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Senizza A, Callegari ML, Senizza B, Minuti A, Rocchetti G, Morelli L, Patrone V. Effects of Linoleic Acid on Gut-Derived Bifidobacterium breve DSM 20213: A Transcriptomic Approach. Microorganisms 2019; 7:microorganisms7120710. [PMID: 31861103 PMCID: PMC6955684 DOI: 10.3390/microorganisms7120710] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 11/12/2019] [Accepted: 12/16/2019] [Indexed: 02/08/2023] Open
Abstract
Bacterial production of conjugated linoleic acid (CLA) has recently received great attention because of the potential health benefits of this fatty acid. Linoleic acid (LA) can be converted to CLA by several microorganisms, including bifidobacteria, possibly as a detoxification mechanism to avoid the growth inhibition effect of LA. In the present in vitro study, we investigated the gene expression landscape of the intestinal strain Bifidobacterium breve DSM 20213 when exposed to LA. Transcriptomic analysis using RNA-seq revealed that LA induced a multifactorial stress response in the test strain, including upregulation of genes involved in iron uptake and downregulation of genes involved in sugar and oligopeptide transport. We also observed reduced transcription of genes involved in membrane and pili biosynthesis. The upregulation of iron uptake was not related to any putative ability of LA to chelate Fe2+, but was somewhat linked to stress response. Furthermore, we demonstrated that LA increased reactive oxygen species (ROS) production in bacterial cells, activating an oxidative stress response. This response was proved by thioredoxin reductase transcription, and was primarily evident among bacteria cultured in the absence of cysteine. This is the first report of the potential mechanisms involved in bacterial LA transport and stress response in B. breve.
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Affiliation(s)
- Alice Senizza
- Department for Sustainable Food Process (DiSTAS), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy; (A.S.); (M.L.C.); (B.S.); (G.R.); (L.M.)
| | - Maria Luisa Callegari
- Department for Sustainable Food Process (DiSTAS), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy; (A.S.); (M.L.C.); (B.S.); (G.R.); (L.M.)
- Biotechnology Research Centre (CRB), via Milano 24, 26100 Cremona, Italy
| | - Biancamaria Senizza
- Department for Sustainable Food Process (DiSTAS), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy; (A.S.); (M.L.C.); (B.S.); (G.R.); (L.M.)
| | - Andrea Minuti
- Department of Animal Science, Food and Nutrition (DiANA), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy;
- Nutrigenomics and Proteomics Research Center (PRONUTRIGEN), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy
| | - Gabriele Rocchetti
- Department for Sustainable Food Process (DiSTAS), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy; (A.S.); (M.L.C.); (B.S.); (G.R.); (L.M.)
| | - Lorenzo Morelli
- Department for Sustainable Food Process (DiSTAS), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy; (A.S.); (M.L.C.); (B.S.); (G.R.); (L.M.)
- Biotechnology Research Centre (CRB), via Milano 24, 26100 Cremona, Italy
| | - Vania Patrone
- Department for Sustainable Food Process (DiSTAS), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy; (A.S.); (M.L.C.); (B.S.); (G.R.); (L.M.)
- Nutrigenomics and Proteomics Research Center (PRONUTRIGEN), Università Cattolica del Sacro Cuore, via Emilia Parmense 84, 29122 Piacenza, Italy
- Correspondence: ; Tel.: +39-0523-599247
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Mora D, Filardi R, Arioli S, Boeren S, Aalvink S, de Vos WM. Development of omics-based protocols for the microbiological characterization of multi-strain formulations marketed as probiotics: the case of VSL#3. Microb Biotechnol 2019; 12:1371-1386. [PMID: 31402586 PMCID: PMC6801179 DOI: 10.1111/1751-7915.13476] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 07/30/2019] [Accepted: 07/31/2019] [Indexed: 12/17/2022] Open
Abstract
The growing commercial interest in multi-strain formulations marketed as probiotics has not been accompanied by an equal increase in the evaluation of quality levels of these biotechnological products. The multi-strain product VSL#3 was used as a model to setup a microbiological characterization that could be extended to other formulations with high complexity. Shotgun metagenomics by deep Illumina sequencing was applied to DNA isolated from the commercial VSL#3 product to confirm strains identity safety and composition. Single-cell analysis was used to evaluate the cell viability, and β-galactosidase and urease activity have been used as marker to monitor the reproducibility of the production process. Similarly, these lots were characterized in detail by a metaproteomics approach for which a robust protein extraction protocol was combined with advanced mass spectrometry. The results identified over 1600 protein groups belonging to all strains present in the VSL#3 formulation. Of interest, only 3.2 % proteins showed significant differences mainly related to small variations in strain abundance. The protocols developed in this study addressed several quality criteria that are relevant for marketed multi-strain products and these represent the first efforts to define the quality of complex probiotic formulations such as VSL#3.
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Affiliation(s)
- Diego Mora
- Department of Food Environmental and Nutritional Sciences (DeFENS)University of MilanMilanItaly
| | - Rossella Filardi
- Department of Food Environmental and Nutritional Sciences (DeFENS)University of MilanMilanItaly
| | - Stefania Arioli
- Department of Food Environmental and Nutritional Sciences (DeFENS)University of MilanMilanItaly
| | - Sjef Boeren
- Laboratory of BiochemistryWageningen UniversityWageningenThe Netherlands
| | - Steven Aalvink
- Laboratory of MicrobiologyWageningen UniversityWageningenThe Netherlands
| | - Willem M. de Vos
- Laboratory of MicrobiologyWageningen UniversityWageningenThe Netherlands
- Human Microbiome Research Program Unit, Faculty of MedicineUniversity of HelsinkiHelsinkiFinland
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