-7] [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: 09/23/2022] [Accepted: 12/02/2023] [Indexed: 01/03/2024] Open
Abstract
This study aimed to investigate the probiotic properties of Lactic Acid Bacteria (LAB) isolates derived from various milk sources. These isolates identified based on their morphological characteristics and 16S rRNA gene sequencing. Four strains of Lactococcus lactis and two strains of Weissella confusa were identified with over 96% 16S rRNA gene similarity according to the NCBI-BLAST results. The survival of the isolates was determined in low pH, pepsin, bile salts, and pancreatin, and their adhesion ability was assessed by in vitro cell adhesion assay, hydrophobicity, auto- and co-aggregation, and safety criteria were determined by hemolytic, gelatinase activities, and DNAse production ability tests. The results showed that the LAB isolates had different levels of resistance to various stress factors. L. lactis subsp. cremoris MH31 showed the highest resistance to bile salt, while the highest pH resistance was observed in L. lactis MH31 at pH 3.0. All the isolates survived in pepsin exposure at pH 3.0 for 3 h. The auto-aggregation test results showed that all strains exhibited auto-aggregation ranging from 84.9 to 91.4%. Co-aggregation percentage ranged from 19 - 54% and 17 - 57% against Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 29213, respectively. The hydrophobicity capacity of the LAB isolated ranged from 35-61%. These isolates showed different adhesion abilities to Caco-2 cells (81.5% to 92.6%). None of the isolates exhibited DNase, gelatinase and hemolytic activity (γ-hemolysis). All results indicate that these LAB strains have the potential to be used as probiotics.
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Affiliation(s)
- Melda Onur
- Ministry of Agriculture and Forestry, Istanbul, Türkiye
| | - Harun Önlü
- Department of Food Processing, Vocational School of Technical Sciences, Muş Alparslan University, Muş, Türkiye.
- Department of Molecular Biology and Genetics, Muş Alparslan University, Muş, Türkiye.
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Li H, Chen C, Li Y, Li Z, Li C, Luan C. Antioxidant Effects and Probiotic Properties of Latilactobacillus sakei MS103 Isolated from Sweet Pickled Garlic. Foods 2023; 12:4276. [PMID: 38231756 DOI: 10.3390/foods12234276] [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: 11/09/2023] [Revised: 11/21/2023] [Accepted: 11/25/2023] [Indexed: 01/19/2024] Open
Abstract
Fermented vegetable-based foods, renowned for their unique flavors and human health benefits, contain probiotic organisms with reported in vitro antioxidative effects. This study investigates the probiotic properties of Latilactobacillus sakei MS103 (L. sakei MS103) and its antioxidant activities using an in vitro oxidative stress model based on the hydrogen peroxide (H2O2)-induced oxidative damage of RAW 264.7 cells. L. sakei MS103 exhibited tolerance to extreme conditions (bile salts, low pH, lysozyme, H2O2), antibiotic sensitivity, and auto-aggregation ability. Moreover, L. sakei MS103 co-aggregated with pathogenic Porphyromonas gingivalis cells, inhibited P. gingivalis-induced biofilm formation, and exhibited robust hydrophobic and electrostatic properties that enabled it to strongly bind to gingival epithelial cells and HT-29 cells for enhanced antioxidant effects. Additionally, L. sakei MS103 exhibited other antioxidant properties, including ion-chelating capability and the ability to effectively scavenge superoxide anion free radicals, hydroxyl, 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid, and 2,2-diphenyl-1-picrylhydrazyl. Furthermore, the addition of live or heat-killed L. sakei MS103 cells to H2O2-exposed RAW 264.7 cells alleviated oxidative stress, as reflected by reduced malondialdehyde levels, increased glutathione levels, and the up-regulated expression of four antioxidant-related genes (gshR2, gshR4, Gpx, and npx). These findings highlight L. sakei MS103 as a potential probiotic capable of inhibiting activities of P. gingivalis pathogenic bacteria and mitigating oxidative stress.
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Affiliation(s)
- Heng Li
- College of Information Technology, Jilin Agricultural University, Chuangchun 130118, China
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun 130012, China
| | - Changlin Chen
- College of Information Technology, Jilin Agricultural University, Chuangchun 130118, China
| | - Yuanxin Li
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun 130012, China
| | - Zhengqiang Li
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun 130012, China
| | - Chen Li
- State Key Laboratory for Zoonotic Diseases, Key Laboratory for Zoonosis Research of the Ministry of Education, Institute of Zoonosis, College of Veterinary Medicine, Jilin University, Changchun 130062, China
| | - Chang Luan
- Key Laboratory for Molecular Enzymology and Engineering of the Ministry of Education, College of Life Sciences, Jilin University, Changchun 130012, China
- State Key Laboratory of Black Soils Conservation and Utilization, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China
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Staniszewski A, Kordowska-Wiater M. Probiotic Yeasts and How to Find Them-Polish Wines of Spontaneous Fermentation as Source for Potentially Probiotic Yeasts. Foods 2023; 12:3392. [PMID: 37761101 PMCID: PMC10529123 DOI: 10.3390/foods12183392] [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: 08/02/2023] [Revised: 08/28/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023] Open
Abstract
One approach towards maintaining healthy microbiota in the human gastrointestinal tract is through the consumption of probiotics. Until now, the majority of probiotic research has focused on probiotic bacteria, but over the last few years more and more studies have demonstrated the probiotic properties of yeast, and also of species besides the well-studied Saccharomyces cerevisiae var. boulardii. Probiotic strains have to present the ability to survive in harsh conditions of the host body, like the digestive tract. Must fermentation might be an example of a similar harsh environment. In the presented study, we examined the probiotic potential of 44 yeast strains isolated from Polish wines. The tested isolates belonged to six species: Hanseniaspora uvarum, Pichia kluyveri, Metschnikowia pulcherrima, Metschnikowia ziziphicola, Saccharomyces cerevisiae and Starmerella bacillaris. The tested strains were subjected to an assessment of probiotic properties, their safety and their other properties, such as enzymatic activity or antioxidant properties, in order to assess their potential usefulness as probiotic yeast candidates. Within the most promising strains were representatives of three species: H. uvarum, M. pulcherrima and S. cerevisiae. H. uvarum strains 15 and 16, as well as S. cerevisiae strain 37, showed, among other features, survivability in gastrointestinal tract conditions exceeding 100%, high hydrophobicity and autoaggregation, had no hemolytic activity and did not produce biogenic amines. The obtained results show that Polish wines might be a source of potential probiotic yeast candidates with perspectives for further research.
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Affiliation(s)
| | - Monika Kordowska-Wiater
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, Skromna 8, 20-704 Lublin, Poland;
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Park SK, Jin H, Song NE, Baik SH. Probiotic Properties of Pediococcus pentosaceus JBCC 106 and Its Lactic Acid Fermentation on Broccoli Juice. Microorganisms 2023; 11:1920. [PMID: 37630480 PMCID: PMC10456906 DOI: 10.3390/microorganisms11081920] [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: 06/26/2023] [Revised: 07/20/2023] [Accepted: 07/25/2023] [Indexed: 08/27/2023] Open
Abstract
To understand the biological roles of Pediococcus pentosaceus strains as probiotics isolated from the traditional Korean fermented food, Jangajji, Pediococcus pentosaceus was selected based on its high cinnamoyl esterase (CE) and antioxidant activities. The acid and bile stability, intestinal adhesion, antagonistic activity against human pathogens, cholesterol-lowering effects, and immune system stimulation without inflammatory effects were evaluated. Nitric oxide (NO) levels were measured in co-culture with various bacterial stimulants. Fermentation ability was measured by using a broccoli matrix and the sulforaphane levels were measured. Resistance to acidic and bilious conditions and 8% adherence to Caco-2 cells were observed. Cholesterol levels were lowered by 51% by assimilation. Moreover, these strains exhibited immunomodulatory properties with induction of macrophage TNF-α and IL-6 and had microstatic effects on various pathogens. Co-culture with various bacterial stimulants resulted in increased NO production. Fermentation activity was increased with the strains, and higher sulforaphane levels were observed. Therefore, in the future, the applicability of the selected strain to broccoli matrix-based fermented functional foods should be confirmed.
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Affiliation(s)
| | | | | | - Sang-Ho Baik
- Department of Food Science and Human Nutrition, Jeonbuk National University, Jeonju 54896, Republic of Korea; (S.-K.P.); (H.J.); (N.-E.S.)
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Shahverdi S, Barzegari AA, Vaseghi Bakhshayesh R, Nami Y. In-vitro and in-vivo antibacterial activity of potential probiotic Lactobacillus paracasei against Staphylococcus aureus and Escherichia coli. Heliyon 2023; 9:e14641. [PMID: 37035350 PMCID: PMC10073747 DOI: 10.1016/j.heliyon.2023.e14641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 03/11/2023] [Accepted: 03/14/2023] [Indexed: 03/22/2023] Open
Abstract
Previous studies documented that Lactobacillus paracasei has obvious in vitro cholesterol-lowering abilities. In this study, initially, L. paracasei was tested in terms of antibacterial properties as well as antibiogram profile. Then, the safety of the mentioned strain was evaluated in rats. Evaluation of antibiotic susceptibility revealed that the L. paracasei strain had high antibiotic resistance to several antibiotics as well as a great ability to autoaggregation. After identification of the probiotic aptitude, six groups of six rats from both sexes were used (three groups of each sex). L. paracasei was administered to the experimental groups via drinking water for 28 days (1 × 108 and 1 × 109, respectively). The negative control group received only tap water during this period. Hematological indicators, serum liver enzyme activity including (alanine transaminase (ALT), alkaline phosphatase (ALP), and aspartate transaminase (AST)) as well as serum creatinine and urea were evaluated at the end of 28 days. The blood and serum factors were not changed significantly during the 28 days. The only noticeable difference was the increase of blood urea in both sexes which was in a normal range. Furthermore, the evaluation of antagonistic properties revealed that L. paracasei had antibacterial aptitude against Escherichia coli and Staphylococcus aureus. In conclusion, this strain has good cholesterol-lowering and antibacterial properties and is a safe supplement in Wistar rats.
