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Updated: Jun 27, 2025

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Measurement of Heme Synthesis Levels in Mammalian Cells
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血红蛋白和血红蛋白都会通过铁离子积累对视网膜色素表皮造成损伤
Aomi Muramatsu1, Shinsuke Nakamura1, Tasuku Hirayama2
1Molecular Pharmacology, Department of Biofunctional Evaluation, Gifu Pharmaceutical University, Gifu, Japan.
Journal of pharmacological sciences
|April 27, 2024
概括
视网膜下出血导致视力丧失,原因是视网膜色素上皮细胞中铁毒性. 从血红蛋白和黄体中积累的铁会引发细胞损伤,但铁化剂可以提供保护.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 毒理学 毒理学 毒理学
背景情况:
- 亚视网膜出血导致视力障碍和视野缺陷.
- 在出血期间由血红蛋白和血红素等有毒物质诱导的细胞损伤的确切机制尚未完全理解.
- 从血红蛋白中释放的铁是细胞损伤的关键组成部分.
研究的目的:
- 为了研究多余的细胞内铁对视网膜色素上皮细胞 (RPE) 细胞的影响.
- 阐明铁积累在暴露于血红蛋白和血红蛋白后的RPE细胞损伤中的作用.
- 评价铁化剂对出血引起的RPE细胞损伤的保护潜力.
主要方法:
- 利用Fe2+探头SiRhoNox-1测量ARPE-19细胞内细胞内铁的积累,这些细胞被用血红蛋白或血红素治疗.
- 评估了活性氧物种 (ROS) 的产生和脂质过氧化.
- 评估了铁化剂2,2'-双 (BP) 和铁-1 (Fer-1) 的保护作用.
主要成果:
- 血红蛋白和血红素治疗显著增加了Fe2+的积累,ROS的产生和RPE细胞中的脂质过氧化.
- 用BP治疗有效抑制了RPE细胞死亡,ROS产生和脂质过氧化.
- 铁-1预处理以剂量依赖的方式改善了RPE细胞死亡,并减少了ROS生产和脂质过氧化.
结论:
- 由血红蛋白和血红素暴露引起的细胞内铁积累有助于RPE细胞损伤.
- 亚视网膜出血可以诱导RPE细胞损伤和视觉功能障碍通过铁过载.
- 像BP和Fer-1这样的铁合剂在缓解RPE细胞损伤方面显示出潜在的治疗益处.
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