Am J Resp Crit Care:脓毒症中性粒细胞自噬早于胞外陷阱形成!

2017-04-03 xing.T MedSci原创

这些结果表明,中性粒细胞自噬早于中性粒细胞NETs形成增加,这对于败血症期间中性粒细胞效应功能非常重要。该研究为脓毒症期间中性粒细胞自噬的作用提供了重要的见解。

中性粒细胞是宿主对脓毒症免疫应答的关键效应细胞。过度刺激或中性粒细胞功能失调被认为是引起脓毒症的发病机制。然而,脓毒症中中性粒细胞调节功能可塑性的机制尚未完全确定。近日,呼吸内科以及重症医学领域权威杂志Am J Resp Crit Care上发表了一篇研究文章,研究人员旨在调查社区获得性肺炎患者发生脓毒症时自噬在中性粒细胞功能中的作用。

研究人员从感染患者分离的嗜中性粒细胞,并采用(12-)十四酸佛波酯(-13-)乙酸盐 (PMA)刺激。研究人员对活性氧(ROS)生成、中性粒细胞外的陷阱(NET)形成、颗粒释放和自噬状况进行了评估,进一步在脓毒症小鼠模型上评估中性粒细胞自噬增强的效应。

从脓毒症患者中分离出的中性粒细胞表现出自噬诱导增强,并早于PMA刺激引起的NET形成。相反,从没有脓毒症患者中分离出的中性粒细胞表现出自噬失调,并且对PMA刺激的反应程度降低。自噬诱导早于健康的中性粒细胞NETs形成,反之亦然。在脓毒症的小鼠模型中,自噬增强通过NETs依赖的机制提高生存率。

这些结果表明,中性粒细胞自噬早于中性粒细胞NETs形成增加,这对于败血症期间中性粒细胞效应功能非常重要。该研究为脓毒症期间中性粒细胞自噬的作用提供了重要的见解。

原始出处:

So Young Park , et al. Autophagy Primes Neutrophils for Neutrophil Extracellular Trap Formation During Sepsis. AM J RESP CRIT CARE 2017. http://dx.doi.org/10.1164/rccm.201603-0596OC

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    2017-04-04 若轩

    好高大上

    0

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    2017-04-04 明天会更好!

    学习了,学习了!

    0

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    2017-04-03 明月清辉

    谢谢分享,学习了

    0

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    2017-04-03 ideal肿瘤医

    学习了

    0

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