Lactobacillus fermentum attenuates the proinflammatory effect of Yersinia enterocolitica on human epithelial cells.
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Lactobacillus fermentum attenuates the proinflammatory effect of Yersinia enterocolitica on human epithelial cells. / Frick, Julia-Stefanie; Schenk, Katrin; Quitadamo, Matteo; Kahl, Frauke; Köberle, Martin; Bohn, Erwin; Aepfelbacher, Martin; Autenrieth, Ingo B.
in: INFLAMM BOWEL DIS, Jahrgang 13, Nr. 1, 1, 2007, S. 83-90.Publikationen: SCORING: Beitrag in Fachzeitschrift/Zeitung › SCORING: Zeitschriftenaufsatz › Forschung › Begutachtung
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T1 - Lactobacillus fermentum attenuates the proinflammatory effect of Yersinia enterocolitica on human epithelial cells.
AU - Frick, Julia-Stefanie
AU - Schenk, Katrin
AU - Quitadamo, Matteo
AU - Kahl, Frauke
AU - Köberle, Martin
AU - Bohn, Erwin
AU - Aepfelbacher, Martin
AU - Autenrieth, Ingo B
PY - 2007
Y1 - 2007
N2 - BACKGROUND: Lactobacilli represent a major component of the human microbiota. In this study we investigated whether and how Lactobacillus fermentum inhibits the proinflammatory responses of human epithelial cells on Yersinia enterocolitica infection. METHODS: Human epithelial cells were exposed to Y. enterocolitica pYV(-) or L. fermentum or to both strains, combinations of heat-killed L. fermentum or supernatant of L. fermentum cultures and Y. enterocolitica. The modulation of Y. enterocolitica induced IL-8 levels in the culture supernatants was determined and activation of Rac, p38, and NF-kappaB was investigated. RESULTS: Exposure of human epithelial cells to L. fermentum does not induce NF-kappaB activation and subsequent IL-8 secretion in HeLa cells, whereas Y. enterocolitica induces NF-kappaB activation and high levels of IL-8. Viable L. fermentum, supernatant of L. fermentum cultures, but not heat-killed L. fermentum, inhibited IL-8 secretion of HeLa cells triggered by Y. enterocolitica. Lactobacillus fermentum-exposed HeLa cells showed decreased Rac, p38, and NF-kappaB activation after Y. enterocolitica infection. Treatment of L. fermentum supernatants with phospholipase C abolished the inhibitory effect, indicating that a secreted phospholipid mediates the antiinflammatory properties of L. fermentum. Adhesion to or invasion of Y. enterocolitica into epithelial cells was not altered by coincubation with L. fermentum. CONCLUSION: Our results lead to the conclusion that L. fermentum inhibits the Y. enterocolitica-induced IL-8 production by a possibly secreted phospholipid of
AB - BACKGROUND: Lactobacilli represent a major component of the human microbiota. In this study we investigated whether and how Lactobacillus fermentum inhibits the proinflammatory responses of human epithelial cells on Yersinia enterocolitica infection. METHODS: Human epithelial cells were exposed to Y. enterocolitica pYV(-) or L. fermentum or to both strains, combinations of heat-killed L. fermentum or supernatant of L. fermentum cultures and Y. enterocolitica. The modulation of Y. enterocolitica induced IL-8 levels in the culture supernatants was determined and activation of Rac, p38, and NF-kappaB was investigated. RESULTS: Exposure of human epithelial cells to L. fermentum does not induce NF-kappaB activation and subsequent IL-8 secretion in HeLa cells, whereas Y. enterocolitica induces NF-kappaB activation and high levels of IL-8. Viable L. fermentum, supernatant of L. fermentum cultures, but not heat-killed L. fermentum, inhibited IL-8 secretion of HeLa cells triggered by Y. enterocolitica. Lactobacillus fermentum-exposed HeLa cells showed decreased Rac, p38, and NF-kappaB activation after Y. enterocolitica infection. Treatment of L. fermentum supernatants with phospholipase C abolished the inhibitory effect, indicating that a secreted phospholipid mediates the antiinflammatory properties of L. fermentum. Adhesion to or invasion of Y. enterocolitica into epithelial cells was not altered by coincubation with L. fermentum. CONCLUSION: Our results lead to the conclusion that L. fermentum inhibits the Y. enterocolitica-induced IL-8 production by a possibly secreted phospholipid of
M3 - SCORING: Zeitschriftenaufsatz
VL - 13
SP - 83
EP - 90
JO - INFLAMM BOWEL DIS
JF - INFLAMM BOWEL DIS
SN - 1078-0998
IS - 1
M1 - 1
ER -