Described Roseburia cells are straight or slightly curved rods. Many strains are motile by means of multiple flagella. The Gram-stain reaction has been reported as positive, negative, or variable among cultured strains, despite the phylogenetic placement of the genus within the phylum Bacillota.
Species differ in their capacity to use dietary carbohydrates. Comparative genomic analysis has identified differences in carbohydrate-active enzymes and biosynthetic pathways among species, which may contribute to their occupation of different ecological niches in the colon. Roseburia intestinalis, for example, can act as a primary degrader of dietary β-mannans, while Roseburia inulinivorans can use inulin.
During carbohydrate fermentation, some strains consume acetate while producing butyrate. Butyrate is used as an energy source by colonic epithelial cells and participates in metabolic and immune signalling in the intestine.
R. intestinalis has been investigated as a potential live biotherapeutic. Administration of the bacterium reduced inflammatory pathology and altered immune responses in experimental models of colitis, but these findings were obtained in preclinical systems.
The relative abundance of R. inulinivorans was positively associated with several measures of muscle strength in human cohorts. Oral supplementation with the species also increased forelimb grip strength in antibiotic-treated mice and was accompanied by changes in amino-acid availability, muscle metabolism, and muscle-fibre composition.
1234Duncan, Sylvia H.; Aminov, Rustam I.; Scott, Karen P.; Louis, Petra; Stanton, Thaddeus B.; Flint, Harry J. (2006). "Proposal of Roseburia faecis sp. nov., Roseburia hominis sp. nov. and Roseburia inulinivorans sp. nov., based on isolates from human faeces". International Journal of Systematic and Evolutionary Microbiology. 56 (10): 2437–2441. doi:10.1099/ijs.0.64098-0. PMID17012576.
123Duncan, Sylvia H.; Hold, Gillian L.; Barcenilla, Ana; Stewart, Colin S.; Flint, Harry J. (2002). "Roseburia intestinalis sp. nov., a novel saccharolytic, butyrate-producing bacterium from human faeces". International Journal of Systematic and Evolutionary Microbiology. 52 (5): 1615. doi:10.1099/ijs.0.02143-0. PMID12361264.
↑Stanton, Thaddeus B.; Savage, Dwayne C. (1983). "Roseburia cecicola gen. nov., sp. nov., a motile, obligately anaerobic bacterium from a mouse cecum". International Journal of Systematic Bacteriology. 33 (3): 618–627. doi:10.1099/00207713-33-3-618.
↑Louis, Petra; Flint, Harry J. (2017). "Formation of propionate and butyrate by the human colonic microbiota". Environmental Microbiology. 19 (1): 29–41. doi:10.1111/1462-2920.13589. hdl:2164/9751. PMID27235414.