Distinct Signal Codes Generate Dendritic Cell Functional Plasticity

Overview

Journal Sci Signal

Specialties Cell Biology
Physiology
Science

Date 2010 Jan 21

PMID 20086239

Citations 69

Authors

Kazuhiko Arima

Norihiko Watanabe

Shino Hanabuchi

Mikyoung Chang

Shao-Cong Sun

Yong-Jun Liu

Affiliations

Soon will be listed here.

Abstract

Our adaptive immune system induces distinct responses to different pathogens because of the functional plasticity of dendritic cells (DCs); however, how DCs program unique responses remains unclear. Here, we found that the cytokine thymic stromal lymphopoietin (TSLP) potently transduced a unique T helper type 2 (T(H)2)-inducing compound signal in DCs. Whereas activation of nuclear factor kappaB (predominantly p50) drove DCs to produce OX40L to induce T(H)2 differentiation, the activation of signal transducer and activator of transcription 6 (STAT6) triggered DCs to secrete chemokines necessary for the recruitment of T(H)2 cells. In addition, TSLP signaling limited the activation of STAT4 and interferon regulatory factor 8 (IRF-8), which are essential factors for the production of the T(H)1-polarizing cytokine interleukin-12 (IL-12). By contrast, Toll-like receptor ligands and CD40 ligand did not activate STAT6 in myeloid DCs, but instead increased the abundance of STAT4 and IRF-8 to induce T(H)1 responses through the production of IL-12. Therefore, we propose that the functional plasticity of DCs relies on elaborate signal codes that are generated by different stimuli.

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