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- W2007806195 abstract "Pathological conditions such as ischaemic stroke and inflammatory disorders cause c-fos activation in the brain. This activation contributes to the initiation of the brain's inflammatory response, orchestrated by activated glial cells. The inflammatory signalling cascades leading to c-fos activation in glial cells are not well characterized. Thus, we have attempted a detailed analysis of the cis-acting elements, transcription factors and upstream kinase pathways involved in the activation of c-fos by lipopolysaccharide (LPS) in primary rat cortical glial cells. We found that (1) LPS-induced c-fos mRNA levels were sensitive to p38 mitogen-activated protein kinase (MAPK) inhibitors but not to mitogen-activated/extracellular signal-regulated kinase (ERK) or calcium-calmodulin-dependent kinase inhibitors, (2) LPS activated both serum response element (SRE) and cyclic AMP/calcium response element (CRE)-driven luciferase reporters in transient transfection assays, (3) LPS induced the phosphorylation of Elk1 CRE-binding protein (CREB)/activated transcription factor-1 (ATF-1) and the activation of GAL4-Elk1 and GAL4-CREB chimeric proteins, and (4) mutation of both SRE and CRE elements was necessary and sufficient to completely abolish LPS induction of a rat c-fos proximal promoter-luciferase reporter. Thus, c-fos activation by LPS in glial cells occurs via the SRE or CRE in an independent manner, and involves the Elk1 or CREB/ATF-1 transcription factors. Elk1-mediated transactivation was dependent on p38 MAPK, suggesting a crucial role of these factors in mediating inflammatory responses in the CNS." @default.
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- W2007806195 date "2005-01-26" @default.
- W2007806195 modified "2023-10-17" @default.
- W2007806195 title "Activation of c‐<i>fos</i> by lipopolysaccharide in glial cells via p38 mitogen‐activated protein kinase‐dependent activation of serum or cyclic AMP/calcium response element" @default.
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- W2007806195 doi "https://doi.org/10.1111/j.1471-4159.2004.02938.x" @default.
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