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disaccharide/carie dentaire
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Involvement of phosphoenolpyruvate in the catabolism of caries-conducive disaccharides by Streptococcus mutans: lactose transport.
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The mechanisms for transport and hydrolysis of lactose were investigated in five cariogenic strains (HS6, AHT, FA1, NCTC 10449, and SL1) representing the four serogenetic groups of Streptococcus mutans. The systems for transport and hydrolysis of lactose had the characteristics of a
Influence of dietary disaccharides on mouth microorganisms and experimental dental caries in rats.
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Osborne-Mendel rats were inoculated with Streptococcus mutans at weaning, divided into 5 groups and fed cariogenic diets containing 56 per cent sugar either as sucrose, maltose, lactose or combinations of sucrose/maltose and sucrose/lactose. The number of Strep. mutans on molar teeth of rats fed the
Non-cariogenicity of the disaccharide palatinose in experimental dental caries of rats.
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The caries-inducing activity of palatinose (isomaltulose, alpha-D-glucopyranosyl-1,6-fructose) was examined in in vitro and in vivo experiments, comparing it with other carbohydrates. When Streptococcus mutans was successively subcultured in a broth medium containing 1% palatinose, the strains
On the cleavage of starch and disaccharides in the human oral cavity.
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[The cleavage of starch and disaccharides in the human oral cavity].
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Relative importance of polysaccharides, disaccharides and monosaccharides in the production of caries.
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The effect of diets contaning different mono- and disaccharides on the incidence of dental caries in the albino rat.
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Differential contributions of recognition factors of two plant lectins -Amaranthus caudatus lectin and Arachis hypogea agglutinin, reacting with Thomsen-Friedenreich disaccharide (Galbeta1-3GalNAcalpha1-Ser/Thr).
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Previous reports on the carbohydrate specificities of Amaranthus caudatus lectin (ACL) and peanut agglutinin (PNA, Arachis hypogea) indicated that they share the same specificity for the Thomsen-Friedenreich (T(alpha), Galbeta1-3GalNAcalpha1-Ser/Thr) glycotope, but differ in monosaccharide
Crystal structures of β-primeverosidase in complex with disaccharide amidine inhibitors.
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β-Primeverosidase (PD) is a disaccharide-specific β-glycosidase in tea leaves. This enzyme is involved in aroma formation during the manufacturing process of oolong tea and black tea. PD hydrolyzes β-primeveroside (6-O-β-d-xylopyranosyl-β-d-glucopyranoside) at the β-glycosidic bond of primeverose to
Selective disaccharide binding by a macrotetracyclic receptor.
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A new carbohydrate receptor possesses a C3-symmetric polar cavity capable of encapsulating disaccharides; binding to beta-maltosyl is preferred, complementing previous systems which have favoured "all-equatorial" substrates.
Investigation of disaccharide recognition by molecularly imprinted polymers.
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The selectivity of carbohydrate-imprinted polymers for several disaccharides, namely cellobiose, maltose, lactose and gentiobiose, is investigated. An ternary ligand-Cu(II)-carbohydrate complex was formed in alkaline solution and captured afterwards in the polymer. The accessibility of the polymer
Fermentable simple sugars in self-administered medications as aetiologic agents in rampant caries. Case report.
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Sucrose is recognized as the most cariogenic carbohydrate. However, other simple sugars may act as substrates for cariogenic micro-organisms. The clinical features of an adult patient suffering from rampant caries are described. It was considered that the predominant aetiologic factor was prolonged
Structure-function analysis of MurJ reveals a solvent-exposed cavity containing residues essential for peptidoglycan biogenesis in Escherichia coli.
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Gram-negative bacteria such as Escherichia coli build a peptidoglycan (PG) cell wall in their periplasm using the precursor known as lipid II. Lipid II is a large amphipathic molecule composed of undecaprenyl diphosphate and a disaccharide-pentapeptide that PG-synthesizing enzymes use to build the
Streptococcus downii sp. nov., isolated from the oral cavity of a teenager with Down syndrome
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A new α-haemolytic streptococcal strain has been isolated from the dental plaque of a teenager with Down syndrome. Genetic and taxonomic analyses place this Streptococcus within the oralis group. It is a Gram-stain-positive, non-motile, non-spore-forming spherical alpha-haemolytic coccus
Selective Encapsulation of Disaccharide Xylobiose by an Aromatic Foldamer Helical Capsule.
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Xylobiose sequestration in a helical aromatic oligoamide capsule was evidenced by circular dichroism, NMR spectroscopy, and crystallography. The preparation of the 5 kDa oligoamide sequence was made possible by the transient use of acid-labile dimethoxybenzyl tertiary amide substituents that disrupt
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