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Chen K, Zhou Z, Nie Y, Cao Y, Yang P, Zhang Y, Xu P, Yu Q, Shen Y, Ma W, Jin S, Liu C. Adjunctive efficacy of Bifidobacterium animalis subsp. lactis XLTG11 for functional constipation in children. Braz J Microbiol 2024; 55:1317-1330. [PMID: 38381349 PMCID: PMC11153453 DOI: 10.1007/s42770-024-01276-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 02/07/2024] [Indexed: 02/22/2024] Open
Abstract
Functional constipation (FC) can seriously affect the physical and mental health of children. The goal of this study is to assess the efficacy and safety of Bifidobacterium animalis subsp. lactis XLTG11 in treating FC in children through a randomized, double-blinded, placebo-controlled approach. Eligible children were randomized into either the intervention group (IG, n = 65, receiving conventional treatment with probiotics) or the control group (CG, n = 66, receiving conventional treatment without probiotics). The primary outcome measure was fecal frequency. Fecal gut microbiota analysis and PICRUSt (Phylogenetic Investigation of Communities by Reconstruction of Unobserved States) were used to predict gene family abundances based on 16S information. Over the course of treatment, the weekly frequency of feces within each group increased significantly (F = 41.97, p < 0.001). The frequency of feces (times/week (t/w)) in the IG was significantly higher than that in the CG (3.69 ± 2.62 t/w vs.3.18 ± 1.43 t/w, 4.03 ± 2.54 t/w vs. 2.89 ± 1.39 t/w and 3.74 ± 2.36 t/w vs. 2.94 ± 1.18 t/w and 3.45 ± 1.98 vs. 3.17 ± 1.41 t/w for the 1st, 2nd, 3rd, and 4th week after intervention, respectively) (F = 7.60, p = 0.0067). After the intervention, dominate species shifted to Bifidobacterium longum, Bifidobacterium breve, and Escherichia coli in the IG. Additionally, genes related to short-chain fatty acid (SCF) metabolism were upregulated, while methane metabolism was downregulated. Administration of XLTG11 at a dose of 1 × 1010 CFU/day to children increased fecal frequency, induced beneficial changes in gut microbiota, and regulated SCFs and methane metabolism-related genes.
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Affiliation(s)
- Ke Chen
- Department of Nutrition, School of Medicine, Chengdu Women's & Children's Central Hospital, University of Electronic Science and Technology of China, Chengdu, China.
| | - Zengyuan Zhou
- Department of Nutrition, School of Medicine, Chengdu Women's & Children's Central Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Yang Nie
- Department of Child Health Care, Chongzhou Maternal and Child Health Care Hospital, Chengdu, China
| | - Yanmei Cao
- Department of Child Health Care, Dayi Maternal and Child Health Care Hospital, Chengdu, China
| | - Ping Yang
- Department of Child Health Care, Xindu Maternal and Child Health Care Hospital, Chengdu, China
| | - Ying Zhang
- Department of Child Health Care, Jinniu Maternal and Child Health Care Hospital, Chengdu, China
| | - Ping Xu
- Department of Child Health Care, Qingbaijiang Maternal and Child Health Care Hospital, Chengdu, China
| | - Qinghua Yu
- Laboratory of Microbiology, Immunology and Metabolism, Diprobio (Shanghai) Co, Limited, Shanghai, China
| | - Yang Shen
- Laboratory of Microbiology, Immunology and Metabolism, Diprobio (Shanghai) Co, Limited, Shanghai, China
| | - Weiwei Ma
- College of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin, China
| | - Shanshan Jin
- Department of Nutrition, School of Medicine, Chengdu Women's & Children's Central Hospital, University of Electronic Science and Technology of China, Chengdu, China
| | - Changqi Liu
- School of Exercise and Nutritional Sciences, San Diego State University, San Diego, USA
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Kapse N, Pisu V, Dhakephalkar T, Margale P, Shetty D, Wagh S, Dagar S, Dhakephalkar PK. Unveiling the Probiotic Potential of Streptococcus thermophilus MCC0200: Insights from In Vitro Studies Corroborated with Genome Analysis. Microorganisms 2024; 12:347. [PMID: 38399752 PMCID: PMC10891967 DOI: 10.3390/microorganisms12020347] [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: 12/07/2023] [Revised: 01/22/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
Streptococcus thermophilus is widely used as a starter culture in the dairy industry and has garnered attention as a beneficial bacterium owing to its health-promoting functionalities in humans. In this study, the probiotic potential of S. thermophilus MCC0200 isolated from a dairy product was investigated through a combinatorial approach of in vitro and in silico studies. MCC0200 demonstrated the ability to survive harsh gastrointestinal (GI) transit, adhere to intestinal mucosa and exert health-promoting traits in in vitro studies. These findings were corroborated with in silico evidence, wherein, MCC0200 genome harboured genes associated with tolerance to GI conditions, intestinal adhesion and colonization. Genome mapping also highlighted the ability of MCC0200 to produce compounds advantageous for the host (folate, bacteriocins), to release antioxidant enzymes that can quench the free radicals (superoxide dismutase, NADH peroxidase), and to metabolize food components that can be harmful to sensitive people (lactose). MCC0200 also demonstrated a positive effect on reducing cholesterol levels, proving to be a potential candidate for food and pharmaceutical applications. The absence of transmissible antibiotic resistance genes and virulence genes underscored the generally regarded as safe (GRAS) nature of MCC0200. This study explored the potential of Streptococcus thermophilus for its probable applications as a probiotic beyond the dairy industry.
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Affiliation(s)
- Neelam Kapse
- Bioenergy Group, MACS-Agharkar Research Institute, Gopal Ganesh Agarkar Road, Pune 411004, Maharashtra, India; (N.K.); (V.P.); (D.S.)
| | - Vaidehi Pisu
- Bioenergy Group, MACS-Agharkar Research Institute, Gopal Ganesh Agarkar Road, Pune 411004, Maharashtra, India; (N.K.); (V.P.); (D.S.)
- Department of Microbiology, Savitribai Phule Pune University, Ganeshkhind Rd., Aundh, Pune 411007, Maharashtra, India
| | - Tanisha Dhakephalkar
- Department of Microbiology, Savitribai Phule Pune University, Ganeshkhind Rd., Aundh, Pune 411007, Maharashtra, India
- Hi Tech BioSciences India Ltd., Research & Development Centre, Plot No. 6 & 8, Ambadvet Industrial Estate, PO Paud, Pune 412108, Maharashtra, India
| | - Prajakta Margale
- Bioenergy Group, MACS-Agharkar Research Institute, Gopal Ganesh Agarkar Road, Pune 411004, Maharashtra, India; (N.K.); (V.P.); (D.S.)
- Department of Microbiology, Savitribai Phule Pune University, Ganeshkhind Rd., Aundh, Pune 411007, Maharashtra, India
| | - Deepa Shetty
- Bioenergy Group, MACS-Agharkar Research Institute, Gopal Ganesh Agarkar Road, Pune 411004, Maharashtra, India; (N.K.); (V.P.); (D.S.)
| | - Shilpa Wagh
- Hi Tech BioSciences India Ltd., Research & Development Centre, Plot No. 6 & 8, Ambadvet Industrial Estate, PO Paud, Pune 412108, Maharashtra, India
| | - Sumit Dagar
- Bioenergy Group, MACS-Agharkar Research Institute, Gopal Ganesh Agarkar Road, Pune 411004, Maharashtra, India; (N.K.); (V.P.); (D.S.)
- Department of Microbiology, Savitribai Phule Pune University, Ganeshkhind Rd., Aundh, Pune 411007, Maharashtra, India
| | - Prashant K. Dhakephalkar
- Bioenergy Group, MACS-Agharkar Research Institute, Gopal Ganesh Agarkar Road, Pune 411004, Maharashtra, India; (N.K.); (V.P.); (D.S.)
- Department of Microbiology, Savitribai Phule Pune University, Ganeshkhind Rd., Aundh, Pune 411007, Maharashtra, India
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He X, Zhang W, Feng P, Mai Z, Gong X, Zhang G. Role of Surface Coverage of Sessile Probiotics in Their Interplay with Pathogen Bacteria Investigated by Digital Holographic Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:17308-17317. [PMID: 37974298 DOI: 10.1021/acs.langmuir.3c02436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
The adhesion of probiotics plays an important role in the gastrointestinal tract. Understanding the effect of the coverage of colonized probiotics on enteric pathogens is critical for the design of effective probiotic therapies. In the present work, we have investigated the adaptive behaviors of the intestinal pathogenic bacteria Enterobacter sakazakii (ES) near the surfaces coated with a probiotic─Lactobacillus rhamnosus GG (LGG) as a function of surface coverage ratio (CRLGG) by using a home-setup digital holographic microscopy. It shows that ES cells can adaptively sense LGG within a distance of 4.2 μm, even at CRLGG values as low as 0.05%. The growth inhibition of ES cells slightly varies with CRLGG, but the near-surface acceleration and accumulation of ES cells have much dependence on CRLGG. As CRLGG increases from 0.05 to 24.6%, the percentage of actively swimming ES, the motion bias, the acceleration, and the interplay duration do not linearly vary with CRLGG. Instead, each of them shows an extreme at CRLGG of 13.4%, corresponding to the chemotaxis behaviors of ES cells induced by diffusing stimuli (organic acids, bacteriocins, etc.) released from LGG, which showed an extreme concentration gradient at CRLGG = 13.4% by simulations. Our study clearly demonstrates that surface coverage of sessile probiotics profoundly influences their interplay with pathogen bacteria, which should be taken into account in designing probiotic therapies.
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Affiliation(s)
- Xintong He
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Weixiong Zhang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Pu Feng
- School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, P. R. China
| | - Zhihui Mai
- Department of Stomatology, the Third Affiliated Hospital of Sun Yat-sen University, 600 Tianhe Road, Guangzhou 510630, P. R. China
| | - Xiangjun Gong
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
- Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates (South China University of Technology), Guangzhou 510640, P. R. China
| | - Guangzhao Zhang
- Faculty of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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Batoni G, Catelli E, Kaya E, Pompilio A, Bianchi M, Ghelardi E, Di Bonaventura G, Esin S, Maisetta G. Antibacterial and Antibiofilm Effects of Lactobacilli Strains against Clinical Isolates of Pseudomonas aeruginosa under Conditions Relevant to Cystic Fibrosis. Antibiotics (Basel) 2023; 12:1158. [PMID: 37508254 PMCID: PMC10376640 DOI: 10.3390/antibiotics12071158] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 06/30/2023] [Accepted: 07/04/2023] [Indexed: 07/30/2023] Open
Abstract
Therapy of lung infections sustained by Pseudomonas aeruginosa in cystic fibrosis (CF) patients is challenging due to the presence of a sticky mucus in the airways and the ability of the bacterium to form biofilm, which exhibits increased antibiotic tolerance. A lung-directed bacteriotherapy through the airway administration of probiotics could represent an alternative approach to probiotic diet supplementation to improve the benefits and clinical outcomes of this kind of intervention in CF patients. This study aims to evaluate the ability of probiotic strains to grow in artificial sputum medium (ASM), mimicking the CF lung microenvironment, and to affect the planktonic and biofilm growth of CF clinical strains of P. aeruginosa in the same conditions. The results demonstrate that Lacticaseibacillus rhamnosus and Lactiplantibacillus plantarum (LP) can grow in ASM. LP inhibited the planktonic growth of P. aeruginosa, while both lactobacilli reduced the pre-formed biofilm of P. aeruginosa. Interestingly, LP was demonstrated to reduce the amount of polysaccharides in the extracellular matrix of P. aeruginosa biofilms and to potentiate the antibiofilm effects of tobramycin. Overall, the results indicated that LP is a promising candidate as an adjuvant in the antimicrobial therapy of P. aeruginosa infections in CF patients.
