Nε-Carboxymethyl-Lysine 修改细胞外矩阵蛋白质 增加纤维细胞激活
Harshavardhana H Ediga1,2, Patrick Hester1, Adithi Yepuri1
1Division of Pulmonary, Critical Care and Sleep Medicine, Department of Internal Medicine, University of Cincinnati, Cincinnati, OH 45267-0564, USA.
International journal of molecular sciences
|November 14, 2023
概括
像Nε-carboxymethyl-lysine (CML) 这样的高级糖化最终产品 (AGEs) 改变了细胞外基质 (ECM),损害了其抗纤维功能,并促进了肺纤维化中的纤维细胞激活.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 病理学 病理学 病理学
背景情况:
- 细胞外基质 (ECM) 对组织结构和纤维细胞的功能至关重要.
- 与年龄相关的修改,如Nε-carboxymethyl-lysine (CML),一种高级糖化最终产品 (AGE),可以改变ECM特性.
- 修改CML的ECM (CML-ECM) 对纤维细胞在纤维瘤疾病中的行为的影响在很大程度上是未知的.
研究的目的:
- 为了研究CML-AGEs在肺组织中的积累.
- 为了确定CML修饰的ECM对纤维细胞激活,增殖,存活,转化和矩阵生产的影响.
- 探索CML-ECM在异形性肺纤维化 (IPF) 中的作用.
主要方法:
- 免疫染和免疫斑分析以量化肺组织中CML-AGEs.
- 基因表达分析.
- 纤维细胞激活试验用于评估增殖,纤维细胞转化为肌纤维细胞 (FMT),亡和ECM生产.
主要成果:
- 与年龄相匹配的健康肺相比,IPF肺部的CML-AGE含量显著增加.
- 当ECM被CML修改时,表现出减少的抗纤维性作用.
- CML-ECM显著降低了纤维细胞增殖,FMT,亡和ECM的产生.
结论:
- 在纤维细胞激活中,CML对ECM的修改起着病理作用.
- CML-ECM对IPF和其他纤维性疾病的发病有重大影响.
- 这项研究揭示了一种新的机制,有助于纤维化疾病的进展.
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