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Grabner F M, Grabner H M, Schein H, Schrank A, Töglhofer M, Weidenholzer E, Rückert-Reed C, Busche T, Buchebner-Jance M. Lacticaseibacillus parahuelsenbergensis sp. nov., Lacticaseibacillus styriensis sp. nov. and Lacticaseibacillus zeae subsp. silagei subsp. nov., isolated from different grass and corn silage. Int J Syst Evol Microbiol 2024; 74. [PMID: 38954457 DOI: 10.1099/ijsem.0.006441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/04/2024] Open
Abstract
Four rod-shaped, non-motile, non-spore-forming, facultative anaerobic, Gram-stain-positive lactic acid bacteria, designated as EB0058T, SCR0080, LD0937T and SCR0063T, were isolated from different corn and grass silage samples. The isolated strains were characterized using a polyphasic approach and EB0058T and SCR0080 were identified as Lacticaseibacillus zeae by 16S rRNA gene sequence analysis. Based on whole-genome sequence-based characterization, EB0058T and SCR0080 were separated into a distinct clade from Lacticaseibacillus zeae DSM 20178T, together with CECT9104 and UD2202, whose genomic sequences are available from NCBI GenBank. The average nucleotide identity (ANI) values within the new subgroup are 99.9 % and the digital DNA-DNA hybridization (dDDH) values are 99.3-99.9 %, respectively. In contrast, comparison of the new subgroup with publicly available genomic sequences of L. zeae strains, including the type strain DSM 20178T, revealed dDDH values of 70.2-72.5 % and ANI values of 96.2-96.6 %. Based on their chemotaxonomic, phenotypic and phylogenetic characteristics, EB0058T and SCR0080 represent a new subspecies of L. zeae. The name Lacticaseibacillus zeae subsp. silagei subsp. nov. is proposed with the type strain EB0058T (=DSM 116376T=NCIMB 15474T). According to the results of 16S rRNA gene sequencing, LD0937T and SCR0063T are members of the Lacticaseibacillus group. The dDDH value between the isolates LD0937T and SCR0063T was 67.6 %, which is below the species threshold of 70 %, clearly showing that these two isolates belong to different species. For both strains, whole genome-sequencing revealed that the closest relatives within the Lacticaseibacillus group were Lacticaseibacillus huelsenbergensis DSM 115425 (dDDH 66.5 and 65.9 %) and Lacticaseibacillus casei DSM 20011T (dDDH 64.1 and 64.9 %). Based on the genomic, chemotaxonomic and morphological data obtained in this study, two novel species, Lacticaseibacillus parahuelsenbergensis sp. nov. and Lacticaseibacillus styriensis sp. nov. are proposed and the type strains are LD0937T (=DSM 116105T=NCIMB 15471T) and SCR0063T (=DSM 116297T=NCIMB 15473T), respectively.
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Affiliation(s)
- Monika Grabner F
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | - Monika Grabner H
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | - Hermine Schein
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | - Andrea Schrank
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | - Manuela Töglhofer
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | | | | | - Tobias Busche
- Omics Core Facility NGS, Medical School OWL & CBTec, Bielefeld University, Bielefeld, Germany
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Asha MN, Chowdhury MSR, Hossain H, Rahman MA, Emon AA, Tanni FY, Islam MR, Hossain MM, Rahman MM. Antibacterial potential of lactic acid bacteria isolated from raw cow milk in Sylhet district, Bangladesh: A molecular approach. Vet Med Sci 2024; 10:e1463. [PMID: 38659354 PMCID: PMC11043669 DOI: 10.1002/vms3.1463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 03/25/2024] [Accepted: 04/07/2024] [Indexed: 04/26/2024] Open
Abstract
BACKGROUND The most prevalent probiotic bacterium employed in the food industry is Lactobacillus because it can produce metabolites with antibacterial capabilities and exhibits hostility towards infections and microorganisms that cause spoilage. AIM This study set out to identify naturally occurring Lactobacillus and plantaricin (pln EF) coding genes in raw cow milk and to assess the antibacterial potency of isolated Lactobacillus isolates. METHODS Following enrichment in De Man, Rogosa and Sharpe (MRS) broth, single colonies were isolated, and pure colonies were obtained by streaking on MRS agar. The 16S rRNA gene was amplified using polymerase chain reaction (PCR) to confirm the cultural positivity of all isolates. Additionally, the presence of plantaricin was verified by targeting the pln EF gene through PCR. OUTCOME Out of the 166 raw milk specimens acquired from cows, 153 (91.17%; CI: 86.98-95.76) were identified as positive for Lactobacillus through both culture and biochemical screening. Subsequently, 121 (72.89%; CI: 65.46-79.49) of the isolates were affirmed to harbour Lactobacillus through PCR analysis. Within this subset, 6 isolates (4.96%; CI: 1.84-10.48) were found to possess the plnEF gene. When exposed to Lactobacillus isolates, Salmonella Typhimurium and Salmonella enterica displayed an average maximum zone of inhibition with a diameter measuring 24 mm. In contrast, Escherichia coli exhibited an average minimum zone of inhibition, featuring a diameter of 11 mm. Additionally, the Lactobacillus isolates demonstrated inhibitory zones against Staphylococcus aureus, Klebsiella pneumoniae and Klebsiella oxytoca, measuring 14, 22 and 19 mm, respectively. CLINICAL SIGNIFICANCE Lactic acid bacteria, particularly Lactobacilli, are plentiful in cow milk and possess broad-spectrum antibacterial properties.
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Affiliation(s)
- Mashuka Nahida Asha
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Md. Shahidur Rahman Chowdhury
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Hemayet Hossain
- Department of Anatomy and HistologyFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Md. Anisur Rahman
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Ahsan Al Emon
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Fatema Yeasmin Tanni
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Md. Rafiqul Islam
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Md. Mukter Hossain
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
| | - Md. Mahfujur Rahman
- Department of MedicineFaculty of VeterinaryAnimal and Biomedical SciencesSylhet Agricultural UniversitySylhetBangladesh
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Chen YW, Hou YW, Wang CW, Cheng SJ, Kuo WT, Lin CP, Hou HH. Oral Lactobacillus zeae exacerbates the pathological manifestation of periodontitis in a mouse model. Mol Oral Microbiol 2024. [PMID: 38385832 DOI: 10.1111/omi.12455] [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: 10/11/2023] [Revised: 01/19/2024] [Accepted: 01/29/2024] [Indexed: 02/23/2024]
Abstract
INTRODUCTION The worldwide prevalence of periodontitis is considerably high, and its pathogenic mechanisms must be investigated and understood in order to improve clinical treatment outcomes and reduce the disease prevalence and burden. The exacerbation of the host immune system induced by oral microbial dysbiosis and the subsequent tissue destruction are the hallmarks of the periodontitis. However, the oral bacteria involved in periodontitis are not fully understood. We used the Oxford Nanopore Technologies (ONT) sequencing system to analyze metagenomic information in subgingival dental plaque from periodontitis and non-periodontitis patients. The number of Lactobacillus zeae (L. zeae) in the periodontitis patients was 17.55-fold higher than in the non-periodontitis patients, suggesting that L. zeae is a novel periodontitis-associated pathogen. Although several Lactobacillus species are used in vivo as probiotics to treat periodontitis and compete with Porphyromonas gingivalis (P. gingivalis), the roles of L. zeae in periodontitis progression, and the relationship between L. zeae and P. gingivalis needs to be investigated. METHODS Both L. zeae and P. gingivalis were inoculated in the ligature-implant site of periodontitis mice. We collected mouse gingival crevicular fluid to analyze inflammatory cytokine secretion using a multiplex assay. Intact or sliced mouse maxilla tissue was used for micro-computed tomography analysis or hematoxylin and eosin staining, immunohistochemistry, and tartrate-resistant acid phosphatase staining to evaluate alveolar bone loss, neutrophil infiltration, and osteoclast activation, respectively. RESULTS We observed that L. zeae competed with P. gingivalis, and it increased inflammatory cytokine secretion at the ligature-implant site. Similar to P. gingivalis, L. zeae promoted ligature-induced neutrophile infiltration, osteoclast activation, and alveolar bone loss. DISCUSSION We, therefore, concluded that L. zeae accelerated the progression of periodontitis in the ligature-induced periodontitis mouse model.
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Affiliation(s)
- Yi-Wen Chen
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Yu-Wen Hou
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Chuang-Wei Wang
- Department of Dermatology, Drug Hypersensitivity Clinical and Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan
| | - Shih-Jung Cheng
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Wei-Ting Kuo
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Chun-Pin Lin
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
| | - Hsin-Han Hou
- Department of Dentistry, National Taiwan University Hospital, Taipei, Taiwan
- Graduate Institute of Clinical Dentistry, School of Dentistry, National Taiwan University, Taipei, Taiwan
- Graduate Institute of Oral Biology, School of Dentistry, National Taiwan University, Taipei, Taiwan
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Tynybayeva I, Tekebayeva Z, Bissenova G, Mynbayeva M, Sarmurzina Z. Multilocus genotyping for classification and genetic structuring of Lactobacillus casei: insights from source and geographical origin. World J Microbiol Biotechnol 2024; 40:93. [PMID: 38349588 DOI: 10.1007/s11274-024-03898-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Accepted: 01/12/2024] [Indexed: 02/15/2024]
Abstract
The aim of the study in this article is to systematise the newly introduced strains of Lactobacillus based on determining the nucleotide sequence of a particular set of their genes (loci). The primary approach employed to address this issue involves conducting a laboratory experiment. During this experiment, a thorough examination was carried out on a set of organic compounds consisting of small DNA elements from the Lactobacillus genus. The Multilocus genotyping method served as the central technique, complemented by additional molecular-biological and population methods. These additional methods were utilized to determine the extent of phylogenetic similarity among pure cultures of Lactobacillus and to classify them accordingly. The article presents the gene isolates that were used for Multilocus typing; the number of L. casei isolates suitable for Multilocus genotyping was revealed; the gene alleles that allowed classifying L. casei isolates into five sequencing types were revealed; the effectiveness of genetic typing method for Multilocus sequencing was substantiated. The article is of practical value for microbiologists and geneticists in the field of molecular biology, as well as for technologists in the food industry. With the development of applied methods in genetic systematics, it has become possible to study pure culture of Lactobacillus species. The application of modern methods of genotypic classification of Lactobacillus species will make it possible to increase the efficiency of using better and safer products in the food industry and medicine.
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Affiliation(s)
- Indira Tynybayeva
- Laboratory of Genetics and Biochemistry of Microorganisms, Republican Collection of Microorganisms, Astana, 010000, Republic of Kazakhstan.
| | - Zhanar Tekebayeva
- Laboratory of Microbiology, Republican Collection of Microorganisms, Astana, 010000, Republic of Kazakhstan
| | - Gulmira Bissenova
- Laboratory of Microbiology, Republican Collection of Microorganisms, Astana, 010000, Republic of Kazakhstan
| | - Maryana Mynbayeva
- Laboratory of Biotechnology, Astana Bioscience Business Centre LLP, Astana, 010000, Republic of Kazakhstan
| | - Zinigul Sarmurzina
- Center for Study of Antibiotics and Secondary Metabolites, Republican Collection of Microorganisms, Astana, 010000, Republic of Kazakhstan
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5
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Contente D, Díaz-Formoso L, Feito J, Hernández PE, Muñoz-Atienza E, Borrero J, Poeta P, Cintas LM. Genomic and Functional Evaluation of Two Lacticaseibacillus paracasei and Two Lactiplantibacillus plantarum Strains, Isolated from a Rearing Tank of Rotifers ( Brachionus plicatilis), as Probiotics for Aquaculture. Genes (Basel) 2024; 15:64. [PMID: 38254954 PMCID: PMC10815930 DOI: 10.3390/genes15010064] [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: 11/06/2023] [Revised: 12/21/2023] [Accepted: 12/30/2023] [Indexed: 01/24/2024] Open
Abstract
Aquaculture plays a crucial role in meeting the increasing global demand for food and protein sources. However, its expansion is followed by increasing challenges, such as infectious disease outbreaks and antibiotic misuse. The present study focuses on the genetic and functional analyses of two Lacticaseibacillus paracasei (BF3 and RT4) and two Lactiplantibacillus plantarum (BF12 and WT12) strains isolated from a rotifer cultivation tank used for turbot larviculture. Whole-genome sequencing (WGS) and bioinformatics analyses confirmed their probiotic potential, the absence of transferable antibiotic resistance genes, and the absence of virulence and pathogenicity factors. Bacteriocin mining identified a gene cluster encoding six plantaricins, suggesting their role in the antimicrobial activity exerted by these strains. In vitro cell-free protein synthesis (IV-CFPS) analyses was used to evaluate the expression of the plantaricin genes. The in vitro-synthesized class IIb (two-peptide bacteriocins) plantaricin E/F (PlnE/F) exerted antimicrobial activity against three indicator microorganisms, including the well-known ichthyopathogen Lactococcus garvieae. Furthermore, MALDI-TOF MS on colonies detected the presence of a major peptide that matches the dimeric form of plantaricins E (PlnE) and F (PlnF). This study emphasizes the importance of genome sequencing and bioinformatic analysis for evaluating aquaculture probiotic candidates. Moreover, it provides valuable insights into their genetic features and antimicrobial mechanisms, paving the way for their application as probiotics in larviculture, which is a major bottleneck in aquaculture.
