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Reale A, Puppo MC, Boscaino F, Garzon AG, Drago SR, Marulo S, Di Renzo T. Development and Evaluation of a Fermented Pistachio-Based Beverage Obtained by Colloidal Mill. Foods 2024; 13:2342. [PMID: 39123534 PMCID: PMC11312421 DOI: 10.3390/foods13152342] [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: 06/14/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 08/12/2024] Open
Abstract
The aim of the present study was to develop a fermented pistachio beverage as a plant-based alternative to milk-based drinks. For this purpose, a colloidal mill was used to finely grind and homogenize the pistachios to obtain a homogeneous consistency and prevent sedimentation. In addition, lactic acid bacteria fermentation was used to develop unique flavours and characteristics in the final product and to achieve microbiological stability for up to 30 days of storage a 4 °C. The formulated beverages were evaluated for chemical-physical characteristics (pH, organic acid production, and fructose, sucrose, and glucose content), nutritional profile (proximate composition, amino acid and GABA content), and volatile organic composition by HS-SPME-GC/MS analysis. The pistachio-based beverages were characterized by a good source of protein, fat, fiber, and minerals (mainly K and P). The colloidal mill contributed to creating a homogeneous texture and to making the nutrients readily available to the starter microorganisms, which reached concentrations above 108 ufc/mL in the final products. The beverages were characterized by pronounced acidity and some by the presence of acetoin and 2,3-butanedione, volatile components associated with a yogurt- or kefir-like aroma. This innovative approach provides an alternative to traditional milk-based beverages and highlights the role of LAB in the development of nutritious and attractive plant-based beverages.
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Affiliation(s)
- Anna Reale
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
| | | | - Floriana Boscaino
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
| | - Antonela Guadalupe Garzon
- Instituto de Tecnología de Alimentos, CONICET, Facultad de Ingeniería Química—Universidad Nacional del Litoral, 1° de Mayo 3250, Santa Fe 3000, Argentina; (A.G.G.); (S.R.D.)
| | - Silvina Rosa Drago
- Instituto de Tecnología de Alimentos, CONICET, Facultad de Ingeniería Química—Universidad Nacional del Litoral, 1° de Mayo 3250, Santa Fe 3000, Argentina; (A.G.G.); (S.R.D.)
| | - Serena Marulo
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
| | - Tiziana Di Renzo
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
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Wong SP, Er YX, Tan SM, Lee SC, Rajasuriar R, Lim YAL. Oral and Gut Microbiota Dysbiosis is Associated with Mucositis Severity in Autologous Hematopoietic Stem Cell Transplantation: Evidence from an Asian Population. Transplant Cell Ther 2023; 29:633.e1-633.e13. [PMID: 37422196 DOI: 10.1016/j.jtct.2023.06.016] [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: 04/16/2023] [Revised: 06/17/2023] [Accepted: 06/26/2023] [Indexed: 07/10/2023]
Abstract
Mucositis is a debilitating complication of hematopoietic stem cell transplantation (HSCT). It is unclear how changes in the composition of microbiota, which are modulated by geographical location and ethnicity, may influence immune regulation leading to the development of mucositis, and the study of both oral and gut microbiota in a single population of autologous HSCT in the Asian region is lacking. The present study aimed to characterize the oral and gut microbiota changes, and the impact on both oral and lower gastrointestinal (GI) mucositis, with associated temporal changes in a population of adult recipients of autologous HSCT. Autologous HSCT recipients age ≥18 years were recruited from Hospital Ampang, Malaysia, between April 2019 and December 2020. Mucositis assessments were conducted daily, and blood, saliva, and fecal samples were collected prior to conditioning, on day 0, and at 7 days and 6 months post-transplantation. Longitudinal differences in alpha diversity and beta diversity were determined using the Wilcoxon signed-rank test and permutational multivariate analysis of variance, respectively. Changes in relative abundances of bacteria across time points were assessed using the microbiome multivariate analysis by linear models function. The combined longitudinal effects