Sci Rep:cfDNA与长时间体外循环心脏手术后的内皮损伤相关

2017-12-29 xiangting MedSci原创

这项研究证明在CPB持续时间长的心脏手术患者中,血浆cfDNA升高有助于评估CPB介导的不利影响。

体外循环(CPB)可引起炎症并最终导致器官功能障碍和死亡率升高。近来已发现中性粒细胞胞外诱捕网(NETs)参与多种促进组织和器官损伤的心血管疾病。这篇文章旨在阐述循环无细胞(cf)DNA在CPB心脏手术患者中的促炎潜能。

术前和术后d1,d3,d5和d8采集血浆。在第1天发现CPB持续时间延长(> 100分钟)的患者与CPB时间较短(CPB <100分钟)的患者相比,循环性cfDNA水平显著升高。CPB持续时间增加导致循环线粒体(mt)DNA,可溶性凝血调节因子(sCD141)和ICAM-1水平升高,这反映了内皮损伤。在所有时间点都证实存在cfDNA和sCD141间的正相关性。CPB> 100 min患者血浆和cfDNA诱导健康供者中性粒细胞释放NETs,而细胞内toll样受体(TLR)9抑制剂不能抑制这种释放。DNA与中性粒细胞表面TLR9的结合已被证实。

这项研究证明在CPB持续时间长的心脏手术患者中,血浆cfDNA升高有助于评估CPB介导的不利影响,包括内皮损伤。cfDNA触发的NETosis与经典的TLR9信号无关。

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    2018-12-15 longerg
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    2017-12-29 1e0e5a1fm42(暂无匿称)

    henhao

    0

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