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Expression of NF-κB in the brain and lung and its role in acute lung injury following intracerebral hemorrhage of rats
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- Author:
- No author available
- Journal Title:
- ACTA ACADEMIAE MEDICINAE MILITARIS TERTIAE
- Issue:
- 19
- DOI:
- 10.3321/j.issn:1000-5404.2007.19.009
- Key Word:
- NF-кB;脑出血;急性肺损伤
Abstract： 目的 探讨NF-κB在脑出血(intracerebral hemorrhage,ICH)后在脑、肺组织的表达及在急性肺损伤(acute lung injury ,ALI)中的作用.方法 采用自体血尾状核注入法制备脑出血大鼠模型.将35只大鼠随机分为假手术组(5只),脑出血组(30只),脑出血组又分为6 、12、 24 、48 h和3、5 d 6个亚组.应用HE染色观察各组脑出血周围组织与肺组织的炎症反应情况.RT-PCR法检测脑和肺组织中NF-κB p65 mRNA的表达.放射免疫法测定血清中TNF-α和IL-1β的含量.结果 脑出血后12 h脑水肿明显,24 h血肿周围炎症细胞浸润增多,48 h左右炎症反应最重;脑出血6 h即有间质性肺炎表现和局灶性肺气肿,48～72 h炎症反应达高峰,肺泡结构破坏明显;与假手术组相比,NF-κB p65 mRNA于脑出血6 h在脑血肿周围组织与肺组织中表达均开始增高(P＜0.01),48 h均达高峰(P＜0.01),3～5 d表达仍高于假手术组(P＜0.01);血清TNF-α含量在脑出血6 h开始增高(P＜0.01),48 h最高(P＜0.01),5 d时仍高于假手术组(P＜0.01);IL-1β在脑出血各组中含量均无增高.结论 脑出血可以通过引发炎症反应导致急性肺损伤,NF-кB在其病理生理学过程中起重要作用.
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