of clinical, inflammatory, and microbiota variables on mucositis severity were measured using the generalized estimating equation. Among the 96 patients analyzed, oral mucositis and diarrhea (representing lower GI mucositis) occurred in 58.3% and 95.8%, respectively. Alpha and beta diversities were significantly different between sample types (P < .001) and across time points, with alpha diversity reaching statistical significance at day 0 in fecal samples (P < .001) and at day +7 in saliva samples (P < .001). Diversities normalized to baseline by 6 months post-transplantation. Significant microbiota, clinical, and immunologic factors were associated with increasing mucositis grades. Increasing relative abundances of saliva Paludibacter, Leuconostoc, and Proteus were associated with higher oral mucositis grades, whereas increasing relative abundances of fecal Rothia and Parabacteroides were associated with higher GI mucositis grades. Meanwhile, increasing relative abundances of saliva Lactococcus and Acidaminococcus and fecal Bifidobacterium were associated with protective effects against worsening oral and GI mucositis grades, respectively. This study provides real-world evidence and insights into the dysbiosis of the microbiota in patients exposed to conditioning regimen during HSCT. Independent of clinical and immunologic factors, we demonstrated significant associations between relative bacteria abundances with the increasing severity of oral and lower GI mucositis. Our findings offer a potential rationale to consider the inclusion of preventive and restorative measures targeting oral and lower GI dysbiosis as interventional strategies to ameliorate mucositis outcome in HSCT recipients.
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Affiliation(s)
- Shu Ping Wong
- Department of Pharmacy, Ampang Hospital, Ministry of Health, Ampang, Selangor Darul Ehsan, Malaysia
| | - Yi Xian Er
- Department of Parasitology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Sen Mui Tan
- Department of Haematology, Ampang Hospital, Ministry of Health, Ampang, Selangor Darul Ehsan, Malaysia
| | - Soo Ching Lee
- Department of Parasitology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Reena Rajasuriar
- Department of Medicine, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Yvonne Ai Lian Lim
- Department of Parasitology, Faculty of Medicine, Universiti Malaya, Kuala Lumpur, Malaysia.
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Arumugam U, Sudarsanan GB, Karuppannan AK, Palaniappan S. Metagenomic Studies Reveal the Evidence of Akkermansia muciniphila and Other Probiotic Bacteria in the Gut of Healthy and Enterocytozoon hepatopenaei (EHP)-Infected Farmed Penaeus vannamei. Probiotics Antimicrob Proteins 2023:10.1007/s12602-023-10165-4. [PMID: 37749431 DOI: 10.1007/s12602-023-10165-4] [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: 09/14/2023] [Indexed: 09/27/2023]
Abstract
Penaeus vannamei (whiteleg shrimp) is the most widely cultured shrimp globally. Enterocytozoon hepatopenaei (EHP), a microsporidian parasite, infects P. vannamei and causes severe growth retardation, subsequent production, and economic losses in the shrimp culture. The influence of EHP infection in the shrimp gut microbiota is poorly studied, and this would be an interesting area to investigate since the gut microbiome of shrimp influences a number of key host processes such as digestion and immunity. In this study, a metagenomic approach was followed to compare the overall species richness of the gut microbiota of EHP-infected and healthy P. vannamei. Bacterial genomic DNA from the healthy and EHP-infected gut sample were profiled for the bacterial 16S rRNA gene, targeting the V3-V4 conserved region. Operational taxonomic units (OTUs), an approximation of definitive taxonomic identity, were identified based on the sequence similarity within the sample reads and clustered together using a cut-off of 97% identity using UCLUST. The OTUs were then used for the computation of alpha diversity and beta diversity for each sample. EHP-infected gut sample showed lower bacterial abundance throughout the family, class, order, genus, and species levels when compared to healthy gut sample. This study shows that the shrimp gut microbiota is sensitive and exhibits a high level of plasticity during a microsporidian infection like EHP. Furthermore, Akkermansia muciniphila, a novel probiotic bacterium, has been reported in the shrimp gut for the first time.
