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Interplay between T(h)1 and T(h)17 effector T-cell pathways in the pathogenesis of spontaneous colitis and colon cancer in the Gi2-deficient mouse
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2013 (English)In: International Immunology, ISSN 0953-8178, E-ISSN 1460-2377, Vol. 25, no 1, 35-44 p.Article in journal (Refereed) Published
Abstract [en]

Colitis induced by Gi2-knockout features both T(h)1 and T(h)17 responses.Gi2-deficient mice spontaneously develop colitis. Using xMAP technology and RTPCR, we investigated cytokine/chemokine profiles during histologically defined phases of disease: (i) no/mild, (ii) moderate, (iii) severe colitis without dysplasia/cancer and (iv) severe colitis with dysplasia/cancer, compared with age-matched wild-type (WT) littermates. Colonic dysplasia was observed in 4/11 mice and cancer in 1/11 mice with severe colitis. The histology correlated with progressive increases in colon weight/cm and spleen weight, and decreased thymus weight, all more advanced in mice with dysplasia/cancer. IL-1, IL-6, IL-12p40, IL-17, TNF-, CCL2 and CXCL1 protein levels in colons, but not small intestines increased with colitis progression and were significantly increased in mice with moderate and severe colitis compared with WT mice, irrespective of the absence/presence of dysplasia/cancer. CCL5 did not change during colitis progression. Colonic IL-17 transcription increased 40- to 70-fold in all stages of colitis, whereas IFN- mRNA was gradually up-regulated 12- to 55-fold with colitis progression, and further to 62-fold in mice with dysplasia/cancer. IL-27 mRNA increased 4- to 15-fold during the course of colitis, and colonic IL-21 transcription increased 3-fold in mice with severe colitis, both irrespective of the absence/presence of dysplasia/cancer. FoxP3 transcription was significantly enhanced (3.5-fold) in mice with moderate and severe colitis, but not in mice with dysplasia/cancer, compared with WT mice. Constrained correspondence analysis demonstrated an association between increased protein levels of TNF-, CCL2, IL-1, IL-6 and CXCL1 and dysplasia/cancer. In conclusion, colonic responses are dominated by a mixed T(h)1/T(h)17 phenotype, with increasing T(h)1 cytokine transcription with progression of colitis in Gi2(/) mice.

Place, publisher, year, edition, pages
2013. Vol. 25, no 1, 35-44 p.
Keyword [en]
chemokines, constrained correspondence analysis, dysplasia, inflammatory bowel disease, real-time RTPCR
National Category
Medical and Health Sciences
URN: urn:nbn:se:uu:diva-193516DOI: 10.1093/intimm/dxs089ISI: 000313127400004OAI: oai:DiVA.org:uu-193516DiVA: diva2:602994
Available from: 2013-02-04 Created: 2013-02-04 Last updated: 2013-02-04Bibliographically approved

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