title: Di-D-fructose dianhydride-enriched caramels: effect on colon microbiota, inflammation, and tissue damage in trinitrobenzenesulfonic acid-induced colitic rats.
abstract: In the present study we describe the preparation and chemical characterization of a caramel with a high (70%) content of difructose dianhydrides (DFAs) and glycosylated derivatives (DFAs). This product was obtained by thermal activation (90 degrees C) of highly concentrated (90% w/v) aqueous D-fructose solutions using the sulfonic acid ion-exchange resin Lewatit S2328 as caramelization catalyst. DFAs represent a unique family of cyclic fructans with prebiotic properties already present in low proportions (<15%) in commercial caramel. We report the antiinflammatory activity of the new DFA-enriched caramel in the trinitrobenzenesulfonic acid (TNBS) model of rat colitis, an experimental model that resembles human inflammatory bowel disease (IBD), and compare its effects with those obtained with a commercial sucrose caramel and with linear fructooligosaccharides (FOS). For this purpose, the effects on colon tissue damage, gut microbiota, short-chain fatty acid (SCFAs) production, and different inflammatory markers were evaluated. The administration of DFA-enriched caramel to colitic rats showed intestinal antiinflammatory effect, as evidenced macroscopically by a significant reduction in the extent of the colonic damage induced by TNBS. This effect was similar to that obtained with FOS in the same experimental settings, whereas commercial caramel was devoid of any significant antiinflammatory effect. The beneficial effect was associated with the inhibition of the colonic levels of the proinflammatory cytokines, tumor necrosis factor alpha (TNF alpha) and interleukin 1beta (IL-1beta), and the reduction in colonic myeloperoxidase (MPO) activity and inducible nitric oxide synthase (iNOS) expression. The DFA-enriched caramel also promoted a more favorable intestinal microbiota, increasing lactobacilli and bifidobacteria counts as well as inducing higher concentrations of SCFAs in the luminal colonic contents. These results reinforce the concept of DFAs and glycosyl-DFAs as dietary beneficial compounds with prebiotic properties and suggest that the novel DFA-enriched caramel here reported may be an interesting candidate to be explored for the dietary treatment of human IBD.
authors.affiliation: Department of Pharmacology, Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Center for Biomedical Research CIBM, University of Granada, E-18100 Armilla, Granada, Spain.
authors.forename: Belén
authors.initials: B
authors.lastname: Arribas
authors.forename: Elena
authors.initials: E
authors.lastname: Suárez-Pereira
authors.forename: Carmen
authors.initials: C
authors.lastname: Ortiz Mellet
authors.forename: José M
authors.initials: JM
authors.lastname: García Fernández
authors.forename: Christoph
authors.initials: C
authors.lastname: Buttersack
authors.forename: Maria Elena
authors.initials: ME
authors.lastname: Rodríguez-Cabezas
authors.forename: Natividad
authors.initials: N
authors.lastname: Garrido-Mesa
authors.forename: Elvira
authors.initials: E
authors.lastname: Bailon
authors.forename: Eduardo
authors.initials: E
authors.lastname: Guerra-Hernández
authors.forename: Antonio
authors.initials: A
authors.lastname: Zarzuelo
authors.forename: Julio
authors.initials: J
authors.lastname: Gálvez
mesh_terms: D000818:Animals; D000893:Anti-Inflammatory Agents / Q000008:administration & dosage*; D002182:Candy / Q000032:analysis; D003092:Colitis / Q000139:chemically induced / Q000188:drug therapy*; D003106:Colon / Q000382:microbiology*; D004187:Disaccharides / Q000008:administration & dosage* / Q000032:analysis; D004195:Disease Models, Animal; D005260:Female; D005511:Food Handling / Q000379:methods; D005527:Food, Fortified; D006031:Glycosylation; D006358:Hot Temperature; D009844:Oligosaccharides / Q000008:administration & dosage; D056692:Prebiotics; D051381:Rats; D017208:Rats, Wistar; D013237:Stereoisomerism; D013395:Sucrose / Q000008:administration & dosage; D014302:Trinitrobenzenesulfonic Acid
chemical_list: D000893:Anti-Inflammatory Agents; D004187:Disaccharides; D009844:Oligosaccharides; D056692:Prebiotics; C116580:fructooligosaccharide; C036365:difructose anhydride I; D013395:Sucrose; D014302:Trinitrobenzenesulfonic Acid