Interleukin-1-induced interleukin-6 synthesis is mediated by the neutral sphingomyelinase/Src kinase pathway in neurones
| Autor: | N, Tsakiri, I, Kimber, N J, Rothwell, E, Pinteaux |
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| Rok vydání: | 2007 |
| Předmět: |
Cerebral Cortex
Neurons Receptors Interleukin-1 Type I Interleukin-6 Interleukin-1beta Receptors N-Methyl-D-Aspartate Research Papers Recombinant Proteins Enzyme Activation Mice Inbred C57BL Mice Sphingomyelin Phosphodiesterase src-Family Kinases Animals Phosphorylation Calcium-Calmodulin-Dependent Protein Kinase Type 2 Cyclic AMP Response Element-Binding Protein Signal Transduction |
| Zdroj: | British journal of pharmacology. 153(4) |
| ISSN: | 0007-1188 |
| Popis: | Interleukin (IL)-1 is a key mediator of inflammatory and host defence responses and its effects in the brain are mediated primarily via effects on glia. IL-1 induces release of inflammatory mediators such as IL-6 from glia via the type-1 receptor (IL-1R1) and established signalling mechanisms including mitogen-activated protein kinases and nuclear factor kappa-B. IL-1 also modifies physiological functions via actions on neurones, through activation of the neutral sphingomyelinase (nSMase)/Src kinase signalling pathway, although the mechanism of IL-1-induced IL-6 synthesis in neurones remains unknown.Primary mouse neuronal cell cultures, ELISA, Western blot and immunocytochemistry techniques were used.We show here that IL-1beta induces the synthesis of IL-6 in primary mouse neuronal cultures, and this is dependent on the activation of IL-1R1, nSMase and Src kinase. We demonstrate that IL-1beta-induced Src kinase activation triggers the phosphorylation of the NMDA receptor NR2B subunit, leading to activation of Ca(2+)/calmodulin-dependent protein kinase II (CamKII) and the nuclear transcription factor CREB. We also show that NR2B, CamKII and CREB are essential signalling elements involved in IL-1beta-induced IL-6 synthesis in neurones.These results demonstrate that IL-1 interacts with the same receptors on neurones and glia to elicit IL-6 release, but does so via distinct signalling pathways. The mechanism by which IL-1beta induces IL-6 synthesis in neurones could be critical in both physiological and pathophysiological actions of IL-1beta, and may provide a new therapeutic target for the treatment of acute CNS injury. |
| Databáze: | OpenAIRE |
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