STAT3 Acts as a Co-activator of Glucocorticoid Receptor Signaling

作者：Zhixin Zhang, Simon A. Jones, James S. Hagood, Nelson L. Fuentes, Gerald M. Fuller · 发表于：Journal of Biological Chemistry · 年份：1997 · DOI：10.1074/jbc.272.49.30607 · 被引用次数：241 · 研究领域：Cytokine Signaling Pathways and Interactions、NF-κB Signaling Pathways、Immune Response and Inflammation

Interleukin-6 (IL-6) and glucocorticoids are important mediators of inflammatory and immunological responses. Glucocorticoids are known to synergistically enhance IL-6-mediated cellular responses. We now show that IL-6 also has a synergistic effect upon glucocorticoid signaling. In particular, IL-6-activated STAT3 associates with ligand-bound glucocorticoid receptor to form a transactivating/signaling complex, which can function through either an IL-6-responsive element or a glucocorticoid-responsive element. These findings reveal a new level of interaction between these two crucial signaling cascades and indicate that activated STAT3 can also act as a transcriptional co-activator without direct association with its DNA binding motif.