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Affiliation(s)
- Shadi Shahverdi
- Department of Biology, University of Maragheh, Maragheh, East Azerbaijan, Iran
| | - Amir Abbas Barzegari
- Department of Biology, University of Maragheh, Maragheh, East Azerbaijan, Iran
- Corresponding author.
| | - Reza Vaseghi Bakhshayesh
- Department of Food Bioprocess Engineering, Branch for Northwest & West Region, Agricultural Biotechnology Research, Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Tabriz, Iran
| | - Yousef Nami
- Department of Food Bioprocess Engineering, Branch for Northwest & West Region, Agricultural Biotechnology Research, Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Tabriz, Iran
- Corresponding author.
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Kamilari E, Anagnostopoulos DA, Tsaltas D. Fermented table olives from Cyprus: Microbiota profile of three varieties from different regions through metabarcoding sequencing. Front Microbiol 2023; 13:1101515. [PMID: 36733778 PMCID: PMC9886855 DOI: 10.3389/fmicb.2022.1101515] [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: 11/17/2022] [Accepted: 12/29/2022] [Indexed: 01/18/2023] Open
Abstract
The knowledge about the microbial diversity of different olives varieties from diverse regions in the Mediterranean basin is limited. This work aimed to determine the microbial diversity of three different fermented olive varieties, collected from different regions in Cyprus, via Next Generation Sequencing (NGS) analysis. Olives were spontaneously fermented for 120 days, microbial DNA was extracted from the final products, and subjected to 16S rRNA gene and ITS1 loci metabarcoding analysis for the determination of bacterial and fungal communities, respectively. Results revealed that the bacterial profile of the studied varieties was similar, while no noteworthy differences were observed in olives from different regions. The bacterial profile was dominated by the co-existence of Lactobacillus and Streptococcus, while the genera Lactococcus and Salinivibrio and the family Leuconostocaceae were also present in increased relative abundances. Regarding fungal communities, the analysis indicated discrimination among the different varieties, especially in Kalamata ones. The most abundant fungi were mainly the genera Aspergillus, Botryosphaeria, Meyerozyma, and Zygosaccharomyces for Cypriot olives, the genera Botryosphaeria, Saccharomyces, Geosmithia, and Wickeromyces for Kalamata variety, while the dominant fungi in the Picual variety were mainly members of the genera Candida, Penicillium, Saccharomyces, Hanseniospora and Botryosphaeria. Potential microbial biomarkers that distinguish the three varieties are also proposed. Moreover, interaction networks analysis identified interactions among the key taxa of the communities. Overall, the present work provides useful information and sheds light on an understudied field, such as the comparison of microbiota profiles of different varieties from several regions in Cyprus. The study enriches our knowledge and highlights the similarities and the main differences between those aspects, booming in parallel the need for further works on this frontier, in the attempt to determine potentially olives' microbial terroir in Cyprus. Our work should be used as a benchmark for future works in this direction.
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Dehghani S, Edalatian Dovom MR, Yavarmanesh M, Sankian M. In vitro Evaluation of Potential Probiotic Characteristics and Survival of Human and Foodborne Lactic Acid Bacteria (Lacticaseibacillus rhamnosus and Lactiplantibacillus plantarum) in Mice Gastrointestinal Tract. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s0003683822100052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
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9
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Maoloni A, Cardinali F, Milanovic V, Osimani A, Garofalo C, Ferrocino I, Corvaglia MR, Cocolin L, Aquilanti L. Microbial dynamics and key sensory traits of laboratory-scale co-fermented green olives (Olea europaea L. cv. Ascolana tenera) and sea fennel (Crithmum maritimum L.). FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.102077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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10
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Study of Lactic Acid Bacteria Biodiversity in Fermented Cobrançosa Table Olives to Determine Their Probiotic Potential. Foods 2022; 11:foods11193050. [PMID: 36230126 PMCID: PMC9563300 DOI: 10.3390/foods11193050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/08/2022] [Accepted: 09/28/2022] [Indexed: 11/24/2022] Open
Abstract
Current market trends point at increasing demand for functional foods, namely those carrying probiotics. In the case of table olives, presence of probiotics would convey a competitive advantage to Mediterranean-based diets, already established for their cultural heritage and gastronomic character. This work assessed the safety and resistance to gastrointestinal digestion of 19 native LAB strains from Cobrançosa table olives. Strains were identified via molecular sequencing (4 fingerprints/10 strains for Lactiplantibacillus pentosus, and 2 fingerprints/9 strains for L. paraplantarum), and exposed to simulated gastrointestinal fluids, as per the INFOGEST in vitro protocol with modifications. None of those strains proved dangerous for human consumption. Survivability to the gastrointestinal resistance test ranged from 29% to 70%, with strain-dependent variability. L. paraplantarum i18, i27, and i102, and L. pentosus i10 and i11 exhibited statistically lower survival rates (29−35%) than probiotic the Greek table olive reference strain L. pentosus B281 (53%). Among the other strains, L. paraplantarum i101 and L. pentosus i53 and i106 showed the highest survival rates but were not significantly different from the strain of Lacticaseibacillus casei isolated from commercial probiotic yoghurt (65−70%). In vitro results proved that strains retrieved from fermenting cultivar Cobrançosa possess the potential to be claimed as probiotics—thus deserving further attention toward the development of a specific starter culture.
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Leuconostoc mesenteroides LVBH107 Antibacterial Activity against Porphyromonas gingivalis and Anti-Inflammatory Activity against P. gingivalis Lipopolysaccharide-Stimulated RAW 264.7 Cells. Nutrients 2022; 14:nu14132584. [PMID: 35807773 PMCID: PMC9268581 DOI: 10.3390/nu14132584] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 06/18/2022] [Accepted: 06/20/2022] [Indexed: 12/10/2022] Open
Abstract
Probiotics, active microorganisms benefiting human health, currently serve as nutritional supplements and clinical treatments. Periodontitis, a chronic infectious oral disease caused by Porphyromonas gingivalis (P. gingivalis), activates the host immune response to release numerous proinflammatory cytokines. Here, we aimed to clarify Leuconostoc mesenterica (L. mesenteroides) LVBH107 probiotic effects based on the inhibition of P.gingivalis activities while also evaluating the effectiveness of an in vitro P.gingivalis lipopolysaccharide-stimulated RAW 264.7 cell-based inflammation mode. L. mesenteroides LVBH107 survived at acid, bile salts, lysozyme, and hydrogen peroxide conditions, auto-aggregated and co-aggregated with P. gingivalis, exhibited strong hydrophobicity and electrostatic action, and strongly adhered to gingival epithelial and HT-29 cells (thus exhibiting oral tissue adherence and colonization abilities). Moreover, L.mesenteroides LVBH107 exhibited sensitivity to antibiotics erythromycin, doxycycline, minocycline, ampicillin, and others (thus indicating it lacked antibiotic resistance plasmids), effectively inhibited P.gingivalis biofilm formation and inflammation (in vitro inflammation model), reduced the secretion of pro-inflammatory cytokines (TNF-α, IL-6 and IL-1β) and inflammatory mediators (NO and PGE2), and decreased the expression levels of inflammation related genes. Thus, L.mesenterica LVBH107 holds promise as a probiotic that can inhibit P.gingivalis biofilm formation and exert anti-inflammatory activity to maintain oral health.
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Peng X, Ed-Dra A, Yue M. Whole genome sequencing for the risk assessment of probiotic lactic acid bacteria. Crit Rev Food Sci Nutr 2022; 63:11244-11262. [PMID: 35694810 DOI: 10.1080/10408398.2022.2087174] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Probiotic bacteria exhibit beneficial effects on human and/or animal health, and have been widely used in foods and fermented products for decades. Most probiotics consist of lactic acid bacteria (LAB), which are used in the production of various food products but have also been shown to have the ability to prevent certain diseases. With the expansion of applications for probiotic LAB, there is an increasing concern with regard to safety, as cases with adverse effects, i.e., severe infections, transfer of antimicrobial resistance genes, etc., can occur. Currently, in vitro assays remain the primary way to assess the properties of LAB. However, such methodologies are not meeting the needs of strain risk assessment on a high-throughput scale, in the context of the evolving concept of food safety. Analyzing the complete genetic information, including potential virulence genes and other determinants with a negative impact on health, allows for assessing the safe use of the product, for which whole-genome sequencing (WGS) of individual LAB strains can be employed. Genomic data can also be used to understand subtle differences in the strain level important for beneficial effects, or protect patents. Here, we propose that WGS-based bioinformatics analyses are an ideal and cost-effective approach for the initial in silico microbial risk evaluation, while the technique may also increase our understanding of LAB strains for food safety and probiotic property evaluation.
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Affiliation(s)
- Xianqi Peng
- Department of Veterinary Medicine & Institute of Preventive Veterinary Sciences, College of Animal Sciences, Zhejiang University, Hangzhou, China
| | | | - Min Yue
- Department of Veterinary Medicine & Institute of Preventive Veterinary Sciences, College of Animal Sciences, Zhejiang University, Hangzhou, China
- Hainan Institute of Zhejiang University, Sanya, China
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, National Medical Center for Infectious Diseases, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
- Zhejiang Provincial Key Laboratory of Preventive Veterinary Medicine, Hangzhou, China
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Wang J, Wu Z, Wang S, Wang X, Zhang D, Wang Q, Lin L, Wang G, Guo Z, Chen Y. Inhibitory effect of probiotic Bacillus spp. isolated from the digestive tract of Rhynchocypris Lagowskii on the adhesion of common pathogenic bacteria in the intestinal model. Microb Pathog 2022; 169:105623. [PMID: 35691482 DOI: 10.1016/j.micpath.2022.105623] [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: 03/01/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 11/30/2022]
Abstract
Diseases of fish caused by pathogenic bacteria are an important constraint on aquaculture production. Antibiotics have been widely used to control infectious diseases, but this has led to the emergence of drug-resistant bacteria and affected human health. In this context, probiotics are used as an alternative to antibiotics for the prevention and control of diseases in aquaculture. The aim of this study was to obtain probiotic candidate strains of Bacillus spp. from the gut of Rhynchocypris Lagowskii. Strains were screened by enzyme-producing ability, antagonism assay and antibiotic susceptibility. The safety of the strains to host fish has also been established. The isolated Bacillus licheniformis (LSG1-1) and Bacillus subtilis (LSG2-1) were characterized and performed well in tolerance experiments. In addition, LSG1-1 and LSG2-1 were detected to have higher self-aggregation ability and surface hydrophobicity. In the in vitro adhesion model, LSG1-1 and LSG2-1 showed good adhesion ability and had obvious adhesion inhibitory effect on three pathogens of Aeromonas. Based on the characteristics observed so far, Bacillus licheniformis LSG1-1 and Bacillus subtilis LSG2-1 could form potential probiotic candidates in the digestive tract of R. lagowskii to help combat diseases in aquaculture.
