Cytoplasmic LPS activates caspase-11: implications in TLR4-independent endotoxic shock.
Cytoplasmic LPS activates caspase-11: implications in TLR4-independent endotoxic shock.
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DOI:
10.1126/science.1240988
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发表时间:
2013-09-13
期刊:
影响因子:
--
通讯作者:
Miao EA
中科院分区:
文献类型:
--
作者:
Hagar JA;Powell DA;Aachoui Y;Ernst RK;Miao EA
Inflammatory caspases, such as caspase-1 and -11, mediate innate immune detection of pathogens. Caspase-11 induces pyroptosis, a form of programmed cell death, and specifically defends against bacterial pathogens that invade the cytosol. During endotoxemia, however, excessive caspase-11 activation causes shock. We report that contamination of the cytoplasm by lipopolysaccharide (LPS) is the signal that triggers caspase-11 activation in mice. Specifically, caspase-11 responds to penta- and hexa-acylated lipid A, whereas tetra-acylated lipid A is not detected, providing a mechanism of evasion for cytosol-invasive Francisella. Priming the caspase-11 pathway in vivo resulted in extreme sensitivity to subsequent LPS challenge in both wild type and Tlr4-deficient mice, whereas caspase 11-deficient mice were relatively resistant. Together, our data reveal a new pathway for detecting cytoplasmic LPS.
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影响因子:
6.7
作者:
Kanistanon, Duangjit;Hajjar, Adeline M.;Pelletier, Mark R.;Gallagher, Larry A.;Kalhorn, Thomas;Shaffer, Scott A.;Goodlett, David R.;Rohmer, Laurence;Brittnacher, Mitchell J.;Skerrett, Shawn J.;Ernst, Robert K.
通讯作者:
Ernst, Robert K.
DOI:
10.1073/pnas.0913087107
发表时间:
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作者:
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通讯作者:
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DOI:
10.1073/pnas.1202908109
发表时间:
2012-05-29
影响因子:
11.1
作者:
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通讯作者:
Ernst, Robert K.
DOI:
10.1126/science.1230751
发表时间:
2013-02-22
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Aachoui Y;Leaf IA;Hagar JA;Fontana MF;Campos CG;Zak DE;Tan MH;Cotter PA;Vance RE;Aderem A;Miao EA
通讯作者:
Miao EA
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