Department of Medical Technology, Faculty of Allied Health Sciences, Thammasat University, Pathum Thani, 12120, Thailand.
Chulabhorn International College of Medicine, Thammasat University, Pathum Thani, 12120, Thailand.
Sci Rep. 2023 Jun 19;13(1):9895. doi: 10.1038/s41598-023-37158-1.
The epithelial cell-derived cytokines IL-33 and IL-25 are important mediators in driving type-2 inflammation during C. neoformans infection. Nevertheless, the impact of these cytokines in regulating host T helper cell response during C. neoformans infection is still unclear. We observed that C. neoformans infection promoted a predominant increase of T helper cells that co-expressed IL-25 and IL-33 receptors within the lung during the late infection phase. A comparative transcriptomic analysis of effector T helper cells co-treated with IL-25 and IL-33 revealed a cooperative effect of these cytokines in promoting IL-13 gene expression. Without IL-25 receptor signaling, IL-33 treatment upregulated Th1-associated genes and genes associated with nucleotide metabolism. By contrast, IL-25 had a unique effect in enhancing type-2 cytokines IL-5 and IL-9 and chemokine CCL24, as well as genes in the pathways that are associated with L-arginine metabolisms. Interestingly, this pathogenic T helper cell population that expressed IL-25 and IL-33 receptors was greatly enriched in mice that were infected with high cryptococcal virulence and associated with fungal burdens in the brain. Therefore, our data further provide the additional function of IL-25 and IL-33 in potentiating cryptococcal brain dissemination.
上皮细胞衍生的细胞因子 IL-33 和 IL-25 是在新型隐球菌感染中驱动 2 型炎症的重要介质。然而,这些细胞因子在调节宿主辅助性 T 细胞反应中的作用在新型隐球菌感染中仍不清楚。我们观察到,新型隐球菌感染在晚期感染阶段促进了肺内表达 IL-25 和 IL-33 受体的辅助性 T 细胞的显著增加。用 IL-25 和 IL-33 共同处理效应性辅助性 T 细胞的比较转录组分析显示,这些细胞因子在促进 IL-13 基因表达方面具有协同作用。没有 IL-25 受体信号,IL-33 处理上调了 Th1 相关基因和与核苷酸代谢相关的基因。相比之下,IL-25 具有独特的作用,可增强 2 型细胞因子 IL-5 和 IL-9 以及趋化因子 CCL24,以及与 L-精氨酸代谢相关的途径中的基因。有趣的是,在感染高新型隐球菌毒力的小鼠中,表达 IL-25 和 IL-33 受体的这种致病性辅助性 T 细胞群大大富集,并与大脑中的真菌负荷相关。因此,我们的数据进一步提供了 IL-25 和 IL-33 在增强新型隐球菌脑传播中的额外功能。