Inflammasome activation and pyroptosis mediate coagulopathy and inflammation in Salmonella systemic infection.

Inflammasome activation and pyroptosis mediate coagulopathy and inflammation in Salmonella systemic infection.
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炎性小体激活和细胞焦亡介导沙门氏菌全身感染中的凝血病和炎症。

DOI:
10.1016/j.micres.2023.127460
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发表时间:
2023-10
影响因子:
6.7
通讯作者:
Wei, Yinan
Wei, Yinan
中科院分区:
生物学2区
文献类型:
--
作者:
Pandeya, Ankit;Zhang, Yan;Cui, Jian;Yang, Ling;Li, Jeffery;Zhang, Guoying;Wu, Congqing;Li, Zhenyu;Wei, Yinan

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炎性小体活化是抵抗细菌感染的重要防御机制。先前的研究表明,炎症小体的激活可以防止沙门氏菌的口腔感染。在这里,我们发现炎性体激活在沙门氏菌全身性感染的发病机制中起着关键作用。我们发现,在腹腔注射沙门氏菌的全身性感染模型中,caspase-1或gasdermin-D缺乏延长了存活时间,降低了血浆中促炎细胞因子IL-1β、IL-6和TNFα的浓度。在caspase-1或气皮蛋白- d缺乏的小鼠中,凝血酶原时间延长减少,血浆凝血酶-抗凝血酶复合物浓度增加,这些缺陷也可以防止沙门氏菌感染期间的凝血功能障碍。鞭毛蛋白和/或SPI1 3型分泌系统组分激活NAIP/NLRC4炎性体在沙门氏菌诱导的凝血病中起关键作用。在缺乏鞭毛蛋白和SPI1的情况下,沙门氏菌突变菌株仍然通过caspase-11/NLRP3途径引发凝血功能障碍。我们的研究结果揭示了以前未披露的炎症小体和焦亡在沙门氏菌全身性感染发病机制中的作用。
Inflammasome activation is a critical defense mechanism against bacterial infection. Previous studies suggest that inflammasome activation protects against Salmonella oral infection. Here we find inflammasome activation plays a critical role in the pathogenesis of Salmonella systemic infection. We show that in a systemic infection model by i.p. injection of Salmonella, deficiency of caspase-1 or gasdermin-D prolonged survival time, reduced plasma concentrations of the proinflammatory cytokines IL-1β, IL-6 and TNFα. These deficiencies also protected against coagulopathy during Salmonella infection as evidenced by diminished prolongation of prothrombin time and increase in plasma thrombin-antithrombin complex concentrations in the caspase-1 or gasdermin-D deficient mice. Activation of the NAIP/NLRC4 inflammasome by flagellin and/or the components of the SPI1 type 3 secretion system played a critical role in Salmonella-induced coagulopathy. In the absence of flagellin and SPI1, the Salmonella mutant strain still triggered coagulopathy through the caspase-11/NLRP3 pathway. Our results reveal a previously undisclosed role of the inflammasomes and pyroptosis in the pathogenesis of Salmonella systemic infection.
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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