Cooperation of TLR12 and TLR11 in the IRF8-dependent IL-12 response to Toxoplasma gondii profilin
| Autor: | Reed Pifer, Ezra Burstein, Sergey S. Larin, Megan Raetz, Alexey V. Kibardin, Carolyn R. Sturge, Keiko Ozato, Haiying Li, Felix Yarovinsky |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
UNC93B1
CD8 Antigens Immunology Antigens Protozoan Article Cell Line Mice Profilins parasitic diseases Immunology and Allergy Animals Humans RNA Small Interfering Transcription factor Mice Knockout Innate immune system biology Toll-Like Receptors NF-kappa B Toxoplasma gondii Membrane Transport Proteins Dendritic Cells biology.organism_classification Interleukin-12 Cell biology Mice Inbred C57BL HEK293 Cells Toxoplasmosis Animal Profilin Interferon Regulatory Factors Myeloid Differentiation Factor 88 biology.protein RNA Interference IRF8 Toxoplasma Interferon regulatory factors Protein Binding Signal Transduction |
| Popis: | TLRs play a central role in the innate recognition of pathogens and the activation of dendritic cells (DCs). In this study, we establish that, in addition to TLR11, TLR12 recognizes the profilin protein of the protozoan parasite Toxoplasma gondii and regulates IL-12 production by DCs in response to the parasite. Similar to TLR11, TLR12 is an endolysosomal innate immune receptor that colocalizes and interacts with UNC93B1. Biochemical experiments revealed that TLR11 and TLR12 directly bind to T. gondii profilin and are capable of forming a heterodimer complex. We also establish that the transcription factor IFN regulatory factor 8, not NF-κB, plays a central role in the regulation of the TLR11- and TLR12-dependent IL-12 response of DCs. These results suggest a central role for IFN regulatory factor 8–expressing CD8+ DCs in governing the TLR11- and TLR12-mediated host defense against T. gondii. |
| Databáze: | OpenAIRE |
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