STING manifests self DNA-dependent inflammatory disease

Jeonghyun Ahn, Delia Gutman, Shinobu Saijo, Glen N. Barber

Research output: Contribution to journalArticle

246 Scopus citations

Abstract

Inflammatory autoimmune diseases such as systemic lupus erythematosus (SLE) and polyarthritis are characterized by chronic cytokine overproduction, suggesting that the stimulation of host innate immune responses, speculatively by persistent infection or self nucleic acids, plays a role in themanifestation of these disorders. Mice lacking DNase II die during embryonic development through comparable inflammatory disease because phagocytosed DNA from apoptotic cells cannot be adequately digested and intracellular host DNA sensor pathways are engaged, resulting in the production of a variety of cytokines including type I IFN. The cellular sensor pathway(s) responsible for triggering DNA-mediated inflammation aggravated autoimmune disease remains to be determined. However, we report here that Stimulator of IFN Genes (STING) is responsible for inflammation-related embryonic death in DNase II defective mice initiated by self DNA. DNase II-dependent embryonic lethality was rescued by loss of STING function, and polyarthritis completely prevented because cytosolic DNA failed to robustly trigger cytokine production through STING-controlled signaling pathways. Our data provides significant molecular insight into the causes of DNA-mediated inflammatory disorders and affords a target that could plausibly be therapeutically controlled to help prevent such diseases.

Original languageEnglish (US)
Pages (from-to)19386-19391
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume109
Issue number47
DOIs
StatePublished - Nov 20 2012

Keywords

  • Apoptosis
  • Dendritic cells
  • Macrophage
  • Necrosis

ASJC Scopus subject areas

  • General

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