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Affiliation(s)
- Diogo Contente
- Grupo de Seguridad y Calidad de los Alimentos por Bacterias Lácticas, Bacteriocinas y Probióticos (SEGABALBP), Sección Departamental de Nutrición y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.C.); (L.D.-F.); (P.E.H.); (E.M.-A.); (J.B.); (L.M.C.)
| | - Lara Díaz-Formoso
- Grupo de Seguridad y Calidad de los Alimentos por Bacterias Lácticas, Bacteriocinas y Probióticos (SEGABALBP), Sección Departamental de Nutrición y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.C.); (L.D.-F.); (P.E.H.); (E.M.-A.); (J.B.); (L.M.C.)
| | - Javier Feito
- Grupo de Seguridad y Calidad de los Alimentos por Bacterias Lácticas, Bacteriocinas y Probióticos (SEGABALBP), Sección Departamental de Nutrición y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.C.); (L.D.-F.); (P.E.H.); (E.M.-A.); (J.B.); (L.M.C.)
| | - Pablo E. Hernández
- Grupo de Seguridad y Calidad de los Alimentos por Bacterias Lácticas, Bacteriocinas y Probióticos (SEGABALBP), Sección Departamental de Nutrición y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.C.); (L.D.-F.); (P.E.H.); (E.M.-A.); (J.B.); (L.M.C.)
| | - Estefanía Muñoz-Atienza
- Grupo de Seguridad y Calidad de los Alimentos por Bacterias Lácticas, Bacteriocinas y Probióticos (SEGABALBP), Sección Departamental de Nutrición y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.C.); (L.D.-F.); (P.E.H.); (E.M.-A.); (J.B.); (L.M.C.)
| | - Juan Borrero
- Grupo de Seguridad y Calidad de los Alimentos por Bacterias Lácticas, Bacteriocinas y Probióticos (SEGABALBP), Sección Departamental de Nutrición y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.C.); (L.D.-F.); (P.E.H.); (E.M.-A.); (J.B.); (L.M.C.)
| | - Patrícia Poeta
- Microbiology and Antibiotic Resistance Team (MicroART), Department of Veterinary Sciences, University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal;
- Associate Laboratory for Animal and Veterinary Science (AL4AnimalS), University of Trás-os-Montes and Alto Douro, 5000-801 Vila Real, Portugal
| | - Luis M. Cintas
- Grupo de Seguridad y Calidad de los Alimentos por Bacterias Lácticas, Bacteriocinas y Probióticos (SEGABALBP), Sección Departamental de Nutrición y Ciencia de los Alimentos, Facultad de Veterinaria, Universidad Complutense de Madrid, 28040 Madrid, Spain; (D.C.); (L.D.-F.); (P.E.H.); (E.M.-A.); (J.B.); (L.M.C.)
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6
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Patra M, Das D, Dey S, Koschella A, Heinze T. Structural and chemical insights into the prebiotic property of hemicellulosic polysaccharide from Santalum album L. Carbohydr Polym 2023; 321:121291. [PMID: 37739501 DOI: 10.1016/j.carbpol.2023.121291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 08/02/2023] [Accepted: 08/10/2023] [Indexed: 09/24/2023]
Abstract
Hemicellulose was extracted by alkali treatment of de-pectinated cell wall material of Santalum album L. (sandalwood) suspension culture cells. The physicochemical properties and prebiotic activities of a purified major fraction of Hemicellulose-B, termed as HB-I, were investigated. GC analysis of hydrolyzed and derivatized HB-I showed the presence of arabinose (~64 %), galactose (~16 %) and glucose (~16 %) as major monosaccharide units along with minor amount of rhamnose. Methylation and NMR studies on the purified polysaccharide revealed the presence of 6-β-d-Glcp, β-d-Galp, 3,5-α-l-Araf, α-l-Araf, 5-α-l-Araf, 2,3-α-l-Araf and, α-l-Rhap residues, from which a proposed structure of repeating units was established. The growth of probiotic Lactobacillus spp. strains L. acidophilus, L. casei, L. plantarum and L. rhamnosus was promoted while that of Escherichia coli was suppressed significantly in presence of HB-I. Our results highlight valorization of sandalwood biomass and explore the role of mixed α, β-linked heteroglycan as a potential prebiotic molecule thus indicating the possibility of development of low-cost bioprocesses for production of functional food ingredients.
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Affiliation(s)
- Moumita Patra
- Plant Biotechnology Laboratory, Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Debsankar Das
- Department of Chemistry, Prabhat Kumar College, Contai, Purba Medinipur 721404, West Bengal, India.
| | - Satyahari Dey
- Plant Biotechnology Laboratory, Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, West Bengal, India
| | - Andreas Koschella
- Friedrich Schiller University Jena, Institute for Organic Chemistry and Macromolecular Chemistry, Center of Excellence for Polysaccharide Research, Humboldtstraße 10, D-07743 Jena, Germany.
| | - Thomas Heinze
- Friedrich Schiller University Jena, Institute for Organic Chemistry and Macromolecular Chemistry, Center of Excellence for Polysaccharide Research, Humboldtstraße 10, D-07743 Jena, Germany.
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7
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Moiseenko KV, Glazunova OA, Savinova OS, Shabaev AV, Fedorova TV. Changes in Composition of Some Bioactive Molecules upon Inclusion of Lacticaseibacillus paracasei Probiotic Strains into a Standard Yogurt Starter Culture. Foods 2023; 12:4238. [PMID: 38231606 DOI: 10.3390/foods12234238] [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: 10/30/2023] [Revised: 11/17/2023] [Accepted: 11/21/2023] [Indexed: 01/19/2024] Open
Abstract
Incorporation of probiotic Lacticaseibacillus paracasei into a standard yogurt starter culture can drastically improve its health promoting properties. However, besides being an advantage in itself, the incorporation of a new probiotic strain can significantly affect the overall composition of fermented milk. In this article, the effect of incorporation of the L. paracasei probiotic strains (KF1 and MA3) into several standard yogurt starter cultures (consisting of the following strains: Streptococcus thermophilus 16t and either Lactobacillus delbrueckii Lb100 or L. delbrueckii Lb200) was investigated. Such parameters as the degree of proteolysis, antioxidant activity, ACE-inhibitory activity, content of organic acids, profile of FAs and profile of volatile organic compounds were measured, and the influence of the starter culture composition on these parameters was described. It was demonstrated that, at least in the case of the studied strains, yogurt with L. paracasei had an advantage over the standard yogurt in terms of the content of acetoin, acetic acid, butyric acid and conjugated linoleic acid. Moreover, the incorporation of L. paracasei KF1 significantly improved the hypotensive properties of the resulting yogurt. Thus, the presented study provides insight into the bioactive molecules of probiotic yogurt and may be useful for both academia and industry in the development of new dairy-based functional products.
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Affiliation(s)
- Konstantin V Moiseenko
- A. N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, Leninsky Ave. 33/2, 119071 Moscow, Russia
| | - Olga A Glazunova
- A. N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, Leninsky Ave. 33/2, 119071 Moscow, Russia
| | - Olga S Savinova
- A. N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, Leninsky Ave. 33/2, 119071 Moscow, Russia
| | - Alexander V Shabaev
- A. N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, Leninsky Ave. 33/2, 119071 Moscow, Russia
| | - Tatyana V Fedorova
- A. N. Bach Institute of Biochemistry, Research Center of Biotechnology, Russian Academy of Sciences, Leninsky Ave. 33/2, 119071 Moscow, Russia
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8
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Grabner F M, Grabner H M, Schein H, Weidenholzer E, Busche T, Rückert-Reed C, Buchebner-Jance M. Lacticaseibacillus huelsenbergensis sp. nov., isolated from grass silage and corn silage. Int J Syst Evol Microbiol 2023; 73. [PMID: 37787645 DOI: 10.1099/ijsem.0.006049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023] Open
Abstract
Two rod-shaped, facultative anaerobic, Gram-stain-positive lactic acid bacteria were isolated from corn silage and grass silage. They were characterized using a polyphasic approach and designated as HO 1656T and HO 0673. Analysis of 16S rRNA gene sequence of both strains indicated that they belong to the
Lacticaseibacillus
group. The most closely related species,
Lacticaseibacillus casei
DSM 20011T and
Lacticaseibacillus zeae
DSM 20178T, have digital DNA–DNA hybridization (dDDH) values of 63.9 and 53.4%, respectively, with the novel strains. In contrast, the dDDH value between strains HO 1656T and HO 0673 is 99.3 %, clearly showing that these two isolated strains belong to the same species. According to analysis of the housekeeping genes (dnaK, mutL and pheS), both strains form a distinct cluster within the
Lacticaseibacillus
group. Strains HO 0673 and HO 1656T could produce acid from d-arabinose, adonitol, ribose, rhamnose, dulcitol, sorbitol, turanose, l-fucose and l-arabitol, unlike their nearest phylogenetic neighbour
L. casei
DSM 20011T. The major cellular fatty acids of both strains are C16 : 0 and C18 : 1 ω9c. The G+C content of the genomic DNA of both strains is 48.0 mol%. Thus, strains HO 1656T and HO 0673 represent a novel species based on their chemotaxonomic, phenotypic and phylogenetic characteristics. The name Lacticaseibacillus huelsenbergensis sp. nov. is proposed with the type strain HO 1656T (=DSM 115425T=NCIMB 15466T).
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Affiliation(s)
- Monika Grabner F
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | - Monika Grabner H
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | - Hermine Schein
- Lactosan GmbH & Co.KG, Industriestraße West 5, 8605 Kapfenberg, Austria
| | | | - Tobias Busche
- Technology Platform Genomics, CeBiTec, Bielefeld University, Bielefeld, Germany
| | - Christian Rückert-Reed
- Omics Core Facility NGS, Medical School OWL & CeBiTec, Bielefeld University, Bielefeld, Germany
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Fratianni F, De Giulio B, d’Acierno A, Amato G, De Feo V, Coppola R, Nazzaro F. In Vitro Prebiotic Effects and Antibacterial Activity of Five Leguminous Honeys. Foods 2023; 12:3338. [PMID: 37761047 PMCID: PMC10529961 DOI: 10.3390/foods12183338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 08/22/2023] [Accepted: 09/04/2023] [Indexed: 09/29/2023] Open
Abstract
Honey is a natural remedy for various health conditions. It exhibits a prebiotic effect on the gut microbiome, including lactobacilli, essential for maintaining gut health and regulating the im-mune system. In addition, monofloral honey can show peculiar therapeutic properties. We in-vestigated some legumes honey's prebiotic properties and potential antimicrobial action against different pathogens. We assessed the prebiotic potentiality of honey by evaluating the antioxidant activity, the growth, and the in vitro adhesion of Lacticaseibacillus casei, Lactobacillus gasseri, Lacticaseibacillus paracasei subsp. paracasei, Lactiplantibacillus plantarum, and Lacticaseibacillus rhamnosus intact cells. We also tested the honey's capacity to inhibit or limit the biofilm produced by five pathogenic strains. Finally, we assessed the anti-biofilm activity of the growth medium of probiotics cultured with honey as an energy source. Most probiotics increased their growth or the in vitro adhesion ability to 84.13% and 48.67%, respectively. Overall, alfalfa honey best influenced the probiotic strains' growth and in vitro adhesion properties. Their radical-scavenging activity arrived at 83.7%. All types of honey increased the antioxidant activity of the probiotic cells, except for the less sensitive L. plantarum. Except for a few cases, we observed a bio-film-inhibitory action of all legumes' honey, with percentages up to 81.71%. Carob honey was the most effective in inhibiting the biofilm of Escherichia coli, Listeria monocytogenes, Pseudomonas aeruginosa, and Staphylococcus aureus; it retained almost entirely the ability to act against the bio-film of E. coli, L. monocytogenes, and S. aureus also when added to the bacterial growth medium instead of glucose. On the other hand, alfalfa and astragalus honey exhibited greater efficacy in acting against the biofilm of Acinetobacter baumannii. Indigo honey, whose biofilm-inhibitory action was fragile per se, was very effective when we added it to the culture broth of L. casei, whose supernatant exhibited an anti-biofilm activity against all the pathogenic strains tested. Conclusions: the five kinds of honey in different ways can improve some prebiotic properties and have an inhibitory biofilm effect when consumed.
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Affiliation(s)
- Florinda Fratianni
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (B.D.G.); (A.d.); (V.D.F.); (R.C.)
| | - Beatrice De Giulio
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (B.D.G.); (A.d.); (V.D.F.); (R.C.)
| | - Antonio d’Acierno
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (B.D.G.); (A.d.); (V.D.F.); (R.C.)
| | - Giuseppe Amato
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (B.D.G.); (A.d.); (V.D.F.); (R.C.)
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Vincenzo De Feo
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (B.D.G.); (A.d.); (V.D.F.); (R.C.)
- Department of Pharmacy, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy
| | - Raffaele Coppola
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (B.D.G.); (A.d.); (V.D.F.); (R.C.)
- Department of Agriculture, Environmental and Food Sciences, University of Molise, Via de Sanctis, 86100 Campobasso, Italy
| | - Filomena Nazzaro
- Institute of Food Science, CNR-ISA, Via Roma 64, 83100 Avellino, Italy; (F.F.); (B.D.G.); (A.d.); (V.D.F.); (R.C.)
