1
|
Dudonné S, Varin TV, Forato Anhê F, Dubé P, Roy D, Pilon G, Marette A, Levy É, Jacquot C, Urdaci M, Desjardins Y. Modulatory effects of a cranberry extract co-supplementation with Bacillus subtilis CU1 probiotic on phenolic compounds bioavailability and gut microbiota composition in high-fat diet-fed mice. PHARMANUTRITION 2015. [DOI: 10.1016/j.phanu.2015.04.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
2
|
Leivers S, Hidalgo-Cantabrana C, Robinson G, Margolles A, Ruas-Madiedo P, Laws AP. Structure of the high molecular weight exopolysaccharide produced by Bifidobacterium animalis subsp. lactis IPLA-R1 and sequence analysis of its putative eps cluster. Carbohydr Res 2011; 346:2710-7. [DOI: 10.1016/j.carres.2011.09.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Revised: 09/13/2011] [Accepted: 09/15/2011] [Indexed: 10/17/2022]
|
3
|
Quantification of Propionibacterium acidipropionici P169 bacteria in environmental samples by use of strain-specific primers derived by suppressive subtractive hybridization. Appl Environ Microbiol 2011; 77:3898-902. [PMID: 21460112 DOI: 10.1128/aem.02586-10] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A quantitative PCR (qPCR) assay targeting a gene identified by suppressive subtractive hybridization (SSH) was developed to detect Propionibacterium acidipropionici P169, with a threshold of 10(4) CFU/U of dairy feed or rumen fluid. The report is the first using a molecular marker generated by SSH to quantify a bacterial strain in environmental samples.
Collapse
|
4
|
Ndoye B, Lessard MH, LaPointe G, Roy D. Exploring suppression subtractive hybridization (SSH) for discriminating Lactococcus lactis ssp. cremoris SK11 and ATCC 19257 in mixed culture based on the expression of strain-specific genes. J Appl Microbiol 2010; 110:499-512. [DOI: 10.1111/j.1365-2672.2010.04902.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
5
|
Audy J, Labrie S, Roy D, LaPointe G. Sugar source modulates exopolysaccharide biosynthesis in Bifidobacterium longum subsp. longum CRC 002. Microbiology (Reading) 2010; 156:653-664. [DOI: 10.1099/mic.0.033720-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The effect of four sugars (glucose, galactose, lactose and fructose) on exopolysaccharide (EPS) production by Bifidobacterium longum subsp. longum CRC 002 was evaluated. More EPS was produced when CRC 002 was grown on lactose in the absence of pH control, with a production of 1080±120 mg EPS l−1 (P<0.01) after 24 h of incubation. For fructose, galactose and glucose, EPS production was similar, at 512±63, 564±165 and 616±93 mg EPS l−1, respectively. The proposed repeating unit composition of the EPS is 2 galactose to 3 glucose. The effect of sugar and fermentation time on expression of genes involved in sugar nucleotide production (galK, galE1, galE2, galT1, galT2, galU, rmlA, rmlB1 and rmlCD) and the priming glycosyltransferase (wblE) was quantified using real-time reverse transcription PCR. A significantly higher transcription level of wblE (9.29-fold) and the genes involved in the Leloir pathway (galK, 4.10-fold; galT1, 2.78-fold; and galE2, 4.95-fold) during exponential growth was associated with enhanced EPS production on lactose compared to glucose. However, galU expression, linking glucose metabolism with the Leloir pathway, was not correlated with EPS production on different sugars. Genes coding for dTDP-rhamnose biosynthesis were also differentially expressed depending on sugar source and growth phase, although rhamnose was not present in the composition of the EPS. This precursor may be used in cell wall polysaccharide biosynthesis. These results contribute to understanding the changes in gene expression when different sugar substrates are catabolized by B. longum subsp. longum CRC 002.
Collapse
Affiliation(s)
- Julie Audy
- Institute for Nutraceuticals and Functional Foods, Université Laval, 2440 Boul. Hochelaga, Québec, QC G1V 0A6, Canada
| | - Steve Labrie
- Institute for Nutraceuticals and Functional Foods, Université Laval, 2440 Boul. Hochelaga, Québec, QC G1V 0A6, Canada
| | - Denis Roy
- Institute for Nutraceuticals and Functional Foods, Université Laval, 2440 Boul. Hochelaga, Québec, QC G1V 0A6, Canada
| | - Gisèle LaPointe
- Institute for Nutraceuticals and Functional Foods, Université Laval, 2440 Boul. Hochelaga, Québec, QC G1V 0A6, Canada
| |
Collapse
|