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Didier Raoult - One of the best experts on this subject based on the ideXlab platform.
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negativibacillus massiliensis gen nov sp nov a new bacterial genus isolated from a human left colon sample
Microbiological Research, 2021Co-Authors: Camille Valles, Jean Christophe Lagier, M Mailhe, D Ricaboni, Nicholas Armstrong, Stephane Alibar, Veronique Vitton, Didier Raoult, Maryam Tidjani AlouAbstract:A new genus, a member of the Ruminococcaceae family, was isolated from the left colon of a healthy woman. Strain Marseille P3213 was a non-motile, spore-forming, Gram-stain negative, rod-shaped bacterium. This strictly anaerobic species reached optimal growth after an incubation of 72 h at 37 °C. The 16S rRNA gene sequence of this strain shared a 93.52% similarity level with Harryflintia acetispora strain V20-281a, its closest phylogenetic neighbor with standing in the nomenclature. Its genome had a size of 2.87 Mb, with a 45.81% G + C content. We hereby propose the creation of Negativibacillus massiliensis strain P3213T as the 43rd genus within the Ruminococcaceae family.
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Fournierella massiliensis gen. nov., sp nov., a new human-associated member of the family Ruminococcaceae
International Journal of Systematic and Evolutionary Microbiology, 2017Co-Authors: Amadou Hamidou Togo, Nicholas Armstrong, Guillaume Durand, Saber Khelaifia, Catherine Robert, Frederic Cadoret, Fabrizio Di Pinto, Jeremy Delerce, Anthony Levasseur, Didier RaoultAbstract:An anaerobic bacterium, strain AT2(T), was isolated from the fresh stool sample of a healthy French man using the culturomics approach. The 16S rRNA gene sequence analysis showed that strain AT2(T) had 95.2% nucleotide sequence similarity with Gemmiger formicilis ATCC 27749(T), the phylogenetically closest species with standing in nomenclature. Cells are Gram-stain-negative, catalase- and oxidase-negative, obligately anaerobic, non-motile, non-spore-forming, rod-shaped, and the bacilli were mesothermophilic. The major fatty acids were C-16 : 0 (43.8 %) and C-18 : 1n9 (20 %). The DNA G+C content of the strain based on its genome sequence was 56.8 mol%. Based on the phenotypic, biochemical and phylogenetic analysis, we propose the creation of the genus Fournierella gen. nov., which contains strain AT2(T) (=CSUR P2014(T)=DSM 100451(T)) as the type strain of the type species Fournierella massiliensis gen. nov., sp. nov.
Nicholas Armstrong - One of the best experts on this subject based on the ideXlab platform.
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negativibacillus massiliensis gen nov sp nov a new bacterial genus isolated from a human left colon sample
Microbiological Research, 2021Co-Authors: Camille Valles, Jean Christophe Lagier, M Mailhe, D Ricaboni, Nicholas Armstrong, Stephane Alibar, Veronique Vitton, Didier Raoult, Maryam Tidjani AlouAbstract:A new genus, a member of the Ruminococcaceae family, was isolated from the left colon of a healthy woman. Strain Marseille P3213 was a non-motile, spore-forming, Gram-stain negative, rod-shaped bacterium. This strictly anaerobic species reached optimal growth after an incubation of 72 h at 37 °C. The 16S rRNA gene sequence of this strain shared a 93.52% similarity level with Harryflintia acetispora strain V20-281a, its closest phylogenetic neighbor with standing in the nomenclature. Its genome had a size of 2.87 Mb, with a 45.81% G + C content. We hereby propose the creation of Negativibacillus massiliensis strain P3213T as the 43rd genus within the Ruminococcaceae family.
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Fournierella massiliensis gen. nov., sp nov., a new human-associated member of the family Ruminococcaceae
International Journal of Systematic and Evolutionary Microbiology, 2017Co-Authors: Amadou Hamidou Togo, Nicholas Armstrong, Guillaume Durand, Saber Khelaifia, Catherine Robert, Frederic Cadoret, Fabrizio Di Pinto, Jeremy Delerce, Anthony Levasseur, Didier RaoultAbstract:An anaerobic bacterium, strain AT2(T), was isolated from the fresh stool sample of a healthy French man using the culturomics approach. The 16S rRNA gene sequence analysis showed that strain AT2(T) had 95.2% nucleotide sequence similarity with Gemmiger formicilis ATCC 27749(T), the phylogenetically closest species with standing in nomenclature. Cells are Gram-stain-negative, catalase- and oxidase-negative, obligately anaerobic, non-motile, non-spore-forming, rod-shaped, and the bacilli were mesothermophilic. The major fatty acids were C-16 : 0 (43.8 %) and C-18 : 1n9 (20 %). The DNA G+C content of the strain based on its genome sequence was 56.8 mol%. Based on the phenotypic, biochemical and phylogenetic analysis, we propose the creation of the genus Fournierella gen. nov., which contains strain AT2(T) (=CSUR P2014(T)=DSM 100451(T)) as the type strain of the type species Fournierella massiliensis gen. nov., sp. nov.
Fredrik Backhed - One of the best experts on this subject based on the ideXlab platform.