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Affiliation(s)
- Jiajing Wang
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China
| | - Zhenchao Wu
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China
| | - Seng Wang
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China
| | - Xin Wang
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China
| | - Dongming Zhang
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China
| | - Qiuju Wang
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China
| | - Lili Lin
- Fisheries Technology Promotion Station of Jilin Province, Changchun, 130012, China
| | - Guiqin Wang
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China
| | - Zhixin Guo
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China; College of Life Sciences, Tonghua Normal University, Tonghua, 134001, China
| | - Yuke Chen
- College of Animal Science and Technology, Jilin Provincial Key Laboratory of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun, 130118, China.
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14
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Ma WJ, Zhao MN, Lu ZX, Lv FX, Zhang P, Bie XM. Isolation of Lactic Acid Bacteria from Yogurt and the Effect on the Intestinal Microflora in Mice. BIOL BULL+ 2022. [DOI: 10.1134/s1062359022130118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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15
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Luan C, Jiang N, Zhou X, Zhang C, Zhao Y, Li Z, Li C. Antibacterial and anti-biofilm activities of probiotic Lactobacillus curvatus BSF206 and Pediococcus pentosaceus AC1-2 against Streptococcus mutans. Microb Pathog 2022; 164:105446. [DOI: 10.1016/j.micpath.2022.105446] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 02/08/2022] [Accepted: 02/08/2022] [Indexed: 12/01/2022]
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Anagnostopoulos DA, Tsaltas D. Current Status, Recent Advances, and Main Challenges on Table Olive Fermentation: The Present Meets the Future. Front Microbiol 2022; 12:797295. [PMID: 35095807 PMCID: PMC8793684 DOI: 10.3389/fmicb.2021.797295] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 12/01/2021] [Indexed: 01/18/2023] Open
Abstract
Table olives are among the most well-known fermented foods, being a vital part of the Mediterranean pyramid diet. They constitute a noteworthy economic factor for the producing countries since both their production and consumption are exponentially increasing year by year, worldwide. Despite its significance, olive’s processing is still craft based, not changed since antiquity, leading to the production of an unstable final product with potential risk concerns, especially related to deterioration. However, based on industrial needs and market demands for reproducible, safe, and healthy products, the modernization of olive fermentation processing is the most important challenge of the current decade. In this sense, the reduction of sodium content and more importantly the use of suitable starter cultures, exhibiting both technological and potential probiotic features, to drive the process may extremely contribute to this need. Prior, to achieve in this effort, the full understanding of table olive microbial ecology during fermentation, including an in-depth determination of microbiota presence and/or dominance and its functionality (genes responsible for metabolite production) that shape the sensorial characteristics of the final product, is a pre-requisite. The advent of meta-omics technology could provide a thorough study of this complex ecosystem, opening in parallel new insights in the field, such as the concept of microbial terroir. Herein, we provide an updated overview in the field of olive fermentation, pointing out some important challenges/perspectives that could be the key to the olive sector’s advancement and modernization.
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Affiliation(s)
- Dimitrios A Anagnostopoulos
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol, Cyprus
| | - Dimitrios Tsaltas
- Department of Agricultural Sciences, Biotechnology and Food Science, Cyprus University of Technology, Limassol, Cyprus
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17
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Falfán-Cortés RN, Mora-Peñaflor N, Gómez-Aldapa CA, Rangel-Vargas E, Acevedo-Sandoval OA, Franco-Fernández MJ, Castro-Rosas J. Characterization and Evaluation of the Probiotic Potential In Vitro and In Situ of Lacticaseibacillus paracasei Isolated from Tenate Cheese. J Food Prot 2022; 85:112-121. [PMID: 34324685 DOI: 10.4315/jfp-21-021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Accepted: 07/21/2021] [Indexed: 11/11/2022]
Abstract
ABSTRACT The objectives of this investigation were (i) to isolate bacteria from various foods (dairy products, fruits, and vegetables) and evaluate their probiotic potential and (ii) to select, identify, and characterize the bacterial strain(s) with the highest probiotic potential. From 14 food samples, 117 bacterial strains were isolated; however, only 42 (T1 to T42) had the correct characteristics (gram positive, coccoid, and bacilliform) and were catalase and oxidase negative to be considered presumptive lactic acid bacteria (LAB). The antagonistic activity of the 42 strains was evaluated against Escherichia coli (O157:H7E09), Listeria monocytogenes (ATCC 19115), Staphylococcus aureus (ATCC 25923), and Salmonella enterica serotype Typhimurium (ATCC 14028). The nine strains with the highest antagonistic activity were recovered from the following foods: pulque (T1), sprouted beans (T26), Ranchero cheese (T30, T31, T32, T33, T35, and T36), and Tenate cheese (T40). The inhibition zones on culture and sensitivity plates were 17.0 ± 1.2 to 19.3 ± 2.8 mm in diameter. Based on the antagonistic activity against pathogenic bacteria and resistance to low pH and bile salts, strain T40 had the highest probiotic potential. A 16S rRNA technique was used to identify strain T40 as Lacticaseibacillus paracasei (renamed from Lactobacillus paracasei in April 2020). This strain had no resistance to ampicillin, gentamicin, erythromycin, and tetracycline. The antagonistic activity was evaluated in situ (fresh cheese) against pathogenic bacteria, supporting the probiotic potential of L. paracasei. Isolates of this LAB recovered from Tenate cheese had characteristics of a probiotic microorganism with high potential for use in food technology. HIGHLIGHTS
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Affiliation(s)
- Reyna N Falfán-Cortés
- Universidad Autónoma del Estado de Hidalgo (UAEH), Instituto de Ciencias Básicas e Ingenieria (ICBI), Carr. Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, C.P. 42184, Hidalgo, México.,Catedratica, CONACYT; UAEH, ICBI Carr. Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, C.P. 42184, Hidalgo, México
| | - Nancy Mora-Peñaflor
- UAEH, Instituto de Ciencias Agropecuarias, Rancho Universitario Av. Universidad Km 1 Ex-Hda. De Aquetzalpa AP 32, Tulancingo, Hgo, México
| | - Carlos A Gómez-Aldapa
- Universidad Autónoma del Estado de Hidalgo (UAEH), Instituto de Ciencias Básicas e Ingenieria (ICBI), Carr. Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, C.P. 42184, Hidalgo, México
| | - Esmeralda Rangel-Vargas
- Universidad Autónoma del Estado de Hidalgo (UAEH), Instituto de Ciencias Básicas e Ingenieria (ICBI), Carr. Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, C.P. 42184, Hidalgo, México
| | - Otilio A Acevedo-Sandoval
- Universidad Autónoma del Estado de Hidalgo (UAEH), Instituto de Ciencias Básicas e Ingenieria (ICBI), Carr. Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, C.P. 42184, Hidalgo, México
| | - Melitón J Franco-Fernández
- UAEH, Instituto de Ciencias Agropecuarias, Rancho Universitario Av. Universidad Km 1 Ex-Hda. De Aquetzalpa AP 32, Tulancingo, Hgo, México
| | - Javier Castro-Rosas
- Universidad Autónoma del Estado de Hidalgo (UAEH), Instituto de Ciencias Básicas e Ingenieria (ICBI), Carr. Pachuca-Tulancingo Km 4.5, Mineral de la Reforma, C.P. 42184, Hidalgo, México
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18
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The Edible Plant Microbiome represents a diverse genetic reservoir with functional potential in the human host. Sci Rep 2021; 11:24017. [PMID: 34911987 PMCID: PMC8674285 DOI: 10.1038/s41598-021-03334-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 11/24/2021] [Indexed: 12/15/2022] Open
Abstract
Plant microbiomes have been extensively studied for their agricultural relevance on growth promotion and pathogenesis, but little is known about their role as part of the diet when fresh fruits and vegetables are consumed raw. Most studies describing these communities are based on 16S rRNA gene amplicon surveys, limiting our understanding of the taxonomic resolution at the species level and functional capabilities. In this study, we characterized microbes colonizing tomatoes, spinach, brined olives, and dried figs using shotgun metagenomics. We recovered metagenome-assembled genomes of novel lactic acid bacteria from green olives and identified high intra- and inter-specific diversity of Pseudomonas in tomatoes. All samples were colonized by Pseudomonas, consistent with other reports with distinct community structure. Functional characterization showed the presence of enzymes involved in vitamin and short chain fatty acid metabolism and degradation of diverse carbohydrate substrates including plant fibers. The dominant bacterial members were isolated, sequenced, and mapped to its metagenome confirming their identity and indicating the microbiota is culturable. Our results reveal high genetic diversity, previously uncultured genera, and specific functions reflecting a likely plant host association. This study highlights the potential that plant microbes can play when consumed as part of our diet and proposes these as transient contributors to the gut microbiome.
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19
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Medeiros JC, Leandro EDS, Maldonade IR, Alencar ER, Ribeiro CSDC, Ragassi CF. Characterization of the probiotic potential of lactic acid bacteria isolated from spontaneous fermentation of jalapeno peppers (
Capsicum annuum
L.). J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.16025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Júlia Carvalho Medeiros
- Department of Nutrition College of Health Sciences University of Brasília, Campus Darcy Ribeiro Brasilia Brazil
| | - Eliana dos Santos Leandro
- Department of Nutrition College of Health Sciences University of Brasília, Campus Darcy Ribeiro Brasilia Brazil
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20
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Fernández-Pacheco P, Rosa IZ, Arévalo-Villena M, Gomes E, Pérez AB. Study of potential probiotic and biotechnological properties of non-Saccharomyces yeasts from fruit Brazilian ecosystems. Braz J Microbiol 2021; 52:2129-2144. [PMID: 34595728 DOI: 10.1007/s42770-021-00541-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 06/08/2021] [Indexed: 11/25/2022] Open
Abstract
Yeast isolates from flowers and fruits from a Brazilian forest were studied. The yeasts were identified at species and strain level by PCR-RFLP and PCR-RAPD, respectively. The 46 isolated yeasts were classified into 11 different species belonging to the genera Candida, Diutina, Hanseniaspora, Meyerozyma, Pichia, Rhodotorula, and Torulaspora. A total of 20 different strains were found. In order to ascertain the probiotic potential, the resistance to gastrointestinal conditions, autoaggregation, and hydrophobicity assays were studied, along with the capacity to form biofilm. The results indicate that, although most of the strains presented better results than Saccharomyces boulardii (the only strain recognized as a probiotic yeast), four strains were the most promising, namely, Rhodotorula mucilaginosa 32, Meyerozyma caribbica 35, and Diutina rugosa 12 and 45, according to the Duncan test. Several biotechnological properties were evaluated. D. rugosa inhibited Dekkera bruxellensis. The assimilation or fermentation of seven sugars was tested, and only five of the yeasts did not show a capacity to assimilate any of the sugars under aerobic conditions. However, all strains were able to ferment at least one of the sugars under anaerobic conditions. As far as enzyme production is concerned, positive results were only found for the enzymes' amylase, pectinase, and protease. D. rugosa 42 and Hanseniaspora opuntiae 18, followed of Pichia kluyveri 26, showed high values for the production of melatonin. In conclusion, the results of this study show that several non-Saccharomyces present probiotic characteristics, and these have good potential for industrial applications in the food or biotechnology industries.
