title: Interaction of Lactobacillus fermentum BGHI14 with rat colonic mucosa: implications for colitis induction.
abstract: The present study was carried out to test the colonic mucosal response of rats to oral supplementation with Lactobacillus fermentum BGHI14 and to correlate the tissue reaction to trinitrobenzenesulfonate (TNBS)-induced colitis with mucosal barrier alterations caused by bacterial ingestion. An immune cell-mediated reaction of healthy colonic tissue was noticed after bacterial feeding. After prolonged bacterial treatment, the observed reaction had retreated to normality, but the mRNA levels of proinflammatory cytokines interleukin-1β (IL-1β) and tumor necrosis factor alpha (TNF-α) remained elevated. These data point to the chronic low-grade inflammation that could be caused by long-term probiotic consumption. Although no detrimental effects of bacterial pretreatment were noticed in colitic rats, at least in the acute state of disease, the results obtained in our study point to the necessity of reassessment of existing data on the safety of probiotic preparations. Additionally, probiotic effects in experimental colitis models might depend on time coordination of disease induction with treatment duration.
authors.affiliation: Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia.
authors.forename: Jovanka
authors.initials: J
authors.lastname: Lukic
authors.forename: Ivana
authors.initials: I
authors.lastname: Strahinic
authors.forename: Marina
authors.initials: M
authors.lastname: Milenkovic
authors.forename: Natasa
authors.initials: N
authors.lastname: Golic
authors.forename: Milan
authors.initials: M
authors.lastname: Kojic
authors.forename: Ljubisa
authors.initials: L
authors.lastname: Topisirovic
authors.forename: Jelena
authors.initials: J
authors.lastname: Begovic
mesh_terms: D000818:Animals; D003092:Colitis / Q000139:chemically induced / Q000382:microbiology*; D016207:Cytokines / Q000096:biosynthesis*; D004195:Disease Models, Animal; D054884:Host-Pathogen Interactions; D007413:Intestinal Mucosa / Q000382:microbiology*; D052197:Limosilactobacillus fermentum / Q000502:physiology*; D012333:RNA, Messenger / Q000032:analysis / Q000235:genetics; D051381:Rats; D014302:Trinitrobenzenesulfonic Acid / Q000008:administration & dosage / Q000633:toxicity
chemical_list: D016207:Cytokines; D012333:RNA, Messenger; D014302:Trinitrobenzenesulfonic Acid