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Affiliation(s)
- Giovanna Batoni
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via S. Zeno 37, 56123 Pisa, Italy
| | - Elisa Catelli
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via S. Zeno 37, 56123 Pisa, Italy
| | - Esingül Kaya
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via S. Zeno 37, 56123 Pisa, Italy
| | - Arianna Pompilio
- Department of Medical, Oral, and Biotechnological Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy
- Center for Advanced Studies and Technology, G. d'Annunzio University of Chieti-Pescara, Via L. Polacchi 11, 66100 Chieti, Italy
| | - Marta Bianchi
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via S. Zeno 37, 56123 Pisa, Italy
| | - Emilia Ghelardi
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via S. Zeno 37, 56123 Pisa, Italy
| | - Giovanni Di Bonaventura
- Department of Medical, Oral, and Biotechnological Sciences, G. d'Annunzio University of Chieti-Pescara, Via dei Vestini, 31, 66100 Chieti, Italy
- Center for Advanced Studies and Technology, G. d'Annunzio University of Chieti-Pescara, Via L. Polacchi 11, 66100 Chieti, Italy
| | - Semih Esin
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via S. Zeno 37, 56123 Pisa, Italy
| | - Giuseppantonio Maisetta
- Department of Translational Research and New Technologies in Medicine and Surgery, University of Pisa, Via S. Zeno 37, 56123 Pisa, Italy
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Yang T, Fan X, Li D, Zhao T, Wu D, Liu Z, Long D, Li B, Huang X. High Antioxidant Capacity of Lacticaseibacillus paracasei TDM-2 and Pediococcus pentosaceus TCM-3 from Qinghai Tibetan Plateau and Their Function towards Gut Modulation. Foods 2023; 12:foods12091814. [PMID: 37174356 PMCID: PMC10178559 DOI: 10.3390/foods12091814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 04/20/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
Probiotic supplementation is a key therapeutic strategy for promoting gut health and maintaining gut homeostasis by modulating functional microbiota. In this study, we isolated two lactic acid bacteria (LAB) strains, Pediococcus pentosaceus TCM-3 and Lacticaseibacillus paracasei TDM-2, from Qinghai-Tibetan plateau, and evaluated their probiotic properties and antioxidant bioactivity. In which, TDM-2 had higher T-AOC activity than either TCM-3 or LGG (4.10 μmol/mL vs. 3.68 and 3.53 μmol/mL, respectively, p < 0.05). These strains have shown high antioxidant activity compared to the LAB strains and were found to be acid and bile salt tolerant, confronting the safety issues of antibiotic resistance and the capability of surviving in simulated gastric and intestinal juices. In vitro fermentation experiments with human gut microbiota revealed significant differences in microbial community composition between samples supplemented with TCM-3 and TDM-2 and those without. The addition of these two strains resulted in an enrichment of beneficial taxa, such as the Pediococcus, Lactobacillus, and Clostridium_sensu_strictos at the genus level, and Firmicutes and Proteobacteria at the phylum level. Notably, the TCM-3 group exhibited higher short-chain fatty acid production than the TDM-2 group and untreated controls (acetic acid at 12 h: 4.54 mmol L-1 vs. 4.06 mmol L-1 and 4.00 mmol L-1; acetic acid at 24 h: 4.99 mmol L-1 vs. 4.90 mmol L-1 and 4.82 mmol L-1, p < 0.05). These findings demonstrate that LAB supplementation with high antioxidant capacity and probiotic properties can promote gut health by modulating functional microbiota and is enriching for beneficial taxa. Our study provides guidance for therapeutic strategies that use novel LAB strains to maintain gut homeostasis and functional microbiota modulation.
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Affiliation(s)
- Tingyu Yang
- School of Public Health, Lanzhou University, Lanzhou 730033, China
- Institute of Animal Husbandry and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa 850000, China
| | - Xueni Fan
- School of Public Health, Lanzhou University, Lanzhou 730033, China
- Institute of Animal Husbandry and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa 850000, China
| | - Diantong Li
- School of Public Health, Lanzhou University, Lanzhou 730033, China
- Institute of Animal Husbandry and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa 850000, China
| | - Tingting Zhao
- School of Public Health, Lanzhou University, Lanzhou 730033, China
- Institute of Animal Husbandry and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa 850000, China
| | - Dan Wu
- Institute of Animal Husbandry and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa 850000, China
| | - Zhenjiang Liu
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun 130012, China
| | - Danfeng Long
- School of Public Health, Lanzhou University, Lanzhou 730033, China
| | - Bin Li
- Institute of Animal Husbandry and Veterinary, Tibet Academy of Agricultural and Animal Husbandry Sciences, Key Laboratory of Animal Genetics and Breeding on Tibetan Plateau, Ministry of Agriculture and Rural Affairs, Lhasa 850000, China
| | - Xiaodan Huang
- School of Public Health, Lanzhou University, Lanzhou 730033, China
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Martín-Masot R, Herrador-López M, Navas-López VM. Dietary Habit Modifications in Paediatric Patients after One Year of Treatment with the Crohn's Disease Exclusion Diet. Nutrients 2023; 15:nu15030554. [PMID: 36771261 PMCID: PMC9921286 DOI: 10.3390/nu15030554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/15/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
Gut microbiota alterations play a key role in the pathogenesis of inflammatory bowel disease (IBD), and its modification through specific diets is an emerging line of treatment that is currently being researched. The aim of this study was to assess changes in the dietary habits of patients with Crohn's disease (CD) and their long-term adherence to dietary therapy with the Crohn's disease exclusion diet (CDED) after one year. To analyse the modification of dietary habits and adherence to the Mediterranean diet (DM), the KIDMED questionnaire, a food consumption frequency questionnaire, was used. Twenty-four hour recalls at two timepoints, namely prior to the start of the dietary therapy and one year later, were also carried out. The processing degrees of the foods consumed by the patients were analysed at both timepoints using the NOVA classification system. Data from 24 patients (15 boys), with a mean age of 12.7 ± 2.9 years at the start of the dietary therapy, were analysed. All patients showed an improvement in their dietary pattern in the form of a reduction in the intake of ultra-processed foods (UPFs); a higher adherence to the MD; a decrease in the intake of cold meats, seafood, pasta, precooked foods, soft drinks, and pastries; an increase in the intake of eggs, legumes, dairy products, and nuts (p < 0.05); and adequate adherence, even in the long-term, to foods allowed during the different phases of the dietary regimen. Although more factors have an impact on the course of the disease in these patients, improving their dietary habits is essential.
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Cristina Vergara Alvarez S, José Leiva Alaniz M, Victoria Mestre Furlani M, Vazquez F, Mancha Agresti P, Cristina Nally M, Paola Maturano Y. Bioprospecting of the probiotic potential of yeasts isolated from a wine environment. Fungal Genet Biol 2023; 164:103767. [PMID: 36529368 DOI: 10.1016/j.fgb.2022.103767] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 12/02/2022] [Accepted: 12/10/2022] [Indexed: 12/23/2022]
Abstract
Autochthonous yeasts of oenological origin are adapted to highly stressful and selective environments, which makes them potential candidates for probiotics. The objective of the present study was to explore the probiotic potential of 96 native yeasts of oenological origin, their biosafety, resistance to gastrointestinal tract conditions and adhesion properties. Regarding biosafety, 66 isolates shown negative hemolytic activity, negative urease activity and susceptibility to 3 or more antifungals. After the gastrointestinal resistance test, 15 isolates were selected that showed growth at different temperatures, tolerance to low pH and the presence of bile salts in in vitro tests. In general, survival after simulated conditions of the gastrointestinal tract was high and more restrictive was the duodenal. The results of the adhesion properties showed highly variable hydrophobicity and a high percentage of autoaggregation at 24 h. The maximum production of biofilm was detected in the Pichia strains. Of a total of 96 yeast strains, 15 non-Saccharomyces yeasts presented suitable properties as probiotic candidates. The native winemaking strains performed better than the reference probiotic strain, Saccharomyces cerevisiae var. boulardii CNCM I-745, which reaffirms that these strains are promising probiotic candidates and further studies are necessary to confirm their probiosis.
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Affiliation(s)
- Silvia Cristina Vergara Alvarez
- Instituto de Biotecnología, Universidad Nacional de San Juan, Av. San Martín 1109 (O), San Juan 5400, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas, Godoy Cruz 2290 Ciudad Autónoma de Buenos Aires C1425FQB, Argentina.
| | - María José Leiva Alaniz
- Instituto de Biotecnología, Universidad Nacional de San Juan, Av. San Martín 1109 (O), San Juan 5400, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas, Godoy Cruz 2290 Ciudad Autónoma de Buenos Aires C1425FQB, Argentina.
| | - María Victoria Mestre Furlani
- Instituto de Biotecnología, Universidad Nacional de San Juan, Av. San Martín 1109 (O), San Juan 5400, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas, Godoy Cruz 2290 Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
| | - Fabio Vazquez
- Instituto de Biotecnología, Universidad Nacional de San Juan, Av. San Martín 1109 (O), San Juan 5400, Argentina
| | - Pamela Mancha Agresti
- CEFET Centro Federal de Educação Tecnológica, Av. Amazonas, 5253 Belo Horizonte, Mina Gerais 30421-169, Brasil
| | - María Cristina Nally
- Instituto de Biotecnología, Universidad Nacional de San Juan, Av. San Martín 1109 (O), San Juan 5400, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas, Godoy Cruz 2290 Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
| | - Yolanda Paola Maturano
- Instituto de Biotecnología, Universidad Nacional de San Juan, Av. San Martín 1109 (O), San Juan 5400, Argentina; Consejo Nacional de Investigaciones Científicas y Tecnológicas, Godoy Cruz 2290 Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
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8
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Wang W, Geng M, Zhu C, Huang L, Zhang Y, Zhang T, Zhao C, Zhang T, Du X, Wang N. Protective Effects and Mechanism of a Novel Probiotic Strain Ligilactobacillus salivarius YL20 against Cronobacter sakazakii-Induced Necrotizing Enterocolitis In Vitro and In Vivo. Nutrients 2022; 14:nu14183827. [PMID: 36145205 PMCID: PMC9501190 DOI: 10.3390/nu14183827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/13/2022] [Accepted: 09/13/2022] [Indexed: 11/20/2022] Open
Abstract
Exposure to probiotics in early life contributes to host intestinal development and prevention of necrotizing enterocolitis (NEC). Cronobacter sakazakii (C. sakazakii), an opportunistic pathogen, can cause NEC, bacteremia, and meningitis in neonates, but the research of probiotics against C. sakazakii is limited relative to other enteropathogens. Here, the protective effect and mechanism of a novel probiotic Ligilactobacillus salivarius (L. salivarius) YL20 isolated from breast milk on C. sakazakii-induced intestinal injury were explored by using two in vitro models, including an C. sakazakii-infected intestinal organoid model and intestinal barrier model, as well as an in vivo experimental animal model. Our results revealed that L. salivarius YL20 could promote epithelial cell proliferation in intestinal organoids, rescue budding-impaired organoids, prevent the decrease of mRNA levels of leucine-rich repeat containing G protein-coupled receptor 5 (Lgr5), zonula occludens-1 (Zo-1) and Occludin, and reverse C. sakazakii-induced low level of Mucin 2 (MUC2) in intestinal organoids. Additionally, YL20 could inhibit C. sakazakii invasion, increase the expression of ZO-1 and occludin in C. sakazakii-infected HT-29 cells, and reverse TEER decrease and corresponding permeability increase across C. sakazakii-infected Caco-2 monolayers. Furthermore, YL20 administration could alleviate NEC in C. sakazakii-infected neonatal mice by increasing the mice survival ratio, decreasing pathology scores, and downregulating pro-inflammatory cytokines. Meanwhile, YL20 could also enhance intestinal barrier function in vivo by increasing the number of goblet cells, the level of MUC-2 and the expression of ZO-1. Our overall findings demonstrated for the first time the beneficial effects of L. salivarius YL20 against C. sakazakii-induced NEC by improving intestinal stem cell function and enhancing intestinal barrier integrity.