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Affiliation(s)
- Uma Arumugam
- State Referral Laboratory for Aquatic Animal Health, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Madhavaram Campus, Chennai, 600051, Tamil Nadu, India.
| | - Ganesh Babu Sudarsanan
- State Referral Laboratory for Aquatic Animal Health, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Madhavaram Campus, Chennai, 600051, Tamil Nadu, India
| | - Anbu Kumar Karuppannan
- Bioinformatics Center, Madras Veterinary College, Tamil Nadu Veterinary and Animal Sciences University, Vepery, Chennai, 600007, Tamil Nadu, India
| | - Subash Palaniappan
- State Referral Laboratory for Aquatic Animal Health, Tamil Nadu Dr. J. Jayalalithaa Fisheries University, Madhavaram Campus, Chennai, 600051, Tamil Nadu, India
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Vallejo-García LC, Sánchez-Olmos MDC, Gutiérrez-Ríos RM, López Munguía A. Glycosyltransferases Expression Changes in Leuconostoc mesenteroides subsp. mesenteroides ATCC 8293 Grown on Different Carbon Sources. Foods 2023; 12:foods12091893. [PMID: 37174431 PMCID: PMC10177778 DOI: 10.3390/foods12091893] [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: 04/04/2023] [Revised: 04/26/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023] Open
Abstract
Leuconostoc mesenteroides strains are common contributors in fermented foods producing a wide variety of polysaccharides from sucrose through glycosyltransferases (GTFs). These polymers have been proposed as protective barriers against acidity, dehydration, heat, and oxidative stress. Despite its presence in many traditional fermented products and their association with food functional properties, regulation of GTFs expression in Ln. mesenteroides is still poorly understood. The strain Ln. mesenteroides ATCC 8293 contains three glucansucrases genes not found in operons, and three fructansucrases genes arranged in two operons, levLX and levC-scrB, a Glycoside-hydrolase. We described the first differential gene expression analysis of this strain when cultivated in different carbon sources. We observed that while GTFs are expressed in the presence of most sugars, they are down-regulated in xylose. We ruled out the regulatory effect of CcpA over GTFs and did not find regulatory elements with a direct effect on glucansucrases in the condition assayed. Our findings suggest that only operon levLX is repressed in xylose by LexA and that both fructansucrases operons can be regulated by the VicK/VicR system and PerR. It is essential to further explore the effect of environmental conditions in Ln. mesenteroides bacteria to better understand GTFs regulation and polymer function.
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Affiliation(s)
- Luz Cristina Vallejo-García
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico
| | - María Del Carmen Sánchez-Olmos
- Departamento de Microbiología Molecular, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico
| | - Rosa María Gutiérrez-Ríos
- Departamento de Microbiología Molecular, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico
| | - Agustín López Munguía
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, UNAM, Av. Universidad 2001, Col. Chamilpa, Cuernavaca 62210, Morelos, Mexico
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Raimondi S, Candeliere F, Amaretti A, Costa S, Vertuani S, Spampinato G, Rossi M. Phylogenomic analysis of the genus Leuconostoc. Front Microbiol 2022; 13:897656. [PMID: 35958134 PMCID: PMC9358442 DOI: 10.3389/fmicb.2022.897656] [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: 03/16/2022] [Accepted: 06/28/2022] [Indexed: 11/17/2022] Open
Abstract
Leuconostoc is a genus of saccharolytic heterofermentative lactic acid bacteria that inhabit plant-derived matrices and a variety of fermented foods (dairy products, dough, milk, vegetables, and meats), contributing to desired fermentation processes or playing a role in food spoilage. At present, the genus encompasses 17 recognized species. In total, 216 deposited genome sequences of Leuconostoc were analyzed, to check the delineation of species and to infer their evolutive genealogy utilizing a minimum evolution tree of Average Nucleotide Identity (ANI) and the core genome alignment. Phylogenomic relationships were compared to those obtained from the analysis of 16S rRNA, pheS, and rpoA genes. All the phylograms were subjected to split decomposition analysis and their topologies were compared to check the ambiguities in the inferred phylogenesis. The minimum evolution ANI tree exhibited the most similar topology with the core genome tree, while single gene trees were less adherent and provided a weaker phylogenetic signal. In particular, the 16S rRNA gene failed to resolve several bifurcations and Leuconostoc species. Based on an ANI threshold of 95%, the organization of the genus Leuconostoc could be amended, redefining the boundaries of the species L. inhae, L. falkenbergense, L. gelidum, L. lactis, L. mesenteroides, and L. pseudomesenteroides. Two strains currently recognized as L. mesenteroides were split into a separate lineage representing a putative species (G16), phylogenetically related to both L. mesenteroides (G18) and L. suionicum (G17). Differences among the four subspecies of L. mesenteroides were not pinpointed by ANI or by the conserved genes. The strains of L. pseudomesenteroides were ascribed to two putative species, G13 and G14, the former including also all the strains presently belonging to L. falkenbergense. L. lactis was split into two phylogenetically related lineages, G9 and G10, putatively corresponding to separate species and both including subgroups that may correspond to subspecies. The species L. gelidum and L. gasicomitatum were closely related but separated into different species, the latter including also L. inhae strains. These results, integrating information of ANI, core genome, and housekeeping genes, complemented the taxonomic delineation with solid information on the phylogenetic lineages evolved within the genus Leuconostoc.
