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Cutting edge: STING mediates protection against colorectal tumorigenesis by governing the magnitude of intestinal inflammation
Journal article   Peer reviewed

Cutting edge: STING mediates protection against colorectal tumorigenesis by governing the magnitude of intestinal inflammation

Qifan Zhu, Si Ming Man, Prajwal Gurung, Zhiping Liu, Peter Vogel, Mohamed Lamkanfi and Thirumala-Devi Kanneganti
The Journal of immunology (1950), Vol.193(10), pp.4779-4782
11/15/2014
DOI: 10.4049/jimmunol.1402051
PMCID: PMC4308418
PMID: 25320273

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Abstract

Stimulator of IFN genes (STING) is a cytoplasmic innate immune sensor for cyclic dinucleotides that also serves a dual role as an adaptor molecule for a number of intracellular DNA receptors. Although STING has important functions in the host defense against pathogens and autoimmune diseases, its physiological role in cancer is unknown. In this study, we show that STING-deficient mice are highly susceptible to colitis-associated colorectal cancer. Colons of STING-deficient mice exhibit significant intestinal damage and overt proliferation during early stages of tumorigenesis. Moreover, STING-deficient mice fail to restrict activation of the NF-κB- and STAT3-signaling pathways, which leads to increased levels of the proinflammatory cytokines IL-6 and KC. Therefore, our results identified an unexpected and important role for STING in mediating protection against colorectal tumorigenesis.
Colitis - genetics Colorectal Neoplasms - genetics Colitis - complications NF-kappa B - immunology Colitis - pathology Colon - immunology Chemokine CXCL1 - genetics Membrane Proteins - deficiency Colorectal Neoplasms - etiology Colitis - immunology STAT3 Transcription Factor - genetics Interleukin-6 - genetics Signal Transduction Colon - pathology Gene Expression Regulation - immunology Membrane Proteins - genetics Membrane Proteins - immunology Mice, Knockout Chemokine CXCL1 - immunology Animals Colorectal Neoplasms - immunology NF-kappa B - genetics Interleukin-6 - immunology Mice STAT3 Transcription Factor - immunology Colorectal Neoplasms - pathology

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