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Affiliation(s)
- Weiming Wang
- School of Traditional Chinese Medicine, Southern Medical University, Guangzhou 510515, China
- Correspondence: (W.W.); (N.W.); Tel.: +86-451-55665478 (W.W.); +86-22-60602099 (N.W.)
| | - Meng Geng
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
| | - Caixia Zhu
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
| | - Lei Huang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
| | - Yue Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
| | - Tengxun Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
| | - Chongjie Zhao
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
| | - Tongcun Zhang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
| | - Xinjun Du
- College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
| | - Nan Wang
- Key Laboratory of Industrial Fermentation Microbiology, Ministry of Education and Tianjin, College of Biotechnology, Tianjin University of Science and Technology, Tianjin 300457, China
- Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control, Tianjin 300457, China
- Correspondence: (W.W.); (N.W.); Tel.: +86-451-55665478 (W.W.); +86-22-60602099 (N.W.)
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Ke A, Parreira VR, Farber JM, Goodridge L. Inhibition of Cronobacter sakazakii in an infant simulator of the human intestinal microbial ecosystem using a potential synbiotic. Front Microbiol 2022; 13:947624. [PMID: 35910651 PMCID: PMC9335077 DOI: 10.3389/fmicb.2022.947624] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 06/27/2022] [Indexed: 12/22/2022] Open
Abstract
Powdered infant formula (PIF) can be contaminated with Cronobacter sakazakii, which can cause severe illnesses in infants. Synbiotics, a combination of probiotics and prebiotics, could act as an alternative control measure for C. sakazakii contamination in PIF and within the infant gut, but synbiotics have not been well studied for their ability to inhibit C. sakazakii. Using a Simulator of the Human Intestinal Microbial Ecosystem (SHIME®) inoculated with infant fecal matter, we demonstrated that a potential synbiotic, consisting of six lactic acid bacteria (LAB) strains and Vivinal GOS, can inhibit the growth of C. sakazakii in an infant possibly through either the production of antimicrobial metabolites like acetate, increasing species diversity within the SHIME compartments to compete for nutrients or a combination of mechanisms. Using a triple SHIME set-up, i.e., three identical SHIME compartments, the first SHIME (SHIME 1) was designated as the control SHIME in the absence of a treatment, whereas SHIME 2 and 3 were the treated SHIME over 2, 1-week treatment periods. The addition of the potential synbiotic (LAB + VGOS) resulted in a significant decrease in C. sakazakii levels within 1 week (p < 0.05), but in the absence of a treatment the significant decline took 2 weeks (p < 0.05), and the LAB treatment did not decrease C. sakazakii levels (p ≥ 0.05). The principal component analysis showed a distinction between metabolomic profiles for the control and LAB treatment, but similar profiles for the LAB + VGOS treatment. The addition of the potential synbiotic (LAB + VGOS) in the first treatment period slightly increased species diversity (p ≥ 0.05) compared to the control and LAB, which may have had an effect on the survival of C. sakazakii throughout the treatment period. Our results also revealed that the relative abundance of Bifidobacterium was negatively correlated with Cronobacter when no treatments were added (ρ = −0.96; p < 0.05). These findings suggest that C. sakazakii could be inhibited by the native gut microbiota, and inhibition can be accelerated by the potential synbiotic treatment.
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Mohammedsaeed W, Manzoor N. An in vitro investigation of the protective role of Staphylococcus Epidermidis extracts on Staphylococcus Aureus induced toxicity in human keratinocytes. Indian J Med Microbiol 2022; 40:239-244. [DOI: 10.1016/j.ijmmb.2022.01.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 12/30/2021] [Accepted: 01/16/2022] [Indexed: 11/05/2022]
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Ostapchenko D, Korotkyi O, Penchyk Y, Tsyryuk O, Sichel L. ANTIMICROBIAL POTENTIAL OF LACTIC ACID BACTERIA LACTOBACILLUS RHAMNOSUS LYSATE. BULLETIN OF TARAS SHEVCHENKO NATIONAL UNIVERSITY OF KYIV. SERIES: BIOLOGY 2022. [DOI: 10.17721/1728.2748.2022.91.19-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
According to World Health Organization, antibiotic resistance is rising to dangerously high levels in all parts of the world. New resistance mechanisms are emerging and spreading globally, threatening our ability to treat common infectious diseases. Therefore, searching for new antimicrobial agents of natural origin is an extraordinary global problem. The work aimed to determine the antimicrobial activity of lyophilized enzymatic lysate of cells of the Lactobacillus rhamnosus V strain of lactic acid bacteria. The object of the study was the drug Del-Imun V®, which hasanti-allergican dimmuno stimulating activity. The researchers' efforts aimed to fully reveal the drug's potential, particularlyitsanti microbialaction. Antimicrobial activity was determined by the minimum inhibitory concentration (MIC). Determination of MIC was carried out by the method of twotime serial dilutions in meat-peptone broth (MPB) for bacteria and liquid wort for yeast. Gram-negative (Escherichia coli IEM-1, Proteus vulgaris PA-12, Pseudomonas sp. MI-2) and Gram-positive (Bacillus subtilis BТ-2, Staphylococcus aureus BМС-1) bacteria, as well as yeast (Candida albicans D-6, Candida tropicalis PE-2, Candida utilis BVS-65). It was shown that MIC valuesof the native preparation for the bacterial test cultures (EscherichiacoliIEM-1, Bacillussubtilis BT-2, Staphylococcusaureus BMS-1, Proteusvulgaris PA-12, Pseudomonassp. MI-2) were 8 time slower, than those of the thermally in activated preparation, forthe yeasts (Candidaalbicans D-6, Candidatropicalis PE-2, Candidautilis BVS-65) – 4-8 time slower. As a result of the conducted research, the antibacterial and antifungal activity of the drugDel-Imun V® was established. The spectrum of antimicrobial activity concerned gram-positiveand gram-negative bacteria and yeast-like fungi of the genus Candida. The minimum inhibitory concentrations were quite low: from 1.0 to 4.0 μg/ml for bacterial cultures and from 62.5 to 125 μg/ml for yeast. The culture of B. subtilis BT-2 was the least sensitive to the drug's action (MIC – 12.5 μg/ml). There fore, it can be concluded that the lysate of Lactobacillus rhamnosus V lacticacid bacteriahasanti bacteria landanti fungal properties.
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Mantziari A, Mannila E, Collado MC, Salminen S, Gómez-Gallego C. Exogenous Polyamines Influence In Vitro Microbial Adhesion to Human Mucus According to the Age of Mucus Donor. Microorganisms 2021; 9:1239. [PMID: 34200306 PMCID: PMC8226599 DOI: 10.3390/microorganisms9061239] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 05/26/2021] [Accepted: 06/05/2021] [Indexed: 12/31/2022] Open
Abstract
Adhesion to intestinal mucus is the first step for microbiota colonization in early life. Polyamines are polycations with important physiological functions in both procaryotic and eucaryotic cells. However, their role in intestinal mucus adhesion is not known. The objective of the present study was to evaluate whether exogenous polyamines (putrescine, spermidine, spermine, and their combination) would alter the adhesive properties of Lacticaseibacillus rhamnosus GG (LGG), Bifidobacterium animalis subs. lactis Bb12, Cronobacter sakazakii, and Escherichia coli. Human intestinal mucus was isolated from healthy infants (0-6-month-old and 6-12-month-old) and healthy adults (25-52 years old). Spermidine significantly increased Bb12 adhesion (p < 0.05) in the mucus of infants (0-6 months) but reduced the adhesion of LGG in adult mucus (p < 0.05) with no significant effect in any of the infant groups. Spermine was more effective than polyamine combinations in reducing C. sakazakii (p < 0.05) adhesion in early infant mucus (0-6 months). The adhesion ability of E. coli remained unaffected by exogenous polyamines at any age in the concentrations tested. Our data suggest that polyamines may modulate the bacterial adhesion to mucus depending on the bacterial strain and depending at what age the mucus has been generated.
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Affiliation(s)
- Anastasia Mantziari
- Functional Foods Forum, Faculty of Medicine, University of Turku, 20520 Turku, Finland; (E.M.); (M.C.C.); (S.S.)
| | - Enni Mannila
- Functional Foods Forum, Faculty of Medicine, University of Turku, 20520 Turku, Finland; (E.M.); (M.C.C.); (S.S.)
| | - Maria Carmen Collado
- Functional Foods Forum, Faculty of Medicine, University of Turku, 20520 Turku, Finland; (E.M.); (M.C.C.); (S.S.)
- Institute of Agrochemistry and Food Technology, National Research Council (IATA-CSIC), 46980 Valencia, Spain
| | - Seppo Salminen
- Functional Foods Forum, Faculty of Medicine, University of Turku, 20520 Turku, Finland; (E.M.); (M.C.C.); (S.S.)
| | - Carlos Gómez-Gallego
- Institute of Public Health and Clinical Nutrition, School of Medicine, University of Eastern Finland, 70211 Kuopio, Finland
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Abstract
Postpartum uterine diseases are common in dairy cows and are a great concern for the dairy industry as they are associated with various consequences, including lower fertility, lower milk yield, and an overall negative impact on the host health. An infected uterus is a source of bacterial compounds and cytokines that spill into the systemic circulation, spreading inflammation to other organs. In this review article, we discuss a short overview of the anatomy of the reproductive tract of dairy cows and several infectious diseases of the uterus including metritis, endometritis, and pyometra. Additionally, we discuss the microbiome of the reproductive tract in health and during uterine diseases. As well, diagnostic criteria for metritis and endometritis and contributing factors for increased susceptibility to metritis infection are important topics of this review. To better understand how the uterus and reproductive tract respond to bacterial pathogens, a section of this review is dedicated to immunity of the reproductive tract. Both the innate and adaptive immunity systems are also discussed. We conclude the review with a factual discussion about the current treatments of uterine diseases and the new developments in the area of application of probiotics for uterine health. Mechanisms of actions of probiotics are discussed in detail and also some applications to prevent uterine infections in dairy cows are discussed.
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Polat Yemiş G, Delaquis P. Natural Compounds With Antibacterial Activity Against Cronobacter spp. in Powdered Infant Formula: A Review. Front Nutr 2020; 7:595964. [PMID: 33330595 PMCID: PMC7731913 DOI: 10.3389/fnut.2020.595964] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 10/08/2020] [Indexed: 12/15/2022] Open
Abstract
Bacteria from the genus Cronobacter are opportunistic foodborne pathogens capable of causing severe infections in neonates, the elderly and immunocompromised adults. The majority of neonatal infections have been linked epidemiologically to dehydrated powdered infant formulas (PIFs), the majority of which are manufactured using processes that do not ensure commercial sterility. Unfortunately, the osmotolerance, desiccation resistance, mild thermotolerance and wide-ranging minimum, optimum and maximum growth temperatures of Cronobacter spp. are conducive to survival and/or growth during the processing, reconstitution and storage of reconstituted PIFs. Consequently, considerable research has been directed at the development of alternative strategies for the control of Cronobacter spp. in PIFs, including approaches that employ antimicrobial compounds derived from natural sources. The latter include a range of phytochemicals ranging from crude extracts or essential oils derived from various plants (e.g., thyme, cinnamon, clove, marjoram, cumin, mint, fennel), to complex polyphenolic extracts (e.g., muscadine seed, pomegranate peel, olive oil, and cocoa powder extracts), purified simple phenolic compounds (e.g., carvacrol, citral, thymol, eugenol, diacetyl, vanillin, cinnamic acid, trans-cinnamaldehyde, ferulic acid), and medium chain fatty acids (monocaprylin, caprylic acid). Antimicrobials derived from microbial sources (e.g., nisin, other antibacterial peptides, organic acids, coenzyme Q0) and animal sources (e.g., chitosan, lactoferrin, antibacterial peptides from milk) have also been shown to exhibit antibacterial activity against the species. The selection of antimicrobials for the control of Cronobacter spp. requires an understanding of activity at different temperatures, knowledge about their mode of action, and careful consideration for toxicological and nutritional effects on neonates. Consequently, the purpose of the present review is to provide a comprehensive summary of currently available data pertaining to the antibacterial effects of natural antimicrobial compounds against Cronobacter spp. with a view to provide information needed to inform the selection of compounds suitable for control of the pathogen during the manufacture or preparation of PIFs by end users.
