Cutting Edge: Anthrax Lethal Toxin Inhibits Activation of IFN-Regulatory Factor 3 by Lipopolysaccharide 1
Cutting Edge: Anthrax Lethal Toxin Inhibits Activation of IFN-Regulatory Factor 3 by Lipopolysaccharide 1
复制标题
最前沿：炭疽致死毒素抑制脂多糖 1 激活干扰素调节因子 3
作者：
Oanh T Dang;Lorena Navarro;K. Anderson;M. David
IFN-regulatory factor 3 (IRF3) is known to participate in the transcriptional induction of chemokines and cytokines, including IFNs, as a result of viral or bacterial infection. In this study, we demonstrate that the LPS-mediated activation of IRF3 and subsequent induction of chemokine genes or IRF3-responsive reporter constructs are inhibited after exposure of human or murine macrophages to the Bacillus anthracis toxin lethal factor. The inhibitory effect is caused by interference with the activation of the stress-activated protein kinase, p38, due to a proteolytic cleavage of mitogen-activated protein kinase kinase 6, and can be overcome by the ectopic expression of a cleavage-resistant mutant of mitogen-activated protein kinase kinase 6 or a constitutively active IRF3. The lethal factor-mediated inhibition of IRF3 activation and subsequent cytokine production through bacterial membrane components offers Bacillus anthracis an efficient mechanism to evade the innate immune response.
影响因子：
16
作者：
Wathelet, MG;Lin, CH;Maniatis, T
通讯作者：
Maniatis, T