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Affiliation(s)
- Stefano Raimondi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Francesco Candeliere
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Alberto Amaretti
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Biogest Siteia, University of Modena and Reggio Emilia, Reggio Emilia, Italy
| | - Stefania Costa
- Department of Chemical, Pharmaceutical and Agricultural Sciences—DOCPAS, University of Ferrara, Ferrara, Italy
| | - Silvia Vertuani
- Department of Life Sciences and Biotechnology, University of Ferrara, Ferrara, Italy
| | - Gloria Spampinato
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | - Maddalena Rossi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
- Biogest Siteia, University of Modena and Reggio Emilia, Reggio Emilia, Italy
- *Correspondence: Maddalena Rossi
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Peralta-García I, González-Muñoz F, Elena RAM, Sánchez-Flores A, López Munguía A. Evolution of Fructans in Aguamiel (Agave Sap) During the Plant Production Lifetime. Front Nutr 2020; 7:566950. [PMID: 33163505 PMCID: PMC7581979 DOI: 10.3389/fnut.2020.566950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Accepted: 08/21/2020] [Indexed: 12/12/2022] Open
Abstract
Aguamiel is the sap collected from agave, while pulque is the result of the natural fermentation of aguamiel. Despite its ancestral origin and numerous publications on pulque production, little is known about the evolution and concentration of sugars and fructo-oligosaccharides in aguamiel, either during its daily accumulation or through the agave production lifetime. In this study, we examined aguamiel composition in three agave plants during their productive lifetime (4 to 9 months). After each collection, the agave pine is scraped to induce aguamiel to flow into an internally created cavity (cajete), producing a residual bagasse (metzal). We found that the concentration of agave fructans and sucrose, as well as the fructan profile, change during the aguamiel production process. During the daily collection, a small amount of agave fructans released from the pine by scraping is drawn into the cajete with the first milliliters of sap where it is then diluted with the inflow of aguamiel. The main component of aguamiel is the sucrose produced in high concentration in the leaves through photosynthesis and then hydrolyzed in the cajete as aguamiel accumulates. We also describe how the fructan profile changes during the accumulation of aguamiel in the cajete. In addition to the varying amount of sucrose that is hydrolyzed in the aguamiel accumulated, we found that fructo-oligosaccharides are either diluted, consumed, or hydrolyzed, depending on the plant and its production stage, thus yielding different fructan profiles. New fructo-oligosaccharides are, in some cases, synthesized by bacteria present in aguamiel. These profiles were also observed in aguamiel collected from ten different plants in the same production region. We also found that a considerable amount of agave fructans is lost in metzal (bagasse), the agave material that is scraped and thrown away twice a day during the production process.