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Affiliation(s)
- Gökçe Polat Yemiş
- Department of Food Engineering, Sakarya University, Serdivan, Turkey
| | - Pascal Delaquis
- Summerland Research and Development Research Centre, Agriculture and AgriFood Canada, Summerland, BC, Canada
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Chauhan R, Singh N, Pal GK, Goel G. Trending biocontrol strategies against Cronobacter sakazakii: A recent updated review. Food Res Int 2020; 137:109385. [DOI: 10.1016/j.foodres.2020.109385] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 05/27/2020] [Accepted: 06/02/2020] [Indexed: 12/29/2022]
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16
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Ashaolu TJ. Immune boosting functional foods and their mechanisms: A critical evaluation of probiotics and prebiotics. Biomed Pharmacother 2020; 130:110625. [PMID: 32795926 DOI: 10.1016/j.biopha.2020.110625] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/02/2020] [Accepted: 08/05/2020] [Indexed: 12/13/2022] Open
Abstract
Comprehensive studies conducted on the link between the gut microbiome and immunity in recent decades have correspondingly led to ever increasing interests in functional foods, especially probiotics and prebiotics. Probiotics and prebiotics play crucial roles in managing the intestinal microbiota in order to improve host health, even though their influence on other body sites are being investigated. Different colonic bacteria metabolize dietary prebiotics to produce beneficial metabolites, especially short chain fatty acids (SCFAs) that improve luminal contents and intestinal performance, while positively affecting overall host physiology. Thus, this review provides a general perspective of the immune system, the gut immune system and its microbiota. The review also evaluates functional foods with critical but comprehensive perspectives into probiotics and prebiotics, their immune boosting and mechanisms of action. It is recommended that further mechanistic and translational studies are conducted to promote health, social life and also empower poverty-stricken communities.
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Affiliation(s)
- Tolulope Joshua Ashaolu
- Smart Agriculture Research and Application Team, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Viet Nam.
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Chen K, Xin J, Zhang G, Xie H, Luo L, Yuan S, Bu Y, Yang X, Ge Y, Liu C. A combination of three probiotic strains for treatment of acute diarrhoea in hospitalised children: an open label, randomised controlled trial. Benef Microbes 2020; 11:339-346. [PMID: 32720832 DOI: 10.3920/bm2020.0046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Acute diarrhoea continues to be a leading cause of morbidity, hospitalisation, and mortality worldwide, and probiotics have been proposed as a complementary therapy in the treatment of acute diarrhoea. The goal of this study is to assess the efficacy and safety of three combined probiotic strains, Bifidobacterium lactis Bi-07, Lactobacillus rhamnosus HN001, and Lactobacillus acidophilus NCFM, as an adjunct to rehydration therapy in treatment of acute watery diarrhoea in hospitalised children. Eligible diarrheal children were randomised into intervention group (IG, n=96, conventional treatment for diarrhoea in combination with probiotics) and control group (CG, n=98, conventional treatment for diarrhoea without probiotics). The primary assessments of this study were duration of diarrhoea and hospital stay and improvement in diarrhoea symptoms. Significantly more children in the IG showed improvements in diarrhoea (defined as a decrease of stool frequency to no more than four times per day and an improved stool consistency within 24-48 h after the treatment) than those in the CG (96.9 vs 79.6%, P<0.05). Children supplemented with the mixed strains had a 22.5 h shorter (121.4±13.7 h vs 143.9±19.8 h) mean duration of diarrhoea and 1.2 d shorter hospital stays (5.1±1.2 d vs 6.3±1.4 d) than children only receiving the rehydration therapy (P<0.05). The prevalence of constipation of children in the IG (3.1%) was markedly lower (P<0.05) than that of children in the CG (13.3%) after treatment. In conclusion, the mixture of three probiotic strains given to children aged 1-3 years resulted in shorter durations of diarrhoea and hospitalisation and a higher percentage of improved children.
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Affiliation(s)
- K Chen
- Department of Nutrition, Chengdu Women's & Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, No. 1617, Riyue Avenue, Qingyang District, Chengdu, Sichuan 6100131, China P.R
| | - J Xin
- Infinitus (China) Company Ltd., Hangzhou, Zhejiang, China P.R
| | - G Zhang
- Department of Pediatric Intensive Care Unit, Chengdu Women's & Children's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan, China P.R
| | - H Xie
- Department of Pediatrics, Dayi Maternal and Child Health Care Hospital, Chengdu, Sichuan, China P.R
| | - L Luo
- Department of Pediatrics, Dayi Maternal and Child Health Care Hospital, Chengdu, Sichuan, China P.R
| | - S Yuan
- Department of Nutrition, Chengdu Women's & Children's Central Hospital, School of Medicine, University of Electronic Science and Technology of China, No. 1617, Riyue Avenue, Qingyang District, Chengdu, Sichuan 6100131, China P.R
| | - Y Bu
- Department of Pediatrics, Dayi Maternal and Child Health Care Hospital, Chengdu, Sichuan, China P.R
| | - X Yang
- Department of Pediatrics, Dayi Maternal and Child Health Care Hospital, Chengdu, Sichuan, China P.R
| | - Y Ge
- Infinitus (China) Company Ltd., Hangzhou, Zhejiang, China P.R
| | - C Liu
- School of Exercise and Nutritional Sciences, San Diego State University, 5500 Campanile Dr, San Diego, CA 92182-7251, USA
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De Grandi R, Drago L, Bidossi A, Bottagisio M, Gelardi M, De Vecchi E. Putative Microbial Population Shifts Attributable to Nasal Administration of Streptococcus salivarius 24SMBc and Streptococcus oralis 89a. Probiotics Antimicrob Proteins 2020; 11:1219-1226. [PMID: 30535674 PMCID: PMC6854047 DOI: 10.1007/s12602-018-9488-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Changes in bacterial composition of nasal microbiota may alter the host's susceptibility to several infectious and allergic diseases such as chronic rhinosinusitis and allergic rhinitis. The aim of this study was to evaluate the effects of 1-week administration of a probiotic product, composed by a combination of Streptococcus salivarius 24SMBc and Streptococcus oralis 89a, on the nostril microbiota. Differences in the nasal microbiota composition were investigated by using a next-generation sequencing approach. A strong and significant decrease in Staphylococcus aureus abundance was detected immediately after the bacterial administration. Moreover, comparing the microbial networks of nostril microbiota before and 1 month after the end of treatment, we detected an increase in the total number of both bacterial nodes and microbial correlations, with particular regard to the beneficial ones. Furthermore, a less abundance of microbial genera commonly associated to potential harmful bacteria has been observed. These results suggest a potential ability of S. salivarius 24SMBc and S. oralis 89a to regulate and reorganize the nasal microbiota composition, possibly favoring those microorganisms that may be able to limit the overgrowth of potential pathogens.
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Affiliation(s)
- Roberta De Grandi
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Orthopedic Institute Galeazzi, Via Galeazzi 4, 20164, Milan, Italy.
| | - Lorenzo Drago
- Laboratory of Clinical Microbiology, Department of Biomedical Sciences for Health, University of Milan, Milan, Italy
| | - Alessandro Bidossi
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Orthopedic Institute Galeazzi, Via Galeazzi 4, 20164, Milan, Italy
| | - Marta Bottagisio
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Orthopedic Institute Galeazzi, Via Galeazzi 4, 20164, Milan, Italy
| | - Matteo Gelardi
- Otolaryngology Unit, Department of Basic Medical Science, Neuroscience and Sensory Organs, University of Bari Aldo Moro, Bari, Italy
| | - Elena De Vecchi
- Laboratory of Clinical Chemistry and Microbiology, IRCCS Orthopedic Institute Galeazzi, Via Galeazzi 4, 20164, Milan, Italy
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Berkes E, Liao YH, Neef D, Grandalski M, Monsul N. Potentiated In Vitro Probiotic Activities of Lactobacillus fermentum LfQi6 Biofilm Biomass Versus Planktonic Culture. Probiotics Antimicrob Proteins 2019; 12:1097-1114. [PMID: 31828607 DOI: 10.1007/s12602-019-09624-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In this study, we describe enhanced in vitro probiotic activities of preformed biofilms versus planktonic cultures of Lactobacillus fermentum LfQi6 (LfQi6), a lactic acid bacterium (LAB) isolated from the human microbiome. These evaluations are used to help predict host in vivo probiotic benefits and therefore indicate that LfQi6 may provide significant probiotic benefits in the human host when administered as preformed biofilms rather than as planktonic cultures. Specifically, LfQi6 biofilms demonstrated improved in vitro performance versus LfQi6 planktonic cultures for host gastrointestinal survival and engraftment, strain-specific antimicrobial and anti-biofilm activity against clinically significant pathogens, concurrent promotion of beneficial gastrointestinal commensal biofilms, beneficial commensal enzyme activities, and host cellular-protective glutathione antioxidant activity. Evaluation of LfQi6 according to the European Food Safety Authority (EFSA 2007, 2012, 2015) Guidelines and Joint FAO/WHO Expert Consultation on Evaluation of Health and Nutritional Properties of Probiotics in Food Evaluation of Probiotics in Food (FAO/WHO, 2002) demonstrates strain safety. In summary, in vitro evaluation of Lact. fermentum LfQi6 demonstrates significant evidence for strain-specific probiotic characteristics and safety. Moreover, strain-specific as well as biofilm-phenotype-specific benefits demonstrated in vitro furthermore suggest that in vivo use of LfQi6 biofilm biomass may be of greater benefit to the human host than the use of standard planktonic cultures. This concept - potentiating probiotic benefits through the use of preformed commensal biofilms - is novel and may serve to further broaden the application of microbial biofilms to human health.
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Affiliation(s)
- Eva Berkes
- Quorum Innovations, LLC, 2068 Hawthorne Street, Sarasota, FL, 34239, USA.
