Department of Emergency Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China.
Department of Emergency Medicine, Shengjing Hospital of China Medical University, Shenyang, Liaoning, China.
Biochim Biophys Acta Mol Basis Dis. 2024 Oct;1870(7):167331. doi: 10.1016/j.bbadis.2024.167331. Epub 2024 Jul 1.
Sepsis-induced acute kidney injury (S-AKI) is a severe and frequent complication that occurs during sepsis. This study aimed to understand the role of FOXQ1 in S-AKI and its potential upstream and downstream regulatory mechanisms. A cecal ligation and puncture induced S-AKI mouse model in vivo and an LPS-induced HK-2 cell model in vitro were used. FOXQ1 was significantly upregulated in CLP mice and downregulated in the LPS-induced HK-2 cells. Upregulation of FOXQ1 improved kidney injury and dysfunction in CLP mice. Overexpression of FOXQ1 remarkably suppressed the apoptosis and inflammatory response via down-regulating oxidative stress indicators and pro-inflammatory factors (IL-1β, IL-6, and TNF-α), both in vivo and in vitro. From online analysis, the CREB5/NF-κB axis was identified as the downstream target of FOXQ1. FOXQ1 transcriptionally activated CREB5, upregulating its expression. Overexpression of FOXQ1 suppressed the phosphorylation level and nucleus transport of p65. Rescue experiments showed that CREB5 mediates the protective role of FOXQ1 on S-AKI. Furthermore, FOXQ1 was identified as a substrate of USP10, a deubiquitinating enzyme. Ectopic expression of USP10 reduced the ubiquitination of FOXQ1, promoting its protein stability. USP10 upregulation alleviated LPS-induced cell apoptosis and inflammatory response, while suppression of FOXQ1 augmented these trends. Collectively, our results suggest that FOXQ1, deubiquitinated by USP10, plays a protective role in S-AKI induced inflammation and apoptosis by targeting CREB5/NF-κB axis.
脓毒症相关性急性肾损伤(S-AKI)是脓毒症期间发生的一种严重且常见的并发症。本研究旨在了解 FOXQ1 在 S-AKI 中的作用及其潜在的上下游调控机制。本研究构建了体内盲肠结扎穿孔(CLP)诱导的 S-AKI 小鼠模型和体外脂多糖(LPS)诱导的 HK-2 细胞模型。结果显示,CLP 小鼠中 FOXQ1 显著上调,LPS 诱导的 HK-2 细胞中 FOXQ1 下调。过表达 FOXQ1 可改善 CLP 小鼠的肾损伤和功能障碍。过表达 FOXQ1 可通过下调氧化应激指标和促炎因子(IL-1β、IL-6 和 TNF-α),在体内和体外显著抑制细胞凋亡和炎症反应。通过在线分析,鉴定出 CREB5/NF-κB 轴是 FOXQ1 的下游靶标。FOXQ1 转录激活 CREB5,上调其表达。过表达 FOXQ1 抑制 p65 的磷酸化水平和核转位。挽救实验表明,CREB5 介导了 FOXQ1 对 S-AKI 的保护作用。此外,FOXO1 被鉴定为去泛素化酶 USP10 的底物。USP10 的过表达减少了 FOXQ1 的泛素化,促进了其蛋白稳定性。USP10 的上调减轻了 LPS 诱导的细胞凋亡和炎症反应,而 FOXQ1 的抑制增强了这些趋势。综上所述,我们的结果表明,USP10 去泛素化的 FOXQ1 通过靶向 CREB5/NF-κB 轴在 LPS 诱导的炎症和细胞凋亡中发挥保护作用。
Biochim Biophys Acta Mol Basis Dis. 2024-10
Biochim Biophys Acta Mol Basis Dis. 2018-12-15