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Affiliation(s)
- Pilar Fernández-Pacheco
- Food Science and Technology Department, Castilla-La Mancha University, Av. Camilo José Cela S/N, Edificio Marie Curie, 13071, Ciudad Real, Spain
| | - Isabel Zaparoli Rosa
- Microbiology Department, Instituto de Biociências, Letras e Ciências Exatas - Ibilce Jardim Nazareth, Rua Cristóvão Colombo, Universidade Estadual Paulista, 15054-000 - São José do Rio Preto, São Paulo, Brazil
| | - María Arévalo-Villena
- Food Science and Technology Department, Castilla-La Mancha University, Av. Camilo José Cela S/N, Edificio Marie Curie, 13071, Ciudad Real, Spain.
| | - Eleni Gomes
- Microbiology Department, Instituto de Biociências, Letras e Ciências Exatas - Ibilce Jardim Nazareth, Rua Cristóvão Colombo, Universidade Estadual Paulista, 15054-000 - São José do Rio Preto, São Paulo, Brazil
| | - Ana Briones Pérez
- Food Science and Technology Department, Castilla-La Mancha University, Av. Camilo José Cela S/N, Edificio Marie Curie, 13071, Ciudad Real, Spain
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21
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Özkan ER, Öztürk Hİ, Demirci T, Akın N. Detection of biofilm formation, virulence factor genes, antibiotic-resistance, adherence properties, and some beneficial properties of cheese origin S. infantarius, S. gallolyticus, and S. lutetiensis strains belonging to the S. bovis/S. equinus complex. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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22
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Albayrak ÇB, Duran M. Isolation and characterization of aroma producing lactic acid bacteria from artisanal white cheese for multifunctional properties. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.112053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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23
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Survival of Lactobacillus paracasei subsp. paracasei LBC 81 in Fermented Beverage from Chickpeas and Coconut in a Static In Vitro Digestion Model. FERMENTATION 2021. [DOI: 10.3390/fermentation7030135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The objective of this study was to evaluate in a static in vitro digestion model the survival of Lactobacillus paracasei subsp. paracasei LBC 81 in fermented chickpea and coconut beverage. The fermented beverage was stored for 1 and 8 days at 4 °C and then submitted to gastric juice, pancreatic juice, or sequential exposure to gastric and pancreatic juice. The experiment controls were (i) control 1—suspension of cells in 0.85% saline solution; (ii) control 2—cell suspension in chickpea and coconut beverage. The survival of L. paracasei was determined in log CFU/mL and expressed as a survival percentage. The survival of L. paracasei in the fermented beverage after exposure to gastric juice and sequential exposure to gastric and pancreatic juice was 99.47 + 2.05% and 93.21 + 0.43%, respectively. These values were higher than those found for controls 1 and 2. The storage condition of the fermented beverage for 1 or 8 days at 4 °C did not affect the survival after exposure to gastric juice, pancreatic juice, or sequential exposure. The results obtained in this study conclude that the fermented beverage of chickpeas and coconut is an excellent carrier for L. paracasei LBC 81, capable of enhancing survival to gastrointestinal conditions and ensuring a greater number of viable cells reaching the intestinal epithelium.
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24
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Benítez-Cabello A, Torres-Maravilla E, Bermúdez-Humarán L, Langella P, Martín R, Jiménez-Díaz R, Arroyo-López FN. Probiotic Properties of Lactobacillus Strains Isolated from Table Olive Biofilms. Probiotics Antimicrob Proteins 2021; 12:1071-1082. [PMID: 31788768 DOI: 10.1007/s12602-019-09604-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In this work, 16 strains with promising probiotic characteristics belonging to the Lactobacillus pentosus (13) and Lactobacillus plantarum (3) species and isolated from table olive biofilms were tested for adherence to cell lines and to solvents, immunomodulatory, and anti-proliferative properties on epithelial human cellular lines. Most Lactobacillus strains were able to regulate the production of cytokines by stimulating the production of pro-inflammatory (IL-6) and anti-inflammatory (IL-10) interleukins on macrophages, and by suppressing the secretion of IL-8 on HT-29 TNF-α-induced model. Lactobacillus strains also showed anti-proliferative activity on the HT-29 cell line. No clear relation was found between adhesion to solvents and adhesion to HT-29 human cell line. Lactobacillus pentosus LPG1, which showed the best anti-inflammatory and immunomodulatory properties, was then tested in a dinitro-benzene sulfonic acid (DNBS)-induced chronic colitis murine model. As a measure of the inflammation, gut permeability and weight loss, as well as cytokine profiles, were determined. Lactobacillus pentosus LPG1 improved mice health as observed by a significant reduction of weight loss, gut permeability, and beneficial cytokine modulation. Macroscopic scores and tissue damage were also lower in mice administered with LPG1 with respect to the DNBS-treated group. These results showed that L. pentosus LPG1 isolated from plant could have potential as probiotic for use as an anti-inflammatory and immunomodulatory agent for patients with inflammatory bowel disease.
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Affiliation(s)
- Antonio Benítez-Cabello
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Ctra. Utrera km 1, Building 46, 41013, Seville, Spain.,INRA, Commensal and Probiotics-Host Interactions Laboratory, UMR 1319 Micalis, 78350, Jouy-en-Josas, France
| | - Edgar Torres-Maravilla
- INRA, Commensal and Probiotics-Host Interactions Laboratory, UMR 1319 Micalis, 78350, Jouy-en-Josas, France
| | - Luis Bermúdez-Humarán
- INRA, Commensal and Probiotics-Host Interactions Laboratory, UMR 1319 Micalis, 78350, Jouy-en-Josas, France
| | - Philippe Langella
- INRA, Commensal and Probiotics-Host Interactions Laboratory, UMR 1319 Micalis, 78350, Jouy-en-Josas, France
| | - Rebeca Martín
- INRA, Commensal and Probiotics-Host Interactions Laboratory, UMR 1319 Micalis, 78350, Jouy-en-Josas, France
| | - Rufino Jiménez-Díaz
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Ctra. Utrera km 1, Building 46, 41013, Seville, Spain
| | - Francisco Noé Arroyo-López
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Ctra. Utrera km 1, Building 46, 41013, Seville, Spain.
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25
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Abouloifa H, Rokni Y, Bellaouchi R, Ghabbour N, Karboune S, Brasca M, Ben Salah R, Chihib NE, Saalaoui E, Asehraou A. Characterization of Probiotic Properties of Antifungal Lactobacillus Strains Isolated from Traditional Fermenting Green Olives. Probiotics Antimicrob Proteins 2021; 12:683-696. [PMID: 30929140 DOI: 10.1007/s12602-019-09543-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The aim of this work is to characterize the potential probiotic properties of 14 antifungal Lactobacillus strains isolated from traditional fermenting Moroccan green olives. The molecular identification of strains indicated that they are composed of five Lactobacillus brevis, two Lactobacillus pentosus, and seven Lactobacillus plantarum. In combination with bile (0.3%), all the strains showed survival rates (SRs) of 83.19-56.51% at pH 3, while 10 strains showed SRs of 31.67-64.44% at pH 2.5. All the strains demonstrated high tolerance to phenol (0.6%) and produced exopolysaccharides. The autoaggregation, hydrophobicity, antioxidant activities, and surface tension value ranges of the strains were 10.29-41.34%, 15.07-34.67%, 43.11-52.99%, and 36.23-40.27 mN/m, respectively. Bacterial cultures exhibited high antifungal activity against Penicillium sp. The cell-free supernatant (CFS) of the cultures showed important inhibition zones against Candida pelliculosa (18.2-24.85 mm), as well as an antibacterial effect against some gram-positive and gram-negative bacteria (10.1-14.1 mm). The neutralized cell-free supernatant of the cultures displayed considerable inhibitory activity against C. pelliculosa (11.2-16.4 mm). None of the strains showed acquired or horizontally transferable antibiotic resistance or mucin degradation or DNase, hemolytic, or gelatinase activities. Lactobacillus brevis S82, Lactobacillus pentosus S75, and Lactobacillus plantarum S62 showed aminopeptidase, β-galactosidase, and β-glucosidase activities, while the other enzymes of API-ZYM were not detected. The results obtained revealed that the selected antifungal Lactobacillus strains are considered suitable candidates for use both as probiotic cultures for human consumption and for starters and as biopreservative cultures in agriculture, food, and pharmaceutical industries.
