基质刚度对RPE形态,转录和功能方面的影响
Lasse Wolfram1,2,3, Clara Gimpel4,5, Melanie Schwämmle4,6
1Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg, Germany. lasse.wolfram@med.uni-tuebingen.de.
Scientific reports
|March 30, 2024
概括
基质刚度显著影响视网膜色素上皮细胞 (RPE). 增加的度会改变微RNA表达和Wnt/β-catenin信号传递,突出显示细胞外基质.
科学领域:
- 眼睛生物学 眼睛生物学
- 细胞和分子生物学是细胞和分子生物学.
- 生物材料科学是生物材料的科学.
背景情况:
- 布鲁赫膜 (BrM) 和视网膜色素上皮 (RPE) 细胞的变化与诸如与年龄相关的黄斑变性 (AMD) 和遗传性视网膜疾病 (IRD) 等眼睛疾病有关.
- 细胞外矩阵 (ECM) 的机械性质,如BrM刚性,在RPE细胞行为中是关键的,但经常被忽视的因素.
研究的目的:
- 研究基质刚度对RPE细胞的转录组和形态学的影响.
- 了解ECM的机械线索如何影响RPE细胞功能和与眼睛疾病相关的基因表达.
主要方法:
- 在不同硬度 (软硬) 的聚烯胺 (PA) 凝和标准组织培养塑料 (TCP) 上培养ARPE-19细胞.
- 下一代测序 (NGS) 用于分析差异表达的小RNA (sRNA) 和信使RNA (mRNA).
- 量化PCR (qPCR),免疫光和西部涂抹用于验证NGS发现.
主要成果:
- 微RNAs (miRNAs) 的比例随着基质刚度的增加而增加.
- 包括miR-204和miR-222在内的特定miRNAs显示出基于基质刚性的差异表达.
- 不同表达的miRNAs的mRNA目标表现出稳定的表达,这表明miRNAs具有平稳作用.
- 包括Wnt/β-catenin信号元件,MITF和Dicer在内的mRNA转录模式取决于基质刚度.
结论:
- 基质刚度是影响RPE细胞转录组和形态的关键因素.
- ECM的机械特性在调节RPE细胞行为方面发挥着重要作用.
- 这些发现强调了在细胞培养模型中考虑ECM机制对于像AMD这样的ECM相关疾病的重要性.
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