A TLR4-independent critical role for CD14 in intracellular LPS sensing.

A TLR4-independent critical role for CD14 in intracellular LPS sensing.
复制标题

CD14在细胞内LPS传感中的TLR4独立关键作用。

DOI:
10.1016/j.celrep.2022.110755
复制
发表时间:
2022-05-03
期刊:
影响因子:
8.8
通讯作者:
Rathinam, Vijay A.
Rathinam, Vijay A.
中科院分区:
生物学1区
文献类型:
--
作者:
Vasudevan, Swathy O.;Russo, Ashley J.;Kumari, Puja;Vanaja, Sivapriya Kailasan;Rathinam, Vijay A.

文献摘要

参考文献

被引文献

相似文献

细胞内脂多糖(LPS)由非典型炎性小体(包括半胱天冬酶-4或-11)感应控制抗菌宿主防御。LPS如何在体内获得细胞内通路在很大程度上是未知的。在这里,我们表明,CD 14-LPS结合蛋白与TLR 4激活的作用有据可查的发挥了至关重要的作用,在体内细胞内的LPS传感。通过在Tlr 4 −/−背景下产生Cd 14 −/−和Casp 11 −/−小鼠品系,我们将CD 14在TLR 4信号传导中的已知作用与其在caspase-11活化中的作用分离开来,并显示CD 14在GSDMD活化,焦亡,alarmin释放和胞质LPS驱动的致死性中的TLR 4独立作用。从机制上讲,CD 14通过以TLR 4非依赖性方式介导LPS的胞质定位来激活胱天蛋白酶-11。总体而言,我们的研究结果属性的关键作用,CD 14在非经典炎症体感应LPS在体内和建立与以前的文献-CD 14作为一个重要的近端组件TLR 4为基础的细胞外和caspase-11为基础的细胞内LPS监视。LPS如何在体内到达胞质尚不清楚。Vasudevan等人定义了CD 14在LPS的胞质定位中的TLR 4非依赖性作用,触发体内非典型炎性小体活化和焦亡。这一发现将CD 14定位为细胞外和细胞内LPS监视途径的组成部分。
Intracellular lipopolysaccharide (LPS) sensing by the noncanonical inflammasome comprising caspase-4 or −11 governs antibacterial host defense. How LPS gains intracellular access in vivo is largely unknown. Here, we show that CD14—an LPS-binding protein with a well-documented role in TLR4 activation—plays a vital role in intracellular LPS sensing in vivo. By generating Cd14−/− and Casp11−/− mice strains on a Tlr4−/− background, we dissociate CD14’s known role in TLR4 signaling from its role in caspase-11 activation and show a TLR4-independent role for CD14 in GSDMD activation, pyroptosis, alarmin release, and the lethality driven by cytosolic LPS. Mechanistically, CD14 enables caspase-11 activation by mediating cytosolic localization of LPS in a TLR4-independent manner. Overall, our findings attribute a critical role for CD14 in noncanonical inflammasome sensing of LPS in vivo and establish—together with previous literature—CD14 as an essential proximal component of both TLR4-based extracellular and caspase-11-based intracellular LPS surveillance. How LPS attains cytosolic access in vivo is unclear. Vasudevan et al. define a TLR4-independent role for CD14 in the cytosolic localization of LPS, triggering noncanonical inflammasome activation and pyroptosis in vivo. This finding positions CD14 as an integral component of both extracellular and intracellular LPS surveillance pathways.
DOI: 10.1126/science.1240988
发表时间: 2013-09-13
期刊: Science (New York, N.Y.)
影响因子: --
作者:
Hagar JA;Powell DA;Aachoui Y;Ernst RK;Miao EA
通讯作者: Miao EA
DOI: 10.1111/j.1462-5822.2009.01415.x
发表时间: 2010-04-01
影响因子: 3.4
作者:
Paz, Irit;Sachse, Martin;Sansonetti, Philippe
通讯作者: Sansonetti, Philippe
DOI: 10.1074/jbc.m207873200
发表时间: 2002-12-06
影响因子: 4.8
作者:
Latz, E;Visintin, A;Espevik, T
通讯作者: Espevik, T
DOI: 10.1172/jci94495
发表时间: 2017-11-01
影响因子: 15.9
作者:
Cheng, Kwong Tai;Xiong, Shiqin;Malik, Asrar B.
通讯作者: Malik, Asrar B.
焦亡是由非选择性gasdermin-D孔驱动的,其形态与MLKL通道介导的坏死性凋亡不同
DOI: 10.1038/cr.2016.100
发表时间: 2016-09
期刊: Cell research
影响因子: 44.1
作者:
通讯作者: --