Gasdermin D restricts Burkholderia cenocepacia infection in vitro and in vivo.

Gasdermin D restricts Burkholderia cenocepacia infection in vitro and in vivo.
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Gasdermin D在体外和体内限制新洋葱伯克霍尔德菌感染。

DOI:
10.1038/s41598-020-79201-5
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发表时间:
2021-01-13
期刊:
影响因子:
4.6
通讯作者:
Amer AO
Amer AO
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Estfanous S;Krause K;Anne MNK;Eltobgy M;Caution K;Abu Khweek A;Hamilton K;Badr A;Daily K;Carafice C;Baetzhold D;Zhang X;Li T;Wen H;Gavrilin MA;Haffez H;Soror S;Amer AO

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新洋葱伯克霍尔德氏菌(B. cenocepacia)是一种机会性细菌;在包括囊性纤维化患者在内的免疫功能低下的个体中引起严重的危及生命的全身性感染。缺乏gasdermin D(GSDMD)可保护小鼠免受内毒素脂多糖(LPS)休克。另一方面,GSDMD促进小鼠对某些细菌感染的存活。然而,GSDMD在B.尚未确定新洋葱虫感染情况。我们的体外研究表明,GSDMD限制B。新洋葱虫在巨噬细胞内的复制不依赖于其通过促进线粒体活性氧(mROS)产生而在细胞死亡中的作用。已知mROS刺激自噬,因此,在B期间抑制mROS或不存在GSDMD。cenocepacia感染减少了自噬,自噬在病原体的限制中起关键作用。GSDMD促进对B的炎症反应。通过介导炎性小体依赖性细胞因子(IL-1β)和非依赖性细胞因子(CXCL 1)(KC)的释放,另外,不同的B.新洋葱分泌系统(T3 SS、T4 SS和T6 SS)有助于炎性小体活化以及巨噬细胞内的细菌存活。体内研究证实了体外研究结果,并表明GSDMD限制B。cenocepacia感染和传播,并刺激自噬反应B。cenocepacia。然而,GSDMD促进肺部炎症和坏死,以响应B。cenocepacia没有改变小鼠的生存。本研究描述了GSDMD对B反应的双刃作用。并显示GSDMD介导的mROS在限制B中的重要性。cenocepacia。
Burkholderia cenocepacia (B. cenocepacia) is an opportunistic bacterium; causing severe life threatening systemic infections in immunocompromised individuals including cystic fibrosis patients. The lack of gasdermin D (GSDMD) protects mice against endotoxin lipopolysaccharide (LPS) shock. On the other hand, GSDMD promotes mice survival in response to certain bacterial infections. However, the role of GSDMD during B. cenocepacia infection is not yet determined. Our in vitro study shows that GSDMD restricts B. cenocepacia replication within macrophages independent of its role in cell death through promoting mitochondrial reactive oxygen species (mROS) production. mROS is known to stimulate autophagy, hence, the inhibition of mROS or the absence of GSDMD during B. cenocepacia infections reduces autophagy which plays a critical role in the restriction of the pathogen. GSDMD promotes inflammation in response to B. cenocepacia through mediating the release of inflammasome dependent cytokine (IL-1β) and an independent one (CXCL1) (KC). Additionally, different B. cenocepacia secretory systems (T3SS, T4SS, and T6SS) contribute to inflammasome activation together with bacterial survival within macrophages. In vivo study confirmed the in vitro findings and showed that GSDMD restricts B. cenocepacia infection and dissemination and stimulates autophagy in response to B. cenocepacia. Nevertheless, GSDMD promotes lung inflammation and necrosis in response to B. cenocepacia without altering mice survival. This study describes the double-edged functions of GSDMD in response to B. cenocepacia infection and shows the importance of GSDMD-mediated mROS in restriction of B. cenocepacia.
形成孔的蛋白质加油D可以调节白细胞介素-1的巨噬细胞分泌。
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