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过度表达Bmi-1通过TIME途径减轻维生素D缺乏引起的肺纤维化

Jin'ge Zhang¹, Mingxin Huang¹, Jiawen Zhou¹

¹The Research Center for Bone and Stem Cells, Department of Anatomy, Histology and Embryology, Nanjing Medical University, Nanjing 211166, Jiangsu, China.

Cellular signalling

|October 18, 2025

概括

维生素D缺乏症通过激活TGF-β1.1,使肺纤维化恶化. 过度表达Bmi-1蛋白通过抑制这种途径和减少纤维化来保护肺部.

科学领域:

肺部医学肺部医学
分子生物学分子生物学
细胞衰老细胞衰老

背景情况:

维生素D缺乏与老化相关的肺纤维化 (SAPF) 有关.
连接维生素D缺乏与SAPF的确切机制尚未完全理解.
在这种情况下,Bmi-1的作用在很大程度上是未被探索的.

研究的目的:

研究Bmi-1在维生素D缺乏引起的SAPF中的保护作用.
阐明Bmi-1对肺纤维化的影响背后的分子机制.
探索针对Bmi-1/VDR/TGF-β1轴的治疗潜力.

主要方法:

使用了一种1,25(OH) 2D缺乏的小鼠模型 (Cyp27b1异合的小鼠).
在介质细胞中使用转基因Bmi-1过度表达.
进行了呼吸系参数分析,组织学检查,分子测定 (CUT&RUN,光酶报告者) 和初级细胞培养实验.

主要成果:

中细胞Bmi-1过度表达改善了SAPF,改善了呼吸功能并减少了原沉积.
Bmi-1抑制了TGF-β1/IL-11/MEK/ERK信号通路,降低了衰老标志物,并抑制了肌纤维细胞分化.
发现1,25(OH) 2D3通过VDR结合直接调节Tgf-β1转录,将维生素D信号与纤维化联系起来.

结论:

Bmi-1 对维生素D缺乏引起的SAPF起着重要的保护作用.
针对Bmi-1/VDR/TGF-β1轴为纤维化肺部疾病提供了潜在的治疗策略.
这项研究确定了维生素D信号传递和肺部纤维化通路之间的新型分子联系.

关键词:

在BMI-1中,细胞衰老细胞衰老肺部纤维化肺部纤维化在TGF-β1中.维生素D缺乏症是因为缺乏维生素D.

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