BACKGROUND: Agents neutralizing membrane tumor necrosis factor (mTNF) and soluble TNF (sTNF) are widely used for the treatment of inflammatory bowel disease (IBD). Neutralization of mTNF, however, is associated with increased susceptibility to infectious diseases. The aim of this study was to determine whether neutralization of sTNF exclusively, by the use of a dominant negative mutant of TNF (XENP1595), could reduce the severity of colitis in mice. METHODS: Colitis was induced in immunodeficient mice by transfer of CD45RB(hi) CD25 T-cells. Once the disease had developed, mice were treated twice a week with XENP1595, phosphate-buffered saline (PBS), anti-TNF monoclonal antibody (mAb), or isotype control. The anti-TNF mAb blocks both mTNF and sTNF. Weights, disease activity index, macroscopic inflammation of the colon, and histological sections were evaluated. T-cell populations from the colon were analyzed by flow cytometry. RESULTS: Treatment of mice with XENP1595 did not change the course of the disease, whereas mice treated with anti-TNF mAb recovered weight soon after the first treatment dose. Inflammation in the colon was reduced in mice treated with anti-TNF mAb compared to isotype control-treated animals. Mice treated with XENP1595 had a similar degree of inflammation in the colon as PBS-treated animals. The number of effector and regulatory T-cells in the colon remained unaffected by all treatments. CONCLUSIONS: Neutralization of sTNF exclusively was unable to induce remission in T-cell-mediated colitis, suggesting that neutralization of mTNF is crucial for the treatment of IBD.
BACKGROUND: Agents neutralizing membrane tumor necrosis factor (mTNF) and soluble TNF (sTNF) are widely used for the treatment of inflammatory bowel disease (IBD). Neutralization of mTNF, however, is associated with increased susceptibility to infectious diseases. The aim of this study was to determine whether neutralization of sTNF exclusively, by the use of a dominant negative mutant of TNF (XENP1595), could reduce the severity of colitis in mice. METHODS:Colitis was induced in immunodeficientmice by transfer of CD45RB(hi) CD25 T-cells. Once the disease had developed, mice were treated twice a week with XENP1595, phosphate-buffered saline (PBS), anti-TNF monoclonal antibody (mAb), or isotype control. The anti-TNF mAb blocks both mTNF and sTNF. Weights, disease activity index, macroscopic inflammation of the colon, and histological sections were evaluated. T-cell populations from the colon were analyzed by flow cytometry. RESULTS: Treatment of mice with XENP1595 did not change the course of the disease, whereas mice treated with anti-TNF mAb recovered weight soon after the first treatment dose. Inflammation in the colon was reduced in mice treated with anti-TNF mAb compared to isotype control-treated animals. Mice treated with XENP1595 had a similar degree of inflammation in the colon as PBS-treated animals. The number of effector and regulatory T-cells in the colon remained unaffected by all treatments. CONCLUSIONS: Neutralization of sTNF exclusively was unable to induce remission in T-cell-mediated colitis, suggesting that neutralization of mTNF is crucial for the treatment of IBD.
Authors: Jonathan L Digby-Bell; Raja Atreya; Giovanni Monteleone; Nick Powell Journal: Nat Rev Gastroenterol Hepatol Date: 2019-11-25 Impact factor: 46.802
Authors: Christine Breynaert; Tom Dresselaers; Clémentine Perrier; Ingrid Arijs; Jonathan Cremer; Leentje Van Lommel; Kristel Van Steen; Marc Ferrante; Frans Schuit; Séverine Vermeire; Paul Rutgeerts; Uwe Himmelreich; Jan L Ceuppens; Karel Geboes; Gert Van Assche Journal: PLoS One Date: 2013-07-23 Impact factor: 3.240
Authors: Fabian Richter; Timo Liebig; Eric Guenzi; Andreas Herrmann; Peter Scheurich; Klaus Pfizenmaier; Roland E Kontermann Journal: PLoS One Date: 2013-08-19 Impact factor: 3.240