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On-Chip Endothelial Inflammatory Phenotyping
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直接证据表明细胞因子参与了新极度增生症
J E Rectenwald1, L L Moldawer, T S Huber
1University of Florida College of Medicine, Malcom Randall VAMC, Gainesville, FL, USA.
Circulation
|October 4, 2000
概括
瘤坏死因子-α (TNF-α) 和介质素-1 (IL-1) 驱动新极度增生 (NIH) 作为对低剪压的反应. 阻止这些炎症性细胞因子可能会减少NIH的发展.
科学领域:
- 血管生物学 血管生物学
- 炎症研究的研究.
- 心血管疾病是什么心血管疾病
背景情况:
- 瘤坏死因子-α (TNF-α) 和互白素-1 (IL-1) 是关键的炎症类细胞因子,参与细胞反应.
- 这些细胞因子影响血管光滑肌肉细胞的行为,并与诸如新极度增生症 (NIH) 等炎症状况有关.
- 研究了内源性TNF-alpha和IL-1在NIH诱导的低剪压中的作用.
研究的目的:
- 测试一种假设,即内源性TNF-alpha和IL-1调节由低切割应力诱导的新极度增生症 (NIH).
- 阐明TNF-alpha和IL-1对NIH在应对改变血液流量的发展中的具体贡献.
主要方法:
- 在小鼠中进行单侧常常动脉 (CCA) 绑定,以诱导低剪压和NIH.
- 用逆转录酶-聚合酶链反应 (RT-PCR) 分析了TNF-alpha和IL-1alpha的基因表达.
- 研究使用了野生类型 (WT),TNF-α淘汰 (TNF-/-) 和IL-1受体淘汰 (IL-1RI-/-) 的小鼠.
主要成果:
- 在结合的CCA中检测到TNF-alpha和IL-1alphamRNA,但在正常或假操作的CCA中没有检测到.
- 与WT对照组相比,TNF-/-小鼠的新极值区域显著减少了14倍.
- IL-1RI-/-小鼠呈现了减少新极值面积 (7倍) 的趋势,过度表达膜结合TNF-alpha的小鼠呈现出明显的纤维增殖反应.
结论:
- 内源性TNF-alpha和IL-1直接调节低剪切应激诱导的新极限增生症 (NIH).
- 通过独立于可溶性TNF-alpha的机制,NIH可以发展.
- 用特定疗法准TNF-alpha和IL-1具有减轻NIH的潜力.
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