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Updated: Sep 30, 2026

Stimulation of Cytoplasmic DNA Sensing Pathways In Vitro and In Vivo
Published on: September 18, 2014
Glucocorticoids differentially regulate the innate immune responses of TLR4 and the cytosolic DNA sensing pathway
Jinli Wang1, Ruining Wang1, Jiahui Yang1
1Institute of Molecular Immunology, School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou 510515, China.
Abstract:
Glucocorticoids (GCs) are widely used to treat the chronic inflammatory disorders because of their powerful anti-inflammatory properties; however, their effects on macrophage-mediated immune responses are not completely understood. In the present study, we found that GCs decreased LPS-mediated TBK1 activation and the expression of IFN-β, RANTES and CXCL-10; however, poly(dA:dT)-induced TBK1 activity and cytokine expression were not affected by GCs treatment. Furthermore, GCs decreased the expression of key autophagy-related genes (ATGs), including ATG5, ATG7 and ATG12, and inhibited autophagy in macrophages after LPS stimulation. However, GCs had no effect on poly(dA:dT)-mediated autophagy and ATG expression in macrophages. Collectively, this study demonstrates that GCs inhibit the TLR4-mediated innate immune response, but do not affect the cytosolic DNA sensing pathway. This provides new insights into the immunomodulatory mechanisms of GCs in macrophages, which may provide useful information for the clinical use of GCs in treating chronic inflammatory disorders.
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