DNFB-DNS hapten-induced colitis in mice should not be considered a model of inflammatory bowel disease.

Abstract:

BACKGROUND:The dinitrofluorobenzene/dinitrosulfonic acid (DNFB/DNS) model was originally described as an experimental model of intestinal inflammation resembling human ulcerative colitis (UC). Due to the absence of acceptable UC experimental models for pharmacological preclinical assays, here we examine the immune response induced in this model. METHODS:Balb/c mice were sensitized by skin application of DNFB on day 1, followed by an intrarectal challenge with DNS on day 5. We further expanded this model by administering a second DNS challenge on day 15. The features of colonic inflammation and immune response were evaluated. RESULTS:The changes observed in colonic tissue corresponded, in comparison to the trinitrobenzene sulfonic acid (TNBS) colitis model, to a mild mucosal effect in the colon, which spontaneously resolved in less than 5 days. Furthermore, the second hapten challenge did not exacerbate the inflammatory response. In contrast to other studies, we did not observe any clear involvement of tumor necrosis factor alpha (TNF-α) or other Th1 cytokines during the initial inflammatory response; however, we found that a more Th2-humoral response appeared to mediate the first contact with the hapten. An increased humoral response was detected during the second challenge, although an increased Th1/Th17-cytokine expression profile was also simultaneously observed. CONCLUSIONS:On the basis of these results, although the DNFB/DNS model can display some features found in human UC, it should be considered as a model for the study of the intestinal hypersensitivity seen, for example, during food allergy or irritable bowel syndrome but not intestinal inflammation per se.

journal_name

Inflamm Bowel Dis

authors

Bailón E,Cueto-Sola M,Utrilla P,Nieto A,Garrido-Mesa N,Celada A,Zarzuelo A,Xaus J,Gálvez J,Comalada M

doi

10.1002/ibd.21586

subject

Has Abstract

pub_date

2011-10-01 00:00:00

pages

2087-101

issue

10

eissn

1078-0998

issn

1536-4844

journal_volume

17

pub_type

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