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Kim E, Yang SM, Choi CH, Shin MK, Kim HY. Droplet digital PCR method for the absolute quantitative detection and monitoring of Lacticaseibacillus casei. Food Microbiol 2023; 113:104265. [PMID: 37098421 DOI: 10.1016/j.fm.2023.104265] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 03/09/2023] [Accepted: 03/09/2023] [Indexed: 03/12/2023]
Abstract
Droplet digital polymerase chain reaction (ddPCR) is an emerging molecular detection assay that provides an absolute quantification of targets. Despite its emerging applications in the detection of food microorganisms, there are limited reports of its use for the monitoring of microorganisms utilized as starters in the dairy industry. This study investigated the applicability of ddPCR as a detection platform for Lacticaseibacillus casei, a probiotic found in fermented foods and exerts beneficial effects on human health. In addition, this study compared the performance of ddPCR with that of real-time PCR. The ddPCR targeting the haloacid dehalogenase-like hydrolase (LBCZ_1793) exhibited high specificity against 102 nontarget bacteria, including Lacticaseibacillus species that is very closely related to L. casei. The ddPCR exhibited high linearity and efficiency within the quantitation range (105-100 CFU/ml), with the limit of detection being 100 CFU/ml. The ddPCR also demonstrated a higher sensitivity than real-time PCR in detecting low bacterial concentration in spiked milk samples. Furthermore, it provided an accurate absolute quantification of the concentration of L. casei, without the need for standard calibration curves. This study demonstrated that ddPCR is a useful method for monitoring starter cultures in dairy fermentations and detecting L. casei in foods.
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Won SM, Lee NY, Oh KK, Gupta H, Sharma SP, Kim KH, Kim BK, Joung HC, Jeong JJ, Ganesan R, Han SH, Yoon SJ, Kim DJ, Suk KT. Gut Lactobacillus and Probiotics Lactobacillus lactis/rhamnosis Ameliorate Liver Fibrosis in Prevention and Treatment. J Microbiol 2023; 61:245-257. [PMID: 36745335 DOI: 10.1007/s12275-023-00014-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 11/18/2022] [Accepted: 12/21/2022] [Indexed: 02/07/2023]
Abstract
The progression and exacerbation of liver fibrosis are closely related to the gut microbiome. It is hypothesized that some probiotics may slow the progression of liver fibrosis. In human stool analysis [healthy group (n = 44) and cirrhosis group (n = 18)], difference in Lactobacillus genus between healthy group and cirrhosis group was observed. Based on human data, preventive and therapeutic effect of probiotics Lactobacillus lactis and L. rhamnosus was evaluated by using four mice fibrosis models. L. lactis and L. rhamnosus were supplied to 3,5-diethoxycarbonyl-1,4-dihydrocollidine or carbon tetrachloride-induced liver fibrosis C57BL/6 mouse model. Serum biochemical measurements, tissue staining, and mRNA expression in the liver were evaluated. The microbiome was analyzed in mouse cecal contents. In the mouse model, the effects of Lactobacillus in preventing and treating liver fibrosis were different for each microbe species. In case of L. lactis, all models showed preventive and therapeutic effects against liver fibrosis. In microbiome analysis in mouse models administered Lactobacillus, migration and changes in the ratio and composition of the gut microbial community were confirmed. L. lactis and L. rhamnosus showed preventive and therapeutic effects on the progression of liver fibrosis, suggesting that Lactobacillus intake may be a useful strategy for prevention and treatment.
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Affiliation(s)
- Sung Min Won
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Na Young Lee
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Ki-Kwang Oh
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Haripriya Gupta
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Satya Priya Sharma
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Kyung Hwan Kim
- Chong Kun Dang Bio Research Institute, Ansan, Republic of Korea
| | - Byoung Kook Kim
- Chong Kun Dang Bio Research Institute, Ansan, Republic of Korea
| | - Hyun Chae Joung
- Chong Kun Dang Bio Research Institute, Ansan, Republic of Korea
| | - Jin Ju Jeong
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Raja Ganesan
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Sang Hak Han
- Department of Pathology, Hallym University College of Medicine, Chuncheon, 24252, Republic of Korea
| | - Sang Jun Yoon
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Dong Joon Kim
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea
| | - Ki Tae Suk
- Institute for Liver and Digestive Diseases, Hallym University, Chuncheon, 24252, Republic of Korea.
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Biochemical and Genomic Characterization of Two New Strains of Lacticaseibacillus paracasei Isolated from the Traditional Corn-Based Beverage of South Africa, Mahewu, and Their Comparison with Strains Isolated from Kefir Grains. Foods 2023; 12:foods12010223. [PMID: 36613437 PMCID: PMC9818903 DOI: 10.3390/foods12010223] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/05/2023] Open
Abstract
Lacticaseibacillus paracasei (formerly Lactobacillus paracasei) is a nomadic lactic acid bacterium (LAB) that inhabits a wide variety of ecological niches, from fermented foodstuffs to host-associated microenvironments. Many of the isolated L. paracasei strains have been used as single-strain probiotics or as part of a symbiotic consortium within formulations. The present study contributes to the exploration of different strains of L. paracasei derived from non-conventional isolation sources-the South African traditional fermented drink mahewu (strains MA2 and MA3) and kefir grains (strains KF1 and ABK). The performed microbiological, biochemical and genomic comparative analyses of the studied strains demonstrated correlation between properties of the strains and their isolation source, which suggests the presence of at least partial strain adaptation to the isolation environments. Additionally, for the studied strains, antagonistic activities against common pathogens and against each other were observed, and the ability to release bioactive peptides with antioxidant and angiotensin I-converting enzyme inhibitory (ACE-I) properties during milk fermentation was investigated. The obtained results may be useful for a deeper understanding of the nomadic lifestyle of L. paracasei and for the development of new starter cultures and probiotic preparations based on this LAB in the future.
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Fatma II, Nuraida L, Faridah DN. Potensi Probiotik Bakteri Asam Laktat Asal Madu dari Tiga Jenis Lebah yang Berbeda. JURNAL TEKNOLOGI DAN INDUSTRI PANGAN 2022. [DOI: 10.6066/jtip.2022.33.2.189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Certain strains of Lactic acid bacteria (LAB) especially from the genus of Lactobacillus and Bifidobacteria have been recognized to have health beneficial effect as probiotics. Honey has been known to have health beneficial effects and contains lactic acid bacteria. However, information pertaining the characteristics of LAB from honey is still limited. The present research aimed to isolate LAB from different types of honey and to evaluate their potency as probiotic. The LAB were enumerated and isolated from honey produced by three different honeybees: Apis cerana, Heterotrigona itama, and Trigona laeviceps. The results showed the count of LAB in three different honey ranged from 5.0x101 to 2.3x107 CFU/mL and affected by different time of sampling. The highest of average LAB count was found in honey of Heterotrigona itama. There were 48 Gram positive catalase-negative bacterial isolates obtained from the three different honey types. Twelve isolates were selected based on their survival in bile salt. The twelve selected isolates were capable of growing in MRSB pH 2.5, and MRSB containing 0.3% bile salt. They also exhibited strong antibacterial activity against pathogenic bacteria. Identification based on 16S rRNA revealed that of the twelve isolates, nine were identified as Lactiplantibacillus plantarum and three others as Pediococcus acidilactici. The twelve isolates showed high survival at low pH dan bile salt and exhibited antimicrobial activity against pathogen, hence they are considered as probiotic candidates.
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14
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Laref N, Belkheir K. Application of 16S rRNA virtual RFLP for the discrimination of some closely taxonomic-related lactobacilli species. J Genet Eng Biotechnol 2022; 20:167. [PMID: 36525129 PMCID: PMC9756238 DOI: 10.1186/s43141-022-00448-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 12/04/2022] [Indexed: 12/23/2022]
Abstract
BACKGROUND Several species in Lactobacillaceae family were recognized as potential probiotic bacteria. In this group of lactic acid bacteria, species are taxonomically closed and usually share similar 16S rRNA gene, thus, instead of so their identification and discrimination are too difficult. METHOD In the present study, virtual restriction fragment length polymorphism (RFLP) is instead of was used as a tool to discriminate between the closely related species Lactiplantibacillus plantarum (L plantarum), Lactiplantibacillus paraplantarum (L paraplantarum), and Lactiplantibacillus pentosus (L pentosus); Latilactobacillus sakei (L sakei), Latilactobacillus curvatus(L curvatus), and Latilactobacillus graminis (L graminis); Lacticaseibacillus casei (L casei), Lacticaseibacillus paracasei (L paracasei), Lacticaseibacillus zeae, and Lacticaseibacillus rhamnosus; Lactobacillus gasseri (L gasseri) and Lactobacillus johnsonii (L johnsonii). In silico comparative analysis of 16S rRNA sequences digested by 280 restriction enzymes was performed in order to search the key enzymes which gives different profiles. RESULTS Results revealed that L casei, L paracasei, L zeae, and Lb rhamnosus could be separated from each other on the basis of AlwI, BpuEI, BsgI, BsrDI, BstYI, EarI, MluCI, and NsPI RFLP. Results showed also that different RFLP patterns were obtained from L sakei, L graminis and L curvatus by using both AflI and NspI endonucleases (in separated restriction) and L plantarum, L paraplantarum, and L pentosus were distinguished each one from the other by MucI, NspI, and TspDTI PCR-RFLP. Lb gasseri and L johnsonii were also separated on the basis of Mse I, Taq I, and Dra I RFLP. CONCLUSION In this study, we proved that too closely related species could be separated in virtual analysis on basis of their 16S rRNA RFLP patterns using key restriction enzymes method.
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Affiliation(s)
- Nora Laref
- University Ahmed Zabana of Relizane, Relizane, Algeria
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15
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Liang JR, Deng H, Hu CY, Zhao PT, Meng YH. Vitality, fermentation, aroma profile, and digestive tolerance of the newly selected Lactiplantibacillus plantarum and Lacticaseibacillus paracasei in fermented apple juice. Front Nutr 2022; 9:1045347. [PMID: 36562036 PMCID: PMC9764440 DOI: 10.3389/fnut.2022.1045347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
Background To enrich the probiotic lactic acid bacteria (LAB) strains and expand the commercialization of new fermented juice products, we have identified two LAB strains with excellent potential in fermenting apple juice from pickles. Methods The two strains were morphologically, physiologically, and genetically characterized. The strains' fermentation performance and alterations in volatile aroma components of apple juice and ability to survive in a simulated gastrointestinal environment were evaluated. Results Two strains were identified as Lacticaseibacillus paracasei (WFC 414) and Lactiplantibacillus plantarum (WFC 502). The growth of WFC 414 and WFC 502 in apple juice for 48 h reached 8.81 and 9.33 log CFU/mL, respectively. Furthermore, 92% and 95% survival rates were achieved in 2 h simulated gastric juice, and 80.7 and 83.6% survival rates in 4 h simulated intestinal juice. During the fermentation, WFC 414 and WFC 502 reduced the soluble sugars and total polyphenols in apple juice, and consumed malic acid to produce large amounts of lactic acid (3.48 and 5.94 mg/mL). In addition, the esters and aldehydes were reduced, and the production of alcohols, acids and ketones was elevated in the apple juice fermented by both strains. Conclusion These results show that WFC 414 and WFC 502 have great potential applications in the fermented fruit juice industry.
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Affiliation(s)
- Jia Rui Liang
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research & Development Center of Apple Processing Technology, College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi’an, China
| | - Hong Deng
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research & Development Center of Apple Processing Technology, College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi’an, China,*Correspondence: Hong Deng,
| | - Ching Yuan Hu
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research & Development Center of Apple Processing Technology, College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi’an, China,Department of Human Nutrition, Food and Animal Sciences, College of Tropical Agriculture and Human Resources, University of Hawai’i at Mānoa, Honolulu, HI, United States
| | - Peng Tao Zhao
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research & Development Center of Apple Processing Technology, College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi’an, China
| | - Yong Hong Meng
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research & Development Center of Apple Processing Technology, College of Food Engineering and Nutrition Science, Shaanxi Normal University, Xi’an, China,Yong Hong Meng,
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16
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Characterization of probiotic properties and development of banana powder enriched with freeze-dried Lacticaseibacillus paracasei probiotics. Heliyon 2022; 8:e11063. [PMID: 36276732 PMCID: PMC9578979 DOI: 10.1016/j.heliyon.2022.e11063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 04/11/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022] Open
Abstract
Lacticaseibacillus paracasei is one of the probiotic bacteria widely identified from fermented foods. The application of L. paracasei is commonly used in dairy and non-dairy products. To investigate the probiotic properties of L. paracasei cells including their acid, pepsin, pancreatin, and bile salt tolerances; adhesion ability; antipathogen activity; and antibiotic susceptibility, L. paracasei cells were incorporated into skim milk and lyophilized by freeze drying. Freeze-dried probiotic cells were add to green banana powder and low moisture additive food matrices and a storage analysis of the product was performed. The result showed that L. paracasei cells possessed potentially beneficial probiotic properties to survive stress in the gastrointestinal tract (GIT) and functional abilities as an anti-enteropathogenic agent; they were also safe to use and displayed antibiotic properties. Furthermore, the probiotic freeze-drying technique preserved high probiotic cell survivability (1011 CFU/g). In term of prolonged storage (60 days), the powder product was stable and maintained probiotic survival (107 CFU/g) while excluding non-probiotic growth. In conclusion, L. paracasei displayed probiotic properties in the GIT and was judged to be a highly acceptable product as a probiotics–banana rehydrated beverage.
