Brain research, 2004-01, Vol.996 (1), p.55-66
2004
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- Autor(en) / Beteiligte
- Titel
- Inhibition of MEK/ERK 1/2 pathway reduces pro-inflammatory cytokine interleukin-1 expression in focal cerebral ischemia
- Ist Teil von
- Brain research, 2004-01, Vol.996 (1), p.55-66
- Ort / Verlag
- London: Elsevier B.V
- Erscheinungsjahr
- 2004
- Quelle
- MEDLINE
- Beschreibungen/Notizen
- It has been proposed that mitogen-activated protein kinase (MAPK) pathways may play a role in the regulation of pro-inflammatory cytokines, such as interlukine-1, during cerebral ischemia. Our previous study showed that extracellular-signal-regulated kinases 1 and 2 (ERK 1/2) were activated during focal cerebral ischemia in mice [J. Cereb. Blood Flow Metab. 20 (2000) 1320]. However, the effect of ERK 1/2 activation in focal cerebral ischemia is still unclear. In this study we reported that in vivo phospho-ERK 1/2 expression increased following 30 min of middle cerebral artery occlusion (MCAO) in the mouse brain in both the ischemic core and perifocal regions. Western blot analysis and immunohistochemistry demonstrated that pro-treatment with 1,4-diamino-2,3-dicyano-1,4-bis butadiene (U0126) [J. Biol. Chem. 273 (1998) 18623] could significantly inhibit mouse brain phospho-MEK 1/2 and phospho-ERK 1/2 expression after 1–2 h of MCAO ( p<0.05). Compared to the control group of mice, brain infarct volume was significantly decreased after 24 h of MCAO in the U0126-treated mice (27±6 vs. 46±9 mm 2, p<0.05). Inhibition of the MEK/ERK 1/2 pathway also prevented downstream kinase Elk-1 phosphorylation, and further reduced cytokine IL-1β mRNA, but not TNFα, IL-1α, or chemokine MIP-1α mRNA expression. Our data demonstrates that in vivo the close linking of MEK 1/2, ERK 1/2, Elk-1, and IL-1 mRNA expression in the cerebral ischemia animals suggests that ERK 1/2 pathway activation is important in pro-inflammatory cytokine IL-1β signaling, which induces an inflammatory response and exacerbates ischemic brain injury. Inhibiting the ERK 1/2 pathway may therefore provide a novel approach for the reduction of ischemia-induced IL-1β overexpression.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0006-8993eISSN: 1872-6240DOI: 10.1016/j.brainres.2003.09.074Titel-ID: cdi_proquest_miscellaneous_71559031
- Format
- –
- Schlagworte
- Animals, Biological and medical sciences, Blotting, Western - methods, Brain - drug effects, Brain - metabolism, Brain Ischemia - enzymology, Brain Ischemia - etiology, Brain Ischemia - metabolism, Brain Ischemia - prevention & control, Butadienes - pharmacology, Butadienes - therapeutic use, Chemokine CCL3, Chemokine CCL4, Disease Models, Animal, Dose-Response Relationship, Drug, Enzyme Inhibitors - pharmacology, Enzyme Inhibitors - therapeutic use, Immunohistochemistry - methods, Infarction, Middle Cerebral Artery - complications, Infarction, Middle Cerebral Artery - prevention & control, Inhibition, Interleukin-1 - genetics, Interleukin-1 - metabolism, Ischemia, Macrophage Inflammatory Proteins - genetics, Macrophage Inflammatory Proteins - metabolism, Male, Medical sciences, Mice, Mitogen-activated protein kinase, Mitogen-Activated Protein Kinase 1 - antagonists & inhibitors, Mitogen-Activated Protein Kinase 1 - metabolism, Mitogen-Activated Protein Kinase Kinases - antagonists & inhibitors, Mitogen-Activated Protein Kinase Kinases - metabolism, Mouse, Neurology, Neuroprotection, Nitriles - pharmacology, Nitriles - therapeutic use, Phosphorylation, Time Factors, Tumor Necrosis Factor-alpha - genetics, Tumor Necrosis Factor-alpha - metabolism, Vascular diseases and vascular malformations of the nervous system