期刊
EUROPEAN JOURNAL OF IMMUNOLOGY
卷 41, 期 8, 页码 2341-2348出版社
WILEY
DOI: 10.1002/eji.201041332
关键词
Alarmin; Hepatitis; IL-33; NKT cells
类别
资金
- INSERM
- Ministere de l'Education Nationale de la Recherche et de la Technologie
- University of Rennes 1
- Region Bretagne, National French Society of Gastro-Enterology (SNFGE)
- Ligue contre le cancer
- IFR 140
- Government of Pakistan (Higher Education Commission, University of Agriculture, Faisalabad)
Interleukin-33 (IL-33) is thought to be released during cellular death as an alarmin cytokine during the acute phase of disease, but its regulation in vivo is poorly understood. We investigated the expression of IL-33 in two mouse models of acute hepatitis by administering either carbon tetrachloride (CCl4) or concanavalin A (ConA). IL-33 was overexpressed in both models but with a stronger induction in ConA-induced hepatitis. IL-33 was weakly expressed in vascular and sinusoidal endothelial cells from normal liver and was clearly induced in CCl4-treated mice. Surprisingly, we found that hepatocytes strongly expressed IL-33 exclusively in the ConA model. CD1d knock-out mice, which are deficient in NKT cells and resistant to ConA-induced hepatitis, no longer expressed IL-33 in hepatocytes following ConA administration. Interestingly, invariant NKT (iNKT) cells adoptively transferred into ConA-treated CD1d KO mouse restored IL-33 expression in hepatocytes. This strongly suggests that NKT cells are responsible for the induction of IL-33 in hepatocytes.
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