- Florida State University College of Medicine Clerkship Faculty Sarasota Regional Campus, Sarasota, FL, USA.
| | - Yu-Hsien Liao
- Quorum Innovations, LLC, 2068 Hawthorne Street, Sarasota, FL, 34239, USA
| | - Daniel Neef
- Quorum Innovations, LLC, 2068 Hawthorne Street, Sarasota, FL, 34239, USA
| | - Michael Grandalski
- Quorum Innovations, LLC, 2068 Hawthorne Street, Sarasota, FL, 34239, USA
| | - Nicholas Monsul
- Quorum Innovations, LLC, 2068 Hawthorne Street, Sarasota, FL, 34239, USA
- Florida State University College of Medicine Clerkship Faculty Sarasota Regional Campus, Sarasota, FL, USA
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Jamwal A, Sharma K, Chauhan R, Bansal S, Goel G. Evaluation of commercial probiotic lactic cultures against biofilm formation by Cronobacter sakazakii. Intest Res 2019; 17:192-201. [PMID: 30508474 PMCID: PMC6505092 DOI: 10.5217/ir.2018.00106] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/26/2018] [Accepted: 10/15/2018] [Indexed: 01/26/2023] Open
Abstract
BACKGROUND/AIMS Cronobacter sakazakii, an emergent pathogen is considered as a major concern to infants and neonates fed on reconstituted powdered infant milk formula. In conjunction with many other factors, biofilm forming capacity adds to its pathogenic potential. In view of the facts that infants are at highest risk to C. sakazakii infections, and emerging antibiotic resistance among pathogens, it is imperative to evaluate probiotic cultures for their efficacy against C. sakazakii. Therefore, pure probiotic strains were isolated from commercial probiotic products and tested for their antimicrobial and anti-biofilm activities against C. sakazakii. METHODS A total of 6 probiotic strains were tested for their antibiotic susceptibility followed by antimicrobial activity using cell-free supernatant (CFS) against C. sakazakii. The inhibitory activity of CFS against biofilm formation by C. sakazakii was determined using standard crystal violet assay and microscopic observations. RESULTS All the probiotic strains were sensitive to ampicillin, tetracycline, vancomycin and carbenicillin whereas most of the strains were resistant to erythromycin and novobiocin. Four of the 6 probiotic derived CFS possessed antimicrobial activity against C. sakazakii at a level of 40 μL. A higher biofilm inhibitory activity (>80%) was observed at initial stages of biofilm formation with weaker activity during longer incubation upto 48 hours (50%-60%). CONCLUSIONS The study indicated the efficacy of isolated commercial probiotics strains as potential inhibitor of biofilm formation by C. sakazakii and could be further explored for novel bioactive molecules to limit the emerging infections of C. sakazakii.
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Affiliation(s)
- Anubhav Jamwal
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, India
| | - Kavita Sharma
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, India
| | - Rajni Chauhan
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, India
| | - Saurabh Bansal
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, India
| | - Gunjan Goel
- Department of Biotechnology and Bioinformatics, Jaypee University of Information Technology, Waknaghat, India
- Department of Microbiology, School of Interdisciplinary and Applied Life Sciences, Central University of Haryana, Mahendergarh, India
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Abstract
Nutritionally, the first 1,000 days of an infant's life - from conception to two years - has been identified as a highly influential period, during which lasting health can be achieved. Significant evidence links patterns of infant feeding to both short and long-term health outcomes, many of which can be prevented through nutritional modifications. Recommended globally, breastfeeding is recognised as the gold standard of infant nutrition; providing key nutrients to achieve optimal health, growth and development, and conferring immunologic protective effects against disease. Nevertheless, infant formulas are often the sole source of nutrition for many infants during the first stage of life. Producers of infant formula strive to supply high quality, healthy, safe alternatives to breast milk with a comparable balance of nutrients to human milk imitating its composition and functional performance measures. The concept of 'nutritional programming', and the theory that exposure to specific conditions, can predispose an individual's health status in later life has become an accepted dictum, and has sparked important nutritional research prospects. This review explores the impact of early life nutrition, specifically, how different feeding methods affect health outcomes.
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Affiliation(s)
- Susan Finn
- Nutrition and Health Science from Cork Institute of Technology
| | | | | | - Roy D. Sleator
- University College Cork and National University of Ireland
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22
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Wan MLY, Forsythe SJ, El-Nezami H. Probiotics interaction with foodborne pathogens: a potential alternative to antibiotics and future challenges. Crit Rev Food Sci Nutr 2018; 59:3320-3333. [PMID: 29993263 DOI: 10.1080/10408398.2018.1490885] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Antibiotics are a key tool used nowadays in health care industry to fight against bacterial infections; however, repeated antibiotic use or misuses, have led to bacterial resistance, causing significant threats for many people with common bacterial infections. The use of probiotics to enhance gastrointestinal health has been proposed for many years. In recent years, there has been an increasing interest in the use of probiotic bacteria as alternatives for antibiotics for preventing or treating various intestinal infections. Several important underlying mechanisms responsible for the antagonistic effects of probiotics on different microorganisms include: (1) competitive exclusion for adhesion sites and nutritional sources; (2) secretion of antimicrobial substances; (3) enhancement of intestinal barrier function; and (4) immunomodulation. However, their mode of action is not very well understood and therefore a clearer understanding of these mechanisms is necessitated. This will enable appropriate probiotic strains to be selected for particular applications and may reveal new probiotic functions. The goal of this review was to highlight some studies from literature describing the probiotic interaction with several major foodborne pathogens, as well as explore the mechanisms for such probiotic-pathogen interaction. The review will conclude by presenting future perspective and challenges of probiotic application in food products.
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Affiliation(s)
- Murphy Lam Yim Wan
- School of Biological Sciences, Faculty of Science, The University of Hong Kong, Pokfulam, Hong Kong S.A.R
| | | | - Hani El-Nezami
- School of Biological Sciences, Faculty of Science, The University of Hong Kong, Pokfulam, Hong Kong S.A.R.,Institute of Public Health and Clinical Nutrition, University of Eastern Finland, Kuopio, Finland
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Toscano M, De Grandi R, Pastorelli L, Vecchi M, Drago L. A consumer's guide for probiotics: 10 golden rules for a correct use. Dig Liver Dis 2017; 49:1177-1184. [PMID: 28830747 DOI: 10.1016/j.dld.2017.07.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 07/19/2017] [Accepted: 07/20/2017] [Indexed: 02/08/2023]
Abstract
Probiotics are used all over the world as their beneficial effects on the human organism have been widely demonstrated. Certain probiotics can down-regulate production of pro-inflammatory cytokines and promote intestinal epithelial barrier functions, increasing an anti-inflammatory response and contributing to the host's overall health. The main mechanisms by which probiotic microorganisms can interact with the host are by modulating the immune system and the epithelial cell functions and interacting with intestinal gut microbiota. To date, hundreds of different microorganisms are used for the formulation of numerous probiotic products; therefore, it is very difficult to choose the best probiotic product for specific or more general needs. Therefore, physicians are getting more and more confused due to the high number of commercial products which are often lacking healthy effects on the host. Therefore, the aim of this paper is to demonstrate the main characteristics that probiotic microorganisms and products should possess to have a positive impact on the host's health. To this purpose, this review suggests "10 golden rules" or "commandments" that clinicians should follow to properly select the optimal probiotic product and avoid misidentifications, mislabelling and "pie in the sky" stories.
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Affiliation(s)
- Marco Toscano
- Laboratory of Clinical Microbiology, Department of Biomedical Science for Health, University of Milan, Milan, Italy
| | - Roberta De Grandi
- Laboratory of Clinical Microbiology, Department of Biomedical Science for Health, University of Milan, Milan, Italy
| | - Luca Pastorelli
- Department of Biomedical Science for Health, University of Milan, Milan, Italy; Gastroenterology and Gastrointestinal Endoscopy Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy
| | - Maurizio Vecchi
- Department of Biomedical Science for Health, University of Milan, Milan, Italy; Gastroenterology and Gastrointestinal Endoscopy Unit, IRCCS Policlinico San Donato, San Donato Milanese, Italy
| | - Lorenzo Drago
- Laboratory of Clinical Microbiology, Department of Biomedical Science for Health, University of Milan, Milan, Italy; Laboratory of Clinical-Chemistry and Microbiology, IRCCS Galeazzi Institute, University of Milan, Milan, Italy.
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24
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Liu Q, Ni X, Wang Q, Peng Z, Niu L, Wang H, Zhou Y, Sun H, Pan K, Jing B, Zeng D. Lactobacillus plantarum BSGP201683 Isolated from Giant Panda Feces Attenuated Inflammation and Improved Gut Microflora in Mice Challenged with Enterotoxigenic Escherichia coli. Front Microbiol 2017; 8:1885. [PMID: 29018435 PMCID: PMC5623042 DOI: 10.3389/fmicb.2017.01885] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 09/14/2017] [Indexed: 12/28/2022] Open
Abstract
In this work, we searched for an effective probiotic that can help control intestinal infection, particularly enterotoxigenic Escherichia coli K88 (ETEC) invasion, in giant panda (Ailuropoda melanoleuca). As a potential probiotic strain, Lactobacillus plantarum BSGP201683 (L. plantarum G83) was isolated from the feces of giant panda and proven beneficial in vitro. This study was aimed to evaluate the protective effect of L. plantarum G83 in mice challenged with ETEC. The mice were orally administered with 0.2 mL of PBS containing L. plantarum G83 at 0 colony-forming units (cfu) mL−1 (control; negative control, ETEC group), 5.0 × 108 cfu mL−1 (LDLP), 5.0 × 109 cfu mL−1 (MDLP), and 5.0 × 1010 cfu mL−1 (HDLP) for 14 consecutive days. At day 15, the mice (LDLP, MDLP, HDLP, and ETEC groups) were challenged with ETEC and assessed at 0, 24, and 144 h. Animal health status; chemical and biological intestinal barriers; and body weight were measured. Results showed that L. plantarum G83 supplementation protected the mouse gut mainly by attenuating inflammation and improving the gut microflora. Most indices significantly changed at 24 h after challenge compared to those at 0 and 144 h. All treatment groups showed inhibited plasma diamine oxidase activity and D-lactate concentration. Tight-junction protein expression was down-regulated, and interleukin (IL)-1β, IL-6, IL-8, TLR4, and MyD88 levels were up-regulated in the jejunum in the LDLP and MDLP groups. The number of the Enterobacteriaceae family and the heat-labile enterotoxin (LT) gene decreased (P < 0.05) in the colons in the LDLP and MDLP groups. All data indicated that L. plantarum G83 could attenuate acute intestinal inflammation caused by ETEC infection, and the low and intermediate doses were superior to the high dose. These findings suggested that L. plantarum G83 may serve as a protective probiotic for intestinal disease and merits further investigation.
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Affiliation(s)
- Qian Liu
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Xueqin Ni
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Qiang Wang
- Chengdu Wildlife Institute, Chengdu Zoo, Chengdu, China
| | - Zhirong Peng
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Lili Niu
- Chengdu Wildlife Institute, Chengdu Zoo, Chengdu, China
| | - Hengsong Wang
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yi Zhou
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Hao Sun
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Kangcheng Pan
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Bo Jing
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Chengdu, China
| | - Dong Zeng
- Animal Microecology Institute, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
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25
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Abstract
Nephrolithiasis is a condition marked by the presence or formation of stones in kidneys. Several factors contribute to kidney stones development such as environmental conditions, type of dietary intake, gender and gastrointestinal flora. Most of the kidney stones are composed of calcium phosphate and calcium oxalate, which enter in to the body through diet. Both sources of oxalates become dangerous when normal flora of gastrointestinal tract is disturbed. Oxalobacter and Lactobacillus species exist symbiotically in the human gut and prevent stone formation by altering some biochemical pathways through production of specific enzymes which help in the degradation of oxalate salts. Both Oxalobacter and Lactobacillus have potential probiotic characteristics for the prevention of kidney stone formation and this avenue should be further explored.
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Affiliation(s)
- Humaira Sadaf
- Department of Biosciences, University of Wah, Wah City, Pakistan
| | - Syed Irfan Raza
- Department of Biosciences, University of Wah, Wah City, Pakistan
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26
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Thomason CA, Leon A, Kirkpatrick LT, Belden LK, Hawley DM. Eye of the Finch: characterization of the ocular microbiome of house finches in relation to mycoplasmal conjunctivitis. Environ Microbiol 2017; 19:1439-1449. [PMID: 27871125 PMCID: PMC6292521 DOI: 10.1111/1462-2920.13625] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 10/17/2016] [Accepted: 11/16/2016] [Indexed: 12/29/2022]
Abstract
Vertebrate ocular microbiomes are poorly characterized and virtually unexplored in wildlife species. Pathogen defense is considered a key function of microbiomes, but determining microbiome stability during disease is critical for understanding the role of resident microbial communities in infectious disease dynamics. Here, we characterize the ocular bacterial microbiome of house finches (Haemorhous mexicanus), prior to and during experimental infection with an inflammatory ocular disease, Mycoplasmal conjunctivitis, caused by Mycoplasma gallisepticum. In ocular tissues of healthy house finches, we identified 526 total bacterial operational taxonomic units (OTUs, 97% similarity), primarily from Firmicutes (92.6%) and Proteobacteria (6.9%), via 16S rRNA gene amplicon sequencing. Resident ocular communities of healthy female finches were characterized by greater evenness and phylogenetic diversity compared to healthy male finches. Regardless of sex, ocular microbiome community structure significantly shifted 11 days after experimental inoculation with M. gallisepticum. A suite of OTUs, including taxa from the genera Methylobacterium, Acinetobacter and Mycoplasma, appear to drive these changes, indicating that the whole finch ocular microbiome responds to infection. Further study is needed to quantify changes in absolute abundance of resident taxa and to elucidate potential functional roles of the resident ocular microbiome in mediating individual responses to this common songbird bacterial pathogen.
