Abstract
Primary sclerosing cholangitis is often complicated by ulcerative colitis. Recently, we reported on Th1-dominant cholangitis associated with experimental colitis, and natural killer T (NKT) cells might play an important role in this model. The aim of this study was to clarify the immunopathogenic role of NKT cells in this model using α-galactosylceramide. CD-1 mice were administered 2.0% dextran sulfate sodium for 29 days and injection of α-galactosylceramide was performed every 5 days, then inflammation was assessed. Mononuclear cells from the liver were analyzed with respect to cytokine production and the surface marker. α -Galactosylceramide improved survival rate, weight gain, and inflammation score. Also, interferon-γ release from MNC, CD4/CD8 ratio, NKT cell population, and NK cell population were decreased by this treatment. These findings indicate that repeated stimulation of NKT cells modifies the Th1/Th2 balance to reduce Th1 dominance, and this may be a mechanism by which α -galactosylceramide has a therapeutic effect.
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Numata, Y., Tazuma, S., Ueno, Y. et al. Therapeutic Effect of Repeated Natural Killer T Cell Stimulation in Mouse Cholangitis Complicated by Colitis. Dig Dis Sci 50, 1844–1851 (2005). https://doi.org/10.1007/s10620-005-2949-2
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DOI: https://doi.org/10.1007/s10620-005-2949-2