<abstract xmlns="http://www.w3.org/1999/xhtml"><p> An altered immune response to normal gut microflora is important for the pathogenesis of ulcerative colitis (UC). Galectin- 3 (Gal-3) is an endogenous lectin that plays an important pro-inflammatory role in the induction phase of acute colitis by promoting activation of the NLRP3 infl ammasome and production of IL-1β in macrophages. By using dextran sulphate sodium (DSS) induced colitis, a well-established animal model of UC, we determined whether Gal-3 affects the function of colon infiltrating macrophages by interfering with intestinal microfl ora. Our results showed that genetic deletion of Gal-3 significantly attenuates DSS-induced colitis by down-regulating infiltration of phagocytic cells (neutrophils, macrophages and dendritic cells) in colon tissue of DSS-treated mice, and this correlated with differences in bacterial flora of the gut. Antibiotic treatment attenuates DSS-induced colitis in WT and Gal-3-/- mice without affecting differences between the groups. In conclusion, Gram negative bacterial flora play an important role in DSS-induced acute colitis of mice but are not involved in Gal-3 dependent modulation of colon inflammation.</p></abstract>

An altered immune response to normal gut microflora is important for the pathogenesis of ulcerative colitis (UC). Galectin- 3 (Gal-3) is an endogenous lectin that plays an important pro-inflammatory role in the induction phase of acute colitis by promoting activation of the NLRP3 infl ammasome and production of IL-1β in macrophages. By using dextran sulphate sodium (DSS) induced colitis, a well-established animal model of UC, we determined whether Gal-3 affects the function of colon infiltrating macrophages by interfering with intestinal microfl ora. Our results showed that genetic deletion of Gal-3 significantly attenuates DSS-induced colitis by down-regulating infiltration of phagocytic cells (neutrophils, macrophages and dendritic cells) in colon tissue of DSS-treated mice, and this correlated with differences in bacterial flora of the gut. Antibiotic treatment attenuates DSS-induced colitis in WT and Gal-3-/- mice without affecting differences between the groups. In conclusion, Gram negative bacterial flora play an important role in DSS-induced acute colitis of mice but are not involved in Gal-3 dependent modulation of colon inflammation.

Bacterial Flora Play Important Roles in Acute Dextran Sulphate Sodium-Induced Colitis But Are Not Involved in Gal-3 Dependent Modulation of Colon Inflammation

Experimental and Applied Biomedical Research (EABR)

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

An altered immune response to normal gut microflora is important for the pathogenesis of ulcerative colitis (UC). Galectin- 3 (Gal-3) is an endogenous lectin...

Bacterial Flora Play Important Roles in Acute Dextran Sulphate Sodium-Induced Colitis But Are Not Involved in Gal-3 Dependent Modulation of Colon Inflammation

Publicado en línea: 19 oct 2017

Páginas: 213 - 220

Recibido: 19 dic 2016

Aceptado: 01 feb 2016

DOI: https://doi.org/10.1515/sjecr-2017-0022

Palabras clave
acute DSS-induced colitis, microflora, Gal-3

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Bacterial Flora Play Important Roles in Acute Dextran Sulphate Sodium-Induced Colitis But Are Not Involved in Gal-3 Dependent Modulation of Colon Inflammation

Publicado en línea: 19 oct 2017

Páginas: 213 - 220

Recibido: 19 dic 2016

Aceptado: 01 feb 2016

DOI: https://doi.org/10.1515/sjecr-2017-0022

Palabras claveacute DSS-induced colitis, microflora, Gal-3

© 2017

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Palabras clave
acute DSS-induced colitis, microflora, Gal-3