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Affiliation(s)
| | - Ariel Leon
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA
| | | | - Lisa K Belden
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Dana M Hawley
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA, USA
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27
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Carasi P, Racedo SM, Jacquot C, Elie AM, Serradell MDLÁ, Urdaci MC. Enterococcus durans EP1 a Promising Anti-inflammatory Probiotic Able to Stimulate sIgA and to Increase Faecalibacterium prausnitzii Abundance. Front Immunol 2017; 8:88. [PMID: 28239378 PMCID: PMC5300979 DOI: 10.3389/fimmu.2017.00088] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/19/2017] [Indexed: 12/21/2022] Open
Abstract
Enterococcus species, principally Enterococcus faecium are used as probiotics since a long time with preference in animal applications but safety considerations were updated and also new uses as probiotics can be envisaged. Fifteen Enterococcus strains isolated from different foods were identified and analyzed for virulence factors and antibiotic resistance. Three Enterococcus durans strains were selected to study their immunomodulatory properties on PBMC and Caco2 cells. Two strains presented a profile toward a mild inflammatory Th1 response considering TNF-α/IL-10 and IL-1β/IL-10 cytokines ratios. The third strain EP1, presented an anti-inflammatory potential and was selected for in vivo studies. In mice, the strain was well tolerated and did not cause any adverse effects. EP1 administration increased the amount of IgA+ cells in mesenteric lymph node (MLN) after 7 days of administration. In fecal samples, the IgA content increased gradually and significantly from day 7 to day 21 in treated group. Additionally, IL-17, IL-6, IL-1β, IFN-γ, and CXCL1 gene expression significantly decreased on day 21 in Peyer’s patches and IL-17 decreased in MLN. Mice treated with the probiotic showed significant lower mRNA levels of pro-inflammatory cytokines and mucins in the ileum at day 7 while their expression was normalized at day 21. Colonic expression of il-1β, il6, and mucins remain diminished at day 21. Ileum and colon explants from treated mice stimulated in vitro with LPS showed a significant reduction in IL-6 and an increase in IL-10 secretion suggesting an in vivo protective effect of the probiotic treatment against a proinflammatory stimulus. Interestingly, analysis of feces microbiota demonstrated that EP1 administration increase the amount of Faecalibacterium prausnitzii, a butyrate-producing bacteria, which is known for its anti-inflammatory effects. In conclusion, we demonstrated that EP1 strain is a strong sIgA inducer and possess mucosal anti-inflammatory properties. This strain also modulates gut microbiota increasing Faecalibacterium prausnitzii, a functionally important bacterium. Thus, E. durans EP1 is not only a good candidate to increases F. prausnitzii in some cases of dysbiosis but can also be interesting in gut inflammatory disorders therapy.
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Affiliation(s)
- Paula Carasi
- UMR 5248, Laboratoire de Microbiologie et Biochimie Appliquée (LBMA), Bordeaux Sciences Agro, Université de Bordeaux, Gradignan, France; Cátedra de Microbiología, Facultad de Ciencias Exactas, Departamento de Ciencias Biológicas, Universidad Nacional de La Plata (UNLP), La Plata, Argentina; CCT-La Plata, CONICET, La Plata, Argentina
| | - Silvia María Racedo
- UMR 5248, Laboratoire de Microbiologie et Biochimie Appliquée (LBMA), Bordeaux Sciences Agro, Université de Bordeaux , Gradignan , France
| | - Claudine Jacquot
- UMR 5248, Laboratoire de Microbiologie et Biochimie Appliquée (LBMA), Bordeaux Sciences Agro, Université de Bordeaux , Gradignan , France
| | - Anne Marie Elie
- UMR 5248, Laboratoire de Microbiologie et Biochimie Appliquée (LBMA), Bordeaux Sciences Agro, Université de Bordeaux , Gradignan , France
| | - María de Los Ángeles Serradell
- Cátedra de Microbiología, Facultad de Ciencias Exactas, Departamento de Ciencias Biológicas, Universidad Nacional de La Plata (UNLP), La Plata, Argentina; CCT-La Plata, CONICET, La Plata, Argentina
| | - María C Urdaci
- UMR 5248, Laboratoire de Microbiologie et Biochimie Appliquée (LBMA), Bordeaux Sciences Agro, Université de Bordeaux , Gradignan , France
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Guigas C, Faulhaber K, Duerbeck D, Neve H, Heller KJ. Prophage-mediated modulation of interaction of Streptococcus thermophilus J34 with human intestinal epithelial cells and its competition against human pathogens. Benef Microbes 2015; 7:289-97. [PMID: 26689226 DOI: 10.3920/bm2015.0108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The human intestinal microbiota plays an important role in human health. While adhesion to gastrointestinal mucosa is a prerequisite for colonisation, inhibition of adhesion is a property which may prevent or reduce infections by food borne pathogens. Streptococcus thermophilus and Lactobacillus delbrueckii subsp. bulgaricus represent the two lactic bacteria constituting the yoghurt culture. These starter cultures have been claimed to be probiotic. In our study we compared two S. thermophilus strains (i.e. lysogenic strain J34 and corresponding non-lysogenic [prophage-cured] strain J34-6), with respect to (1) their in vitro adhesion properties to HT29 cells and (2) their cell surface hydrophobicities. Effects of the two strains on inhibition of adhesion of the pathogens Listeria monocytogenes Scott A, Staphylococcus aureus 6732 and Salmonella enteritidis S489 were studied in vitro with HT29 cell cultures. Lysogenic strain J34 was shown to be considerably more effective than the non-lysogenic derivative strain J34-6.
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Affiliation(s)
- C Guigas
- 1 Department of Microbiology and Biotechnology, Max Rubner Institut (Federal Research Institute of Nutrition and Health), Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - K Faulhaber
- 2 Chair Organismic Interactions, Interfaculty Institute of Microbiology and Infection Medicine, Tübingen University, Geschwister-Scholl-Platz, 72074 Tübingen, Germany
| | - D Duerbeck
- 3 BAV-Institut für Hygiene und Qualitätssicherung, Hanns-Martin-Schleyer-Str. 25, 77656 Offenburg, Germany
| | - H Neve
- 1 Department of Microbiology and Biotechnology, Max Rubner Institut (Federal Research Institute of Nutrition and Health), Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
| | - K J Heller
- 1 Department of Microbiology and Biotechnology, Max Rubner Institut (Federal Research Institute of Nutrition and Health), Hermann-Weigmann-Straße 1, 24103 Kiel, Germany
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29
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Lu CY, Ni YH. Gut microbiota and the development of pediatric diseases. J Gastroenterol 2015; 50:720-6. [PMID: 25917564 DOI: 10.1007/s00535-015-1082-z] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Accepted: 04/09/2015] [Indexed: 02/07/2023]
Abstract
The human gut harbors a huge number of microbes, which are collectively named "microbiota." The dynamic composition of the human gut microbiota is determined by multiple factors, including mode of delivery, diet, environment, and antibiotics. A healthy gut microbiota is helpful to the host in many aspects, including providing nutrients, protection from pathogens, and maturation of immune responses. Dysbiosis plays important roles in various diseases in infancy and later life: necrotizing enterocolitis, inflammatory bowel disease, obesity, and atopic diseases are some examples. Studies of functional metagenomics by newly developed techniques, such as next-generation sequencing, will not only elucidate the molecular mechanisms underlying gut microbiota-host interactions but will also provide new possibilities for disease prevention and treatment.
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Affiliation(s)
- Chun-Yi Lu
- Department of Pediatrics, National Taiwan University Children's Hospital, 7 Chung-Shan S. Road, Taipei, Taiwan
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30
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Lactobacillus rhamnosus GG inhibits the toxic effects of Staphylococcus aureus on epidermal keratinocytes. Appl Environ Microbiol 2014; 80:5773-81. [PMID: 25015889 DOI: 10.1128/aem.00861-14] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Few studies have evaluated the potential benefits of the topical application of probiotic bacteria or material derived from them. We have investigated whether a probiotic bacterium, Lactobacillus rhamnosus GG, can inhibit Staphylococcus aureus infection of human primary keratinocytes in culture. When primary human keratinocytes were exposed to S. aureus, only 25% of the keratinocytes remained viable following 24 h of incubation. However, in the presence of 10(8) CFU/ml of live L. rhamnosus GG, the viability of the infected keratinocytes increased to 57% (P = 0.01). L. rhamnosus GG lysates and spent culture fluid also provided significant protection to keratinocytes, with 65% (P = 0.006) and 57% (P = 0.01) of cells, respectively, being viable following 24 h of incubation. Keratinocyte survival was significantly enhanced regardless of whether the probiotic was applied in the viable form or as cell lysates 2 h before or simultaneously with (P = 0.005) or 12 h after (P = 0.01) S. aureus infection. However, spent culture fluid was protective only if added before or simultaneously with S. aureus. With respect to mechanism, both L. rhamnosus GG lysate and spent culture fluid apparently inhibited adherence of S. aureus to keratinocytes by competitive exclusion, but only viable bacteria or the lysate could displace S. aureus (P = 0.04 and 0.01, respectively). Furthermore, growth of S. aureus was inhibited by either live bacteria or lysate but not spent culture fluid. Together, these data suggest at least two separate activities involved in the protective effects of L. rhamnosus GG against S. aureus, growth inhibition and reduction of bacterial adhesion.
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31
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Fang CY, Lu JR, Chen BJ, Wu C, Chen YP, Chen MJ. Selection of uremic toxin-reducing probiotics in vitro and in vivo. J Funct Foods 2014. [DOI: 10.1016/j.jff.2014.01.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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32
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Chapman CMC, Gibson GR, Rowland I. Effects of single- and multi-strain probiotics on biofilm formation and in vitro adhesion to bladder cells by urinary tract pathogens. Anaerobe 2014; 27:71-6. [PMID: 24583095 DOI: 10.1016/j.anaerobe.2014.02.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 01/29/2014] [Accepted: 02/17/2014] [Indexed: 12/14/2022]
Abstract
PURPOSE There is increasing evidence that probiotic bacteria can inhibit and/or prevent urinary tract infections. Possible mechanisms include prevention of adhesion of pathogens to the bladder epithelium and inhibition of biofilm formation. Currently there is interest in the comparative efficacy of single probiotics vs. strain mixtures. We have therefore tested the inhibitory activity of four single probiotics and four probiotic mixtures towards the urinary tract pathogens Escherichia coli NCTC 9001 and Enterococcus faecalis NCTC 00775. METHODS Inhibition of biofilm formation by cell-free supernatants was tested using the Crystal Violet assay, while prevention of pathogen adhesion to host cells was tested by using bladder cancer cells as a model for the human urinary tract. RESULTS Under pH-controlled conditions, there was no significant inhibition of biofilm formation by any treatment. Without pH control, 5/8 treatments significantly inhibited biofilm production by E. coli, while 5/8 treatments inhibited production by E. faecalis. Using data from all Crystal Violet assays, there was no significant difference in the ability of single- and multi-strain probiotics to inhibit biofilm formation. In the cell culture assays, all treatments were able to significantly reduce numbers of pathogenic cells adhering to host cells by 2.5-3.5 logs. No significant difference was observed between the displacement caused by single strains and mixtures for either pathogen. CONCLUSIONS Inhibition of biofilm seems to be a major mechanism of urinary tract pathogen exclusion, related to, and possibly dependent upon, the probiotic ability to reduce environmental pH. Exclusion via competition of binding sites is a possible in vivo mechanism for these probiotics. If an additive or synergistic effect exists between strains within a mixture, it does not manifest itself in a greater effect through these two inhibitory mechanisms.
