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Review
. 2007 Apr;8(4):345-50.
doi: 10.1038/ni0407-345.

T(H)-17 cells in the circle of immunity and autoimmunity

Estelle Bettelli  1 , Mohamed Oukka, Vijay K Kuchroo
Affiliations
Review

T(H)-17 cells in the circle of immunity and autoimmunity

Estelle Bettelli et al. Nat Immunol. 2007 Apr.

Abstract

CD4(+) effector T cells have been categorized into two subsets: T helper type 1 (T(H)1) and T(H)2. Another subset of T cells that produce interleukin 17 (IL-17; 'T(H)-17 cells') has been identified that is highly proinflammatory and induces severe autoimmunity. Whereas IL-23 serves to expand previously differentiated T(H)-17 cell populations, IL-6 and transforming growth factor-beta (TGF-beta) induce the differentiation of T(H)-17 cells from naive precursors. These data suggest a dichotomy between CD4(+) regulatory T cells positive for the transcription factor Foxp3 and T(H)-17 cells: TGF-beta induces Foxp3 and generates induced regulatory T cells, whereas IL-6 inhibits TGF-beta-driven Foxp3 expression and together with TGF-beta induces T(H)-17 cells. Emerging data regarding T(H)-17 cells suggest a very important function for this T cell subset in immunity and disease.

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