Gliotoxin 13C13

Gliotoxin-13C13is intended for use as an internal standard for the quantification of gliotoxin by GC- or LC-MS. Gliotoxin is an immunosuppressive mycotoxin produced by pathogenic strains ofAspergillusand other fungi with diverse biological activities.1,2,3,4,5,6,7,8It inhibits 20S proteasomal chymotrypsin activity (IC50= 10 μM), blocking the degradation of IκBα and preventing the activation of NF-κB.2,3Gliotoxin induces apoptosis in monocytes and dendritic cells and reduces phagocytosis by neutrophils.4,5It suppresses viral infection by Nipah and Hendra virus in HEK293T cells (IC50s = 149 and 579 nM, respectively).6Under reducing conditions, gliotoxin inhibits leukotriene A4hydrolase epoxide hydrolase activity, but not aminopeptidase activity, and leukotriene B4synthesis in neutrophils and monocytes.7

Gliotoxin 是一种次生代谢产物，由A. fumigatus 分泌，可以抑制巨噬细胞的吞噬作用和其他免疫细胞的免疫功能。它通过阻止 IκB 降解来抑制诱导型NF-κB 活性，从而诱导宿主细胞凋亡。它可以激活PKA 并增加细胞内 cAMP 浓度，调节肌动蛋白细胞骨架重排以促进A. fumigatus 内化到肺上皮细胞。