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effects of a vegetarian diet on cardiometabolic risk factors gut microbiota and plasma metabolome in subjects with ischemic heart disease a randomized crossover study
Journal of the American Heart Association, 2020Co-Authors: Demir Djekic, Lin Shi, Harald Brolin, Frida Carlsson, Charlotte Sarnqvist, Otto Savolainen, Yang Cao, Fredrik BackhedAbstract:Background A vegetarian diet (VD) may reduce future cardiovascular risk in patients with ischemic heart disease. Methods and Results A randomized crossover study was conducted in subjects with ischemic heart disease, assigned to 4-week intervention periods of isocaloric VD and meat diet (MD) with individually designed diet plans, separated by a 4-week washout period. The primary outcome was difference in oxidized low-density lipoprotein cholesterol (LDL-C) between diets. Secondary outcomes were differences in cardiometabolic risk factors, quality of life, gut microbiota, fecal short-chain and branched-chain fatty acids, and plasma metabolome. Of 150 eligible patients, 31 (21%) agreed to participate, and 27 (87%) participants completed the study. Mean oxidized LDL-C (-2.73 U/L), total cholesterol (-5.03 mg/dL), LDL-C (-3.87 mg/dL), and body weight (-0.67 kg) were significantly lower with the VD than with the MD. Differences between VD and MD were observed in the relative abundance of several microbe genera within the families Ruminococcaceae, Lachnospiraceae, and Akkermansiaceae. Plasma metabolites, including l-carnitine, acylcarnitine metabolites, and phospholipids, differed in subjects consuming VD and MD. The effect on oxidized LDL-C in response to the VD was associated with a baseline gut microbiota composition dominated by several genera of Ruminococcaceae. Conclusions The VD in conjunction with optimal medical therapy reduced levels of oxidized LDL-C, improved cardiometabolic risk factors, and altered the relative abundance of gut microbes and plasma metabolites in patients with ischemic heart disease. Our results suggest that composition of the gut microbiota at baseline may be related to the reduction of oxidized LDL-C observed with the VD. Registration URL: https://www.clinicaltrials.gov; Unique identifier: NCT02942628.
Yan Zhou - One of the best experts on this subject based on the ideXlab platform.
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production of high concentration n caproic acid from lactate through fermentation using a newly isolated Ruminococcaceae bacterium cpb6
Biotechnology for Biofuels, 2017Co-Authors: Yi Wang, Yan Zhou, Tingting Wu, Xiangzhen Li, Daping LiAbstract:n-Caproic acid (CA), as a medium-chain carboxylic acid, is a valuable chemical feedstock for various industrial applications. The fermentative production of CA from renewable carbon sources has attracted a lot of attentions. Lactate is a significant intermediate waste in the anaerobic breakdown of carbohydrates that comprise 18–70% of the chemical oxygen demand (COD) in municipal and some industrial wastewaters. Recently, researchers (including our own group) reported the CA production using lactate as electron donor with newly identified microbiome systems. However, within such processes, it was hard to determine whether the CA production was completed by a single strain or by the co-metabolism of different microorganisms. Here, we report the CA production using lactate as electron donor using the strain CPB6, which we isolated from a microbiome for CA production as described previously. Strain CPB6 is affiliated with Clostridium cluster IV of the family of Ruminococcaceae based on 16S rRNA gene sequence analysis. The strain prefers acidic initial pH condition (pH 5.0–6.5), and the temperature ranging from 30 to 40 °C for CA production. In a fed-batch fermentation with non-sterilized lactate-containing organic wastewater as feedstock, strain CPB6 produced 16.6 g/L CA (from 45.1 g/L lactate) with a maximum productivity of 5.29 g/L/day. Enzyme assays with crude cell extract showed that CPB6 can metabolize acetate and butyryl-CoA to produce n-butyric acid, and acetate/n-butyrate and caproyl-CoA to produce CA, respectively. This study demonstrated that high concentration of CA production can be obtained by a newly isolated pure culture CPB6. This strain can be employed as a powerful workhorse for high-efficient CA recovery from lactate-containing waste streams. Our preliminary investigation suggested that the CA production from lactate in strain CPB6 might be via the chain elongation pathway of the reverse β-oxidation; the detailed mechanism, however, warrants further investigation using various molecular microbiology techniques.
B A Efimov - One of the best experts on this subject based on the ideXlab platform.
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ruthenibacterium lactatiformans gen nov sp nov an anaerobic lactate producing member of the family Ruminococcaceae isolated from human faeces
International Journal of Systematic and Evolutionary Microbiology, 2016Co-Authors: A N Shkoporov, Andrei V Chaplin, Victoria A Shcherbakova, Natalia E Suzina, L I Kafarskaia, V K Bozhenko, B A EfimovAbstract:Two novel strains of Gram-stain-negative, rod-shaped, obligately anaerobic, non-spore-forming, non-motile bacteria were isolated from the faeces of healthy human subjects. The strains, designated as 585-1T and 668, were characterized by mesophilic fermentative metabolism, production of d-lactic acid, succinic acid and acetic acid as end products of d-glucose fermentation, prevalence of C18 : 1 ω9, C18 : 1 ω9 aldehyde, C16 : 0 and C16 : 1 ω7c fatty acids, presence of glycine, glutamic acid, lysine, alanine and aspartic acid in the petidoglycan peptide moiety and lack of respiratory quinones. Whole genome sequencing revealed the DNA G+C content was 56.4–56.6 mol%. The complete 16S rRNA gene sequences of the two strains shared 91.7/91.6 % similarity with Anaerofilum pentosovorans FaeT, 91.3/91.2 % with Gemmiger formicilis ATCC 27749T and 88.9/88.8 % with Faecalibacterium prausnitzii ATCC 27768T. On the basis of chemotaxonomic and genomic properties it was concluded that the strains represent a novel species in a new genus within the family Ruminococcaceae , for which the name Ruthenibacterium lactatiformans gen. nov., sp. nov. is proposed. The type strain of Ruthenibacterium lactatiformans is 585-1T (=DSM 100348T=VKM B-2901T).
