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- Title
Lipopolysaccharide worsens the prognosis of experimental cerebral ischemia via interferon gamma-induced protein 10 recruit in the acute stage.
- Authors
Wang, Ping; Zhang, Jiaqi; Guo, Feifei; Wang, Shuang; Zhang, Yi; Li, Defeng; Xu, Haiyu; Yang, Hongjun
- Abstract
<bold>Background: </bold>Infection is an important clinical complication facing stroke-patients and triples the risk of death within 30 days post-stroke via mechanisms which are poorly understood.<bold>Aims: </bold>We tried to explore the mechanisms that inflammation caused by infections aggravated the ischemic brain injury after middle cerebral artery occlusion (MCAO).<bold>Methods: </bold>We used lipopolysaccharide (LPS) as systemic inflammatory stimuli to explore the mechanisms of aggravated ischemic brain injury after Sprague-Dawley male rats subjected to MCAO. Brain damage was evaluated by cerebral blood perfusion, Longa-5 scores, infarct volume and edema degree. Systemic cytokine responses and inflammatory changes in the plasma and brain were analyzed by ELISA kit, RT2 Profiler™ PCR array, and quantitative real-time PCR. The differential genes were subjected to Gene Ontology enrichment analysis and protein-protein interaction (PPI) network construction.<bold>Results: </bold>Lipopolysaccharide profoundly aggravated the brain damage after 24 h post-MCAO. At the acute stage (ischemia/reperfusion 90 min/3 h), the brain homogenate gene expression of interleukin 6 (IL-6), tumor necrosis factor α (TNF-α), interleukin 1β (IL-1β) and Interferon gamma-induced protein 10 (IP-10) was significantly up-regulated and the contents in plasma and brain homogenate were significantly increased in MCAO and MCAO + LPS group. IP-10 was the only gene with significant difference between MCAO and MCAO + LPS group, which was also in an important position with degrees of ≥ 14 in PPI network.<bold>Conclusions: </bold>It was possible that trace LPS aggravated the ischemic brain injury by induction of excessive IP-10 secretion in the acute stage, leading to excessive inflammatory response, which consequently increased the infarct volume and edema degree 24 h post-MCAO.
- Subjects
CEREBRAL ischemia; TUMOR necrosis factors; BRAIN damage; INTERFERONS; BRAIN injuries; REPERFUSION injury
- Publication
BMC Neuroscience, 2019, Vol 20, Issue 1, p1
- ISSN
1471-2202
- Publication type
journal article
- DOI
10.1186/s12868-019-0547-z