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17
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Ranjan A, Arora J, Chauhan A, Basniwal RK, Kumari A, Rajput VD, Prazdnova EV, Ghosh A, Mukerjee N, Mandzhieva SS, Sushkova S, Minkina T, Jindal T. Advances in characterization of probiotics and challenges in industrial application. Biotechnol Genet Eng Rev 2022:1-44. [PMID: 36200338 DOI: 10.1080/02648725.2022.2122287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 08/05/2022] [Indexed: 11/02/2022]
Abstract
An unbalanced diet and poor lifestyle are common reasons for numerous health complications in humans. Probiotics are known to provide substantial benefits to human health by producing several bioactive compounds, vitamins, short-chain fatty acids and short peptides. Diets that contain probiotics are limited to curd, yoghurt, kefir, kimchi, etc. However, exploring the identification of more potential probiotics and enhancing their commercial application to improve the nutritional quality would be a significant step to utilizing the maximum benefits. The complex evolution patterns among the probiotics are the hurdles in their characterization and adequate application in the industries and dairy products. This article has mainly discussed the molecular methods of characterization that are based on the analysis of ribosomal RNA, whole genome, and protein markers and profiles. It also has critically emphasized the emerging challenges in industrial applications of probiotics.
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Affiliation(s)
- Anuj Ranjan
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Jayati Arora
- Amity Institute of Environmental Sciences, Amity University, Noida, India
| | - Abhishek Chauhan
- Amity Institute of Environmental Toxicology Safety and Management, Amity University, Noida, India
| | - Rupesh Kumar Basniwal
- Amity Institute of Advanced Research and Studies (M&D), Amity University, Noida, India
| | - Arpna Kumari
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Vishnu D Rajput
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Evgeniya V Prazdnova
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Arabinda Ghosh
- Microbiology Division, Department of Botany, Gauhati University, Guwahati, India
| | - Nobendu Mukerjee
- Department of Microbiology, Ramakrishna Mission Vivekananda Centenary College, Kolkata, India
- Department of Health Sciences, Novel Global Community Educational Foundation, New South Wales, Australia
| | - Saglara S Mandzhieva
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Svetlana Sushkova
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Tatiana Minkina
- Academy of Biology and Biotechnology, Southern Federal University, Rostov-on-Don, Russia
| | - Tanu Jindal
- Amity Institute of Environmental Toxicology Safety and Management, Amity University, Noida, India
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Kim E, Yang SM, Cho EJ, Kim HY. Evaluation of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry for the discrimination of Lacticaseibacillus species. Food Microbiol 2022; 107:104094. [DOI: 10.1016/j.fm.2022.104094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 07/09/2022] [Accepted: 07/12/2022] [Indexed: 11/16/2022]
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Zhao L, Zhang D, Liu Y, Zhang YN, Meng DQ, Xu Q, Zhong J, Jiang QY, Zhao Y, Wang SJ. Quantitative PCR Assays for the Strain-Specific Identification and Enumeration of Probiotic Strain Lacticaseibacillus rhamnosus X253. Foods 2022; 11:foods11152282. [PMID: 35954048 PMCID: PMC9367767 DOI: 10.3390/foods11152282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 11/20/2022] Open
Abstract
Probiotics are universally recognized for their health benefits, despite the fact that their effects depend on the strain. Identification and enumeration of probiotic strains are required prior to evaluating their effectiveness. Lacticaseibacillus rhamnosus X253 is a potential probiotic strain with antioxidant capacity. Comparative genomics and single nucleotide polymorphisms (SNPs) were used to identify a strain-specific locus within the holA gene for strain X253 that was distinct in 30 different L. rhamnosus strains. Using quantitative PCR, the primers and probe designed for the locus were able to distinguish L. rhamnosus X253 from the other 20 probiotic strains. The chosen locus remained stable over 19 generations. The sensitivity of the assay was 0.2 pg genomic DNA of L. rhamnosus X253, or 103 cfu/mL bacteria of this strain. In terms of repeatability and reproducibility, relative standard deviations (RSD) were less than 1% and 3%, respectively. Additionally, this assay achieved accurate enumerations of L. rhamnosus X253 in spiked milk and complex powder samples. The strain-specific assay could be used for quality control and compliance assessment of dairy products.
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Affiliation(s)
- Lei Zhao
- Key Laboratory of Milk and Dairy Products Detection and Monitoring Technology for State Market Regulation, Shanghai Institute of Quality Inspection and Technical Research, Shanghai 200233, China; (L.Z.); (Y.-N.Z.); (Q.X.)
- Department of Microbiology and Microbial Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.Z.); (Q.-Y.J.)
| | - Dong Zhang
- Junlebao Dairy Group, Shijiazhuang 050221, China;
| | - Yang Liu
- Key Laboratory of Milk and Dairy Products Detection and Monitoring Technology for State Market Regulation, Shanghai Institute of Quality Inspection and Technical Research, Shanghai 200233, China; (L.Z.); (Y.-N.Z.); (Q.X.)
- Correspondence: (Y.L.); (S.-J.W.); Tel.: +86-021-54263408 (Y.L.); +86-0311-86266225 (S.-J.W.)
| | - Yi-Nan Zhang
- Key Laboratory of Milk and Dairy Products Detection and Monitoring Technology for State Market Regulation, Shanghai Institute of Quality Inspection and Technical Research, Shanghai 200233, China; (L.Z.); (Y.-N.Z.); (Q.X.)
| | - Dong-Qing Meng
- College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; (D.-Q.M.); (Y.Z.)
| | - Qiong Xu
- Key Laboratory of Milk and Dairy Products Detection and Monitoring Technology for State Market Regulation, Shanghai Institute of Quality Inspection and Technical Research, Shanghai 200233, China; (L.Z.); (Y.-N.Z.); (Q.X.)
| | - Jiang Zhong
- Department of Microbiology and Microbial Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.Z.); (Q.-Y.J.)
| | - Qiu-Yue Jiang
- Department of Microbiology and Microbial Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China; (J.Z.); (Q.-Y.J.)
| | - Yu Zhao
- College of Life Sciences, Shanghai Normal University, Shanghai 200234, China; (D.-Q.M.); (Y.Z.)
| | - Shi-Jie Wang
- Junlebao Dairy Group, Shijiazhuang 050221, China;
- Correspondence: (Y.L.); (S.-J.W.); Tel.: +86-021-54263408 (Y.L.); +86-0311-86266225 (S.-J.W.)
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Lee JY, Hwang HW, Jin HS, Lee JE, Kang NJ, Lee DW. A Genomics-Based Semirational Approach for Expanding the Postbiotic Potential of Collagen Peptides Using Lactobacillaceae. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:8365-8376. [PMID: 35758868 DOI: 10.1021/acs.jafc.2c01251] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Food-derived bioactive peptides (BPs) have received considerable attention as postbiotics for human gut health. Here we used a genomics-based semirational approach to expand the postbiotic potential of collagen peptides (CPs) produced from probiotic fermentation. In silico digestion revealed distinct BPs embedded in fish collagen in a protease-dependent manner. Anaerobic digestion of collagen by representative Lactobacillaceae species revealed differential substrate utilization and collagen degradation patterns. Nanoliquid chromatography-mass spectrometry analysis of CPs showed that each species exhibited different cleavage patterns and unique peptide profiles. Remarkably, the 1-10 kDa CPs produced by Lacticaseibacillus paracasei showed agonistic activities toward G protein-coupled receptor 35 (GPR35). These CPs could repair intestinal epithelium through the GPR35-mediated extracellular signal-regulated protein kinase (ERK) 1/2 signaling pathway, suggesting that probiotic-aided collagen hydrolysates can serve as postbiotics for host-microbe interactions. Therefore, this study provides an effective strategy for the rapid screening of CPs for gut health in the gastrointestinal tract.
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Affiliation(s)
- Ji-Young Lee
- Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, South Korea
| | - Hye Won Hwang
- Department of Bioindustrial Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, South Korea
| | - Hyeon-Su Jin
- Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, South Korea
| | - Jae-Eun Lee
- Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, South Korea
| | - Nam Joo Kang
- School of Food Science and Biotechnology, Kyungpook National University, Daehak-ro 80, Buk-gu, Daegu 41566, South Korea
| | - Dong-Woo Lee
- Department of Biotechnology, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, South Korea
- Department of Bioindustrial Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, South Korea
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21
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Obafemi Y, Oranusi S, Oluseyi AK, Akinduti P. Genotyping of Probiotic Lactobacilli in Nigerian Fermented Condiments for Improved Food Safety. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.8338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND: Plant-based naturally fermented condiments usually result in poor quality products with various bacteria and fungi contaminants. Previous reports suggested the use of starter cultures from previously fermented condiments in fermentation processes to ensure health-promoting benefits, improved quality, shelf life, and organoleptic properties for the achievement of healthy nutrition, safe, and quality food.
AIM: This study aimed to genotype potential lactobacilli from locally fermented condiments for improved food safety.
METHODS: The lactobacilli colonies isolated from fermented condiments purchased from food markets in Southwest Nigeria were profiled for probiotic activities, hemolytic activities, antibiotics susceptibility, and inhibitory activities against food pathogens. Interesting probiotic lactobacilli were identified using 16S rRNA gene sequencing and evaluated for phylogenetic relatedness with other globally reported probiotic lactobacilli.
RESULTS: Lactobacillus species which expressed significant probiotics, γ-hemolysis, anti-spoilage, and anti-listerial activities (P < 0.05) with tolerable safety profiles were identified as Lactiplantibacillus plajomi YD001 (MW280136), Lactiplantibacillus plantarum YD002 (MW280139), L. plantarum YD003 (MW280137), and Lacticaseibacillus paracasei YD004 (MW280138) possessed 50.75, 50.61, 50.75, and 52.54 mol% DNA G+C contents, respectively. The species clustered into different phylogroups with high clonal relatedness with other potential lactobacilli meta-data (≥96.80%) obtained from the public repository.
CONCLUSION: Obtained genotyped Lactobacillus species are potential starter cultures for improved fermentation processes, control of food pathogens, and spoilage organisms.
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22
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Kim E, Kim D, Yang SM, Kim HY. Validation of probiotic species or subspecies identity in commercial probiotic products using high-resolution PCR method based on large-scale genomic analysis. Food Res Int 2022; 154:111011. [DOI: 10.1016/j.foodres.2022.111011] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 02/10/2022] [Accepted: 02/12/2022] [Indexed: 12/18/2022]
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Diversity of a Lactic Acid Bacterial Community during Fermentation of Gajami-Sikhae, a Traditional Korean Fermented Fish, as Determined by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry. Foods 2022; 11:foods11070909. [PMID: 35406996 PMCID: PMC8997922 DOI: 10.3390/foods11070909] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/18/2022] [Accepted: 03/21/2022] [Indexed: 12/04/2022] Open
Abstract
Gajami-sikhae is a traditional Korean fermented fish food made by naturally fermenting flatfish (Glyptocephalus stelleri) with other ingredients. This study was the first to investigate the diversity and dynamics of lactic acid bacteria in gajami-sikhae fermented at different temperatures using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). A total of 4824 isolates were isolated from the fermented gajami-sikhae. These findings indicated that Latilactobacillus, Lactiplantibacillus, Levilactobacillus, Weissella, and Leuconostoc were the dominant genera during fermentation, while the dominant species were Latilactobacillus sakei, Lactiplantibacillus plantarum, Levilactobacillus brevis, Weissella koreensis, and Leuconostoc mesenteroides. At all temperatures, L. sakei was dominant at the early stage of gajami-sikhae fermentation, and it maintained dominance until the later stage of fermentation at low temperatures (5 °C and 10 °C). However, L. plantarum and L. brevis replaced it at higher temperatures (15 °C and 20 °C). The relative abundance of L. plantarum and L. brevis reached 100% at the later fermentation stage at 20 °C. These results suggest that the optimal fermentation temperatures for gajami-sikhae are low rather than high temperatures. This study could allow for the selection of an adjunct culture to control gajami-sikhae fermentation.
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24
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Lugli GA, Longhi G, Alessandri G, Mancabelli L, Tarracchini C, Fontana F, Turroni F, Milani C, Di Pierro F, van Sinderen D, Ventura M. The Probiotic Identity Card: A Novel “Probiogenomics” Approach to Investigate Probiotic Supplements. Front Microbiol 2022; 12:790881. [PMID: 35126330 PMCID: PMC8814603 DOI: 10.3389/fmicb.2021.790881] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 12/14/2021] [Indexed: 12/19/2022] Open
Abstract
Probiotic bacteria are widely administered as dietary supplements and incorporated as active ingredients in a variety of functional foods due to their purported health-promoting features. Currently available probiotic products may have issues with regards to their formulation, such as insufficient levels of viable probiotic bacteria, complete lack of probiotic strains that are stated to be present in the product, and the presence of microbial contaminants. To avoid the distribution of such unsuitable or misleading products, we propose here a novel approach named Probiotic Identity Card (PIC), involving a combination of shotgun metagenomic sequencing and bacterial cell enumeration by flow cytometry. PIC was tested on 12 commercial probiotic supplements revealing several inconsistencies in the formulation of five such products based on their stated microbial composition and viability.