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Affiliation(s)
- C M C Chapman
- Department of Food and Nutritional Sciences, University of Reading, P.O. Box 226, Whiteknights, Reading RG6 6AP, United Kingdom.
| | - G R Gibson
- Department of Food and Nutritional Sciences, University of Reading, P.O. Box 226, Whiteknights, Reading RG6 6AP, United Kingdom
| | - I Rowland
- Department of Food and Nutritional Sciences, University of Reading, P.O. Box 226, Whiteknights, Reading RG6 6AP, United Kingdom
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Abstract
INTRODUCTION Cancers of the gastrointestinal tract account for 25 % of all cancers and for 9 % of all causes of cancer death in the world, so gastrointestinal cancers represent a major health problem. In the past decades, an emerging role has been attributed to the interactions between the gastrointestinal content and the onset of neoplasia. METHODS Thus, exogenous microbial administration of peculiar bacterial strains (probiotics) has been suggested as having a profound influence on multiple processes associated with a change in cancer risk. Probiotics are mono or mixed cultures of live microorganisms that might beneficially affect the host by improving the characteristics of indigenous microflora. Although the effects of probiotic administration has been intensively investigated in vitro, in animal models, in healthy volunteers, and in some human gastrointestinal diseases, very little is still known about the possible cross-interactions among probiotic administration, changes of intestinal flora, and the neoplastic transformation of gastrointestinal mucosa. RESULTS Theoretically, probiotics are able to reduce cancer risk by a number of mechanisms: (a) binding and degradation of potential carcinogens; (b) quantitative, qualitative and metabolic alterations of the intestinal microflora; (c) production of anti-tumorigenic or anti-mutagenic compounds; (d) competitive action towards pathogenic bacteria; (e) enhancement of the host's immune response; (f) direct effects on cell proliferation. CONCLUSION This review will attempt to highlight the literature on the most widely recognized effects of probiotics against neoplastic transformation of gastrointestinal mucosa and in particular on their effects on cell proliferation.
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Affiliation(s)
- Antonella Orlando
- Laboratory of Experimental Biochemistry, National Institute for Digestive Diseases, IRCCS S de Bellis, Via Turi 27, 70013 Castellana Grotte, Bari, Italy
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34
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Abstract
Lactobacilli are a subdominant component of the human intestinal microbiota that are also found in other body sites, certain foods, and nutrient-rich niches in the free environment. They represent the types of microorganisms that mammalian immune systems have learned not to react to, which is recognized as a potential driving force in the evolution of the human immune system. Co-evolution of lactobacilli and animals provides a rational basis to postulate an association with health benefits. To further complicate a description of their host interactions, lactobacilli may rarely cause opportunistic infections in compromised subjects. In this review, we focus primarily on human-Lactobacillus interactions. We overview the microbiological complexity of this extraordinarily diverse genus, we describe where lactobacilli are found in or on humans, what responses their presence elicits, and what microbial interaction and effector molecules have been identified. The rare cases of Lactobacillus septicaemia are explained in terms of the host impairment required for such an outcome. We discuss possibilities for exploitation of lactobacilli for therapeutic delivery and mucosal vaccination.
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35
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A disposable electrochemical immunosensor arrays using 4-channel screen-printed carbon electrode for simultaneous detection of Escherichia coli O157:H7 and Enterobacter sakazakii. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.02.136] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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36
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Bletz MC, Loudon AH, Becker MH, Bell SC, Woodhams DC, Minbiole KPC, Harris RN. Mitigating amphibian chytridiomycosis with bioaugmentation: characteristics of effective probiotics and strategies for their selection and use. Ecol Lett 2013; 16:807-20. [PMID: 23452227 DOI: 10.1111/ele.12099] [Citation(s) in RCA: 191] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Revised: 11/28/2012] [Accepted: 02/04/2013] [Indexed: 12/17/2022]
Abstract
Probiotic therapy through bioaugmentation is a feasible disease mitigation strategy based on growing evidence that microbes contribute to host defences of plants and animals. Amphibians are currently threatened by the rapid global spread of the pathogen, Batrachochytrium dendrobatidis (Bd), which causes the disease chytridiomycosis. Bioaugmentation of locally occurring protective bacteria on amphibians has mitigated this disease effectively in laboratory trials and one recent field trial. Areas still naïve to Bd provide an opportunity for conservationists to proactively implement probiotic strategies to prevent further amphibian declines. In areas where Bd is endemic, bioaugmentation can facilitate repatriation of susceptible amphibians currently maintained in assurance colonies. Here, we synthesise the current research in amphibian microbial ecology and bioaugmentation to identify characteristics of effective probiotics in relation to their interactions with Bd, their host, other resident microbes and the environment. To target at-risk species and amphibian communities, we develop sampling strategies and filtering protocols that result in probiotics that inhibit Bd under ecologically relevant conditions and persist on susceptible amphibians. This filtering tool can be used proactively to guide amphibian disease mitigation and can be extended to other taxa threatened by emerging infectious diseases.
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Affiliation(s)
- Molly C Bletz
- Department of Biology, James Madison University, Harrisonburg, VA, USA
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37
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Bravo JA, Julio-Pieper M, Forsythe P, Kunze W, Dinan TG, Bienenstock J, Cryan JF. Communication between gastrointestinal bacteria and the nervous system. Curr Opin Pharmacol 2012; 12:667-72. [PMID: 23041079 DOI: 10.1016/j.coph.2012.09.010] [Citation(s) in RCA: 156] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 07/20/2012] [Accepted: 09/19/2012] [Indexed: 12/26/2022]
Abstract
In the past few years, intestinal microbiota has emerged as a novel target for the treatment of gut-brain axis alterations. These include functional gastrointestinal disorders, such as irritable bowel syndrome (IBS), which can be comorbid with stress-related psychiatric conditions. Thus, modulation of the microbiota (e.g. with the use of probiotics) could be proposed as a novel strategy not only for the treatment of IBS but also as an adjuvant for psychiatric treatment of anxiety and depression.
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Affiliation(s)
- Javier A Bravo
- Instituto de Química, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile.
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38
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Chapman C, Gibson G, Rowland I. In vitro evaluation of single- and multi-strain probiotics: Inter-species inhibition between probiotic strains, and inhibition of pathogens. Anaerobe 2012; 18:405-13. [DOI: 10.1016/j.anaerobe.2012.05.004] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Revised: 04/24/2012] [Accepted: 05/27/2012] [Indexed: 11/25/2022]
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Structural modification of the gastrointestinal epithelium during immune-dependent granulomatosis. Bull Exp Biol Med 2012; 150:490-4. [PMID: 22268051 DOI: 10.1007/s10517-011-1176-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
We present results of pathomorphological study of the mucosa epithelium in various parts of the gastrointestinal tract in Crohn's disease. Particular attention was paid to structural transformation of epithelial cells. Barrier dysfunction of the gastrointestinal mucosa was shown to be one of the major pathogenetic factors for Crohn's disease.
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Azcárate-Peril MA, Sikes M, Bruno-Bárcena JM. The intestinal microbiota, gastrointestinal environment and colorectal cancer: a putative role for probiotics in prevention of colorectal cancer? Am J Physiol Gastrointest Liver Physiol 2011; 301:G401-24. [PMID: 21700901 PMCID: PMC3774253 DOI: 10.1152/ajpgi.00110.2011] [Citation(s) in RCA: 159] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Colorectal cancer (CRC) is the third most commonly diagnosed cancer in the United States, and, even though 5-15% of the total CRC cases can be attributed to individual genetic predisposition, environmental factors could be considered major factors in susceptibility to CRC. Lifestyle factors increasing the risks of CRC include elevated body mass index, obesity, and reduced physical activity. Additionally, a number of dietary elements have been associated with higher or lower incidence of CRC. In this context, it has been suggested that diets high in fruit and low in meat might have a protective effect, reducing the incidence of colorectal adenomas by modulating the composition of the normal nonpathogenic commensal microbiota. In addition, it has been demonstrated that changes in abundance of taxonomic groups have a profound impact on the gastrointestinal physiology, and an increasing number of studies are proposing that the microbiota mediates the generation of dietary factors triggering colon cancer. High-throughput sequencing and molecular taxonomic technologies are rapidly filling the knowledge gaps left by conventional microbiology techniques to obtain a comprehensive catalog of the human intestinal microbiota and their associated metabolic repertoire. The information provided by these studies will be essential to identify agents capable of modulating the massive amount of gut bacteria in safe noninvasive manners to prevent CRC. Probiotics, defined as "live microorganisms which, when administered in adequate amounts, confer a health benefit on the host" (219), are capable of transient modulation of the microbiota, and their beneficial effects include reinforcement of the natural defense mechanisms and protection against gastrointestinal disorders. Probiotics have been successfully used to manage infant diarrhea, food allergies, and inflammatory bowel disease; hence, the purpose of this review was to examine probiotic metabolic activities that may have an effect on the prevention of CRC by scavenging toxic compounds or preventing their generation in situ. Additionally, a brief consideration is given to safety evaluation and production methods in the context of probiotics efficacy.
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Affiliation(s)
- M. Andrea Azcárate-Peril
- 1Department of Cell and Molecular Physiology, University of North Carolina School of Medicine, Chapel Hill;
| | - Michael Sikes
- 2Department of Microbiology, North Carolina State University, Raleigh, North Carolina
| | - José M. Bruno-Bárcena
- 2Department of Microbiology, North Carolina State University, Raleigh, North Carolina
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Health benefits of probiotics: are mixtures more effective than single strains? Eur J Nutr 2011; 50:1-17. [PMID: 21229254 DOI: 10.1007/s00394-010-0166-z] [Citation(s) in RCA: 280] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Accepted: 12/28/2010] [Indexed: 12/15/2022]
Abstract
PURPOSE Most studies on probiotics utilise single strains, sometimes incorporated into yoghurts. There are fewer studies on efficacy of mixtures of probiotic strains. This review examines the evidence that (a) probiotic mixtures are beneficial for a range of health-related outcomes and (b) mixtures are more or less effective than their component strains administered separately. RESULTS Mixtures of probiotics had beneficial effects on the end points including irritable bowel syndrome and gut function, diarrhoea, atopic disease, immune function and respiratory tract infections, gut microbiota modulation, inflammatory bowel disease and treatment of Helicobacter pylori infection. However, only 16 studies compared the effect of a mixture with that of its component strains separately, although in 12 cases (75%), the mixture was more effective. CONCLUSION Probiotic mixtures appear to be effective against a wide range of end points. Based on a limited number of studies, multi-strain probiotics appear to show greater efficacy than single strains, including strains that are components of the mixtures themselves. However, whether this is due to synergistic interactions between strains or a consequence of the higher probiotic dose used in some studies is at present unclear.
