| First Author | Hara H | Year | 2018 |
| Journal | Cell | Volume | 175 |
| Issue | 6 | Pages | 1651-1664.e14 |
| PubMed ID | 30392956 | Mgi Jnum | J:267416 |
| Mgi Id | MGI:6259277 | Doi | 10.1016/j.cell.2018.09.047 |
| Citation | Hara H, et al. (2018) The NLRP6 Inflammasome Recognizes Lipoteichoic Acid and Regulates Gram-Positive Pathogen Infection. Cell |
| abstractText | The activator and composition of the NLRP6 inflammasome remain poorly understood. We find that lipoteichoic acid (LTA), a molecule produced by Gram-positive bacteria, binds and activates NLRP6. In response to cytosolic LTA or infection with Listeria monocytogenes, NLRP6 recruited caspase-11 and caspase-1 via the adaptor ASC. NLRP6 activation by LTA induced processing of caspase-11, which promoted caspase-1 activation and interleukin-1beta (IL-1beta)/IL-18 maturation in macrophages. Nlrp6(-/-) and Casp11(-/-) mice were less susceptible to L. monocytogenes infection, which was associated with reduced pathogen loads and impaired IL-18 production. Administration of IL-18 to Nlrp6(-/-) or Casp11(-/-) mice restored the susceptibility of mutant mice to L. monocytogenes infection. These results reveal a previously unrecognized innate immunity pathway triggered by cytosolic LTA that is sensed by NLRP6 and exacerbates systemic Gram-positive pathogen infection via the production of IL-18. |