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Affiliation(s)
- Gabriele Andrea Lugli
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
| | - Giulia Longhi
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
- GenProbio Srl, Parma, Italy
| | - Giulia Alessandri
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
| | - Leonardo Mancabelli
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
| | - Chiara Tarracchini
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
| | - Federico Fontana
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
- GenProbio Srl, Parma, Italy
| | - Francesca Turroni
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
- Microbiome Research Hub, University of Parma, Parma, Italy
| | - Christian Milani
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
- Microbiome Research Hub, University of Parma, Parma, Italy
| | - Francesco Di Pierro
- Velleja Research, Milan, Italy
- Digestive Endoscopy Unit and Gastroenterology, Fondazione Poliambulanza, Brescia, Italy
| | - Douwe van Sinderen
- APC Microbiome Institute and School of Microbiology, Bioscience Institute, National University of Ireland, Cork, Ireland
| | - Marco Ventura
- Laboratory of Probiogenomics, Department of Chemistry, Life Sciences, and Environmental Sustainability, University of Parma, Parma, Italy
- Microbiome Research Hub, University of Parma, Parma, Italy
- *Correspondence: Marco Ventura,
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Devarajan A, Mudgil P, Aldhaheri F, Hamed F, Dhital S, Maqsood S. Camel milk-derived probiotic strains encapsulated in camel casein and gelatin complex microcapsules: Stability against thermal challenge and simulated gastrointestinal digestion conditions. J Dairy Sci 2022; 105:1862-1877. [PMID: 34998543 DOI: 10.3168/jds.2021-20745] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Accepted: 11/09/2021] [Indexed: 12/17/2022]
Abstract
Probiotics have received increased attention due to their nutritional and health-promoting benefits. However, their viability is often impeded during food processing as well as during their gastrointestinal transit before reaching the colon. In this study, probiotic strains Lactobacillus rhamnosus MF00960, Pediococcus pentosaceus MF000967, and Lactobacillus paracasei DSM20258 were encapsulated within sodium alginate, camel casein (CC), camel skin gelatin (CSG) and CC:CSG (1:1 wt/wt) wall materials. All 3 strains in encapsulated form showed an enhanced survival rate upon simulated gastrointestinal digestion compared with free cells. Among the encapsulating matrices, probiotics embedded in CC showed higher viability and is attributed to less porous structure of CC that provided more protection to entrapped probiotics cells. Similarly, thermal tolerance at 50°C and 70°C of all 3 probiotic strains were significantly higher upon encapsulation in CC and CC:CSG. Scanning electron microscope micrographs showed probiotic strains embedded in the dense protein matrix of CC and CSG. Fourier-transform infrared spectroscopy showed that CC- and CSG-encapsulated probiotic strains exhibited the amide bands with varying intensity with no significant change in the structural conformation. Probiotic strains encapsulated in CC and CC:CSG showed higher retention of inhibitory properties against α-glucosidase, α-amylase, dipeptidyl peptidase-IV, pancreatic lipase, and cholesteryl esterase compared with free cells upon exposure to simulated gastrointestinal digestion conditions. Therefore, CC alone or in combination with CSG as wall materials provided effective protection to cells, retained their bioactive properties, which was comparable to sodium alginate as wall materials. Thus, CC and CC:CSG can be an efficient wall material for encapsulation of probiotics for food applications.
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Affiliation(s)
- Aarthi Devarajan
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, 15551, United Arab Emirates
| | - Priti Mudgil
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, 15551, United Arab Emirates
| | - Fatima Aldhaheri
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, 15551, United Arab Emirates
| | - Fathala Hamed
- Department of Physics, College of Science, United Arab Emirates University, Al Ain, 15551, United Arab Emirates
| | - Sushil Dhital
- Department of Chemical Engineering, Monash University, Clayton, VIC 3800, Australia
| | - Sajid Maqsood
- Department of Food Science, College of Agriculture and Veterinary Medicine, United Arab Emirates University, Al Ain, 15551, United Arab Emirates.
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26
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Isolation and probiotic potential of lactic acid bacteria from swine feces for feed additive composition. Arch Microbiol 2021; 204:61. [PMID: 34940898 PMCID: PMC8702511 DOI: 10.1007/s00203-021-02700-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 11/08/2021] [Accepted: 11/09/2021] [Indexed: 12/05/2022]
Abstract
Animal microbiota is becoming an object of interest as a source of beneficial bacteria for commercial use. Moreover, the escalating problem of bacterial resistance to antibiotics is threatening animals and humans; therefore, in the last decade intensive search for alternative antimicrobials has been observed. In this study, lactic acid bacteria (LAB) were isolated from suckling and weaned pigs feces (376) and characterized to determine their functional properties and usability as pigs additives. Selection of the most promising LAB was made after each stage of research. Isolates were tested for their antimicrobial activity (376) and susceptibility to antibiotics (71). Selected LAB isolates (41) were tested for the production of organic acids, enzymatic activity, cell surface hydrophobicity and survival in gastrointestinal tract. Isolates selected for feed additive (5) were identified by MALDI-TOF mass spectrometry and partial sequence analysis of 16S rRNA gene, represented by Lentilactobacillus, Lacticaseibacillus (both previously classified as Lactobacillus) and Pediococcus genus. Feed additive prototype demonstrated high viability after lyophilization and during storage at 4 °C and − 20 °C for 30 days. Finally, feed additive was tested for survival in simulated alimentary tract of pigs, showing viability at the sufficient level to colonize the host. Studies are focused on obtaining beneficial strains of LAB with probiotic properties for pigs feed additive.
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27
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Liu P, Yang S, Yang S. KTU: K‐mer Taxonomic Units improve the biological relevance of amplicon sequence variant microbiota data. Methods Ecol Evol 2021. [DOI: 10.1111/2041-210x.13758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Po‐Yu Liu
- Department of Internal Medicine National Taiwan University College of Medicine Taipei Taiwan
- Department of Pathobiology and Population Sciences Royal Veterinary CollegeUniversity of London Hatfield UK
| | - Shan‐Hua Yang
- Institute of Fisheries Science National Taiwan University Taipei Taiwan
| | - Sung‐Yin Yang
- Shimoda Marine Research Center University of Tsukuba Shimoda Japan
- National Museum of Marine Biology and Aquarium Pingtung Taiwan
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28
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Park C, Kim SB, Choi SH, Kim S. Comparison of 16S rRNA Gene Based Microbial Profiling Using Five Next-Generation Sequencers and Various Primers. Front Microbiol 2021; 12:715500. [PMID: 34721319 PMCID: PMC8552068 DOI: 10.3389/fmicb.2021.715500] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 09/16/2021] [Indexed: 01/04/2023] Open
Abstract
Microbial community analysis based on the 16S rRNA-gene is used to investigate both beneficial and harmful microorganisms in various fields and environments. Recently, the next-generation sequencing (NGS) technology has enabled rapid and accurate microbial community analysis. Despite these advantages of NGS based metagenomics study, sample transport, storage conditions, amplification, library preparation kits, sequencing, and bioinformatics procedures can bias microbial community analysis results. In this study, eight mock communities were pooled from genomic DNA of Lactobacillus acidophilus KCTC 3164T, Limosilactobacillus fermentum KCTC 3112T, Lactobacillus gasseri KCTC 3163T, Lacticaseibacillus paracasei subsp. paracasei KCTC 3510T, Limosilactobacillus reuteri KCTC 3594T, Lactococcus lactis subsp. lactis KCTC 3769T, Bifidobacterium animalis subsp. lactis KCTC 5854T, and Bifidobacterium breve KCTC 3220T. The genomic DNAs were quantified by droplet digital PCR (ddPCR) and were mixed as mock communities. The mock communities were amplified with various 16S rRNA gene universal primer pairs and sequenced by MiSeq, IonTorrent, MGIseq-2000, Sequel II, and MinION NGS platforms. In a comparison of primer-dependent bias, the microbial profiles of V1-V2 and V3 regions were similar to the original ratio of the mock communities, while the microbial profiles of the V1-V3 region were relatively biased. In a comparison of platform-dependent bias, the sequence read from short-read platforms (MiSeq, IonTorrent, and MGIseq-2000) showed lower bias than that of long-read platforms (Sequel II and MinION). Meanwhile, the sequences read from Sequel II and MinION platforms were relatively biased in some mock communities. In the data of all NGS platforms and regions, L. acidophilus was greatly underrepresented while Lactococcus lactis subsp. lactis was generally overrepresented. In all samples of this study, the bias index (BI) was calculated and PCA was performed for comparison. The samples with biased relative abundance showed high BI values and were separated in the PCA results. In particular, analysis of regions rich in AT and GC poses problems for genome assembly, which can lead to sequencing bias. According to this comparative analysis, the development of reference material (RM) material has been proposed to calibrate the bias in microbiome analysis.
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Affiliation(s)
- Changwoo Park
- Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea.,Group for Biometrology, Korea Research Institute of Standards and Science, Daejeon, South Korea.,Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon, South Korea
| | - Seung Bum Kim
- Department of Biological Sciences, College of Bioscience and Biotechnology, Chungnam National University, Daejeon, South Korea
| | - Sang Ho Choi
- Department of Agricultural Biotechnology, Seoul National University, Seoul, South Korea.,Center for Food and Bioconvergence, Seoul National University, Seoul, South Korea
| | - Seil Kim
- Group for Biometrology, Korea Research Institute of Standards and Science, Daejeon, South Korea.,Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon, South Korea.,Department of Bio-Analysis Science, University of Science and Technology, Daejeon, South Korea
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29
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Dutra-Silva L, Matteoli FP, Arisi ACM. Distribution of Genes Related to Probiotic Effects Across Lacticaseibacillus rhamnosus Revealed by Population Structure. Probiotics Antimicrob Proteins 2021; 15:548-557. [PMID: 34699013 DOI: 10.1007/s12602-021-09868-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2021] [Indexed: 11/24/2022]
Abstract
The Gram-positive Lacticaseibacillus rhamnosus has been broadly reported as capable of exerting beneficial health effects. Bacterial genomic diversity may promote niche specialization, thus creating subpatterns within populations. As L. rhamnosus advantageous effects have been widely reported at strain level and few is known regarding the distribution of beneficial genes among L. rhamnosus strains, we investigated all publicly available genomes of Lactobacillus and Lacticaseibacillus genera to study the pangenome and general population structure of L. rhamnosus. Core genome multilocus sequence typing detected eight L. rhamnosus phylogroups (PG1 to PG8). L. rhamnosus harbors an open pangenome; PG1, PG3, PG4, and PG5 exhibited highly conserved gene distribution patterns. Genes significantly associated to the PG1, which comprises L. rhamnosus GG, are mainly phage-related. The adhesion operon spaCBA-srtC1 was found in 44 (24.7%) genomes; however, considering only the PG1, the prevalence was of 65%. In PG2 the spaCBA-srtC1 prevalence was of 43%. Nevertheless, both human and milk-derived strains harbored this operon. Further, two main types of bacteriocin clusters were found (Bact1 and Bact2). Bact1 predictions indicate the presence of garQ, encoding the class II bacteriocin garvieacin Q, that is mainly present in the closely related PG8A and a PG2 subcluster. PG2 harbors two distinct subclusters, harboring either spaCBA-srtC1 or Bact1. Our findings provide novel insights on the distribution of biotechnological relevant genes across L. rhamnosus population, uncovering intra-species patterns that may bring forth the development of more efficient probiotic products.
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Affiliation(s)
- Lorena Dutra-Silva
- Food Science and Technology Department, Federal University of Santa Catarina, Florianópolis, SC, Brazil
| | - Filipe P Matteoli
- Department of Soil Science, Luiz de Queiroz College of Agriculture, Piracicaba, SP, Brazil.
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30
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Health-Promoting Properties of Lacticaseibacillus paracasei: A Focus on Kefir Isolates and Exopolysaccharide-Producing Strains. Foods 2021; 10:foods10102239. [PMID: 34681288 PMCID: PMC8534925 DOI: 10.3390/foods10102239] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 01/13/2023] Open
Abstract
Among artisanal fermented beverages, kefir (fermented milk drink) and water kefir (fermented nondairy beverage) are of special interest because their grains can be considered natural reservoirs of safe and potentially probiotic strains. In the last years, several reports on Lacticaseibacillus paracasei (formerly Lactobacillus paracasei) isolated from both artisanal fermented beverages were published focusing on their health-promoting properties. Although this is not the predominant species in kefir or water kefir, it may contribute to the health benefits associated to the consumption of the fermented beverage. Since the classification of L. paracasei has been a difficult task, the selection of an adequate method for identification, which is essential to avoid mislabeling in products, publications, and some publicly available DNA sequences, is discussed in the present work. The last findings in health promoting properties of L. paracasei and the bioactive compounds are described and compared to strains isolated from kefir, providing a special focus on exopolysaccharides as effector molecules. The knowledge of the state of the art of Lacticaseibacillus paracasei from kefir and water kefir can help to understand the contribution of these microorganisms to the health benefits of artisanal beverages as well as to discover new probiotic strains for applications in food industry.
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31
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Huang Z, Zhou X, Stanton C, Ross RP, Zhao J, Zhang H, Yang B, Chen W. Comparative Genomics and Specific Functional Characteristics Analysis of Lactobacillus acidophilus. Microorganisms 2021; 9:microorganisms9091992. [PMID: 34576887 PMCID: PMC8464880 DOI: 10.3390/microorganisms9091992] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/09/2021] [Accepted: 09/16/2021] [Indexed: 01/26/2023] Open
Abstract
Lactobacillus acidophilus is a common kind of lactic acid bacteria usually found in the human gastrointestinal tract, oral cavity, vagina, and various fermented foods. At present, many studies have focused on the probiotic function and industrial application of L. acidophilus. Additionally, dozens of L. acidophilus strains have been genome sequenced, but there has been no research to compare them at the genomic level. In this study, 46 strains of L. acidophilus were performed comparative analyses to explore their genetic diversity. The results showed that all the L. acidophilus strains were divided into two clusters based on ANI values, phylogenetic analysis and whole genome comparison, due to the difference of their predicted gene composition of bacteriocin operon, CRISPR-Cas systems and prophages mainly. Additionally, L. acidophilus was a pan-genome open species with a difference in carbohydrates utilization, antibiotic resistance, EPS operon, surface layer protein operon and other functional gene composition. This work provides a better understanding of L. acidophilus from a genetic perspective, and offers a frame for the biotechnological potentiality of this species.
