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- W2901887008 abstract "Abstract Invariant natural killer T (iNKT) cells play critical roles in autoimmune, anti‐tumor, and anti‐microbial immune responses, and are activated by glycolipids presented by the MHC class I‐like molecule, CD1d. How the activation of signaling pathways impacts antigen (Ag)‐dependent iNKT cell activation is not well‐known. In the current study, we found that the MAPK JNK2 not only negatively regulates CD1d‐mediated Ag presentation in APCs, but also contributes to CD1d‐independent iNKT cell activation. A deficiency in the JNK2 (but not JNK1) isoform enhanced Ag presentation by CD1d. Using a vaccinia virus (VV) infection model known to cause a loss in iNKT cells in a CD1d‐independent, but IL‐12‐dependent manner, we found the virus‐induced loss of iNKT cells in JNK2 KO mice was substantially lower than that observed in JNK1 KO or wild‐type (WT) mice. Importantly, compared to WT mice, JNK2 KO mouse iNKT cells were found to express less surface IL‐12 receptors. As with a VV infection, an IL‐12 injection also resulted in a smaller decrease in JNK2 KO iNKT cells as compared to WT mice. Overall, our work strongly suggests JNK2 is a negative regulator of CD1d‐mediated Ag presentation and contributes to IL‐12‐induced iNKT cell activation and loss during viral infections." @default.
- W2901887008 created "2018-11-29" @default.
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- W2901887008 date "2018-12-03" @default.
- W2901887008 modified "2023-10-16" @default.
- W2901887008 title "JNK2 modulates the CD1d‐dependent and ‐independent activation of iNKT cells" @default.
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- W2901887008 doi "https://doi.org/10.1002/eji.201847755" @default.
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