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In vitro screening of probiotic lactic acid bacteria and prebiotic glucooligosaccharides to select effective synbiotics. Anaerobe 2010; 16:493-500. [DOI: 10.1016/j.anaerobe.2010.07.005] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 07/07/2010] [Accepted: 07/20/2010] [Indexed: 11/20/2022]
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Robinson CJ, Bohannan BJM, Young VB. From structure to function: the ecology of host-associated microbial communities. Microbiol Mol Biol Rev 2010; 74:453-76. [PMID: 20805407 PMCID: PMC2937523 DOI: 10.1128/mmbr.00014-10] [Citation(s) in RCA: 250] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
In the past several years, we have witnessed an increased interest in understanding the structure and function of the indigenous microbiota that inhabits the human body. It is hoped that this will yield novel insight into the role of these complex microbial communities in human health and disease. What is less appreciated is that this recent activity owes a great deal to the pioneering efforts of microbial ecologists who have been studying communities in non-host-associated environments. Interactions between environmental microbiologists and human microbiota researchers have already contributed to advances in our understanding of the human microbiome. We review the work that has led to these recent advances and illustrate some of the possible future directions for continued collaboration between these groups of researchers. We discuss how the application of ecological theory to the human-associated microbiota can lead us past descriptions of community structure and toward an understanding of the functions of the human microbiota. Such an approach may lead to a shift in the prevention and treatment of human diseases that involves conservation or restoration of the normal community structure and function of the host-associated microbiota.
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Affiliation(s)
- Courtney J. Robinson
- Department of Internal Medicine, Division of Infectious Diseases, Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan 48109, Center for Ecology and Evolutionary Biology, University of Oregon, Eugene, Oregon 97403
| | - Brendan J. M. Bohannan
- Department of Internal Medicine, Division of Infectious Diseases, Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan 48109, Center for Ecology and Evolutionary Biology, University of Oregon, Eugene, Oregon 97403
| | - Vincent B. Young
- Department of Internal Medicine, Division of Infectious Diseases, Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan 48109, Center for Ecology and Evolutionary Biology, University of Oregon, Eugene, Oregon 97403
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Healy B, Cooney S, O'Brien S, Iversen C, Whyte P, Nally J, Callanan JJ, Fanning S. Cronobacter (Enterobacter sakazakii): an opportunistic foodborne pathogen. Foodborne Pathog Dis 2010; 7:339-50. [PMID: 19958103 DOI: 10.1089/fpd.2009.0379] [Citation(s) in RCA: 196] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Cronobacter spp. (Enterobacter sakazakii) are a recently described genus that is comprised of six genomospecies. The classification of these organisms was revised based on a detailed polyphasic taxonomic study. Cronobacter spp. are regarded as ubiquitous organisms having been isolated from a wide variety of foods. These bacteria are opportunistic pathogens and are linked with life-threatening infections in neonates. Clinical symptoms of Cronobacter infection include necrotizing enterocolitis, bacteremia, and meningitis, with case fatality rates of 50-80% being reported. Contaminated powdered infant formula has been epidemiologically linked with infections. Recently, infections among immunocompromised adults, mainly the elderly, have also been reported. A high tolerance to osmotic stress and elevated temperatures contribute to the survival of Cronobacter spp. in dried foods such as powdered infant formula. Controlling the organism in the production environment, thereby reducing dissemination, necessitates the provision of suitable diagnostic tools. Studies demonstrated that a high degree of variability exists amongst the phenotypic-based methods used to identify Cronobacter spp. However, advances in molecular detection and subtyping techniques have significantly improved the identification and characterization of Cronobacter spp. The dose required to induce infection has yet to be determined. In vitro virulence studies have shown that Cronobacter spp. may survive in macrophage cells and efficiently attach to and invade epithelial cell lines. The production of exopolysaccharide may contribute to the formation of biofilm and active efflux pumps promote resistance to antimicrobial agents such as bile salts and disinfectants. A holistic approach combining techniques such as comparative genome analysis, proteomics, and in vivo challenges could help unravel the complex interactions between this pathogen and its host. These data would help identify those properties in Cronobacter spp. which enable the bacterium to survive in the production environment and infect vulnerable neonates via the food chain.
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Affiliation(s)
- Brendan Healy
- Centres for Food Safety and Foodborne Zoonomics, School of Agriculture, Food Science, and Veterinary Medicine, University College Dublin, Belfield, Dublin, Ireland
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Salminen S, Nybom S, Meriluoto J, Collado MC, Vesterlund S, El-Nezami H. Interaction of probiotics and pathogens--benefits to human health? Curr Opin Biotechnol 2010; 21:157-67. [PMID: 20413293 DOI: 10.1016/j.copbio.2010.03.016] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2010] [Revised: 03/22/2010] [Accepted: 03/22/2010] [Indexed: 01/16/2023]
Abstract
The probiotic terminology has matured over the years and currently a unified definition has been formed. Lactic acid bacteria (LAB) and bifidobacteria have been reported to remove heavy metals, cyanotoxins and mycotoxins from aqueous solutions. The binding processes appear to be species and strain specific. The most efficient microbial species and strains in the removal of these compounds vary between components tested. However, it is of interest to note that most strains characterized until now do not bind positive components or nutrients in the diet. This has significant implications to future detoxification biotechnology development. In a similar manner, lactic acid bacteria and bifidobacteria interact directly with viruses and pathogens in food and water as well as toxin producing microbes and some toxins. This review updates information and aims to characterize these interactions in association. The target is to understand probiotic health effects and to relate the mechanisms and actions to future potential of specific probiotic bacteria on decontamination of foods and water, and diets. The same aim is targeted in characterizing the role of probiotics in inactivating pathogens and viruses of health importance to facilitate the establishment of novel means of disease risk reduction related health benefits.
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Affiliation(s)
- Seppo Salminen
- Functional Foods Forum, University of Turku, 20014 Turku, Finland.
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Functional cell models of the gut and their applications in food microbiology--a review. Int J Food Microbiol 2010; 141 Suppl 1:S4-14. [PMID: 20444515 PMCID: PMC7173225 DOI: 10.1016/j.ijfoodmicro.2010.03.026] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2009] [Revised: 03/17/2010] [Accepted: 03/18/2010] [Indexed: 02/08/2023]
Abstract
Animal experimentation has a long tradition for risk assessment of new drugs before they reach the clinic. To reduce expensive animal experimentation, attempts have been made to build inexpensive and convenient intestinal functional cell models to study toxicity and bioavailability of new substances along with providing relevant models to study interactions between the host, pathogens and intestinal microflora. We review the available cell lines and models of the intestine and their potential uses. Tumor derived cell lines such as Caco-2, T84 and HT-29 are widely used despite many drawbacks, which are discussed with respect to complexity of the gut, where various cell types interact with commensal microbiota and gut-associated lymphoid tissue. To address this complexity, 3D models of human and animal gut represent a promising in vitro system to mimic in vivo situation without the use of transformed cell lines.
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Hol J, de Jongste JC, Nieuwenhuis EE. Quoting a landmark paper on the beneficial effects of probiotics. J Allergy Clin Immunol 2010; 124:1354-6.e9. [PMID: 19818483 DOI: 10.1016/j.jaci.2009.07.047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2009] [Revised: 07/21/2009] [Accepted: 07/23/2009] [Indexed: 02/06/2023]
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Kubota A, He F, Kawase M, Harata G, Hiramatsu M, Salminen S, Iino H. Lactobacillus strains stabilize intestinal microbiota in Japanese cedar pollinosis patients. Microbiol Immunol 2009; 53:198-205. [PMID: 19714856 DOI: 10.1111/j.1348-0421.2009.00113.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A randomized double-blind, placebo-controlled trial was conducted to ascertain the intestinal microbiota-altering properties of LGG and L. gasseri TMC0356 (TMC0356) in Japanese cedar Cryptomeria japonica pollinosis patients. Fecal bacteria communities were examined before and after fermented milk administration using culture, FISH and T-RFLPmethods. Test group subjects showed the presence of LGG and TMC0356 along with a significant increase in fecal lactobacilli (P < 0.001) after giving LGG and TMC0356 fermented milk. Culture and FISH analysis revealed no significant changes in other intestinal bacterial groups. Each subject exhibited a characteristic T-RFLP profile pattern that varied quantitatively and qualitatively with JCP shedding. Profile changes were observed in 53% of placebo group subjects and in 21% of test group subject's post-administration, indicating that LGG and TMC0356 suppressed intestinal microbiota changes in JCPsis patients. The results suggest that intestinal microbiota might be more sensitive to exposure to environmental allergens than expected from the results of general culture method studies. Stabilization of intestinal microbiota by selected probiotic strains such as LGG and TMC0356 could be beneficial to homeostasis of the intestinal microbiota and useful in the management of JCPsis.
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Affiliation(s)
- Akira Kubota
- Technical Research Laboratory, Takanashi Milk Products Co., Ltd, Yokohama, Kanagawa 241-0023, Japan
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Twetman L, Larsen U, Fiehn NE, Stecksén-Blicks C, Twetman S. Coaggregation between probiotic bacteria and caries-associated strains: an in vitro study. Acta Odontol Scand 2009; 67:284-8. [PMID: 19479452 DOI: 10.1080/00016350902984237] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
OBJECTIVE To evaluate the in vitro abilities of probiotic bacteria derived from consumer products to coaggregate with caries-associated mutans streptococci. MATERIAL AND METHODS Six lactobacillus strains (L. acidophilus (CCUG 5917), L. plantarum 299v, L. rhamnosus GG and LB21, L. paracasei F19, L. reuteri PTA5289) were cultivated under anaerobic conditions at 37°C in Man Rogosa Sharpe (MSB) broth for 24 h. Four strains of human streptococci (S. mutans Ingbritt, S. mutans (ATCC 25175), S. mutans GS-5, S. sobrinus (ATCC 33478) were similarly grown in Brain Heart Infusion (BHI) broth. A gastrointestinal pathogen (Escherichia coli) was aerobically cultivated on BHI broth as a positive control. After incubation, the bacteria were aerobically harvested, washed, and suspended in 10 mmol/l phosphate-buffered saline (pH 7.2). The probiotic strains were characterized with the API 50 CH system to confirm their identity. Coaggregation was determined by spectrophotometry in mixtures and bacterial suspensions alone after 1, 2, 4, and 24 h and expressed as the aggregation ratio (%). RESULTS All probiotic strains showed coaggregation abilities with the oral pathogens and the results were strain specific and dependent on time. S. mutans GS-5 exhibited a significantly higher ability to coaggregate with all the probiotic strains than the other mutans streptococci and E. coli. The differences among the probiotic strains were modest with L. acidophilus being the most prone and L. rhamnosus LB21 the least prone to coaggregate with the oral streptococci. CONCLUSIONS The results demonstrated different abilities of lactobacilli-derived probiotic bacteria to coaggregate with selected oral streptococci. Aggregation assays may be a useful complement for screening of probiotic candidates with possible anti-caries properties.
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Corr SC, Hill C, Gahan CGM. Understanding the mechanisms by which probiotics inhibit gastrointestinal pathogens. ADVANCES IN FOOD AND NUTRITION RESEARCH 2009; 56:1-15. [PMID: 19389605 DOI: 10.1016/s1043-4526(08)00601-3] [Citation(s) in RCA: 101] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In recent years, there has been a growing interest in the use of probiotic bacteria for the maintenance of general gastrointestinal health and the prevention or treatment of intestinal infections. Whilst probiotics are documented to reduce or prevent specific infectious diseases of the GI tract, the mechanistic basis of this effect remains unclear. It is likely that diverse modes-of-action contribute to inhibition of pathogens in the gut environment and proposed mechanisms include (i) direct antimicrobial activity through production of bacteriocins or inhibitors of virulence gene expression; (ii) competitive exclusion by competition for binding sites or stimulation of epithelial barrier function; (iii) stimulation of immune responses via increases of sIgA and anti-inflammatory cytokines and regulation of proinflammatory cytokines; and (iv) inhibition of virulence gene or protein expression in gastrointestinal pathogens. In this review, we discuss the modes of action by which probiotic bacteria may reduce gastrointestinal infections, and highlight some recent research which demonstrates the mechanistic basis of probiotic cause and effect.
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Affiliation(s)
- Sinead C Corr
- Department of Biochemistry and Immunology, Trinity College Dublin, Ireland
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