title: Effects of synbiotic fermentation products on primary chemoprevention in human colon cells.
abstract: The consumption of synbiotics, a mixture of probiotics and indigestible food constituents such as dietary fiber, has been reported to reduce colon cancer risk. We investigated the effects of fermented wheat aleurone enriched with the probiotics Lactobacillus rhamnosus GG/Bifidobacterium animalis supsp. lactis on the gene expression and functional end points related to cellular defence in HT29 and primary human colon cells. Aleurone was digested and fermented in vitro with/without probiotics. The resulting fermentation supernatants (fs) were analyzed for concentrations of deoxycholic acid and ammonia. The cells were treated with the fs, and effects on gene expression of catalase, GSTP1 and SULT2B1, enzyme activity of catalase and glutathione S-transferase as well as H₂O₂-induced DNA damage were examined. Fermentation of aleurone reduced deoxycholic acid concentration by 84%, while the probiotics enhanced this effect. Ammonia was increased by fs aleurone, whereas a reduction occurred by the addition of L. rhamnosus GG/B. animalis supsp. lactis 12. GSTP1 expression tended to result in an increase by the fs aleurone in both cell types, whereas the probiotics could not additionally increase the effect. Catalase was not modulated by fs aleurone enriched with probiotics. Only in HT29 cells, expression of SULT2B1 was enhanced by fs aleurone. Enzyme activity of catalase and glutathione S-transferase was induced (2-3.6 fold, 72 h) in HT29 cells only. Addition of probiotics had no influence on this effect. In HT29 cells, a reduced H₂O₂-induced DNA damage by the fs aleurone after 48 h, enhanced by the addition of probiotics, was detected. The observed effects could improve detoxification of xenobiotics and therefore may lower colon cancer risk.
authors.affiliation: Department of Nutritional Toxicology, Institute for Nutrition, Biological-Pharmaceutical Faculty, Friedrich-Schiller-University Jena, 07743 Jena, Germany. stein.katrin@googlemail.com
authors.forename: Katrin
authors.initials: K
authors.lastname: Stein
authors.forename: Anke
authors.initials: A
authors.lastname: Borowicki
authors.forename: Daniel
authors.initials: D
authors.lastname: Scharlau
authors.forename: Anika
authors.initials: A
authors.lastname: Schettler
authors.forename: Kerstin
authors.initials: K
authors.lastname: Scheu
authors.forename: Ursula
authors.initials: U
authors.lastname: Obst
authors.forename: Michael
authors.initials: M
authors.lastname: Glei
mesh_terms: D001644:Bifidobacterium / Q000254:growth & development; D002374:Catalase / Q000235:genetics / Q000378:metabolism; D018890:Chemoprevention; D003106:Colon / Q000166:cytology* / Q000187:drug effects* / Q000382:microbiology; D004249:DNA Damage / Q000187:drug effects; D003840:Deoxycholic Acid / Q000032:analysis / Q000378:metabolism; D004043:Dietary Fiber / Q000008:administration & dosage*; D005260:Female; D005285:Fermentation; D051549:Glutathione S-Transferase pi / Q000235:genetics / Q000378:metabolism; D005982:Glutathione Transferase / Q000378:metabolism; D019073:HT29 Cells; D006801:Humans; D006861:Hydrogen Peroxide / Q000378:metabolism; D052201:Lacticaseibacillus rhamnosus / Q000254:growth & development; D008297:Male; D019936:Probiotics / Q000378:metabolism*; D015238:Sulfotransferases / Q000235:genetics / Q000378:metabolism; D058616:Synbiotics; D014908:Triticum / Q000737:chemistry
chemical_list: D004043:Dietary Fiber; D003840:Deoxycholic Acid; D006861:Hydrogen Peroxide; D002374:Catalase; C496556:GSTP1 protein, human; D051549:Glutathione S-Transferase pi; D005982:Glutathione Transferase; D015238:Sulfotransferases; C433248:SULT2B1 protein, human