BACKGROUND: The ability of intestinal helminths to manipulate the immune system of their host towards a Th2 response has been proposed to modulate auto-immune and allergic diseases. AIMS: This initial study investigated the anti-inflammatory potential of S. mansoni and soluble egg antigen (SEA) in a murine model of colitis. METHODS: Colitis was induced in female NMRI mice by 5% dextran sulfate sodium (DSS) for 7 days, either 9 weeks post-infection with S. mansoni or during treatment with SEA. In addition to clinical signs of colitis, colon histology, immunohistochemistry, and flow cytometry of leukocytes were performed. Colon cytokines were measured using a quantitative real-time technique. RESULTS: Infection with cercariae of S. mansoni attenuated DSS-induced colitis. Clinical symptoms such as weight loss and shortening of colon length were significantly prevented. Histological scores and cell infiltration were affected and expression of pro-inflammatory cytokines in the colons of infected DSS colitis mice was reduced. In contrast, application of SEA failed to improve colitis, even though some findings like earlier manifestation of inflammation and local induction of Th2 cytokines were similar to the effects of cercarial infection. CONCLUSIONS: The results presented here suggest that SEA treatment could not protect mice from acute colitis. However, both infection with S. mansoni and injection of SEA affect mucosal immune responses.
BACKGROUND: The ability of intestinal helminths to manipulate the immune system of their host towards a Th2 response has been proposed to modulate auto-immune and allergic diseases. AIMS: This initial study investigated the anti-inflammatory potential of S. mansoni and soluble egg antigen (SEA) in a murine model of colitis. METHODS:Colitis was induced in female NMRI mice by 5% dextran sulfate sodium (DSS) for 7 days, either 9 weeks post-infection with S. mansoni or during treatment with SEA. In addition to clinical signs of colitis, colon histology, immunohistochemistry, and flow cytometry of leukocytes were performed. Colon cytokines were measured using a quantitative real-time technique. RESULTS: Infection with cercariae of S. mansoni attenuated DSS-induced colitis. Clinical symptoms such as weight loss and shortening of colon length were significantly prevented. Histological scores and cell infiltration were affected and expression of pro-inflammatory cytokines in the colons of infected DSS colitismice was reduced. In contrast, application of SEA failed to improve colitis, even though some findings like earlier manifestation of inflammation and local induction of Th2 cytokines were similar to the effects of cercarial infection. CONCLUSIONS: The results presented here suggest that SEA treatment could not protect mice from acute colitis. However, both infection with S. mansoni and injection of SEA affect mucosal immune responses.
Authors: Robert W Summers; David E Elliott; Joseph F Urban; Robin A Thompson; Joel V Weinstock Journal: Gastroenterology Date: 2005-04 Impact factor: 22.682
Authors: Nathalie E Ruyssers; Benedicte Y De Winter; Joris G De Man; Alex Loukas; Mark S Pearson; Joel V Weinstock; Rita M Van den Bossche; Wim Martinet; Paul A Pelckmans; Tom G Moreels Journal: Inflamm Bowel Dis Date: 2009-04 Impact factor: 5.325
Authors: Philip Smith; Niamh E Mangan; Caitriona M Walsh; Rosie E Fallon; Andrew N J McKenzie; Nico van Rooijen; Padraic G Fallon Journal: J Immunol Date: 2007-04-01 Impact factor: 5.422
Authors: Neuza Maria Alcântara-Neves; Gabriela de S G Britto; Rafael Valente Veiga; Camila A Figueiredo; Rosimeire Leovigildo Fiaccone; Jackson S da Conceição; Álvaro Augusto Cruz; Laura Cunha Rodrigues; Philip John Cooper; Lain C Pontes-de-Carvalho; Maurício Lima Barreto Journal: BMC Res Notes Date: 2014-11-19