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首页> 外文期刊>Neuroscience Letters: An International Multidisciplinary Journal Devoted to the Rapid Publication of Basic Research in the Brain Sciences >Heparin inhibits induction of nitric oxide synthase by cytokines in rat brain microvascular endothelial cells.
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Heparin inhibits induction of nitric oxide synthase by cytokines in rat brain microvascular endothelial cells.

机译:肝素抑制大鼠脑微血管内皮细胞中细胞因子对一氧化氮合酶的诱导。

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摘要

The inflammatory reaction following ischemic brain injury involves bioactive mediators released mainly from leukocytes. The aim of this in vitro-study was to evaluate possible modulatory actions of heparin on nitric oxide synthesis induced by proinflammatory cytokines. Rat microvascular brain endothelial cells were isolated from adult rat brains and treated with interferon-gamma (IFN-gamma) and interleukin-1beta (IL-1beta) with or without heparin. The expression of inducible nitric oxide synthase (iNOS) mRNA and the iNOS protein activity was analyzed by reverse transcription polymerase chain reaction (RT-PCR) and Griess reagent, respectively. Heparin in a dose-dependent manner attenuated the increase in iNOS expression and NO release after cytokine activation. Thus, in addition to its anticoagulatory effect, heparin may also be effective in the prevention of inflammatory reaction after cerebral ischemia.
机译:缺血性脑损伤后的炎症反应涉及主要从白细胞释放的生物活性介质。这项体外研究的目的是评估肝素对促炎细胞因子诱导的一氧化氮合成的可能调节作用。从成年大鼠脑中分离大鼠微血管脑内皮细胞,并在有或没有肝素的情况下,用干扰素-γ(IFN-γ)和白介素-1β(IL-1beta)对其进行处理。分别通过逆转录聚合酶链反应(RT-PCR)和Griess试剂分析诱导型一氧化氮合酶(iNOS)mRNA的表达和iNOS蛋白活性。肝素以剂量依赖的方式减弱了细胞因子激活后iNOS表达的增加和NO的释放。因此,除了抗凝作用外,肝素还可以有效预防脑缺血后的炎症反应。

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