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Affiliation(s)
- Ibeth Peralta-García
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Mexico
| | - Fernando González-Muñoz
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Mexico
| | - Rodríguez-Alegría María Elena
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Mexico
| | - Alejandro Sánchez-Flores
- Unidad de Secuenciación Masiva y Bioinformática, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Agustín López Munguía
- Departamento de Ingeniería Celular y Biocatálisis, Instituto de Biotecnología, Universidad Nacional Autónoma de México (UNAM), Cuernavaca, Mexico
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Poulsen VK, Koza A, Al-Nakeeb K, Oeregaard G. Screening for texturing Leuconostoc and genomics behind polysaccharide production. FEMS Microbiol Lett 2020; 367:5941482. [PMID: 33107908 PMCID: PMC7644082 DOI: 10.1093/femsle/fnaa179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/23/2020] [Indexed: 01/26/2023] Open
Abstract
Synthesis of polysaccharides by Leuconostoc can result in improved texture of fermented products. A total of 249 Leuconostoc strains were screened for homo-polysaccharide production and for texturing capabilities in milk. A total of six Ln. mesenteroides strains with superior texturing properties had the genetic blueprint for both homo- (HoPS) and hetero-polysaccharide (HePS) synthesis. Only one strain produced texture in milk without added sucrose, suggesting HePS synthesis via the Wzy dependent pathway. In milk acidification experiments with added sucrose, all six strains depleted the sucrose and released fructose. Thus, they can be used for both texture and possibly also for sweetness enhancement.
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Affiliation(s)
- Vera Kuzina Poulsen
- Discovery, R&D, Chr. Hansen A/S, 10-12 Boege Allé, DK2970, Hoersholm, Denmark
| | - Anna Koza
- Discovery, R&D, Chr. Hansen A/S, 10-12 Boege Allé, DK2970, Hoersholm, Denmark
| | - Kosai Al-Nakeeb
- Discovery, R&D, Chr. Hansen A/S, 10-12 Boege Allé, DK2970, Hoersholm, Denmark
| | - Gunnar Oeregaard
- Discovery, R&D, Chr. Hansen A/S, 10-12 Boege Allé, DK2970, Hoersholm, Denmark
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Lee S, Kim M. Leuconostoc mesenteroides MKSR isolated from kimchi possesses α-glucosidase inhibitory activity, antioxidant activity, and cholesterol-lowering effects. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108570] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Jang Y, Kim S, Seo S, Li L, Han N. Plasmid curing resulted in improved heterologous gene expression inLeuconostoc citreumEFEL2700. Lett Appl Microbiol 2019; 68:430-436. [DOI: 10.1111/lam.13118] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/11/2019] [Accepted: 01/15/2019] [Indexed: 01/26/2023]
Affiliation(s)
- Y.‐J. Jang
- Brain Korea 21 Center for Bio‐Resource Development Division of Animal, Horticultural, and Food Sciences Chungbuk National University Cheongju Korea
| | - S.‐A. Kim
- Brain Korea 21 Center for Bio‐Resource Development Division of Animal, Horticultural, and Food Sciences Chungbuk National University Cheongju Korea
| | - S.‐O. Seo
- Bio Technology Institute (BTI) University of Minnesota Twin Cities MN USA
| | - L. Li
- Zhejiang Provincial Key Laboratory for Chemistry and Biology Processing Technology of Farm Produces School of Biological and Chemical Engineering Zhejiang University of Science and Technology Hangzhou Zhejiang China
| | - N.S. Han
- Brain Korea 21 Center for Bio‐Resource Development Division of Animal, Horticultural, and Food Sciences Chungbuk National University Cheongju Korea
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Poirier S, Rué O, Coeuret G, Champomier-Vergès MC, Loux V, Chaillou S. Detection of an amplification bias associated to Leuconostocaceae family with a universal primer routinely used for monitoring microbial community structures within food products. BMC Res Notes 2018; 11:802. [PMID: 30409220 PMCID: PMC6225703 DOI: 10.1186/s13104-018-3908-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Accepted: 11/01/2018] [Indexed: 12/20/2022] Open
Abstract
Objectives Sequencing of 16S rDNA V3–V4 region is widely applied for food community profiling. However, two different universal forward primers (named here MUYZER-primer1 and KLINDWORTH-primer2) targeting an identical conservative sequence upstream of the V3 region of 16S rRNA gene, and only distinguished by a single mismatch are both used. This study was carried out to compare whether the accuracy of food microbiota analysis would depend on the choice of one of these two primers. Results Alignment of both primers with common food-borne bacteria 16S sequences revealed that the mismatch between both primers might specifically affect the amplification of Leuconostoc, Oenococcus and Fructobacillus species but not Weissella species. Food products containing either Leuconostoc and/or Weissella were selected for a detection test. As expected from our in silico analysis, our study showed that this mismatch induced a strong biased amplification specifically associated to the OTUs belonging to the genus Leuconostoc but not to the genus Weissella. In presence of Muyzer-primer1, none of the sequences expected for Leuconostoc genus was detected whereas those sequences were correctly amplified with Klindworth-primer2. Since Leuconostoc is an important genus in food, agro-environments and in digestive tract of animals, we recommend that Muyzer-primer1 should thus be abandoned for the bacterial characterization of their associated microbiota.