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Affiliation(s)
- Zheng Huang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Z.H.); (X.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Xingya Zhou
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Z.H.); (X.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Catherine Stanton
- International Joint Research Laboratory for Pharmabiotics & Antibiotic Resistance, Jiangnan University, Wuxi 214122, China; (C.S.); (R.P.R.)
- APC Microbiome Ireland, University College Cork, T12 K8AF Cork, Ireland
- Teagasc Food Research Centre, Moorepark, Fermoy, P61 C996 Cork, Ireland
| | - Reynolds Paul Ross
- International Joint Research Laboratory for Pharmabiotics & Antibiotic Resistance, Jiangnan University, Wuxi 214122, China; (C.S.); (R.P.R.)
- APC Microbiome Ireland, University College Cork, T12 K8AF Cork, Ireland
| | - Jianxin Zhao
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Z.H.); (X.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
| | - Hao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Z.H.); (X.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
- Wuxi Translational Medicine Research Center and Jiangsu Translational Medicine Research Institute Wuxi Branch, Wuxi 214122, China
| | - Bo Yang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Z.H.); (X.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- International Joint Research Laboratory for Pharmabiotics & Antibiotic Resistance, Jiangnan University, Wuxi 214122, China; (C.S.); (R.P.R.)
- Correspondence: ; Tel.: +86-510-8591-2155
| | - Wei Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (Z.H.); (X.Z.); (J.Z.); (H.Z.); (W.C.)
- School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
- National Engineering Research Center for Functional Food, Jiangnan University, Wuxi 214122, China
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32
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Kim E, Yang SM, Kim HY. Differentiation of Lacticaseibacillus zeae Using Pan-Genome Analysis and Real-Time PCR Method Targeting a Unique Gene. Foods 2021; 10:foods10092112. [PMID: 34574222 PMCID: PMC8468013 DOI: 10.3390/foods10092112] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/03/2021] [Accepted: 09/06/2021] [Indexed: 11/16/2022] Open
Abstract
Lacticaseibacillus zeae strains, isolated from raw milk and fermented dairy products, are closely related to the Lacticaseibacillus species that has beneficial probiotic properties. However, it is difficult to distinguish those using conventional methods. In this study, a unique gene was revealed to differentiate L. zeae from other strains of the Lacticaseibacillus species and other species by pan-genome analysis, and a real-time PCR method was developed to rapidly and accurately detect the unique gene. The genome analysis of 141 genomes yielded an 17,978 pan-genome. Among them, 18 accessory genes were specifically present in five genomes of L. zeae. The glycosyltransferase family 8 was identified as a unique gene present only in L. zeae and not in 136 other genomes. A primer designed from the unique gene accurately distinguished L. zeae in pure and mixed DNA and successfully constructed the criterion for the quantified standard curve in real-time PCR. The real-time PCR method was applied to 61 strains containing other Lacticaseibacillus species and distinguished L. zeae with 100% accuracy. Also, the real-time PCR method was proven to be superior to the 16S rRNA gene method in the identification of L. zeae.
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Affiliation(s)
| | | | - Hae-Yeong Kim
- Correspondence: ; Tel.: +82-31-201-2600; Fax: +82-31-204-8116
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33
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Zhang C, Yu X, Wang D, Gui Y, Wang C, Li Q, Wang J, Yin B, Pan Z, Gu R. Rapid strain-specific identification of two Lactobacillus rhamnosus strains using PCR based on gene family analysis. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2021.111395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Dimitrovski D, Dimitrovska‐Vetadjoka M, Hristov H, Doneva‐Shapceska D. Developing probiotic pumpkin juice by fermentation with commercial probiotic strain
Lactobacillus casei
431. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15245] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Darko Dimitrovski
- Department of Food Technology and Biotechnology Faculty of Technology and Metallurgy Ss. Cyril and Methodius University Skopje North Macedonia
| | | | | | - Donka Doneva‐Shapceska
- Department of Food Technology and Biotechnology Faculty of Technology and Metallurgy Ss. Cyril and Methodius University Skopje North Macedonia
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Jussiaux F, Miot-Sertier C, Nguyen-Lopez D, Badet C, Samot J. Reliability of MALDI-TOF mass spectrometry to identify oral isolates of Streptococcus salivarius and Lactobacillus spp. Arch Oral Biol 2020; 121:104983. [PMID: 33242690 DOI: 10.1016/j.archoralbio.2020.104983] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 10/29/2020] [Accepted: 11/04/2020] [Indexed: 11/18/2022]
Abstract
OBJECTIVE The aim of this study is to evaluate the performance of MALDI-TOF mass spectrometry in identifying bacteria isolated in the oral cavity known to be of probiotic interest. DESIGN We evaluated Bruker MALDI Biotyper for the identification of 92 clinical oral isolates of probiotic interest (31 Streptococcus salivarius and 61 Lactobacillus spp.) by comparing direct colony method with on-plate formic acid extraction. Isolates were previously identified by use of biochemical methods and molecular biology. RESULTS Using the manufacturer's suggested genus and species level cutoff scores, the direct colony method identified 42 (45.7%) isolates at the genus level and 35 (38%) at the species level while the on-plate extraction method correctly identified 90 (97.8%) isolates at the genus level and 82 (89.1%) at the species level. The difference between the two methods was statistically significant at the genus and species levels (P ≤ 0.0001). After dividing the isolates into two subgroups, the analysis was repeated. The direct colony method identified correctly all isolates of Streptococcus salivarius at the species level. In contrast, the direct colony method allowed the identification of only 11 (18%) lactobacilli at the genus level and 4 (6.6%) at the species level. The on-plate extraction method was statistically (P ≤ 0.0001) more efficient since 59 (96.7%) lactobacilli were identified at the genus level and 51 (83.6%) at the species level. CONCLUSIONS MALDI Biotyper can efficiently identify Streptococcus salivarius regardless of the preparative method but on-plate extraction is superior to direct colony method for the identification of lactobacilli.
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Affiliation(s)
| | - Cécile Miot-Sertier
- Univ. Bordeaux, ISVV, EA 4577, Unité de Recherche Œnologie, USC 1366 INRAE, F-33140 Villenave d'Ornon, France
| | - Darrène Nguyen-Lopez
- Centre Hospitalier Universitaire de Bordeaux, Pôle de Médecine et Chirurgie Bucco-Dentaire, Bordeaux, France
| | - Cécile Badet
- Univ. Bordeaux, UFR des Sciences Odontologiques, Bordeaux, France; Univ. Bordeaux, ISVV, EA 4577, Unité de Recherche Œnologie, USC 1366 INRAE, F-33140 Villenave d'Ornon, France; Centre Hospitalier Universitaire de Bordeaux, Pôle de Médecine et Chirurgie Bucco-Dentaire, Bordeaux, France
| | - Johan Samot
- Univ. Bordeaux, UFR des Sciences Odontologiques, Bordeaux, France; Univ. Bordeaux, ISVV, EA 4577, Unité de Recherche Œnologie, USC 1366 INRAE, F-33140 Villenave d'Ornon, France; Centre Hospitalier Universitaire de Bordeaux, Pôle de Médecine et Chirurgie Bucco-Dentaire, Bordeaux, France.
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Dioso CM, Vital P, Arellano K, Park H, Todorov SD, Ji Y, Holzapfel W. Do Your Kids Get What You Paid for? Evaluation of Commercially Available Probiotic Products Intended for Children in the Republic of the Philippines and the Republic of Korea. Foods 2020; 9:E1229. [PMID: 32899215 PMCID: PMC7555838 DOI: 10.3390/foods9091229] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 08/28/2020] [Accepted: 08/31/2020] [Indexed: 12/18/2022] Open
Abstract
A wide range of probiotic products is available on the market and can be easily purchased over the counter and unlike pharmaceutical drugs, their commercial distribution is not strictly regulated. In this study, ten probiotic preparations commercially available for children's consumption in the Republic of the Philippines (PH) and the Republic of Korea (SK) have been investigated. The analyses included determination of viable counts and taxonomic identification of the bacterial species present in each formulation. The status of each product was assessed by comparing the results with information and claims provided on the label. In addition to their molecular identification, safety assessment of the isolated strains was conducted by testing for hemolysis, biogenic amine production and antibiotic resistance. One out of the ten products contained lower viable numbers of recovered microorganisms than claimed on the label. Enterococcus strains, although not mentioned on the label, were isolated from four products. Some of these isolates produced biogenic amines and were resistant to one or several antibiotics. Metagenomic analyses of two products revealed that one product did not contain most of the microorganisms declared in its specification. The study demonstrated that some commercial probiotic products for children did not match their label claims. Infants and young children belong to the most vulnerable members of society, and food supplements including probiotics destined for this consumer group require careful checking and strict regulation before commercial distribution.
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Affiliation(s)
- Clarizza May Dioso
- Institute of Biology, College of Science, University of the Philippines Diliman, Quezon City 1101, Philippines;
- Advanced Green Energy and Environment Department, Handong Global University, Pohang, Gyungbuk 37554, Korea; (K.A.); (H.P.); (S.D.T.)
| | - Pierangeli Vital
- Natural Sciences Research Institute, University of the Philippines Diliman, Quezon City 1101, Philippines;
| | - Karina Arellano
- Advanced Green Energy and Environment Department, Handong Global University, Pohang, Gyungbuk 37554, Korea; (K.A.); (H.P.); (S.D.T.)
| | - Haryung Park
- Advanced Green Energy and Environment Department, Handong Global University, Pohang, Gyungbuk 37554, Korea; (K.A.); (H.P.); (S.D.T.)
- HEM Inc., Business Incubator, Handong Global University, Pohang, Gyungbuk 37554, Korea;
| | - Svetoslav Dimitrov Todorov
- Advanced Green Energy and Environment Department, Handong Global University, Pohang, Gyungbuk 37554, Korea; (K.A.); (H.P.); (S.D.T.)
| | - Yosep Ji
- HEM Inc., Business Incubator, Handong Global University, Pohang, Gyungbuk 37554, Korea;
| | - Wilhelm Holzapfel
- Advanced Green Energy and Environment Department, Handong Global University, Pohang, Gyungbuk 37554, Korea; (K.A.); (H.P.); (S.D.T.)
- HEM Inc., Business Incubator, Handong Global University, Pohang, Gyungbuk 37554, Korea;
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Hussein WE, Huang E, Ozturk I, Somogyi Á, Yang X, Liu B, Yousef AE. Genome-Guided Mass Spectrometry Expedited the Discovery of Paraplantaricin TC318, a Lantibiotic Produced by Lactobacillus paraplantarum Strain Isolated From Cheese. Front Microbiol 2020; 11:1381. [PMID: 32760356 PMCID: PMC7372301 DOI: 10.3389/fmicb.2020.01381] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/28/2020] [Indexed: 11/13/2022] Open
Abstract
The quest for potent alternatives to the currently used antimicrobials is urged by health professionals, considering the rapid rise in resistance to preservatives and antibiotics among pathogens. The current study was initiated to search for novel and effective bacteriocins from food microbes, preferably lactic acid bacteria (LAB), for potential use as preservatives. Advances in genome-guided mass spectrometry (MS) were implemented to expedite identifying and elucidating the structure of the recovered antimicrobial agent. A LAB strain, OSY-TC318, was isolated from a Turkish cheese, and the crude extract of the cultured strain inhibited the growth of various pathogenic and spoilage bacteria such as Bacillus cereus, Clostridium sporogenes, Enterococcus faecalis, Listeria monocytogenes, Salmonella enterica ser. Typhimurium, and Staphylococcus aureus. The antimicrobial producer was identified as Lactobacillus paraplantarum using MS biotyping and genomic analysis. Additionally, L. paraplantarum OSY-TC318 was distinguished from closely related strains using comparative genomic analysis. Based on in silico analysis, the genome of the new strain contained a complete lantibiotic biosynthetic gene cluster, encoding a novel lantibiotic that was designated as paraplantaricin TC318. The bioinformatic analysis of the gene cluster led to the prediction of the biosynthetic pathway, amino acid sequence, and theoretical molecular mass of paraplantaricin TC318. To verify the genomic analysis predictions, paraplantaricin TC318 was purified from the producer cellular crude extract using liquid chromatography, followed by structural elucidation using Fourier transform ion cyclotron resonance MS analysis. This genome-guided MS analysis revealed that the molecular mass of paraplantaricin TC318 is 2,263.900 Da, its chemical formula is C106H133N27O22S4, and its primary sequence is F-K-S-W-S-L-C-T-F-G-C-G-H-T-G-S-F-N-S-F-C-C. This lantibiotic, which differs from mutacin 1140 at positions 9, 12, 13, and 20, is considered a new member of the epidermin group in class I lantibiotics. In conclusion, the study revealed a new L. paraplantarum strain producing a novel lantibiotic that is potentially useful in food and medical applications.
