IGF-II调节 lysyl氧化酶 propeptide,并通过基本螺旋环-螺旋环 E40 中介其作用,部分通过基本螺旋环-螺旋环 E40 中介
Adegboyega Timothy Adewale1, Shailza Sharma1, Joe E Mouawad1
1Department of Medicine, Medical University of South Carolina, Charleston 29425, 96 Jonathan Lucas Street, MSC637, SC, USA.
胰岛素类生长因子II (IGF-II) 通过调节LOX-Propeptide (LOX-PP) 和BHLHE40转录因子来驱动系统性硬化相关的肺纤维化 (SSc-PF). 向IGF-II,BHLHE40和LOX-PP可能会阻止SSc-PF的进展.
科学领域:
- 纤维化研究纤维化.
- 分子生物学分子生物学
- 系统性硬化症研究研究
背景情况:
- 肺纤维化 (PF) 是系统性硬化症 (SSc) 的严重并发症.
- 之前的研究已经确定了SSc-PF中胰岛素样生长因子II (IGF-II) 和酸氧化酶 (LOX) 的益菌作用.
- 在SSc-PF中,IGF-II的下游介质尚未完全阐明.
研究的目的:
- 在SSc-PF的背景下,确定IGF-II的下游监管中介机构.
- 为了研究LOX-Propeptide (LOX-PP),tolloid-like 1 (TLL1),骨形态遗传蛋白1 (BMP1) 和BHLHE40在SSc-PF中的作用.
- 探索SSc-PF.的潜在治疗点.
主要方法:
- 分析人类的SSc肺组织和白胺诱导的小鼠肺纤维化模型.
- 对LOX-PP,TLL1和BMP1水平的测量.
- 研究IGF-II对各种蛋白质的调节作用.
- 通过基因沉默评估BHLHE40的作用及其对下游目标及其对细胞外矩阵 (ECM) 放松管制的影响.
主要成果:
- 与对照组相比,SSc肺组织的LOX-PP水平较高.
- 在SSc肺纤维化和BLM模型中,TLL1和BMP1分别增加.
- IGF-II对ProLOX,活性LOX,LOX-PP,BMP1和TLL1异型有影响.
- 通过IGF-II激活BHLHE40,导致核局部化,其沉默会降低TLL1和LOX-PP的调节,恢复ECM平衡.
结论:
- IGF-II,BHLHE40和LOX-PP是SSc-PF病变发生的关键参与者.
- IGF-II/BHLHE40/LOX-PP轴为SSc-PF的ECM放松管制做出了贡献.
- 这些因素代表了有前途的治疗目标,有可能阻止SSc-PF的进展.
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