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Affiliation(s)
- Houssam Abouloifa
- Laboratory of Biochemistry and Biotechnology, Faculty of Sciences, Mohammed Premier University, 60000, Oujda, Morocco.
| | - Yahya Rokni
- Laboratory of Biochemistry and Biotechnology, Faculty of Sciences, Mohammed Premier University, 60000, Oujda, Morocco
| | - Reda Bellaouchi
- Laboratory of Biochemistry and Biotechnology, Faculty of Sciences, Mohammed Premier University, 60000, Oujda, Morocco
| | - Nabil Ghabbour
- Laboratory of Biochemistry and Biotechnology, Faculty of Sciences, Mohammed Premier University, 60000, Oujda, Morocco
| | - Salwa Karboune
- Department of Food Science and Agricultural Chemistry, Macdonald Campus, McGill University, 21,111 Lakeshore, Ste Anne de Bellevue, Montreal, Quebec, H9X 3V9, Canada
| | - Milena Brasca
- Institute of Sciences of Food Production, National Research Council, Via Celoria 2, 20133, Milan, Italy
| | - Riadh Ben Salah
- Laboratory of Microorganisms and Biomolecules, Centre of Biotechnology of Sfax, BP: 1177, 3018, Sfax, Tunisia
| | - Nour Eddine Chihib
- INRA-UMR UMET 8207- PIHM team, CNRS-INRA, University of Lille, 369 rue Jules Guesde, BP20039, 59651, Villeneuve d'Ascq Cedex, France
| | - Ennouamane Saalaoui
- Laboratory of Biochemistry and Biotechnology, Faculty of Sciences, Mohammed Premier University, 60000, Oujda, Morocco
| | - Abdeslam Asehraou
- Laboratory of Biochemistry and Biotechnology, Faculty of Sciences, Mohammed Premier University, 60000, Oujda, Morocco
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26
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Moreira MTC, Martins E, Perrone ÍT, de Freitas R, Queiroz LS, de Carvalho AF. Challenges associated with spray drying of lactic acid bacteria: Understanding cell viability loss. Compr Rev Food Sci Food Saf 2021; 20:3267-3283. [PMID: 34146458 DOI: 10.1111/1541-4337.12774] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 04/18/2021] [Accepted: 04/26/2021] [Indexed: 12/26/2022]
Abstract
Lactic acid bacteria (LAB) cultures used in food fermentation are often dried to reduce transportation costs and facilitate handling during use. Dried LAB ferments are generally lyophilized to ensure high cell viability. Spray drying has come to the forefront as a promising technique due to its versatility and lower associated energy costs. Adverse conditions during spray drying, such as mechanical stress, dehydration, heating, and oxygen exposure, can lead to low LAB cell viability. This reduced viability has limited spray drying's industrial applications thus far. This review aims to demonstrate the operations and thermodynamic principles that govern spray drying, then correlate them to the damage suffered by LAB cells during the spray-drying process. The particularities of spray drying that might cause LAB cell death are detailed in this review, and the conclusion may enhance future studies on ways to improve cell viability.
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Affiliation(s)
| | - Evandro Martins
- Inovaleite Laboratory, Department of Food Technology, Universidade Federal de Viçosa (UFV), Viçosa, Brazil
| | - Ítalo Tuler Perrone
- Pharmaceutical Sciences Department, Universidade Federal de Juiz de Fora, Minas Gerais, Brazil
| | - Rosângela de Freitas
- Inovaleite Laboratory, Department of Food Technology, Universidade Federal de Viçosa (UFV), Viçosa, Brazil
| | - Lucas Sales Queiroz
- Inovaleite Laboratory, Department of Food Technology, Universidade Federal de Viçosa (UFV), Viçosa, Brazil
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27
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Isolation, Identification, and Screening of Lactic Acid Bacteria with Probiotic Potential in Silage of Different Species of Forage Plants, Cocoa Beans, and Artisanal Salami. Probiotics Antimicrob Proteins 2021; 13:173-186. [PMID: 32601953 DOI: 10.1007/s12602-020-09679-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The objective of this study was to isolate and characterize lactic acid bacteria with probiotic potential in silages of different species of forage plants, cocoa beans, and artisanal salami. The obtained isolates were submitted to the following evaluations: (i) screening for tolerance to pH 2 and bile salts, (ii) genotypic identification of isolates, (iii) survival in simulated gastric and pancreatic conditions, (iv) antimicrobial activity, (v) antibiotic susceptibility and safety, and (vi) properties associated with adhesion capacity. A total of 82 isolates were obtained and were screened for pH 2.0 tolerance and capacity to growth in the presence of bile salts (1.0 and 2.0%). Only 19 strains simultaneously presented tolerance to pH 2.0 and bile salts. These 19 strains were evaluated for genetic profile by Box-PCR. Subsequently, the selected strains were subjected to partial sequencing of the 16S rRNA gene. The species Lactobacillus plantarum was prevalent. The identified strains were evaluated for survival under simulated gastric and pancreatic conditions. Some strains have shown tolerance in both conditions. Different strains showed variations in antimicrobial activity, susceptibility to antibiotics, and properties associated with adhesion (hydrophobicity, autoaggregation, coaggregation, and adhesion to CaCo2 cells). All strains were negative for hemolysis, DNase, gelatinase, and biogenic amine synthesis activity. The L. plantarum SBR64.7 strain can be considered the most promising for it presented the lowest viability reduction when exposed to gastric and pancreatic juices.
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28
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Probiotics in Fish Nutrition—Long-Standing Household Remedy or Native Nutraceuticals? WATER 2021. [DOI: 10.3390/w13101348] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Over the last decades, aquaculture production increased rapidly. The future development of the industry highly relies on the sustainable utilization of natural resources. The need for improving disease resistance, growth performance, food conversion, and product safety for human consumption has stimulated the application of probiotics in aquaculture. Probiotics increase growth and feed conversion, improve health status, raise disease resistance, decrease stress susceptibility, and improve general vigor. Currently, most probiotics still originate from terrestrial sources rather than fish. However, host-associated (autochthonous) probiotics are likely more persistent in the gastrointestinal tract of fish and may, therefore, exhibit longer-lasting effects on the host. Probiotic candidates are commonly screened in in vitro assays, but the transfer to in vivo assessment is often problematic. In conclusion, modulation of the host-associated microbiome by the use of complex probiotics is promising, but a solid understanding of the interactions involved is only in its infancy and requires further research. Probiotics could be used to explore novel ingredients such as chitin-rich insect meal, which cannot be digested by the fish host alone. Most importantly, probiotics offer the opportunity to improve stress and disease resistance, which is among the most pressing problems in aquaculture.
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29
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Ayyash MM, Abdalla AK, AlKalbani NS, Baig MA, Turner MS, Liu SQ, Shah NP. Invited review: Characterization of new probiotics from dairy and nondairy products-Insights into acid tolerance, bile metabolism and tolerance, and adhesion capability. J Dairy Sci 2021; 104:8363-8379. [PMID: 33934857 DOI: 10.3168/jds.2021-20398] [Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 03/24/2021] [Indexed: 12/12/2022]
Abstract
The selection of potential probiotic strains that possess the physiological capacity of performing successfully in the gastrointestinal tract (GIT) is a critical challenge. Probiotic microorganisms must tolerate the deleterious effects of various stresses to survive passage and function in the human GIT. Adhesion to the intestinal mucosa is also an important aspect. Recently, numerous studies have been performed concerning the selection and evaluation of novel probiotic microorganisms, mainly probiotic bacteria isolated from dairy and nondairy products. Therefore, it would be crucial to critically review the assessment methods employed to select the potential probiotics. This article aims to review and discuss the recent approaches, methods used for the selection, and outcomes of the evaluation of novel probiotic strains with the main purpose of supporting future probiotic microbial assessment studies. The findings and approaches used for assessing acid tolerance, bile metabolism and tolerance, and adhesion capability are the focus of this review. In addition, probiotic bile deconjugation and bile salt hydrolysis are explored. The selection of a new probiotic strain has mainly been based on the in vitro tolerance of physiologically related stresses including low pH and bile, to ensure that the potential probiotic microorganism can survive the harsh conditions of the GIT. However, the varied experimental conditions used in these studies (different types of media, bile, pH, and incubation time) hamper the comparison of the results of these investigations. Therefore, standardization of experimental conditions for characterizing and selecting probiotics is warranted.
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Affiliation(s)
- Mutamed M Ayyash
- Department of Food Science, College of Food and Agriculture, United Arab Emirates University (UAEU), PO Box 15551, Al Ain, United Arab Emirates.
| | - Abdelmoneim K Abdalla
- Food Science Department, College of Agriculture, South Valley University, 83523 Qena, Egypt
| | - Nadia S AlKalbani
- Department of Food Science, College of Food and Agriculture, United Arab Emirates University (UAEU), PO Box 15551, Al Ain, United Arab Emirates
| | - Mohd Affan Baig
- Department of Food Science, College of Food and Agriculture, United Arab Emirates University (UAEU), PO Box 15551, Al Ain, United Arab Emirates
| | - Mark S Turner
- School of Agriculture and Food Sciences, The University of Queensland (UQ), Brisbane, QLD 4072, Australia
| | - Shao-Quan Liu
- Department of Food Science and Technology, Faculty of Science, National University of Singapore, S14 Level 5, Science Drive 2 117542, Singapore
| | - Nagendra P Shah
- Food and Nutritional Science, School of Biological Sciences, the University of Hong Kong, Pokfulam Road, Hong Kong 999077, P.R. China
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Özkan ER, Demirci T, Öztürk Hİ, Akın N. Screening Lactobacillus strains from artisanal Turkish goatskin casing Tulum cheeses produced by nomads via molecular and in vitro probiotic characteristics. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:2799-2808. [PMID: 33135796 DOI: 10.1002/jsfa.10909] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/16/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Eleven Lactobacillus (L.) strains were newly isolated from traditional Turkish Tulum cheeses and were characterized regarding their potential probiotic characteristics (bile and acid tolerance, gastric and pancreatic juice tolerance, lysozyme tolerance, adhesion ability), virulence determinants (hemolytic activity, antibiotic resistance, biogenic amine production), and functional properties (antibacterial activity, β-galactosidase activity, production of exopolysaccharides, cholesterol removal). RESULTS These isolates were identified as L. brevis, L. plantarum, L. paracasei, L. coryniformis, L. rhamnosus and L. helveticus by 16S rRNA sequencing. With regard to safety aspects, none of the tested Lactobacillus isolates showed hemolytic activity or biogenic amine production. All the Lactobacillus isolates except isolate 24 were found to be sensitive or intermediate sensitive to penicillin, which is a frequently used antibiotic. Nine Lactobacillus isolates showed antibacterial activity against Staphylococcus aureus ATCC 25923, while only isolates 15 and 449 exhibited inhibitory activity against Listeria monocytogenes ATCC 7644. All isolated strains survived, even in the presence of 10.00 g L-1 bile after 48 h, and exhibited good survival at pH 3, but only two isolates survived at pH 2. Among the strains, isolate 15 exhibited satisfactory auto-aggregative, cell-surface hydrophobicity features, cholesterol-lowering activity and good acid tolerance. Isolate 15 also showed the strongest bile and simulated pancreatic juice resistance and moderate lysozyme tolerance. CONCLUSION These outcomes suggest that isolate 15, identified as a L. plantarum strain from Tulum cheese, may be a promising probiotic candidate and could be suitable for use in several fermented foods. © 2020 Society of Chemical Industry.
