Abstract
The activation of innate immune responses by nucleic acids is critical to host responses against pathogens, such as viruses; however, nucleic acids can also trigger the development and/or exacerbation of pathogenic responses such as autoimmunity. We previously demonstrated that the selective activation of nucleic acid-sensing cytosolic and Toll-like receptors is contingent on the promiscuous sensing of nucleic acids by high-mobility group box proteins (HMGBs). Basides these findings, we also found that nonimmunogenic nucleotide with high-affinity HMGB binding, termed ISM ODN, functions as suppressing agent for nucleic acid-activated innate immune responses. In this review, we aim to summerize this novel feature of HMGB proteins in nucleic acid-mediated innate immune responses. In addition, we will discuss the inhibitory effect of nonimmunogenic oligodeoxynucleotides (ni-ODNs) targeting HMGB proteins.
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