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Nat Commun:中性粒细胞也能产生IL-6

2015-01-26 佚名 生物谷

近日,国际期刊Nature Communication在线发表了意大利科学家的一项最新研究成果,他们发现在人的中性粒细胞中,IL-6的染色质结构持续保持无活性的凝集状态。但当受到信号刺激,中性粒细胞中的IL-6基因位点的染色质能够发生重塑,从而启动IL-6表达和分泌。 关于人类中性粒细胞能否产生IL-6的问题一直存在争议,Maili Zimmermann等人利用分离纯化的人中性粒细胞发现,在无刺

近日,国际期刊Nature Communication在线发表了意大利科学家的一项最新研究成果,他们发现在人的中性粒细胞中,IL-6的染色质结构持续保持无活性的凝集状态。但当受到信号刺激,中性粒细胞中的IL-6基因位点的染色质能够发生重塑,从而启动IL-6表达和分泌。

关于人类中性粒细胞能否产生IL-6的问题一直存在争议,Maili Zimmermann等人利用分离纯化的人中性粒细胞发现,在无刺激情况下,IL-6基因位点的染色质结构呈凝集状态,当给与TLR8配体或TLR4配体刺激时,在IL-6转录起始位点上游约14kb位置存在的一个潜在增强子首先被诱导,而后影响了IL-6的基因表达。除此之外,IL-6的表达还受到内源性TNF-a的刺激,TNF-a能够促进共激活因子 IκBζ的合成,同时持续募集C/EBPβ并维持了IL-6基因调控区域的组蛋白乙酰化修饰。

综上所述,该文章利用分离纯化的中性粒细胞发现在受到刺激的情况下,人类中性粒细胞也能产生分泌IL-6,对于人中性粒细胞能否产生IL-6的争议提供了一个确实的实验证据。同时通过实验证明了中性粒细胞启动IL-6合成这一过程中,IL-6基因位点的染色质所发生的变化,说明染色质重塑以及细胞外信号刺激对中性粒细胞合成IL-6都是非常必要的。

原始出处

Zimmermann M1, Aguilera FB1, Castellucci M1, Rossato M1, Costa S1, Lunardi C2, Ostuni R3, Girolomoni G4, Natoli G3, Bazzoni F1, Tamassia N1, Cassatella MA1.Chromatin remodelling and autocrine TNFα are required for optimal interleukin-6 expression in activated human neutrophils.Nat Commun. 2015 Jan 23;

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    2016-01-01 liye789132251
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    2015-12-13 liuli5079
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    2015-01-28 kzlchina
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