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Affiliation(s)
| | - Talha Demirci
- Department of Food Engineering, University of Selcuk, Konya, Turkey
| | - Hale İnci Öztürk
- Department of Food Engineering, Konya Food and Agriculture University, Konya, Turkey
| | - Nihat Akın
- Department of Food Engineering, University of Selcuk, Konya, Turkey
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31
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Fernández-Pacheco P, García-Béjar B, Jiménez-Del Castillo M, Carreño-Domínguez J, Briones Pérez A, Arévalo-Villena M. Potential probiotic and food protection role of wild yeasts isolated from pistachio fruits (Pistacia vera). JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:2201-2209. [PMID: 32978783 DOI: 10.1002/jsfa.10839] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/18/2020] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The biotechnological potential of yeasts from nuts such as pistachio, not only for health applications but also for industry use, has been scarcely studied. Interest in the probiotic capability of yeasts has increased in the past years as well as their utilization as food or feed preservatives. Their capabilities as biocontrol against problematic (spoilage or toxigenic) microorganisms or as antioxidants have been revalued. As a result, both abilities would be desirable to develop a new potential probiotic microorganism which could be added to food or feed to improve their properties. RESULTS Molecular techniques allowed the identification of a total of seven different species and 15 strains. A screening of the probiotic potential of these strains was carried out. It was found that 65% of the strains resisted the gastrointestinal conditions as well as presented a generation time of < 22 h. Additionally, some strains showed better kinetic parameters than Saccharomyces boulardii (positive control). Complementary tests were done to determine their auto-aggregation capacity, cell surface hydrophobicity, behaviour in a sequential simulated digestion, biofilm formation capability and carbon source assimilation. Finally, 67% and 13% of the studied yeasts showed biocontrol and antioxidant activities, respectively. CONCLUSIONS Diutina rugosa 14 followed by Diutina rugosa 8 were the best wild yeast from Pistacia vera as potential probiotic and in carbon source utilization. However, Hanseniaspora guilliermondii 6 and Aureobasidium proteae 5 could be used to improve food or feed product preservation because of their notable biocontrol and antioxidant capabilities. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Pilar Fernández-Pacheco
- Analytical Chemistry and Food Technology Department/Faculty of Environmental Science and Biochemistry, Castilla-La Mancha University, Toledo, Spain
| | - Beatriz García-Béjar
- Analytical Chemistry and Food Technology Department/Faculty of Chemical Sciences and Technologies, Castilla-La Mancha University, Ciudad Real, Spain
| | - Marina Jiménez-Del Castillo
- Analytical Chemistry and Food Technology Department/Faculty of Chemical Sciences and Technologies, Castilla-La Mancha University, Ciudad Real, Spain
| | - Javier Carreño-Domínguez
- Analytical Chemistry and Food Technology Department/Faculty of Chemical Sciences and Technologies, Castilla-La Mancha University, Ciudad Real, Spain
| | - Ana Briones Pérez
- Analytical Chemistry and Food Technology Department/Faculty of Chemical Sciences and Technologies, Castilla-La Mancha University, Ciudad Real, Spain
| | - María Arévalo-Villena
- Analytical Chemistry and Food Technology Department/Faculty of Chemical Sciences and Technologies, Castilla-La Mancha University, Ciudad Real, Spain
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Özkan ER, Demirci T, Akın N. In vitro assessment of probiotic and virulence potential of Enterococcus faecium strains derived from artisanal goatskin casing Tulum cheeses produced in central Taurus Mountains of Turkey. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.110908] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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33
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Abe Sato ST, Marques JM, da Luz de Freitas A, Sanches Progênio RC, Nunes MRT, Mota de Vasconcelos Massafra J, Gomes Moura F, Rogez H. Isolation and Genetic Identification of Endophytic Lactic Acid Bacteria From the Amazonian Açai Fruits: Probiotics Features of Selected Strains and Their Potential to Inhibit Pathogens. Front Microbiol 2021; 11:610524. [PMID: 33488551 PMCID: PMC7819895 DOI: 10.3389/fmicb.2020.610524] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Accepted: 12/08/2020] [Indexed: 12/31/2022] Open
Abstract
The açai palm (Euterpe oleracea) is native to the Amazon basin, a humid tropical forest. High levels of total mesophilic bacteria with high diversity have been consistently reported in açai fruits. As local consumers have few digestive problems, the results of the present study reveal the lactic acid bacteria (LAB) recovered from açai fruits with characteristics that suggest they are possible candidates for probiotics and antagonistic potential against pathogens for the first time. Açai fruits were sampled from five different locations in the Eastern Amazonia floodplains. Sixty-six isolates were recovered from fruits and tested for some probiotic characteristics following FAO/WHO guidelines. Approximately 65% of the isolates showed no catalase or oxidase activity, Gram-positive staining or cocci and bacilli cell morphology. Furthermore, 48% of the isolates demonstrated preliminary characteristics that suggest safety for use, as they presented no coagulase enzyme activity or gamma-hemolysis. These strains were identified as belonging to the genera Lactiplantibacillus and Pediococcus, and 32 strains also presented resistance to vancomycin, ciprofloxacin and streptomycin. In addition, 28 isolates showed a survival rate, expressed as log cycle reduction, higher than 0.9 under gastric conditions (pH 2). All strains tested positive in bile salts deconjugation tests and showed a survival rate higher than 0.8 in the presence of this salt. Regarding antimicrobial activity against pathogens, all strains were able to inhibit Salmonella Typhimurium (ATCC® 14028TM) and 97% were capable of inhibiting Escherichia coli (ATCC® 25922TM). Concerning the results of in vitro antagonistic assays, three isolates (B125, B135, and Z183 strains) were selected for antagonistic tests using açai juice contaminated with these two pathogens. All tested LAB strains were able to inhibit pathogen growth in açai juice. In summary, açai fruits are a potential source of LAB isolates to be investigated as probiotics.
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Affiliation(s)
- Suenne Taynah Abe Sato
- Centre for Valorization of Amazonian Bioactive Compounds (CVACBA), Universidade Federal do Pará, Belém, Brazil
| | - Joana Montezano Marques
- Centre for Valorization of Amazonian Bioactive Compounds (CVACBA), Universidade Federal do Pará, Belém, Brazil.,Laboratório de Genômica e Bioinformática, Centro de Genômica e Biologia de Sistemas, Universidade Federal do Pará, Belém, Brazil
| | - André da Luz de Freitas
- Centre for Valorization of Amazonian Bioactive Compounds (CVACBA), Universidade Federal do Pará, Belém, Brazil
| | | | | | | | - Fábio Gomes Moura
- Centre for Valorization of Amazonian Bioactive Compounds (CVACBA), Universidade Federal do Pará, Belém, Brazil
| | - Hervé Rogez
- Centre for Valorization of Amazonian Bioactive Compounds (CVACBA), Universidade Federal do Pará, Belém, Brazil
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Single and Multiple Inoculum of Lactiplantibacillus plantarum Strains in Table Olive Lab-Scale Fermentations. FERMENTATION-BASEL 2020. [DOI: 10.3390/fermentation6040126] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
In order to improve the olives’ quality, and to reduce the de-bittering time during the table olive fermentation process, it is necessary to pilot the fermentation by inoculating the brine with selected cultures of microorganisms. Some probiotic tests, such as resistance/sensitivity to antibiotics, bile salt hydrolase (BSH) activity, growth at acidic pH, an auto-aggregation assay, and a test of the production of exopolysaccharides, were carried out in order to screen 35 oleuropeinolytic Lactiplantibacillus plantarum subsp. plantarum strains to be used in guided fermentations of table olives. On the basis of the technological and probiotic screening, we analyzed the progress of three different lab-scale fermentations of Olea europaea L. Itrana cv. olives inoculated with spontaneous, single, and multiple starters: jar A was left to ferment spontaneously; jar B was inoculated with a strongly oleuropeinolytic strain (L. plantarum B1); jar C was inoculated with a multiple inoculum (L. plantarum B1 + L. plantarum B51 + L. plantarum B124). The following parameters were monitored during the fermentation: pH, titratable acidity, NaCl concentration, the degradation of bio-phenols, and the enrichment rate of hydroxytyrosol and tyrosol in the olive’s flesh, oil and brine. The degradation of secoiridoid glucosides appeared to be faster in the inoculated jars than in the spontaneously-fermented jar. The production of hydroxytyrosol and ligstroside aglycons was high. This indicated a complete degradation of the oleuropein and a partial degradation of the ligstroside. The multiple inoculum ensured a complete debittering, and could give probiotic traits. The presence of L. plantarum B1 and B124 as a fermentation starter guarantees an optimal trend of de-bittering and fermentation variables, thus ensuring the production of a better final product. L. plantarum B51 could be considered to be a promising probiotic candidate for obtaining probiotic food of completely vegetable origin.
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Sharma A, Lavania M, Singh R, Lal B. Identification and probiotic potential of lactic acid bacteria from camel milk. Saudi J Biol Sci 2020; 28:1622-1632. [PMID: 33732048 PMCID: PMC7938203 DOI: 10.1016/j.sjbs.2020.11.062] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 11/14/2020] [Indexed: 01/16/2023] Open
Abstract
In the present study, a total of 80 presumed lactic acid bacteria (LAB) were isolated from camel milk. Selected LAB were identified as Lactococcus lactis (cam 12), Enterococcus lactis (cam 14) and Lactobacillus plantarum (cam 15) and their potential were tested by tolerance & de-conjugation of bile salts, antimicrobial activity, surface hydrophobicity and adhesion potential) along with this of probiotics were evaluated for curd formation and assessed for sensory properties and syneresis. Selected LABs showed antimicrobial activity against wide range of pathogenic bacteria (Staphylococcus aureus, Pseudomonas aeruginosa, Bacillus cereus and Escherchiaia. coli). LAB (cam 12, cam 14 and cam15) were highly sceptible to chloramphenicol, vancomycin, and tetracyclin. In vitro adhesion studies with Caco-2 cells demonstrated strong adhesion activity with hydrophobicity (99%) was observed. Acute oral toxicity of E. lactis and L. plantarum showed non-toxic, non-virulent and safe for industrial application. The study provides potential LAB which may act as a substitute of functional food, synthetic feed and industrial curd formulation with in the shortest span (240 min at 28–32 °C).
