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在巨细胞中由齐莫桑诱导的炎症酶激活的分子机制

Rangel L Silva¹, Alexandre H Lopes¹, Amanda Becerra²

¹Center for Research in Inflammatory Diseases (CRID), Department of Pharmacology, Ribeirão Preto Medical School, University of Sao Paulo (USP), Brazil.

Cellular signalling

|September 20, 2024

概括

齐莫桑通过破坏细胞内ATP水平,触发了巨细胞中炎症性细胞因子IL-1β的释放. 这种代谢功能障碍激活了NLRP3炎症酶,这对于对真菌颗粒的免疫反应至关重要.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
代谢途径代谢途径

背景情况:

来自Saccharomyces cerevisiae的Zymosan是一种强大的免疫调节剂,用于研究炎症反应.
巨细胞释放的促炎细胞因子IL-1β对于对抗真菌感染至关重要,但其精确的调节尚不清楚.

研究的目的:

阐明控制腹巨中因齐莫桑诱导的活性IL-1β释放的细胞内机制.
为了研究代谢变化对齐莫森介导的炎症酶激活的作用.

主要方法:

巨细胞被兴奋使用zymosan.
分析了包括TLR2/MyD88和Dectin-1在内的细胞内信号通路.
测量了细胞内离子度和ATP水平的变化.
评估了NLRP3炎症组分 (ASC,caspase-1) 的作用.
操纵了糖溶性流量以观察对ATP和炎症酶激活的影响.

主要成果:

齐莫桑通过TLR2/MyD88启动亲IL-1β的形成,而Dectin-1放大其转化为活性IL-1β.
活跃的IL-1β释放取决于NLRP3,ASC和caspase-1,由细胞内的减少引发.
齐莫桑激活卡斯帕-1不需要细胞分裂,但与细胞内ATP的快速下降相关.
破坏糖分流会加剧ATP的减少,并放大卡斯巴酶-1和IL-1β的激活.

结论:

巨细胞对齐莫桑的识别会诱导代谢功能障碍,其特征是细胞内ATP的减少.
这种ATP耗尽与NLRP3炎症酶的激活直接相关,导致IL-1β释放.
这些发现揭示了真菌诱导的新陈代谢变化与巨细胞炎症信号之间的新联系.

关键词:

这就是ATPATPATP ATP.一个IL-1ββ.在炎症中,一些细胞会发炎.巨细胞是一个巨细胞.在NLRP3中,NLRP3是NLRP3中的一个.在Zymosanosan中,我们可以看到.

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