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Affiliation(s)
- Simon Poirier
- MICALIS, INRA AgroParisTech, Université Paris-Saclay, Domaine de Vilvert, 78350, Jouy-en-Josas, France
| | - Olivier Rué
- MaIAGE, INRA, Université Paris-Saclay, Domaine de Vilvert, 78350, Jouy-en-Josas, France
| | - Gwendoline Coeuret
- MICALIS, INRA AgroParisTech, Université Paris-Saclay, Domaine de Vilvert, 78350, Jouy-en-Josas, France
| | | | - Valentin Loux
- MaIAGE, INRA, Université Paris-Saclay, Domaine de Vilvert, 78350, Jouy-en-Josas, France
| | - Stéphane Chaillou
- MICALIS, INRA AgroParisTech, Université Paris-Saclay, Domaine de Vilvert, 78350, Jouy-en-Josas, France.
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11
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Koduru L, Kim Y, Bang J, Lakshmanan M, Han NS, Lee DY. Genome-scale modeling and transcriptome analysis of Leuconostoc mesenteroides unravel the redox governed metabolic states in obligate heterofermentative lactic acid bacteria. Sci Rep 2017; 7:15721. [PMID: 29147021 PMCID: PMC5691038 DOI: 10.1038/s41598-017-16026-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 11/06/2017] [Indexed: 11/09/2022] Open
Abstract
Obligate heterofermentative lactic acid bacteria (LAB) are well-known for their beneficial health effects in humans. To delineate the incompletely characterized metabolism that currently limits their exploitation, at systems-level, we developed a genome-scale metabolic model of the representative obligate heterofermenting LAB, Leuconostoc mesenteroides (iLME620). Constraint-based flux analysis was then used to simulate several qualitative and quantitative phenotypes of L. mesenteroides, thereby evaluating the model validity. With established predictive capabilities, we subsequently employed iLME620 to elucidate unique metabolic characteristics of L. mesenteroides, such as the limited ability to utilize amino acids as energy source, and to substantiate the role of malolactic fermentation (MLF) in the reduction of pH-homeostatic burden on F0F1-ATPase. We also reported new hypothesis on the MLF mechanism that could be explained via a substrate channelling-like phenomenon mainly influenced by intracellular redox state rather than the intermediary reactions. Model simulations further revealed possible proton-symporter dependent activity of the energy efficient glucose-phosphotransferase system in obligate heterofermentative LAB. Moreover, integrated transcriptomic analysis allowed us to hypothesize transcriptional regulatory bias affecting the intracellular redox state. The insights gained here about the low ATP-yielding metabolism of L. mesenteroides, dominantly controlled by the cellular redox state, could potentially aid strain design for probiotic and cell factory applications.
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Affiliation(s)
- Lokanand Koduru
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117576, Singapore
| | - Yujin Kim
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Jeongsu Bang
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea
| | - Meiyappan Lakshmanan
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01, Centros, Singapore, 138668, Singapore
| | - Nam Soo Han
- Brain Korea 21 Center for Bio-Resource Development, Division of Animal, Horticultural, and Food Sciences, Chungbuk National University, Cheongju, Chungbuk, 28644, Republic of Korea.
| | - Dong-Yup Lee
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117576, Singapore.
- Bioprocessing Technology Institute, Agency for Science, Technology and Research (A*STAR), 20 Biopolis Way, #06-01, Centros, Singapore, 138668, Singapore.
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