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Affiliation(s)
- Anjali Sharma
- Microbial Biotechnology, Environmental and Industrial Biotechnology Division, The Energy and Resources Institute (TERI), New Delhi, India
| | - Meeta Lavania
- Microbial Biotechnology, Environmental and Industrial Biotechnology Division, The Energy and Resources Institute (TERI), New Delhi, India
| | - Raghvendar Singh
- Department of Biochemistry, National Research Centre on Camel, Jorbeer, Bikaner, India
| | - Banwari Lal
- Microbial Biotechnology, Environmental and Industrial Biotechnology Division, The Energy and Resources Institute (TERI), New Delhi, India
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36
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Cubas-Cano E, Venus J, González-Fernández C, Tomás-Pejó E. Assessment of different Bacillus coagulans strains for l-lactic acid production from defined media and gardening hydrolysates: Effect of lignocellulosic inhibitors. J Biotechnol 2020; 323:9-16. [PMID: 32712129 DOI: 10.1016/j.jbiotec.2020.07.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/07/2020] [Accepted: 07/22/2020] [Indexed: 11/17/2022]
Abstract
Cellulose valorisation has been successfully addressed for years. However, the use of hemicellulosic hydrolysates is limited due to the presence of C5-sugars and inhibitors formed during pretreatment. Bacillus coagulans is one of the few bacteria able to utilize both C6- and C5-sugars to produce l-lactic acid, but its susceptibility to the lignocellulosic inhibitors needs further investigation. For such a purpose, the tolerance of different B. coagulans strains to increasing concentrations of inhibitors is studied. The isolated A162 strain reached the highest l-lactic acid productivity in all cases (up to 2.4 g L-1 h-1), even in presence of 5 g L-1 of furans and phenols. Remarkably, most of furans and phenolic aldehydes were removed from defined media and hemicellulosic gardening hydrolysate after fermentation with A162. Considering the high productivities and the biodetoxifying effect attained, A162 could be pointed out as a great candidate for valorisation of mixed sugars from hemicellulosic hydrolysates with high inhibitors concentration, promoting the implementation of lignocellulosic biorefineries.
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Affiliation(s)
- Enrique Cubas-Cano
- IMDEA Energy Institute, Biotechnological Processes Unit, 28935, Móstoles, Spain
| | - Joachim Venus
- Leibniz Institute for Agricultural Engineering and Bioeconomy e.V. (ATB), 14469, Potsdam, Germany
| | | | - Elia Tomás-Pejó
- IMDEA Energy Institute, Biotechnological Processes Unit, 28935, Móstoles, Spain.
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37
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Ultrasonic Modulation of the Technological and Functional Properties of Yeast Strains. Microorganisms 2020; 8:microorganisms8091399. [PMID: 32932961 PMCID: PMC7564850 DOI: 10.3390/microorganisms8091399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/09/2020] [Accepted: 09/10/2020] [Indexed: 12/19/2022] Open
Abstract
This research was aimed at studying the effects of low intensity ultrasound (US) on some technological and functional properties of eight strains of Saccharomyces cerevisiae; namely, growth patterns (growth at 2–5% of NaCl or at 37 °C), autoaggregation and tolerance to simulated gastrointestinal conditions were evaluated. A US treatment was applied at 20% of net power (130 W) by a modulating duration (2–10 min) and pulses (2–10 s). The viable count (4.81–6.33 log CFU/mL) was not affected by US, while in terms of technological traits the effect was strain specific; in particular, for some strains a positive effect of US was found with a significant growth enhancement (growth index > 120%). The treatment was also able to increase the autoaggregation of some strains, thus suggesting that US could represent a promising way to treat and select nonconventional functional yeasts for food applications.
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38
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Oussaief O, Jrad Z, Sbissi I, Nasri W, Khorchani T, El‐Hatmi H. Technological and probiotic potential of autochthonous lactic acid bacteria from spontaneously fermented dromedary milk. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.14685] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Olfa Oussaief
- Livestock and Wildlife Laboratory Arid Lands Institute of Medenine University of Gabes Medenine Tunisia
| | - Zeineb Jrad
- Livestock and Wildlife Laboratory Arid Lands Institute of Medenine University of Gabes Medenine Tunisia
| | - Imed Sbissi
- Laboratory of Pastoral Ecosystems and Valorization of Spontaneous Plants and Associated Microorganisms Arid Lands Institute of Medenine University of Gabes Medenine Tunisia
| | - Waâd Nasri
- Livestock and Wildlife Laboratory Arid Lands Institute of Medenine University of Gabes Medenine Tunisia
| | - Touhami Khorchani
- Livestock and Wildlife Laboratory Arid Lands Institute of Medenine University of Gabes Medenine Tunisia
- Central Laboratory Arid Lands Institute of Medenine University of Gabes Medenine Tunisia
| | - Halima El‐Hatmi
- Livestock and Wildlife Laboratory Arid Lands Institute of Medenine University of Gabes Medenine Tunisia
- Department of Food, High Institute of Applied Biology of Medenine University of Gabes Medenine Tunisia
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39
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Bhushan B, Sakhare SM, Narayan KS, Kumari M, Mishra V, Dicks LMT. Characterization of Riboflavin-Producing Strains of Lactobacillus plantarum as Potential Probiotic Candidate through in vitro Assessment and Principal Component Analysis. Probiotics Antimicrob Proteins 2020; 13:453-467. [PMID: 32808141 DOI: 10.1007/s12602-020-09696-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Lactic acid bacteria (LAB) are known for their probiotic properties, but only a few strains produce riboflavin. We evaluated the probiotic properties of four riboflavin-producing strains of Lactobacillus plantarum (BBC33, BBC32A, BIF43, and BBC32B) by using in vitro assessment and carried out multivariate principal component analysis (PCA) to select the best strain. Safety, antioxidant, and exopolysaccharide-producing properties were also studied. Lact. plantarum BBC33 showed better probiotic potential, followed by strain BIF43. Lact. plantarum BBC32A degraded mucin and excluded as a potential probiotic candidate. Lact. plantarum BIF43, BBC33, and BBC32A tolerated simulated gastrointestinal conditions and their overnight cell-free culture supernatants (CFSs, pH 4.0-4.3) inhibited the growth of Escherichia coli AF10, Salmonella Typhi MTCC98, Bacillus cereus NCDC250, and Pseudomonas aeruginosa NCDC105. Lact. plantarum BIF43 and BBC33 did not degrade mucin, adhered to human epithelial colorectal adenocarcinoma Caco-2 cells (22-25%), and aggregated with indicators (30-50%). Moreover, both were non-hemolytic and sensitive to most antibiotics tested. Of the two selected strains, BIF43 showed better exopolysaccharides (EPS) producing phenotype. The CFSs of all strains showed high (85-93%) 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity. PCA confirmed the results obtained from in vitro probiotic experiments and supported the selection of Lact. plantarum BIF33 and BBC43, as potential probiotics.
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Affiliation(s)
- Bharat Bhushan
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat, 131028, India
| | - Sumit M Sakhare
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat, 131028, India
| | - Kapil Singh Narayan
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat, 131028, India
| | - Mamta Kumari
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat, 131028, India
| | - Vijendra Mishra
- Department of Basic and Applied Sciences, National Institute of Food Technology Entrepreneurship and Management, Kundli, Sonipat, 131028, India.
| | - Leon M T Dicks
- Department of Microbiology, Stellenbosch University, Stellenbosch, 7600, South Africa
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Bevilacqua A, Campaniello D, Speranza B, Racioppo A, Altieri C, Sinigaglia M, Corbo MR. Microencapsulation of Saccharomyces cerevisiae into Alginate Beads: A Focus on Functional Properties of Released Cells. Foods 2020; 9:E1051. [PMID: 32759736 PMCID: PMC7466292 DOI: 10.3390/foods9081051] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 07/30/2020] [Accepted: 07/31/2020] [Indexed: 11/16/2022] Open
Abstract
Five yeast strains (four wild Saccharomyces cerevisiae strains and a collection strain-S. cerevisiae var. boulardii) were encapsulated in alginate beads. Encapsulation yield was at least 60% (100% for some strains) and yeasts survived in beads for 30 days at 4 °C, although the viability was strongly affected during storage at 25 °C (3 log reduction after 7 days). The kinetic of cell release was studied under static and dynamic conditions, but the results suggest that, after 48 h, beads contained a high number of yeasts. Thus, their use is advisable as re-usable carriers of starter cultures or as a vehicle of probiotics into the gut. Finally, some functional properties (biofilm formation, hydrophobicity, auto-aggregation, survival during the transit into the gut) were evaluated on yeasts released by beads to assess if microencapsulation could negatively affect these traits. The results showed that yeasts' entrapment in beads did not affect probiotic properties.
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Affiliation(s)
| | | | | | | | | | | | - Maria Rosaria Corbo
- Department of the Science of Agriculture, Food and Environment, University of Foggia, Via Napoli 25, 71122 Foggia, Italy; (A.B.); (D.C.); (B.S.); (A.R.); (C.A.); (M.S.)
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FoodOmics as a new frontier to reveal microbial community and metabolic processes occurring on table olives fermentation. Food Microbiol 2020; 92:103606. [PMID: 32950142 DOI: 10.1016/j.fm.2020.103606] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 07/22/2020] [Accepted: 07/22/2020] [Indexed: 01/18/2023]
Abstract
Table olives are considered the most widespread fermented food in the Mediterranean area and their consumption is expanding all over the world. This fermented vegetable can be considered as a natural functional food thanks to their high nutritional value and high content of bioactive compounds that contribute to the health and well-being of consumers. The presence of bioactive compounds is strongly influenced by a complex microbial consortium, traditionally exploited through culture-dependent approaches. Recently, the rapid spread of omics technologies has represented an important challenge to better understand the function, the adaptation and the exploitation of microbial diversity in different complex ecosystems, such as table olives. This review provides an overview of the potentiality of omics technologies to in depth investigate the microbial composition and the metabolic processes that drive the table olives fermentation, affecting both sensorial profile and safety properties of the final product. Finally, the review points out the role of omics approaches to raise at higher sophisticated level the investigations on microbial, gene, protein, and metabolite, with huge potential for the integration of table olives composition with functional assessments.