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Affiliation(s)
- Walaa E Hussein
- Department of Food Science and Technology, The Ohio State University, Columbus, OH, United States.,Department of Microbiology and Immunology, National Research Center, Giza, Egypt
| | - En Huang
- Department of Environmental and Occupational Health, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - Ismet Ozturk
- Faculty of Fine Arts, Department of Gastronomy and Culinary Arts, Istanbul Arel University, Istanbul, Turkey
| | - Árpád Somogyi
- Campus Chemical Instrument Center, Mass Spectrometry and Proteomics Facility, The Ohio State University, Columbus, OH, United States
| | - Xu Yang
- Nutrition and Food Science Department, California State Polytechnic University Pomona, Pomona, CA, United States
| | - Baosheng Liu
- College of Animal Science Technology, Jiangxi Agricultural University, Nanchang, China
| | - Ahmed E Yousef
- Department of Food Science and Technology, The Ohio State University, Columbus, OH, United States.,Department of Microbiology, The Ohio State University, Columbus, OH, United States
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Milanović V, Osimani A, Garofalo C, Belleggia L, Maoloni A, Cardinali F, Mozzon M, Foligni R, Aquilanti L, Clementi F. Selection of cereal-sourced lactic acid bacteria as candidate starters for the baking industry. PLoS One 2020; 15:e0236190. [PMID: 32702068 PMCID: PMC7377444 DOI: 10.1371/journal.pone.0236190] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 06/30/2020] [Indexed: 01/17/2023] Open
Abstract
The quality of sourdough bread mainly depends on metabolic activities of lactic acid bacteria (LAB). The exopolysaccharides (EPS) produced by LAB affect positively the technological and nutritional properties of the bread, while phytases improve the bioavailability of the minerals by reducing its phytate content. In the present study, a pool of 152 cereal-sourced LAB were screened for production of phytases and EPS for potential use as sourdough starter cultures for the baking industry. There was large heterogeneity in the phytase activity observed among the screened isolates, with 95% showing the ability to degrade sodium phytate on plates containing Sourdough Simulation Medium (SSM). The isolates Lactobacillus brevis LD65 and Lactobacillus plantarum PB241 showed the highest enzymatic activity, while the isolates ascribed to Weissella confusa were characterized by low or no phytase activity. Only 18% of the screened LAB produced EPS, which were distinguished as ropy or mucoid phenotypes on SSM supplemented with sucrose. Almost all the EPS producers carried one or more genes (epsD/E and/or epsA) involved in the production of heteropolysaccharides (HePS), whereas the isolates ascribed to Leuconostoc citreum and W. confusa carried genes involved in the production of both HePS and homopolysaccharides (HoPS). Monosaccharide composition analysis of the EPS produced by a selected subset of isolates revealed that all the HePS included glucose, mannose, and galactose, though at different ratios. Furthermore, a few isolates ascribed to L. citreum and W. confusa and carrying the gtf gene produced β-glucans after fermentation in an ad hoc formulated barley flour medium. Based on the overall results collected, a subset of candidate sourdough starter cultures for the baking industry was selected, including Lb. brevis LD66 and L. citreum PB220, which showed high phytase activity and positive EPS production.
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Affiliation(s)
- Vesna Milanović
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Andrea Osimani
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Cristiana Garofalo
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Luca Belleggia
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Antonietta Maoloni
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Federica Cardinali
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Massimo Mozzon
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Roberta Foligni
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
| | - Lucia Aquilanti
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
- * E-mail: (FC); (LA)
| | - Francesca Clementi
- Dipartimento di Scienze Agrarie, Alimentari ed Ambientali, Università Politecnica delle Marche, Ancona, Italy
- * E-mail: (FC); (LA)
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Shehata HR, Newmaster SG. Combined Targeted and Non-targeted PCR Based Methods Reveal High Levels of Compliance in Probiotic Products Sold as Dietary Supplements in United States and Canada. Front Microbiol 2020; 11:1095. [PMID: 32582075 PMCID: PMC7295986 DOI: 10.3389/fmicb.2020.01095] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/01/2020] [Indexed: 12/28/2022] Open
Abstract
Probiotics are defined as "live microorganisms that, when administered in adequate amounts, confer a health benefit on the host." The diverse health benefits have contributed to rapid increase in probiotic consumption and in the value of probiotic market, valued at USD 46 billion in 2019. For probiotics to be effective, the correct species/strains should be delivered viable in an adequate dose. The most commonly used methods for species/strain identification are DNA based methods including targeted and non-targeted methods (e.g., high-throughput sequencing, HTS). Using different DNA based methods, previous studies reported several cases of non-compliance in probiotic products. The objectives of this study are to evaluate levels of compliance in probiotic products (presence of all declared species/strains, absence of any contaminants or undeclared species, and meeting the declared minimum viable cell count) and to compare the performance of targeted and non-targeted methods in probiotic authentication. To the best of our knowledge, this is the largest study of its kind, testing 182 probiotic products, containing a total of 520 strains, collected from United States and Canada. Using species-specific assays, 11 species could not be detected in ten products. Missing species were Lactobacillus casei in seven products, Bifidobacterium longum and Bifidobacterium bifidum in one product, B. longum in one product while B. longum subsp. longum was mislabeled as B. longum subsp. infantis in another. Additionally, undeclared Bifidobacterium animalis subsp. lactis was detected in one product. Viable count was determined for 72 samples and was found to be lower than declared in five samples, including one product showing no viable cells. Overall, non-compliance was observed in 15 out of 182 products (8%). Additionally, undeclared species at relative abundance of ∼1-2% were found in 14 products using HTS, however, their presence could not be confirmed using species-specific assays. The results show that targeted PCR based methods enable species and strain level identification. The results also highlight the need to continue to develop strain-specific assays appropriate for use with multi-strain products. True strain-specific assays will enable strain authentication in both single-strain products and multi-strain products to ensure probiotic products meet the label claims and ensure probiotic efficacy.
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Affiliation(s)
- Hanan R Shehata
- NHP Research Alliance, College of Biological Sciences, University of Guelph, Guelph, ON, Canada.,Department of Microbiology, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - Steven G Newmaster
- NHP Research Alliance, College of Biological Sciences, University of Guelph, Guelph, ON, Canada
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Jarocki P, Komoń-Janczara E, Glibowska A, Dworniczak M, Pytka M, Korzeniowska-Kowal A, Wzorek A, Kordowska-Wiater M. Molecular Routes to Specific Identification of the Lactobacillus Casei Group at the Species, Subspecies and Strain Level. Int J Mol Sci 2020; 21:ijms21082694. [PMID: 32294944 PMCID: PMC7216162 DOI: 10.3390/ijms21082694] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/05/2020] [Accepted: 04/10/2020] [Indexed: 12/12/2022] Open
Abstract
The genus Lactobacillus includes, among others, Lactobacillus casei, Lactobacillus paracasei and Lactobacillus rhamnosus, species that are collectively referred to as the Lactobacillus casei group. Many studies have shown that strains belonging to this group may decrease lactose intolerance, the effects of inflammatory bowel disease, diarrhea, constipation, food allergies and even colon cancer. Moreover, evidences exists of positive effects of these bacteria on mucosal immunity and blood cholesterol level. Because of their beneficial influence on human health, many of them are used as food additives and probiotic pharmaceuticals. It should be stressed that health-promoting properties are not attributed at the species level, but to specific strains. Therefore, procedures are necessary to allow specific identification at each phylogenetic level-genus, species and strain. In this paper we present a practical overview of molecular methods for the identification and differentiation of L. casei bacteria. The research included 30 bacterial strains belonging to three species: L.casei, L. paracasei and L. rhamnosus. Among the tested procedures were genus- and species-specific PCR, multiplex-PCR, Real-Time HRM analysis, RFLP-PCR, rep-PCR, RAPD-PCR, AFLP-PCR, and proteomic methods such as MALDI-TOF MS typing and SDS-PAGE fingerprinting. The obtained results showed that multiplex-PCR and MALDI-TOF MS turned out to be the most useful methods to identify the tested bacteria at the species level. At the strain level, the AFLP-PCR method showed the highest discriminatory power. We hope that the presented results will allow for the easy selection of an appropriate procedure, depending on the experiment conducted and the equipment capabilities of any given laboratory.
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Affiliation(s)
- Piotr Jarocki
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
- Correspondence: (P.J.); (M.K.-W.); Tel.: +48-81462-3351 (P.J.)
| | - Elwira Komoń-Janczara
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Agnieszka Glibowska
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Michał Dworniczak
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Monika Pytka
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Agnieszka Korzeniowska-Kowal
- Polish Collection of Microorganisms (PCM), Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland; (A.K.-K.); (A.W.)
| | - Anna Wzorek
- Polish Collection of Microorganisms (PCM), Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland; (A.K.-K.); (A.W.)
| | - Monika Kordowska-Wiater
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
- Correspondence: (P.J.); (M.K.-W.); Tel.: +48-81462-3351 (P.J.)
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Kim E, Yang SM, Cho EJ, Kim HY. Novel real-time PCR assay for Lactobacillus casei group species using comparative genomics. Food Microbiol 2020; 90:103485. [PMID: 32336352 DOI: 10.1016/j.fm.2020.103485] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 12/20/2019] [Accepted: 03/11/2020] [Indexed: 12/14/2022]
Abstract
The Lactobacillus casei group, which includes the closely related species L. casei, L. paracasei, L. rhamnosus, and L. chiayiensis, has been under debate regarding its taxonomy because of the difficulty in distinguishing the species from each other. In the present study, we developed a novel real-time PCR assay for distinguishing the L. casei group species. The pan-genome, as determined by the genomes of 44 strains, comprised 6789 genes, comparative genomic analysis showed that L. casei group strains were classified by species. Based on these results, species-specific genes were identified, and primers were designed from those genes. Real-time PCR clearly distinguished each species of the L. casei group and specifically amplified only to the target species. The method was applied to 29 probiotic products, and the detected results and label claims were compared. Total 23 products were in accordance with the label claims, and the remaining products contained species different from those stated in the label claims. Our method can rapidly and accurately distinguish the L. casei group species in a single reaction. Hence, our assay can be applied to identify L. casei group species from food or environmental samples and to accurately determine the nomenclature of the species.
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Affiliation(s)
- Eiseul Kim
- Institute of Life Sciences and Resources and Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, South Korea
| | - Seung-Min Yang
- Institute of Life Sciences and Resources and Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, South Korea
| | - Eun-Ji Cho
- Institute of Life Sciences and Resources and Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, South Korea
| | - Hae-Yeong Kim
- Institute of Life Sciences and Resources and Department of Food Science and Biotechnology, Kyung Hee University, Yongin, 17104, South Korea.
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Antibiofilm Activity of Kefir Probiotic Lactobacilli Against Uropathogenic Escherichia coli (UPEC). Avicenna J Med Biotechnol 2020; 12:221-229. [PMID: 33014313 PMCID: PMC7502162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/29/2022] Open
Abstract
BACKGROUND Inhibition of biofilm formation is essential for the prevention and treatment of urinary tract infection. This study was aimed to identify the probiotic potential of Lactobacillus strains isolated from kefir and evaluate their antimicrobial and antibiofilm activities against Uropathogenic Escherichia coli (UPEC). METHODS Twelve Lactobacillus strains were evaluated. Antimicrobial and antibiofilm activities of Cell Free Supernatant (CFS) of the Lactobacillus strains against UPEC isolates were evaluated by agar well diffusion method and crystal violet assay, respectively. Probiotic potential of selected isolates was assessed by analyzing their tolerance to acidic pH and bile salts, auto-aggregation ability, co-aggregation with Escherichia coli (E. coli) and hemolytic activity. The isolates were identified by phenotypic and 16S rRNA gene sequencing. RESULTS The CFS of all lactobacilli strains was able to inhibit UPEC isolates even after neutralization. Four out of 12 isolates inhibited the biofilm formation by UPEC in the range 62-75%. The viability under acidic condition varied among the isolates ranging from 6-89.8%. All the isolates could tolerate the 0.3% bile and eight isolates showed the adaptation time of less than 1 hr. All the strains exhibited co-aggregation with E. coli. Auto-aggregation was highly correlated with co-aggregation of all lactobacilli strains with E. coli (r=0.889, p<0.001). The isolates with satisfactory probiotic potential and higher ability of biofilm inhibition and antibacterial activity belonged to the species Lactobacillus rhamnosus and Lactobacillus paracasei. CONCLUSION All four selected probiotic strains exhibited antimicrobial and antibiofilm activities, which suggest potential applications for controlling or preventing infections caused by UPEC.
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Reanalysis of Lactobacillus paracasei Lbs2 Strain and Large-Scale Comparative Genomics Places Many Strains into Their Correct Taxonomic Position. Microorganisms 2019; 7:microorganisms7110487. [PMID: 31731444 PMCID: PMC6920896 DOI: 10.3390/microorganisms7110487] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 10/08/2019] [Accepted: 10/14/2019] [Indexed: 12/11/2022] Open
Abstract
Lactobacillus paracasei are diverse Gram-positive bacteria that are very closely related to Lactobacillus casei, belonging to the Lactobacillus casei group. Due to extreme genome similarities between L. casei and L. paracasei, many strains have been cross placed in the other group. We had earlier sequenced and analyzed the genome of Lactobacillus paracasei Lbs2, but mistakenly identified it as L. casei. We re-analyzed Lbs2 reads into a 2.5 MB genome that is 91.28% complete with 0.8% contamination, which is now suitably placed under L. paracasei based on Average Nucleotide Identity and Average Amino Acid Identity. We took 74 sequenced genomes of L. paracasei from GenBank with assembly sizes ranging from 2.3 to 3.3 MB and genome completeness between 88% and 100% for comparison. The pan-genome of 75 L. paracasei strains hold 15,945 gene families (21,5232 genes), while the core genome contained about 8.4% of the total genes (243 gene families with 18,225 genes) of pan-genome. Phylogenomic analysis based on core gene families revealed that the Lbs2 strain has a closer relationship with L. paracasei subsp. tolerans DSM20258. Finally, the in-silico analysis of the L. paracasei Lbs2 genome revealed an important pathway that could underpin the production of thiamin, which may contribute to the host energy metabolism.
