Abstract
Recognition of microbial nucleic acids is one strategy by which mammalian hosts respond to infectious agents. Intracellular DNA that is introduced into cells during infection elicits potent inflammatory responses by triggering the induction of antiviral type I IFNs and the maturation and secretion of inflammatory cytokines, such as TNF-α, IL-1β, and IL-18. In addition, if nucleases, such as DNase II or DNase III (Trex1), fail to clear self-DNA, accumulated DNA gains access to intracellular compartments where it drives inflammatory responses leading to autoimmune disease. In this review, we discuss a rapidly evolving view of how cytosolic DNA-sensing machineries coordinate antimicrobial immunity and, if unchecked, lead to autoimmune disease.
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