通过基于蛋白质稳定性的基因编码的光报告系统跟踪细胞内不稳定铁
Ali Akyol1, Şeyma Çimen2, Benjamin Gottschalk1
1Gottfried Schatz Research Center, Molecular Biology and Biochemistry, Medical University of Graz, Neue Stiftingtalstraße 6, 8010 Graz, Austria.
ACS sensors
|August 1, 2025
概括
研究人员开发了IronFist,这是一种用于在活细胞中追踪铁 (Fe2+) 的新工具. 这位记者揭示了细胞如何处理铁,显示了对铁补充剂反应的显著差异,并突出了细胞对细胞的铁含量变化.
科学领域:
- 细胞生物学 细胞生物学
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 细胞铁平衡对于许多生物过程至关重要.
- 铁水平的失调与各种疾病有关,包括神经退行性疾病和癌症.
- 需要精确的方法来动态跟踪细胞内可变铁.
研究的目的:
- 开发和验证一种新型的基因编码光记者IronFist,用于实时监测活细胞中的不稳定铁离子 (Fe2+).
- 用铁手记者来调查细胞对不同铁源的反应.
- 为了评估铁处理中的细胞对细胞的变异性.
主要方法:
- 开发了一种双晶体光记者系统 (IronFist),利用一种对铁敏感的血红素类 (Hr) 域与mNeonGreen和一个参考光蛋白 (mCherry) 融合.
- 使用IronFist进行终点测量和时间间隔成像来跟踪不稳定铁的动态.
- 用硫酸铁和铁碳水化合物纳米颗粒对细胞进行处理,以观察细胞铁池的波动.
主要成果:
- 在活细胞中,IronFist成功地实现了不稳定性铁离子 (Fe2+) 的动态跟踪.
- 大多数细胞表现出较低的基底性铁水平,但在补充铁时观察到显著的增加.
- 检测到不同细胞对铁二硫酸盐 (更快,更强) 和铁碳水化合物纳米颗粒 (更慢,更弱) 的反应,以及细胞对细胞的异质性.
结论:
- 铁手提供了一种有价值的工具,用于评估细胞铁平衡,并了解与铁相关的病理.
- 报告员使铁力学能够进行高内容,单细胞水平的跟踪,填补了关键的方法差距.
- 这些发现凸显了细胞处理铁的复杂和异质性质.
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