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Tadros M, Cabrera A, Matukas LM, Muller M. Evaluation of Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry and ClinPro Tools as a Rapid Tool for Typing Streptococcus pyogenes. Open Forum Infect Dis 2019; 6:ofz441. [PMID: 31700941 PMCID: PMC6825801 DOI: 10.1093/ofid/ofz441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 10/03/2019] [Indexed: 11/30/2022] Open
Abstract
Background Timely strain typing of group A Streptococci (GAS) is necessary to guide outbreak recognition and investigation. We evaluated the use of (matrix-assisted laser desorption ionization time-of-flight mass spectrometry) combined with cluster analysis software to rapidly distinguish between related and unrelated GAS isolates in real-time. Methods We developed and validated a typing model using 177 GAS isolates with known emm types. The typing model was created using 43 isolates, which included 8 different emm types, and then validated using 134 GAS isolates of known emm types that were not included in model generation. Results Twelve spectra were generated from each isolate during validation. The overall accuracy of the model was 74% at a cutoff value of 80%. The model performed well with emm types 4, 59, and 74 but showed poor accuracy for emm types 1, 3, 12, 28, and 101. To evaluate the ability of this tool to perform typing in an outbreak situation, we evaluated a virtual outbreak model using a “virtual outbreak strain; emm74” compared with a non-outbreak group or an “outgroup “ of other emm types. External validation of this model showed an accuracy of 91.4%. Conclusions This approach has the potential to provide meaningful information that can be used in real time to identify and manage GAS outbreaks. Choosing isolates characterized by whole genome sequencing rather than emm typing for model generation should improve the accuracy of this approach in rapidly identifying related and unrelated GAS strains.
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Affiliation(s)
- Manal Tadros
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Division of Microbiology, Unity Health Toronto, Toronto, Ontario, Canada
| | - Ana Cabrera
- Department of Pathology and Laboratory Medicine, Schulich School of Medicine & Dentistry, Western University, London, Ontario, Canada.,Division of Microbiology, Pathology and Laboratory Medicine, London Health Sciences Centre, London, Ontario, Canada
| | - Larissa M Matukas
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada.,Division of Microbiology, Unity Health Toronto, Toronto, Ontario, Canada.,Department of Medicine, University of Toronto, Toronto, Ontario, Canada.,Division of Infectious Diseases, Unity Health Toronto, Toronto, Ontario, Canada
| | - Matthew Muller
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada.,Division of Infectious Diseases, Unity Health Toronto, Toronto, Ontario, Canada
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Sekhon MK, Grubb PH, Newman M, Yoder BA. Implementation of a probiotic protocol to reduce rates of necrotizing enterocolitis. J Perinatol 2019; 39:1315-1322. [PMID: 31358866 DOI: 10.1038/s41372-019-0443-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 06/14/2019] [Accepted: 06/21/2019] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To utilize a probiotic protocol to achieve a 50% reduction in rates of necrotizing enterocolitis (NEC) ≥ Bell Stage 2 within 2 years of protocol implementation. STUDY DESIGN Literature review guided probiotic selection and protocol design. A driver diagram identified key drivers to achieve our aim. A U chart followed monthly NEC ≥ Bell Stage 2 per 100 patient days and per monthly admissions. The process measure was protocol compliance and the balancing measure was probiotic sepsis. RESULTS NEC ≥ Bell Stage 2 decreased from 0.14 to 0.04 per 100 patient days in infants < 33 weeks gestation or <1500 g, or a yearly rate of 7-2%. Protocol compliance was 98% and there were no cases of probiotic sepsis. CONCLUSION Implementation of a probiotic protocol was associated with a decrease in rates of NEC.
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Affiliation(s)
- Mehtab K Sekhon
- Division of Neonatology, University of Utah School of Medicine, Salt Lake City, UT, USA.
| | - Peter H Grubb
- Division of Neonatology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Michael Newman
- Data Science Services, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Bradley A Yoder
- Division of Neonatology, University of Utah School of Medicine, Salt Lake City, UT, USA
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Hazırolan G, Gündoğdu A, Nigiz S, Altun B, Gür D. Presence of OXA-48 Gene in a Clinical Isolate of Lactobacillus rhamnosus. Foodborne Pathog Dis 2019; 16:840-843. [PMID: 31373839 DOI: 10.1089/fpd.2019.2651] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
Lactobacilli are part of the microbiota and are also used as probiotics. However, in recent years they have been associated with invasive infections, especially bacteremia. Lactobacillus spp. are usually susceptible to penicillins, macrolides, and carbapenems, but Lactobacillus rhamnosus is intrinsically resistant to glycopeptides. The aim of this study was to determine the antimicrobial susceptibility profile and resistance mechanism of a clinical isolate of L. rhamnosus isolated from 10 sets of blood cultures of the same patient. The isolate was identified by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (Bruker Daltonics; BD, Bremen, Germany) and 16S rRNA gene sequencing. In vitro susceptibilities to penicillin, ampicillin, imipenem, vancomycin, erythromycin, clindamycin, and linezolid were determined with gradient test strips (bioMérieux, France) on Mueller-Hinton agar plates supplemented with 5% defibrinated horse blood and 20 mg/L β-NAD. The isolate was resistant to vancomycin and imipenem. Polymerase chain reaction test was positive for blaOXA-48 and the presence of this carbapenemase was confirmed by gene sequencing. Although plasmid analysis suggested that the blaOXA-48 is chromosomal in this isolate, it is still an alarming finding for potential transmission of antibiotic resistance genes to other bacteria in the gut. To our knowledge, this is the first report of the presence of blaOXA-48 in a Lactobacillus spp. and has utmost importance as these bacteria are used as probiotics. The isolation of these bacteria from sterile body sites should not go unnoticed.
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Affiliation(s)
- Gülşen Hazırolan
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Aycan Gündoğdu
- Department of Medical Microbiology, Faculty of Medicine, Erciyes University, Kayseri, Turkey
| | - Seyma Nigiz
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Belgin Altun
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Deniz Gür
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Okai C, Itani Y, Furuta A, Mizunoe Y, Iwase T. Rapid Identification and Quantification of Lactobacillus rhamnosus by Real-Time PCR Using a TaqMan Probe. Jpn J Infect Dis 2019; 72:323-325. [PMID: 31061362 DOI: 10.7883/yoken.jjid.2019.102] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Lactobacillus rhamnosus is a gram-positive, rod-shaped bacterium and is commonly used as a probiotic to maintain intestinal health. Recently, surveillance of Lactobacillus bacteremia was conducted using a biochemical test and conventional PCR assay; however, these assays are unable to quantify the target and might yield a false positive result. In this study, we developed an L. rhamnosus-specific quantitative PCR assay, which yields accurate and reproducible results on the basis of the specificity of a TaqMan probe targeting the unique 16S rDNA sequence of L. rhamnosus. The assay specifically detected the target bacterium, L. rhamnosus, and no nonspecific signals were generated under the assay conditions. With genomic DNA from the cells of L. rhamnosus (101 to 106 cells), the threshold cycle values showed a linear dependence (R2 = 0.9993). This L. rhamnosus-specific quantitative PCR assay can advance the research into the effects of this microorganism on microflora, microbial infections, and on the host.
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Affiliation(s)
- Chiaki Okai
- Department of Bacteriology, The Jikei University School of Medicine.,Core Research Facilities for Basic Science, Research Center for Medical Sciences, The Jikei University School of Medicine
| | - Yoshiro Itani
- Department of Bacteriology, The Jikei University School of Medicine.,Core Research Facilities for Basic Science, Research Center for Medical Sciences, The Jikei University School of Medicine
| | - Akira Furuta
- Department of Urology, The Jikei University School of Medicine
| | | | - Tadayuki Iwase
- Department of Bacteriology, The Jikei University School of Medicine.,Core Research Facilities for Basic Science, Research Center for Medical Sciences, The Jikei University School of Medicine
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Ricciardi A, Zotta T, Ianniello RG, Boscaino F, Matera A, Parente E. Effect of Respiratory Growth on the Metabolite Production and Stress Robustness of Lactobacillus casei N87 Cultivated in Cheese Whey Permeate Medium. Front Microbiol 2019; 10:851. [PMID: 31068919 PMCID: PMC6491770 DOI: 10.3389/fmicb.2019.00851] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Accepted: 04/02/2019] [Indexed: 01/02/2023] Open
Abstract
Cheese whey permeate (WP) is a low-cost feedstock used for the production of biomass and metabolites from several lactic acid bacteria (LAB) strains. In this study, Lactobacillus casei N87 was cultivated in an optimized WP medium (WPM) to evaluate the effect of anaerobic and respiratory conditions on the growth performances (kinetics, biomass yield), consumption of sugars (lactose, galactose, glucose) and citrate, metabolite production [organic acids, volatile organic compounds (VOCs)] and stress survival (oxidative, heat, freezing, freeze-drying). The transcription of genes involved in the main pathways for pyruvate conversion was quantified through Real Time-PCR to elucidate the metabolic shifts due to respiratory state. Cultivation in WPM induced a diauxic growth in both anaerobic and respiratory conditions, and L. casei N87 effectively consumed the lactose and galactose present in WPM. Genomic information suggested that membrane PTS system and tagatose-6-P pathway mediated the metabolism of lactose and galactose in L. casei N87. Respiration did not affect specific growth rate and biomass production, but significantly altered the pyruvate conversion pathways, reducing lactate accumulation and promoting the formation of acetate, acetoin and diacetyl to ensure the redox balance. Ethanol was not produced under either cultivation. Pyruvate oxidase (pox), acetate kinase (ack), α-acetolactate decarboxylase (ald), acetolactate synthase (als) and oxaloacetate decarboxylase (oad) genes were up-regulated under respiration, while L-lactate dehydrogenase (ldh), pyruvate formate lyase (pfl), pyruvate carboxylase (pyc), and phosphate acetyltransferase (pta) were down regulated by oxygen. Transcription analysis was consistent with metabolite production, confirming that POX-ACK and ALS-ALD were the alternative pathways activated under aerobic cultivation. Respiratory growth affected the production of volatile compounds useful for the development of aroma profile in several fermented foods, and promoted the survival of L. casei N87 to oxidative stresses and long-term storage. This study confirmed that the respiration-based technology coupled with cultivation on low-cost medium may be effectively exploited to produce competitive and functional starter and/or adjunct cultures. Our results, additionally, provided further information on the activation and regulation of metabolic pathways in homofermentative LAB grown under respiratory promoting conditions.
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Affiliation(s)
- Annamaria Ricciardi
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Teresa Zotta
- Istituto di Scienze dell'Alimentazione - Consiglio Nazionale delle Ricerche (CNR), Avellino, Italy
| | - Rocco Gerardo Ianniello
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Floriana Boscaino
- Istituto di Scienze dell'Alimentazione - Consiglio Nazionale delle Ricerche (CNR), Avellino, Italy
| | - Attilio Matera
- Scuola di Scienze Agrarie, Forestali, Alimentari e Ambientali, Università degli Studi della Basilicata, Potenza, Italy
| | - Eugenio Parente
- Dipartimento di Scienze, Università degli Studi della Basilicata, Potenza, Italy
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Bottari B, Levante A, Neviani E, Gatti M. How the Fewest Become the Greatest. L. casei's Impact on Long Ripened Cheeses. Front Microbiol 2018; 9:2866. [PMID: 30524419 PMCID: PMC6262004 DOI: 10.3389/fmicb.2018.02866] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 11/07/2018] [Indexed: 12/23/2022] Open
Abstract
Members of the Lactobacillus casei group, including species classified currently as L. casei, L. paracasei, and L. rhamnosus, are among the most frequently found species in raw milk, hard cooked, long-ripened cheeses. Starting from very low numbers in raw milk, they become dominant in the cheese during ripening, selected by physical and chemical changes produced by cheese making and ripening. Their presence at different stages of cheese making and ripening is crucial in defining product features. For these reasons, the scientific community has been more and more interested in studying these “tiny but mighty microbes” and their implications during cheese making and ripening. The present paper reviews the current literature on the effect of L. casei in cheeses, with particular reference to the case of Parmigiano Reggiano and Grana Padano, two of the most famous PDO (Protected Designation of Origin) Italian cheeses. Recent advances regarding the selection of new wild strains able to persist until the end of ripening and carrying out slow but crucial activities resulting in specific aromatic features, are also presented.
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Affiliation(s)
| | - Alessia Levante
- Department of Food and Drug, University of Parma, Parma, Italy
| | - Erasmo Neviani
- Department of Food and Drug, University of Parma, Parma, Italy
| | - Monica Gatti
- Department of Food and Drug, University of Parma, Parma, Italy
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