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In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse
07:46

In Vitro Differentiation of Naive CD4+ T Cells into Pathogenic Th17 Cells in Mouse

Published on: October 25, 2024

Helicobacter pylori-infected macrophages induce Th17 cell differentiation

Yuan Zhuang1, Yun Shi, Xiao-Fei Liu

  • 1Department of Clinical Microbiology and Immunology, College of Medical Laboratory Science, Third Military Medical University, Chongqing 400038, PR China.

Immunobiology
|November 30, 2010
PubMed

Th17 cells represent a novel subset of CD4(+) T cells, which is associated with chronic inflammation. The present study evaluated Th17 cell responses to Helicobacter pylori infection in mouse model and CD4(+) T cell differentiation in response to H. pylori-infected macrophages. Th17 cells were observed in the H. pylori-infected gastric tissue. Co-culture of CD4(+) T cells with H. pylori-infected macrophages elevated IL-17 and IFN-γ secretion, up-regulated retinoid-related orphan receptor gamma t (RORγt) and T box expressed in T cells (T-bet) expression and increased the numbers of Th17 and Th1 cells. The expression of CD40, CD80, and CD86 and the secretion of IL-6, TGF-β1, IL-23, and CCL20 were significantly increased in H. pylori-stimulated macrophages. NF-κB pathway participated in the production of IL-6, IL-23, and CCL20 from macrophages in response to H. pylori, and inhibition of NF-κB pathway of macrophages resulted in less Th17 cell differentiation. Taken together, these results suggest that H. pylori induces Th17 cell differentiation via infected macrophages.

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