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42
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A Review on Adventitious Lactic Acid Bacteria from Table Olives. Foods 2020; 9:foods9070948. [PMID: 32709144 PMCID: PMC7404733 DOI: 10.3390/foods9070948] [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: 06/10/2020] [Revised: 07/10/2020] [Accepted: 07/15/2020] [Indexed: 12/18/2022] Open
Abstract
Spontaneous fermentation constitutes the basis of the chief natural method of processing of table olives, where autochthonous strains of lactic acid bacteria (LAB) play a dominant role. A thorough literature search has unfolded 197 reports worldwide, published in the last two decades, that indicate an increasing interest in table olive-borne LAB, especially in Mediterranean countries. This review attempted to extract extra information from such a large body of work, namely, in terms of correlations between LAB strains isolated, manufacture processes, olive types, and geographical regions. Spain produces mostly green olives by Spanish-style treatment, whereas Italy and Greece produce mainly green and black olives, respectively, by both natural and Spanish-style. More than 40 species belonging to nine genera of LAB have been described; the genus most often cited is Lactobacillus, with L. plantarum and L. pentosus as most frequent species—irrespective of country, processing method, or olive type. Certain LAB species are typically associated with cultivar, e.g., Lactobacillus parafarraginis with Spanish Manzanilla, or L. paraplantarum with Greek Kalamata and Conservolea, Portuguese Galega, and Italian Tonda di Cagliari. Despite the potential of native LAB to serve as starter cultures, extensive research and development efforts are still needed before this becomes a commercial reality in table olive fermentation.
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Behera SS, El Sheikha AF, Hammami R, Kumar A. Traditionally fermented pickles: How the microbial diversity associated with their nutritional and health benefits? J Funct Foods 2020. [DOI: 10.1016/j.jff.2020.103971] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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44
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Ma J, Wang W, Sun C, Gu L, Liu Z, Yu W, Chen L, Jiang Z, Hou J. Effects of environmental stresses on the physiological characteristics, adhesion ability and pathogen adhesion inhibition of Lactobacillus plantarum KLDS 1.0328. Process Biochem 2020. [DOI: 10.1016/j.procbio.2020.02.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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45
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Probiotic and Cytotoxic Potential of Vaginal Lactobacillus Isolated from Healthy Northeast Indian Women. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.1.22] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Perpetuini G, Prete R, Garcia-Gonzalez N, Khairul Alam M, Corsetti A. Table Olives More than a Fermented Food. Foods 2020; 9:E178. [PMID: 32059387 PMCID: PMC7073621 DOI: 10.3390/foods9020178] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/05/2020] [Accepted: 02/07/2020] [Indexed: 12/31/2022] Open
Abstract
Table olives are one of the oldest vegetable fermented foods in the Mediterranean area. Beside their economic impact, fermented table olives represent also an important healthy food in the Mediterranean diet, because of their high content of bioactive and health-promoting compounds. However, olive fermentation is still craft-based following traditional processes, which can lead to a not fully predictable final product with the risk of spontaneous alterations. Nowadays, food industries have to face consumer demands for safe and healthy products. This review offers an overview about the main technologies used for olive fermentation and the role of lactic acid bacteria and yeasts characterizing this niche during the fermentation. Particular attention is offered to the selection and use of microorganisms as starter cultures to fasten and improve the safety of table olives. The development and implementation of multifunctional starter cultures in order to obtain heath-oriented table olives is also discussed.
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Affiliation(s)
| | | | | | | | - Aldo Corsetti
- Faculty of BioScience and Technology for Food, Agriculture and Environment, University of Teramo, 641000 Teramo, Italy; (G.P.); (R.P.); (N.G.-G.); (M.K.A.)
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Colombo M, Nero LA, Todorov SD. Safety profiles of beneficial lactic acid bacteria isolated from dairy systems. Braz J Microbiol 2020; 51:787-795. [PMID: 31970700 DOI: 10.1007/s42770-020-00227-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 01/10/2020] [Indexed: 12/18/2022] Open
Abstract
This study aimed to assess the safety aspects of 15 lactic acid bacteria (LAB) strains previously isolated from a dairy environment with relation to their beneficial features. LAB strains were assessed using phenotypic methods according to their production of virulence factors at 25 °C and 37 °C, as well as by examining their potential resistance to 15 antibiotics. Polymerase chain reaction (PCR) was also used to identify the presence of 50 genes associated with virulence factors and antibiotic resistance in the strains. None of the strains presented hemolytic activity or the production of gelatinase, lipase, deoxyribonuclease, or the tested biogenic amines. Based on the disk diffusion assay, all strains were resistant to oxacillin and sulfa/trimethoprim. Further, some were resistant to gentamicin (14), clindamycin (11), vancomycin (9), rifampicin (8), erythromycin (5), tetracycline (4), ampicillin (2), and chloramphenicol (1); no strain was resistant to imipenem. Regarding virulence- and antibiotic-resistance-related genes, 19 out of 50 tested genes were present in some strains; there was a variable association of expression. Based on the obtained data, the isolates presented relatively safe characteristics and behavior, findings that should lead to further studies to assess their potential usage as beneficial cultures in the food industry.
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Affiliation(s)
- Monique Colombo
- Departamento de Veterinária, InsPOA - Laboratório de Inspeção de Produtos de Origem Animal, Universidade Federal de Viçosa, Campus Viçosa s/n - Centro, Viçosa, MG, 36570-900, Brazil
| | - Luis Augusto Nero
- Departamento de Veterinária, InsPOA - Laboratório de Inspeção de Produtos de Origem Animal, Universidade Federal de Viçosa, Campus Viçosa s/n - Centro, Viçosa, MG, 36570-900, Brazil.
| | - Svetoslav Dimitrov Todorov
- Departamento de Veterinária, InsPOA - Laboratório de Inspeção de Produtos de Origem Animal, Universidade Federal de Viçosa, Campus Viçosa s/n - Centro, Viçosa, MG, 36570-900, Brazil. .,Faculdade de Ciências Farmacêuticas, Departamento de Alimentos e Nutrição Experimental, Laboratório de Microbiologia de Alimentos, Universidade de São Paulo, Av. Prof. Lineu Prestes 580 Bloco 14, São Paulo, SP, 05508-900, Brazil.
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Anagnostopoulos DA, Goulas V, Xenofontos E, Vouras C, Nikoloudakis N, Tsaltas D. Benefits of the Use of Lactic Acid Bacteria Starter in Green Cracked Cypriot Table Olives Fermentation. Foods 2019; 9:foods9010017. [PMID: 31878011 PMCID: PMC7023104 DOI: 10.3390/foods9010017] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 02/02/2023] Open
Abstract
Table olives are one of the most established Mediterranean vegetables, having an exponential increase consumption year by year. In the natural-style processing, olives are produced by spontaneous fermentation, without any chemical debittering. This natural fermentation process remains empirical and variable since it is strongly influenced by physicochemical parameters and microorganism presence in olive drupes. In the present work, Cypriot green cracked table olives were processed directly in brine (natural olives), using three distinct methods: spontaneous fermentation, inoculation with lactic acid bacteria at a 7% or a 10% NaCl concentration. Sensory, physicochemical, and microbiological alterations were monitored at intervals, and major differences were detected across treatments. Results indicated that the predominant microorganisms in the inoculated treatments were lactic acid bacteria, while yeasts predominated in control. As a consequence, starter culture contributed to a crucial effect on olives fermentation, leading to faster acidification and lower pH. This was attributed to a successful lactic acid fermentation, contrasting the acetic and alcoholic fermentation observed in control. Furthermore, it was established that inhibition of enterobacteria growth was achieved in a shorter period and at a significantly lower salt concentration, compared to the spontaneous fermentation. Even though no significant variances were detected in terms of the total phenolic content and antioxidant capacity, the degradation of oleuropein was achieved faster in inoculated treatments, thus, producing higher levels of hydroxytyrosol. Notably, the reduction of salt concentration, in combination with the use of starter, accented novel organoleptic characteristics in the final product, as confirmed from a sensory panel; hence, it becomes obvious that the production of Cypriot table olives at reduced NaCl levels is feasible.
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Tracking of Intentionally Inoculated Lactic Acid Bacteria Strains in Yogurt and Probiotic Powder. Microorganisms 2019; 8:microorganisms8010005. [PMID: 31861385 PMCID: PMC7022703 DOI: 10.3390/microorganisms8010005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 12/15/2019] [Accepted: 12/16/2019] [Indexed: 12/20/2022] Open
Abstract
The present work aimed at tracking intentionally inoculated lactic acid bacteria (LAB) strains in yogurt and probiotic powder. Leuconostoc (Leu.) mesenteroides (11251), Lactobacillus (L.) brevis (B151), and Lactobacillus plantarum (LB41K) strains were tracked in yogurt, and L. plantarum (LB41P) was tracked in a commercial probiotic powder. The yogurt was intentionally inoculated with the selected bacterial strains. Two types of yogurt with known and unknown bacterial pools were utilized. The standard 16S rRNA gene sequencing was used to evaluate the initial screening. The molecular typing tools, random amplified polymorphic DNA (RAPD), repetitive element palindromic PCR (rep-PCR), and comparative gene sequence analysis of selected housekeeping loci were used to track the inoculated dubious strains. Out of 30 random selections for each inoculation, the developed method identified seven (11251), nine (B151), and five (LB41K) colonies in the yogurt. The validation was performed by identifying 7 colonies (LB41P) out of 30 in the probiotic powder. The DNA banding profiles and the gene sequence alignments led to the identification of the correct inoculated strains. Overall, the study summarizes the use of molecular tools to identify the deliberately inoculated LAB strains. In conclusion, the proposed polyphasic approach effectively tracked the intentionally inoculated strains: Leu. mesenteroides, L. brevis, and L. plantarum (LB41K) in yogurt and L. plantarum (LB41P) in probiotic powder. The study demonstrates how to track industrially relevant misused LAB strains in marketable food products.
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In Vitro Evaluation of Probiotic Potential and Safety Assessment of Lactobacillus mucosae Strains Isolated from Donkey’s Lactation. Probiotics Antimicrob Proteins 2019; 12:1045-1056. [DOI: 10.1007/s12602-019-09610-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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